JP2018044721A - Heat supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat supply system capable of efficiently operating a plurality of heat source devices according to a state of a heat utilization device.SOLUTION: A heat supply system includes a first temperature detection portion 46 detecting a first temperature of hot water/water in a tank 17, and a second temperature detection portion 45 detecting a second temperature of hot water/water at an upper part with respect to the first temperature detection portion 46. A control device C operates a cogeneration device CG, and operates flowing state adjustment devices 6, 7, 33, 44 to circulate a heat medium between the cogeneration device CG and a hot water storage device 16, when the first temperature is a first lower limit temperature permitting a temperature raising operation by utilizing the cogeneration device CG, or less, and operates a boiler device 1 and operates the flowing state adjustment devices 6, 7, 33, 44 to circulate the heat medium between the boiler device 1 and the hot water storage device 16, when the second temperature is a second lower limit temperature permitting a temperature raising operation by utilizing the boiler device 1 or less, and the first lower limit temperature is a temperature less than the second lower limit temperature.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat supply system that includes a plurality of heat source devices that heat a heat medium, and that supplies the heat medium to a plurality of heat utilization devices that use the heat possessed by the heat medium.

Conventionally, there is a heat supply system in which heat generated by a plurality of heat source devices is used by a plurality of heat utilization devices such as hot water supply and heating. For example, in the heat supply system described in Patent Document 1, hot water recovered from heat generated by a plurality of heat source devices such as a heat pump (2) and an external heat source (3) is converted into a water circuit (25) and a hot water circuit (30A). , 30B), and is supplied to a plurality of heat utilization devices such as a hot water storage tank (4) and a heating device (5).
In the heat supply system described in Patent Document 1, priorities for operation of the heat pump (2) and the external heat source (3) are set in advance, and the priorities are ordered according to the load state. The heat pump (2) and the external heat source (3) are operated.

  Patent Document 2 describes a heat supply system that includes a plurality of heat source devices that heat a heat medium, and that supplies the heat medium to a plurality of heat utilization devices that use the heat possessed by the heat medium. ing. The first heat utilization device among the plurality of heat utilization devices is a hot water storage device having a tank for storing hot water and heating the hot water in the tank using the heat held by the heat medium. The 2nd heat utilization apparatus of apparatuses is a heating apparatus which heats using the heat which a heat carrier has. The first heat source device among the plurality of heat source devices is a cogeneration device that generates heat and electricity together, and the second heat source device among the plurality of heat source devices is combustion generated by burning fuel. It is a boiler device that heats a heat medium with heat. In addition, the tank includes a first temperature detection unit that detects the temperature of the stored hot water, and a second temperature detection unit that detects the temperature of the hot water above the portion detected by the first temperature detection unit. Is provided. Then, when the first temperature of the hot water detected by the first temperature detection unit is equal to or lower than the first lower limit temperature that permits the temperature raising operation by the heat and power supply device, the control device operates the heat and power supply device, and heat The fluid state adjusting device is operated so that the medium circulates between the combined heat and power supply device and the hot water storage device through the heat medium return path and the heat medium forward path, and the second temperature of the hot water detected by the second temperature detection unit is When the temperature is below the second lower limit temperature that permits the temperature rising operation by the boiler device, the boiler device is operated, and the heat medium circulates between the boiler device and the hot water storage device through the heat medium return path and the heat medium forward path. Operate the flow conditioner to: Furthermore, the first lower limit temperature is set to a temperature equal to or higher than the second lower limit temperature.

  In Patent Document 2, when hot hot water stored in a tank is sent out from a hot water outlet connected to the upper part of the tank, water is replenished from a water supply path connected to the lower part of the tank. There is a relatively low temperature hot water and a relatively high temperature hot water is formed in the upper part of the tank. The first temperature detected by the first temperature detection unit is the temperature of hot water stored relatively below the inside of the tank, compared to the second temperature detected by the second temperature detection unit. That is, as described above, a relatively low temperature hot water exists in the lower part of the tank and a relatively high temperature hot water exists in the upper part of the tank, the first temperature below the second temperature detecting unit. It is the structure which appears first as the temperature fall of the hot water in a detection part. In addition, the first lower limit temperature is a temperature equal to or higher than the second lower limit temperature. As a result, considering that the temperature of the stored hot water decreases from the high temperature side to the low temperature side, the first temperature becomes the first lower limit before the second temperature becomes equal to or lower than the second lower limit temperature. Below temperature. And the heat-and-power cogeneration apparatus with higher energy efficiency starts the temperature rising operation of hot water prior to the boiler apparatus.

6 and 7 are graphs illustrating an example of a temperature change of hot water inside a tank included in the hot water storage device, simulating the hot water storage device described in Patent Document 2. FIG. The configuration of the heat supply system including the hot water storage device is the same as that shown in FIG. 1 of the present application, and the positions of the temperature sensors T1 to T7 provided in the tank are the same as those shown in FIG. 4 of the present application. Therefore, in the following description, it demonstrates using the same referential mark as used in FIG.1 and FIG.4.
When the first temperature of hot water detected by the first temperature sensor 46 (temperature sensor T5) is equal to or lower than the first lower limit temperature at which the temperature raising operation by the combined heat and power supply device CG is permitted, the combined heat and power supply device CG operates. FIG. 6 is an example when the first lower limit temperature is 50 ° C., and FIG. 7 is an example when the first lower limit temperature is 35 ° C. That is, in the example shown in FIG. 6, the cogeneration apparatus CG operates when the first temperature of hot water detected by the first temperature sensor 46 (temperature sensor T5) is 50 ° C. or less, and in the example shown in FIG. The cogeneration apparatus CG operates when the first temperature is 35 ° C. or lower.

  As shown in FIG. 6, in the state where the operation of the combined heat and power supply device and the boiler device is stopped and the temperature rising operation of the hot water in the tank is stopped, the hot water discharge for 1 minute at a flow rate of 2 L / min at about 10:38 When the hot water discharge pause is repeated for 1 minute, the temperature of the hot water starts to decrease with the supply of water into the tank. However, even if water supply is performed in the tank, the temperature drop of hot water appears early in the region close to the water supply channel 8 (measurement region of the temperature sensors T5 to T7), but the region close to the hot water supply channel 9 (temperature sensor T1). The temperature drop of the hot water occurs at a very moderate rate at (measurement site of T4). That is, it can be seen that the lower temperature of the hot water occurs earlier toward the lower side of the tank. Then, when the time reaches about 10:57, the first temperature detected by the first temperature detector (temperature sensor T5) becomes the first lower limit temperature (50 ° C.), so that the temperature raising operation by the combined heat and power supply device is started. Thereby, the temperature of the hot water in the tank starts to rise. Thereafter, in the example shown in FIG. 6, the first temperature detected by the first temperature detection unit (temperature sensor T5) reaches 60 ° C. by the temperature raising operation for about 35 minutes by the combined heat and power supply device, and the temperature raising operation is performed. Is terminated.

  FIG. 7 shows an example in which the first lower limit temperature is 35 ° C., and other conditions are the same as those in FIG. In this case, the operation of the combined heat and power supply device and the boiler device is stopped, and the temperature rising operation of the hot water in the tank is stopped. When the hot water discharge pause is started repeatedly, the temperature of the hot water starts to decrease with the supply of water into the tank. Then, at about 14:29, the first temperature detected by the first temperature detector (temperature sensor T5) becomes the first lower limit temperature (35 ° C.), so that the temperature raising operation by the combined heat and power supply device is started. Thereby, the temperature of the hot water in the tank starts to rise. Thereafter, in the example shown in FIG. 7, the first temperature detected by the first temperature detection unit (temperature sensor T5) reaches 60 ° C. by the temperature raising operation for about 50 minutes by the combined heat and power supply device, and the temperature raising operation is performed. Is terminated.

JP2013-104596A JP 2006-133271 A

  In the heat supply system described in Patent Document 2, after a small amount of water that does not reach the first temperature detection unit is supplied from the water supply channel to the lower part of the tank, for example, by local mixing and heat conduction of hot water and water The temperature stratification at the bottom of the tank may be disturbed and the first temperature may gradually decrease. In general, a combined heat and power device is desirable to operate for as long a time as possible from the viewpoint of durability and heat loss. However, the first lower limit temperature that serves as an index for starting the combined heat and power device is relatively high. Is set to, the first temperature reaches the first lower limit temperature only when a small amount of water is supplied to the lower part of the tank, the combined heat and power unit starts, and the combined heat and power supply just by raising the temperature of the small amount of water. The device may stop operating in a relatively short time. That is, the higher the first lower limit temperature, the shorter the time required to raise the hot water temperature (first temperature) in the tank to the predetermined target temperature by the temperature raising operation of the combined heat and power supply device. Also in the example shown in FIGS. 6 and 7, when the first lower limit temperature is set to 50 ° C. (FIG. 6), the time required for raising the temperature to 60 ° C. is about 35 minutes. When the lower limit temperature is set to 35 ° C. (FIG. 7), the time required for raising the temperature to 60 ° C. is about 50 minutes.

  In addition, if the second lower limit temperature, which is an index for starting the boiler device, is set to a relatively low temperature, the boiler device is started after the hot water temperature in the upper part of the tank is greatly lowered. Therefore, at the time of starting the boiler device, the remaining amount of hot hot water in the tank is reduced. As a result, in a situation where the user uses a large amount of hot water at a hot water supply terminal such as a shower, the hot water temperature rises by the boiler device and the hot water runs out, which may cause inconvenience in use. That is, the problem that the start timing of the boiler device is delayed is considered to occur when the second lower limit temperature is relatively low.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat supply system that can efficiently operate a plurality of heat source devices according to the state of the heat utilization device.

The characteristic configuration of the heat supply system according to the present invention for achieving the above object includes a plurality of heat source devices that heat the heat medium, and a plurality of heat utilization devices that use the heat possessed by the heat medium. A heat supply system for supplying the heat medium,
A heat medium return path that combines the relatively low-temperature heat medium after heat is used in each of the plurality of heat utilization apparatuses, and supplies the heat medium in parallel to each of the plurality of heat source apparatuses; A heat medium forward path that joins the relatively high-temperature heat medium after being heated in each of the plurality of heat source devices, and supplies the heat medium in parallel to each of the plurality of heat utilization devices; and A flow state adjusting device that adjusts the flow state of the heat medium in the heat medium return path and the heat medium forward path, and a control device that controls operations of the plurality of heat source devices and the flow state adjustment device,
The first heat utilization device of the plurality of heat utilization devices is a hot water storage device having a tank for storing hot water, and heating the hot water in the tank using the heat held by the heat medium,
The second heat utilization device of the plurality of heat utilization devices is a heating device that performs heating using heat held by the heat medium,
The first heat source device of the plurality of heat source devices is a cogeneration device that generates heat and electricity together,
A second heat source device of the plurality of heat source devices is a boiler device that heats the heat medium with combustion heat generated by burning fuel,
A heat exchanging unit is provided inside the tank of the hot water storage device, and the heat exchanging unit stores heat in the tank by exchanging heat between the hot water stored in the tank and the heat medium. The hot water is heated,
A hot water supply passage for allowing hot water stored in the tank to flow out of the tank is connected to an upper portion of the tank of the hot water storage device, and hot water from the hot water supply passage is connected to a lower portion of the tank of the hot water storage device. A water supply channel is connected to allow water to be replenished in response to the outflow of water into the tank,
A first temperature detecting unit for detecting a temperature of the hot water stored in the tank; and a temperature of the hot water stored in the tank above the portion detected by the first temperature detecting unit. A second temperature detection unit,
The controller is
When the first temperature of the hot water detected by the first temperature detection unit is equal to or lower than a first lower limit temperature permitting a temperature raising operation using the heat and power supply device, the heat and power supply device is operated, and the heat By operating the flow condition adjusting device so that a medium circulates between the heat and power supply device and the hot water storage device through the heat medium return path and the heat medium forward path, Perform warm operation,
When the second temperature of the hot water detected by the second temperature detection unit is equal to or lower than a second lower limit temperature that allows a temperature raising operation using the boiler device, the boiler device is operated, and the heating medium is A temperature raising operation using the boiler device is performed by operating the flow state adjusting device so as to circulate between the boiler device and the hot water storage device through the heat medium return path and the heat medium forward path. And
The first lower limit temperature is a temperature lower than the second lower limit temperature.

  According to the above characteristic configuration, when hot hot water stored in the tank is sent out from the hot water outlet connected to the upper part of the tank, the water is replenished from the water supply path connected to the lower part of the tank. A relatively low temperature hot water exists in the lower part, and a relatively high temperature hot water exists in the upper part of the tank. The first temperature detected by the first temperature detection unit is the temperature of hot water stored relatively below the inside of the tank, compared to the second temperature detected by the second temperature detection unit. That is, as described above, a relatively low temperature hot water exists in the lower part of the tank and a relatively high temperature hot water exists in the upper part of the tank, the first temperature below the second temperature detecting unit. It is the structure which appears first as the temperature fall of the hot water in the temperature detection site | part of a detection part. As a result, when water is supplied to the tank, the timing at which the first temperature falls below the first lower limit temperature comes earlier than the timing at which the second temperature falls below the second lower limit temperature. Can be expected. When the timing at which the first temperature becomes equal to or lower than the first lower limit temperature arrives earlier than the timing at which the second temperature becomes equal to or lower than the second lower limit temperature, the energy efficient cogeneration device is more There is an advantage that the hot water temperature rising operation is started before the boiler device. In addition, when the second temperature is equal to or lower than the second lower limit temperature, in addition to the combined heat and power supply device, a boiler device having a large heat output can be operated to perform a hot water temperature rising operation.

Further, the fact that the first lower limit temperature is lower than the second lower limit temperature means that the first lower limit temperature is set to be relatively low, and the second lower limit temperature is set to be relatively high. That is. That is, paying attention to the level of the first lower limit temperature that determines the start timing of the combined heat and power device, when the first lower limit temperature is lower as in this feature configuration, the temperature rise operation using the combined heat and power device is used. There is an advantage that the time required until the hot water temperature (first temperature) in the tank is raised to a predetermined target temperature is increased.
When attention is paid to the level of the second lower limit temperature that determines the start timing of the boiler device, the boiler device has a higher temperature at the top of the tank when the second lower limit temperature is higher as in the case of this characteristic configuration. There is an advantage that even if the user uses a large amount of hot water at a hot water supply terminal such as a shower, there is a high possibility that the temperature rise of the hot water by the boiler device will be in time.

Still further, the heat medium return path and the heat medium forward path connecting the combined heat and power supply device, the boiler device, and the hot water storage device are used to transfer the relatively low temperature heat medium after the heat is used in the hot water storage device to the combined heat and power supply device and the boiler. It supplies to each of apparatus parallelly, and it is comprised so that the relatively high-temperature heat medium after heating with each of the combined heat and power supply apparatus and the boiler apparatus may be supplied to the hot water storage apparatus. That is, the heating medium heated by operating the combined heat and power supply device is used for the temperature raising operation in the hot water storage device without passing through the boiler device that is not operating. As a result, the temperature raising operation in the hot water storage device can be performed while effectively utilizing the heat generated in the combined heat and power supply device.
Therefore, it is possible to provide a heat supply system that can efficiently operate a plurality of heat source devices according to the state of the heat utilization device.

Another characteristic configuration of the heat supply system according to the present invention is a temperature increase permission time zone for permitting a temperature increase operation of hot water stored in the tank of the hot water storage device during one day, and a temperature increase operation. The temperature rise non-permission time zone that does not allow is set,
A boiler permission time zone in which operation of the boiler device is permitted within one day and a boiler non-permission time zone in which operation of the boiler device is not permitted are set,
A combined heat and power permitted time zone for permitting the operation of the combined heat and power device and a combined heat and power prohibited time period for not permitting the operation of the combined heat and power device are set in one day,
The controller is
When the current time is in the temperature increase permission time zone and the combined heat and power permission time zone and the first temperature is equal to or lower than the first lower limit temperature, the heat and power supply device is operated, and the heating medium Temperature rise using the heat / electricity supply device by operating the flow state adjusting device so that the heat / current supply device circulates between the heat / electricity supply device and the hot water storage device through the heat medium return path and the heat medium return path Run,
When the current time is in the temperature rise permission time zone and the boiler permission time zone, and the second temperature is equal to or lower than the second lower limit temperature, the boiler device is operated, and the heating medium is A temperature raising operation using the boiler device is performed by operating the flow state adjusting device so as to circulate between the boiler device and the hot water storage device through the heat medium return path and the heat medium forward path. In the point.

  According to the above characteristic configuration, when the current time is in the temperature increase permission time zone, and the current time is in the heat and power cogeneration permission time zone and the first temperature falls below the first lower limit temperature, the thermoelectric The heat generated in the boiler device can be used for the temperature rising operation of the hot water storage device, and the current time is in the boiler permission time zone and the second temperature falls below the second lower limit temperature. Can be used for heating operation of hot water storage devices. As a result, the temperature rising operation of the hot water storage device can be performed while effectively utilizing both the heat generated by the combined heat and power supply device and the heat generated by the boiler device.

Another characteristic configuration of the heat supply system according to the present invention is that the temperature increase permission time zone has at least one individual temperature increase time zone that is continuous in time in one day,
The partial time zone including the start time of one of the individual heating time zones is set so as to overlap in time with the cogeneration permit time zone and not to overlap in time with the boiler permission time zone,
The time zone after the partial time zone is set so as to overlap in time with the cogeneration allowance time zone and the boiler permission time zone.

  According to the above characteristic configuration, only the heat generated by the combined heat and power supply device can be utilized for the temperature raising operation of the hot water storage device in a partial time zone at the start of one individual temperature raising time zone. In addition, after the passage of the partial time zone, both the heat generated in the combined heat and power supply device and the heat generated in the boiler device can be utilized for the temperature increasing operation of the hot water storage device. As a result, the heat generated by the combined heat and power supply device can be preferentially used for the temperature rising operation of the hot water storage device, and the heat generated by the boiler device can also be used for the temperature increase operation of the hot water storage device.

Another characteristic configuration of the heat supply system according to the present invention is that the temperature increase permission time zone has at least one individual temperature increase time zone that is continuous in time in one day,
One of the individual temperature raising time zones is that it is set so as to overlap in time with the cogeneration permitting time zone and not to overlap in time with the boiler permission time zone.

  According to the above characteristic configuration, in one individual temperature raising time zone, the temperature raising operation of the hot water storage device can be performed only by the heat generated by the combined heat and power supply device.

Another characteristic configuration of the heat supply system according to the present invention includes a room temperature detection unit that detects a temperature of air to be heated by the heating device,
A boiler permission time zone in which operation of the boiler device is permitted within one day and a boiler non-permission time zone in which operation of the boiler device is not permitted are set,
A combined heat and power permitted time zone for permitting the operation of the combined heat and power device and a combined heat and power prohibited time period for not permitting the operation of the combined heat and power device are set in one day,
A heating permission time zone in which the operation of the heating device is permitted within one day and a heating non-permission time zone in which the operation is not permitted are set,
The controller is
The current time is in the heating permission time zone and the combined heat and power permission time zone, and the temperature of the air detected by the room temperature detection unit permits the heating operation using the combined heat and power supply device. When the following, the heat and power supply device is operated, and the heat medium is circulated between the heat and power supply device and the heating device through the heat medium return path and the heat medium forward path. By operating the state adjustment device, the heating operation using the cogeneration device is performed,
The present time is in the heating permission time zone and the boiler permission time zone, and the temperature of the air detected by the room temperature detection unit is equal to or lower than a fourth lower limit temperature that permits heating operation using the boiler device. At some point, the boiler apparatus is operated, and the flow state adjusting device is circulated between the boiler device and the heating device through the heating medium return path and the heating medium forward path. By operating, heating operation using the boiler device is executed,
The third lower limit temperature is set to a temperature higher than the fourth lower limit temperature.

According to the above characteristic configuration, when the current time is in the heating permission time zone, the current time is in the combined heat and power permission time zone, and the temperature of the air to be heated is permitted to perform heating operation using the combined heat and power device. When the temperature falls below the third lower limit temperature, the heat generated by the combined heat and power supply device can be used for the heating operation by the heating device, and the current time is in the boiler permission time zone and the temperature of the air to be heated is the boiler. When it becomes below the 4th minimum temperature which permits the heating operation using a device, the heat which occurred with the boiler device can be used for the heating operation by a heating device. As a result, the heating operation by the heating device can be performed while effectively utilizing both the heat generated by the combined heat and power supply device and the heat generated by the boiler device.
In addition, since the third lower limit temperature is set higher than the fourth lower limit temperature, the temperature of the air detected by the room temperature detection unit is detected by the room temperature detection unit before the temperature reaches the fourth lower limit temperature. The temperature of the air becomes the third lower limit temperature. That is, even when the current time is in the heating permission time zone, the combined heat and power permission time zone, and the boiler permission time zone, that is, when the combined heat and power device can be operated depending on the value of the air temperature and the boiler device is in the air Even if it is possible to operate depending on the temperature value, the air temperature is lower than the third lower limit temperature before the air temperature is lower than the fourth lower limit temperature. Is first used for heating operation.

  Another characteristic configuration of the heat supply system according to the present invention is that, when the control device is performing a heating operation using the combined heat and power supply device, the temperature of the air detected by the room temperature detector is a third upper limit temperature. If it becomes more than it, it will be in the non-permission state which does not permit the heating operation using the cogeneration device, and the temperature of the air detected by the room temperature detection unit during the heating operation using the boiler device is the fourth upper limit. When the temperature is higher than the temperature, the heating operation using the boiler device is not permitted, the third upper limit temperature is set higher than the third lower limit temperature, and the fourth upper limit temperature is the fourth lower limit temperature. The temperature is set to a higher temperature, and the third upper limit temperature is set to a temperature higher than the fourth upper limit temperature.

  According to the above characteristic configuration, since the third upper limit temperature is set to a temperature higher than the fourth upper limit temperature, the room temperature detection is performed before the temperature of the air detected by the room temperature detection unit reaches the third upper limit temperature. The temperature of the air detected by the section becomes the fourth upper limit temperature. That is, even if the heating operation is performed using both the combined heat and power supply device and the boiler device, the heating operation using the boiler device is first disabled and stopped. As a result, the period during which the energy efficient cogeneration device is used for the heating operation becomes longer.

  Another characteristic configuration of the heat supply system according to the present invention is that when the first temperature becomes equal to or higher than a first upper limit temperature while the controller is performing a temperature raising operation using the heat and power supply device, the heat and power supply device is the same. When the second temperature is equal to or higher than the second upper limit temperature during the temperature rising operation using the boiler device, the temperature rising operation using the boiler device is not permitted. Is not permitted, the first upper limit temperature is set to a temperature higher than the first lower limit temperature, the second upper limit temperature is set to a temperature higher than the second lower limit temperature, and the first upper limit temperature is set. Is set to a temperature higher than the second upper limit temperature.

  According to the above characteristic configuration, since the first upper limit temperature is set to be higher than the second upper limit temperature, the second temperature is set to the second upper limit before the first temperature becomes the first upper limit temperature. You can expect to reach temperature. That is, even if the temperature raising operation is performed using both the combined heat and power supply device and the boiler device, the temperature raising operation using the boiler device is first disabled and stopped. As a result, the period during which the energy efficient combined heat and power supply apparatus is utilized for the hot water temperature rising operation becomes longer.

Another characteristic configuration of the heat supply system according to the present invention is that the control device includes:
During the heating operation using the combined heat and power device, when the temperature of the air detected by the room temperature detection unit is equal to or higher than a third upper limit temperature, the heating operation using the combined heat and power device is not permitted. Let
During the heating operation using the boiler device, when the temperature of the air detected by the room temperature detection unit is equal to or higher than a fourth upper limit temperature, the heating operation using the boiler device is not permitted and is not permitted.
During the temperature raising operation using the combined heat and power device, when the first temperature is equal to or higher than the first upper limit temperature, the temperature rising operation using the combined heat and power device is not allowed and is not permitted.
During the temperature raising operation using the boiler device, when the second temperature is equal to or higher than the second upper limit temperature, the temperature raising operation using the boiler device is not permitted and is not permitted.
The third upper limit temperature is set to a temperature higher than the third lower limit temperature, the fourth upper limit temperature is set to a temperature higher than the fourth lower limit temperature, and the third upper limit temperature is higher than the fourth upper limit temperature. Is set to
The first upper limit temperature is set to a temperature higher than the first lower limit temperature, the second upper limit temperature is set to a temperature higher than the second lower limit temperature, and the first upper limit temperature is higher than the second upper limit temperature. Is set to
When performing at least one of a temperature raising operation using the cogeneration device and a temperature raising operation using the boiler device, the flow state adjusting device is operated so that the heat medium circulates through the hot water storage device. And when both the temperature raising operation using the combined heat and power supply device and the temperature raising operation using the boiler device are in the non-permitted state, the flow is prevented so that the heat medium does not circulate through the hot water storage device. Operate the conditioning device,
When performing at least one of a heating operation using the cogeneration device and a heating operation using the boiler device, operating the flow condition adjustment device so that the heat medium circulates through the heating device; and When the heating operation using the combined heat and power unit and the heating operation using the boiler device are both in the non-permitted state, the flow state adjusting device is arranged so that the heating medium does not circulate through the heating device. Make it work
When performing at least one of the heating operation and heating operation using the combined heat and power device, the combined heat and power device is operated, and both the heating operation and heating operation using the combined heat and power device are not permitted. When it is in a state, the cogeneration device is stopped,
When performing at least one of the heating operation and heating operation using the boiler device, the boiler device is operated, and both the heating operation and heating operation using the boiler device are in the disapproved state. When the boiler device is stopped.

According to the above characteristic configuration, since the third upper limit temperature is set to a temperature higher than the fourth upper limit temperature, the room temperature detection is performed before the temperature of the air detected by the room temperature detection unit reaches the third upper limit temperature. The temperature of the air detected by the section becomes the fourth upper limit temperature. That is, even if the heating operation is performed using both the combined heat and power supply device and the boiler device, the heating operation using the boiler device is first disabled. As a result, the period during which the energy efficient cogeneration device is used for the heating operation becomes longer.
Further, since the first upper limit temperature is set higher than the second upper limit temperature, the second temperature becomes the second upper limit temperature before the first temperature becomes the first upper limit temperature. I can expect. That is, even if the temperature raising operation is performed using both the combined heat and power supply device and the boiler device, the temperature raising operation using the boiler device is first disabled. As a result, the period during which the energy efficient combined heat and power supply apparatus is utilized for the hot water temperature rising operation becomes longer.

Furthermore, when performing at least one of the heating operation and heating operation using the combined heat and power device, the combined heating and heating device is operated, and both the heating operation and heating operation using the combined heat and power device are not permitted. At some point, the combined heat and power unit is stopped. In other words, just because one of the heating operation and heating operation using the combined heat and power supply device is not permitted, the operation of the combined heat and power supply device is not stopped, and the heating operation using the combined heat and power supply device is not performed. And the cogeneration apparatus are stopped after both the heating operation and the heating operation are not permitted. Thereby, the temperature raising operation and the heating operation using the combined heat and power supply device can be reliably executed.
In addition, when performing at least one of the temperature raising operation and the heating operation using the boiler device, the boiler device is operated, and when both the temperature raising operation and the heating operation using the boiler device are in an unauthorized state, Stop the boiler unit. In other words, just because one of the heating operation and heating operation using the boiler device is not permitted, the operation of the boiler device is not stopped, and the heating operation and heating operation using the boiler device are not stopped. The boiler device is stopped after both of these are in the disapproved state. Thereby, the temperature rising operation and heating operation using a boiler apparatus can be performed reliably.

  Another characteristic configuration of the heat supply system according to the present invention is that the control device is configured such that the second temperature of the hot water detected by the second temperature detector is higher than the second lower limit temperature and the first upper limit. When the temperature is equal to or lower than a second intermediate temperature lower than the temperature, the heat and power supply device is operated, and the heat medium passes through the heat medium return path and the heat medium forward path, and the heat and power supply apparatus and the hot water storage device It is in the point which performs the temperature rising operation using the said heat-and-electric power supply apparatus by operating the said flow state adjustment apparatus so that it may circulate between.

  According to the above characteristic configuration, when the temperature of the hot water decreases in order from the lower side of the tank by replenishing water from the water supply path connected to the lower part of the tank, and the temperature of the hot water by heat radiation generated in the entire tank. In any case where the temperature drops in the entire tank, the second temperature falls below the second intermediate temperature before the second temperature falls below the second lower limit temperature. That is, even if the first temperature is not less than or equal to the first lower limit temperature, the temperature raising operation using the combined heat and power device is performed in response to the second temperature becoming the second intermediate temperature or less. In particular, before starting the temperature raising operation using the boiler device when the second temperature becomes equal to or lower than the second lower limit temperature, the combined heat and power supply according to the second temperature becomes equal to or lower than the second intermediate temperature. Start the temperature rising operation using the device. As a result, even in a situation where the temperature of the hot water drops throughout the tank due to heat dissipation generated in the entire tank, the temperature rise operation of the hot water in the tank is performed preferentially using an energy efficient combined heat and power supply device. It can be carried out.

  Another characteristic configuration of the heat supply system according to the present invention is that the amount existing in the tank between the connection portion of the water supply path to the tank and the first temperature detection unit above the connection portion. When the temperature of the hot water is increased from the first lower limit temperature to the first upper limit temperature by performing a temperature increase operation in a state where a predetermined output is exerted from the combined heat and power supply device, the temperature increase operation must be at least longer than the target period. The connection part of the water supply channel and the installation part of the first temperature detection unit are set so as to be.

In the heat supply system of this feature configuration, if it is desired to perform a temperature rising operation using the combined heat and power supply device for a long time, the connection between the connection part of the water supply channel and the first temperature detection unit above the connection part. The amount of hot water present in the tank may be increased, that is, the connection part of the water supply channel and the installation part of the first temperature detection unit may be set so as to be separated in the vertical direction of the tank.
In this feature configuration, the period required to raise the amount of hot water existing in the tank between the connection portion of the water supply channel and the first temperature detection unit from the first lower limit temperature to the first upper limit temperature is at least the target. Over the period. As a result, the combined heat and power supply device can be started for a long time after being started once.

  Another feature of the heat supply system according to the present invention is that the first lower limit temperature is higher than the temperature of water supplied into the tank via the water supply channel and connected to the hot water supply channel. The temperature is lower than the target temperature of hot water required at the terminal.

According to the above characteristic configuration, the temperature of the water supplied from the water supply channel into the tank is lower than the first lower limit temperature. Therefore, if water is supplied from the water supply channel into the tank, the first temperature decreases and the first temperature decreases. 1 Lower limit temperature. And the one where the first lower limit temperature is set as low as possible, since the combined heat and power supply device is started after reliably detecting that the low temperature water has reached from the bottom of the tank to the first temperature detection unit. The combined heat and power device can be operated continuously for a time.
However, if the first lower limit temperature is set too low, the water temperature will rise in summer, and the first temperature will reach the first lower limit temperature due to heat conduction and mixing with the hot water at the top of the tank. There is a risk that it will not go down. However, it is possible to avoid such a fear by setting the first lower limit temperature higher than the temperature of the water supplied into the tank as in this feature configuration.

  Another characteristic configuration of the heat supply system according to the present invention is that the second lower limit temperature is higher than a target temperature of hot water required at a hot water supply terminal connected to the hot water outlet.

  According to the above characteristic configuration, it is possible to detect at an early stage that the temperature of the hot water stored in the upper part of the tank has started to decrease, and to start the temperature rising operation using the boiler device. Even in situations where a hot water is used, the risk of running out of water due to the loss of hot water from the tank can be reduced.

It is a figure which shows the structure of a heat supply system. It is a functional block diagram of a heat supply system. It is a figure explaining the operation | movement form of a heat supply system. It is a figure which shows the structural example of the tank used in order to demonstrate the temperature change of hot water. It is a graph which shows the example of the temperature change of the hot water in the inside of a tank. It is a graph which shows the example of the temperature change of the hot water in the inside of a tank. It is a graph which shows the example of the temperature change of the hot water in the inside of a tank.

<First Embodiment>
The configuration of the heat supply system of the present embodiment will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration of a heat supply system. FIG. 2 is a control block diagram of the heat supply system. As shown in the figure, the heat supply system includes a plurality of heat source devices (a combined heat and power supply device CG and a boiler device 1), a second heat medium supply path 3 as a heat medium forward path, and a second heat medium feedback as a heat medium return path. A path 2, a flow state adjusting device (circulation pump 44 and second pump 33 and on-off valve 6 and on-off valve 7), and a control device C are provided.

The cogeneration device CG includes a cogeneration unit 50 and an exhaust heat recovery unit 20.
The combined heat and power unit 50 is an apparatus that generates heat and electricity together, and has an advantage of high energy efficiency. The cogeneration unit 50 shown in FIG. 1 has an internal combustion engine 52 and a generator 51 driven by the internal combustion engine 52. Therefore, in the combined heat and power unit 50, heat discharged from the engine and electricity output from the generator 51 are generated. The combined heat and power supply unit 50 may have any configuration as long as it can generate heat and electricity together. For example, a device having a fuel cell that can generate heat and electricity can be used as the combined heat and power supply unit 50. Control of the operation of the cogeneration apparatus CG is performed by the control apparatus C described later.

  The boiler device 1 is a device that heats a heat medium by using combustion heat generated by burning fuel, and generally has an advantage of high heat output. Control of the operation of the boiler device 1 is performed by the control device C described later.

  The exhaust heat recovery unit 20 causes the heat exchanger 28 to perform heat exchange between the first heat medium flowing through the first heat medium flow path 23 and the second heat medium flowing through the second heat medium flow path 27. The role of the exhaust heat recovery unit 20 is to recover the heat generated in the combined heat and power supply unit 50 (that is, the heat of the first heat medium) and pass the heat to the second heat medium.

  The exhaust heat recovery unit 20 includes a first heat medium side inlet 21 through which the first heat medium flows, a first heat medium side outlet 22 through which the first heat medium flows out, and a first heat medium through the first heat medium side inlet. The first heat medium flow path 23 that flows from 21 to the first heat medium side outlet 22, the second heat medium side inlet 25 into which the second heat medium flows, and the second heat medium side outlet from which the second heat medium flows out 26, the second heat medium flow path 27 through which the second heat medium flows from the second heat medium side inlet 25 to the second heat medium side outlet 26, the first heat medium flow through the first heat medium flow path 23, and the second heat medium flow path. A heat exchanger 28 that exchanges heat with the second heat medium flowing through the two heat medium flow paths 27, an expansion tank 29 that absorbs the volume change of the first heat medium, a bypass flow path 24, and a mixer 34. Prepare. Preferably, the exhaust heat recovery unit 20 includes an outer container, and the first heat medium side inlet 21, the first heat medium side outlet 22, the second heat medium side inlet 25, and the second heat medium side are provided on the surface of the outer container. It has an outlet 26, and has a first heat medium flow path 23, a second heat medium flow path 27, a heat exchanger 28, an expansion tank 29, a bypass flow path 24, and a mixer 34 inside the exterior container. The expansion tank 29 is opened to the atmosphere through the opening 30.

A first heat medium supply path 12 that supplies the first heat medium from the exhaust heat recovery unit 20 to the combined heat and power supply unit 50 is connected to the first heat medium side outlet 22 of the exhaust heat recovery unit 20. Connected to the first heat medium side inlet 21 of the exhaust heat recovery unit 20 is a first heat medium return path 11 through which the first heat medium returns from the combined heat and power supply unit 50 toward the exhaust heat recovery unit 20.
The first heat medium supplied to the cogeneration unit 50 via the first heat medium supply path 12 is heated by the heat discharged from the cogeneration unit 50, and the heated first heat medium is the first heat medium. Return to the exhaust heat recovery unit 20 via the return path 11.

The first heat medium that has flowed into the exhaust heat recovery unit 20 from the first heat medium side inlet 21 flows through the first heat medium flow path 23 through the interior of the exhaust heat recovery unit 20, and the first heat medium side outlet. To 22. In the middle of the first heat medium flow path 23 from the first heat medium side inlet 21 to the first heat medium side outlet 22, a heat exchanger 28, a mixer 34, an expansion tank 29, and a first pump 32 are provided. Provided.
The second heat medium that has flowed into the exhaust heat recovery section 20 from the second heat medium side inlet 25 flows through the second heat medium flow path 27 through the interior of the exhaust heat recovery section 20, and is then supplied to the second heat medium side outlet. 26. A heat exchanger 28 and a second pump 33 are provided in the middle of the second heat medium flow path 27 from the second heat medium side inlet 25 to the second heat medium side outlet 26.
Control of the operation of the first pump 32 and the second pump 33 is performed by the control device C described later.

  The exhaust heat recovery unit 20 of the present embodiment includes a bypass channel 24 that flows the first heat medium so as to bypass the heat exchanger 28 in the middle of the first heat medium channel 23, and a first channel that flows through the bypass channel 24. A mixer 34 for adjusting the ratio between the flow rate of the heat medium and the flow rate of the first heat medium flowing through the heat exchanger 28 is provided. Specifically, the bypass flow path 24 branches from the branch part 31 in the middle of the first heat medium flow path 23, and the first heat medium flowing through the first heat medium flow path 23 is bypassed to the heat exchanger 28. Let it flow.

A second heat medium supply path for supplying a relatively high temperature second heat medium from the exhaust heat recovery unit 20 to the hot water storage device 16 and the heating device 15 at the second heat medium side outlet 26 of the exhaust heat recovery unit 20. 3 is connected. A second heat medium return path through which a relatively low temperature second heat medium returns from the hot water storage device 16 and the heating device 15 toward the exhaust heat recovery unit 20 at the second heat medium side inlet 25 of the exhaust heat recovery unit 20. 2 are connected.
The boiler device 1 is also connected to the second heat medium supply path 3 and the second heat medium return path 2. Specifically, the exhaust heat recovery unit 20 and the boiler device 1 are respectively supplied with the second heat medium branched at the branch part 4 in the middle of the second heat medium return path 2. From the exhaust heat recovery part 20 and the boiler device 1, the second heat medium joins at the joining part 5 in the middle of the second heat medium supply path 3. The second heat medium is supplied to the hot water storage device 16 and the heating device 15 that use the heat held by the second heat medium via the second heat medium supply path 3, and the hot water storage device 16 and the heating device are supplied. The second heat medium after the heat is used by 15 returns via the second heat medium return path 2. A circulation pump 44 is provided in the middle of the second heat medium supply path 3. Control of the operation of the circulation pump 44 is performed by the control device C described later.

  As described above, the exhaust heat recovery unit 20 and the boiler device 1 are provided in parallel to the second heat medium supply path 3 and the second heat medium return path 2. That is, the heat generated in the combined heat and power unit 50 is transferred to the second heat medium via the exhaust heat recovery unit 20, and the heat is supplied to the hot water storage device 16 and the heating device 15 without passing through the boiler device 1. . Similarly, the heat generated in the boiler device 1 is transferred to the second heat medium, and the heat is supplied to the hot water storage device 16 and the heating device 15 without passing through the exhaust heat recovery unit 20. Then, the relatively low-temperature second heat medium supplied from the hot water storage device 16 and the heating device 15 flows into the exhaust heat recovery unit 20 and the boiler device 1, and in the exhaust heat recovery unit 20 and the boiler device 1, Since the low-temperature second heat medium is heated, the second heat medium can recover a large amount of heat from the exhaust heat recovery unit 20 and the boiler device 1.

  The mixer 34 of the present embodiment is provided at a joining portion of the bypass flow path 24 and the first heat medium flow path 23, and the flow rate of the first heat medium flowing through the bypass flow path 24 and the first flow through the heat exchanger 28. Both are mixed by adjusting the ratio with the flow rate of the heat medium. In the present embodiment, a temperature-sensitive three-way valve is used as the mixer 34. In other words, the mixer 34 detects the temperature of the first heat medium after merging and adjusts the open / closed state of the flow path so that the temperature of the first heat medium after merging approaches the predetermined temperature. It automatically operates so as to adjust the ratio between the flow rate of the first heat medium flowing through the flow path 24 and the flow rate of the first heat medium flowing through the heat exchanger 28.

  For example, at the start of operation of the combined heat and power unit 50, the temperature of the first heat medium supplied from the combined heat and power unit 50 to the first heat medium side inlet 21 is also low, so the first after mixing by the mixer 34 The temperature of the heat medium is also low. At this time, in the mixer 34, most of the first heat medium is allowed to flow to the high temperature side (the bypass channel 24 side). The temperature of the first heat medium supplied from the combined heat and power supply unit 50 to the first heat medium side inlet 21 rises, and the temperature of the first heat medium after being mixed by the mixer 34 approaches the predetermined temperature. In the mixer 34, the flow rate of the first heat medium flowing through the low temperature side (the heat exchanger 28 side) is gradually increased, and the flow rate of the first heat medium flowing through the high temperature side (the bypass channel 24 side) is gradually decreased. Let Thereafter, when the temperature of the first heat medium after being mixed by the mixer 34 exceeds a predetermined temperature, the mixer 34 increases the low temperature side (heat exchanger 28 side) so as to lower the temperature.

  As described above, in the mixer 34, the flow rate of the first heat medium on only one of the high temperature side (the bypass channel 24 side) and the low temperature side (the heat exchanger 28 side) is not changed, but both flow rates are changed. By changing the ratio of the flow rate of the first heat medium flowing through the high temperature side (the bypass channel 24 side) and the flow rate of the first heat medium flowing through the low temperature side (the heat exchanger 28 side), It automatically operates so that the temperature of the first heat medium approaches a predetermined temperature. As a result, the temperature of the first heat medium that flows out of the exhaust heat recovery unit 20 and is supplied to the combined heat and power supply unit 50 approaches the predetermined temperature. And the 1st heat medium (cooling water) which exists in the appropriate temperature range near the said predetermined temperature is continuously supplied to the internal combustion engine 52 of the cogeneration unit 50.

  In addition, a temperature-sensitive three-way valve that can manually change the predetermined temperature can be used as the mixer 34. Thus, when the mixer 34 is configured using a temperature-sensitive three-way valve in which the predetermined temperature is variable, the temperature of the first heat medium flowing out from the mixer 34, that is, exhaust heat recovery. The temperature of the first heat medium flowing out from the first heat medium side outlet 22 of the unit 20 can be changed. That is, the temperature of the first heat medium that flows out of the exhaust heat recovery unit 20 and is supplied to the combined heat and power supply unit 50 can be changed. Therefore, even if the temperature of the first heat medium required by the heat source device (that is, the temperature of the cooling water) is changed by changing the heat source device used in combination with the exhaust heat recovery unit 20, the predetermined temperature is maintained. By changing, the first heat medium close to the temperature required by the heat source device can be supplied from the exhaust heat recovery unit 20 to the heat source device.

  In the present embodiment, the hot water storage device 16 includes a tank 17 for storing hot water and a heat exchange unit 18. A hot water discharge passage 9 through which hot water stored in the tank 17 flows out of the tank 17 is connected to the upper portion of the tank 17. Connected to the lower part of the tank 17 is a water supply path 8 through which water replenished in response to the outflow of hot water from the hot water supply path 9 flows into the tank 17. Water pressure is constantly applied to the hot water in the tank 17 from the water supply path 8. A hot water supply terminal 10 such as a currant or shower is connected to the end of the hot water outlet 9. When the hot water supply terminal 10 is opened, the hot water in the tank 17 is sent to the hot water supply terminal 10 through the hot water outlet 9 by the water pressure applied to the inside of the tank 17.

  The second heat medium flows through the heat exchange unit 18. And in the heat exchange part 18, the heat exchange between the hot water stored in the tank 17 and the 2nd heat medium is performed. That is, in the heat exchanging unit 18, the hot water in the tank 17 is heated and heated using the heat held by the second heat medium.

  As described above, the tank 17 is configured such that hot water is drawn out from the hot water supply passage 9 connected to the upper portion, and at the same time, water is replenished from the water supply passage 8 connected to the lower portion. There is relatively low-temperature hot water around the 8 connection sites. Then, relatively hot water is stored above it.

  The tank 17 is provided with a temperature sensor that detects the temperature of the stored hot water. In the present embodiment, a plurality of temperature sensors are provided in the tank 17, and these temperature sensors are a first temperature sensor 46 as a first temperature detection unit that detects the temperature of hot water stored in the tank 17, and And a second temperature sensor 45 as a second temperature detecting unit for detecting the temperature of the hot water stored in the tank 17 above the portion measured by the first temperature sensor 46. Therefore, the first temperature of the hot water measured by the first temperature sensor 46 is stored relatively lower in the tank 17 of the hot water storage device 16 than the second temperature of the hot water measured by the second temperature sensor 45. It becomes the temperature of hot and cold water. The measurement results of the first temperature sensor 46 and the second temperature sensor 45 are transmitted to the control device C described later. These temperature sensors 45 and 46 can be realized using, for example, a thermocouple or a thermistor.

  Regarding the hot water storage device 16, a temperature increase permission time zone for permitting a temperature rise operation of the hot water stored in the tank 17 of the hot water storage device 16 during one day, and a temperature rise non-permission time zone for not allowing the temperature increase operation. For example, the information is stored in the storage device 47. The temperature increase permission time zone and the temperature increase non-permission time zone are information input by the user of the heat supply system or the like using the input device 48 or information previously set for the hot water storage device 16.

  The heating device 15 is a device that performs heating using the heat of the second heat medium. Specifically, the heating device 15 heats the room by exchanging heat between the second heat medium and the indoor air, that is, by radiating heat of the second heat medium. In the room, a room temperature sensor 49 is provided as a room temperature detection unit that detects the temperature of indoor air that is heated by the heating device 15. The measurement result of the room temperature sensor 49 is transmitted to the control device C described later. The room temperature sensor 49 can be realized using, for example, a thermocouple or a thermistor.

  Regarding the heating device 15, a heating permission time zone in which the operation of the heating device 15 is permitted within one day and a heating non-permission time zone in which the operation is not permitted are set. For example, the information is stored in the storage device 47. Has been. The heating permission time zone and the heating non-permission time zone are information input by the user of the heat supply system or the like using the input device 48 or information previously set for the heating device 15.

The second heat medium supply path 3 branches at the branch portion 13, and the second heat medium is supplied in parallel to the hot water storage device 16 and the heating device 15. That is, the second heat medium having the same temperature is supplied to the hot water storage device 16 and the heating device 15. The second heat medium supply passage 3 between the branching section 13 and the hot water storage device 16 is provided with an on-off valve 6 for opening and closing the passage. The second heat medium supply path 3 between the branching section 13 and the heating device 15 is provided with an on-off valve 7 that opens and closes the flow path.
Further, the second heat medium return path 2 through which the second heat medium after the heat is used in the hot water storage device 16 and the second heat medium feedback through which the second heat medium after the heat is used in the heating device 15 flow. It merges with the path 2 at the junction 14. Control of the operation of the on-off valve 6 and on-off valve 7 is performed by the control device C described later.

  As described above, the flow state of the second heat medium in the second heat medium supply path 3 and the second heat medium return path 2 is adjusted by the circulation pump 44, the second pump 33, the on-off valve 6, and the on-off valve 7. The The circulation pump 44, the second pump 33, the on-off valve 6, and the on-off valve 7 are flow state adjusting devices that adjust the flow state of the second heat medium in the second heat medium supply path 3 and the second heat medium return path 2. Function.

  FIG. 2 is a control block diagram of the heat supply system. As described above, the control device C that controls the operation of the heat supply system includes the cogeneration device CG, the boiler device 1, the first pump 32, the second pump 33, the circulation pump 44, the on-off valve 6, the on-off valve 7, and the like. Control the operation of. Further, the measurement result of the first temperature sensor 46, the measurement result of the second temperature sensor 45, the measurement result of the room temperature sensor 49, and the like are transmitted to the control device C. Information input through the input device 48 is also transmitted to the control device C. Information handled by the control device C such as information transmitted to the control device C can be stored in the storage device 47.

  Next, the timing for operating the combined heat and power supply unit 50 and the exhaust heat recovery unit 20 and the timing for operating the boiler device 1 will be described. FIG. 3 is a diagram illustrating an operation mode of the heat supply system.

Regarding the heating device 15, a heating permission time zone in which the operation of the heating device 15 is permitted within one day and a heating non-permission time zone in which the operation is not permitted are set. For example, the information is stored in the storage device 47. Has been. The heating permission time zone and the heating non-permission time zone are information input by the user of the heat supply system using the input device 48 or information previously determined by the heating device 15.
In the example shown in FIG. 3, the heating permission time zone is 2 hours between 6 o'clock and 8 o'clock and 6 hours between time 16:00 and 22:00, and the other time zones are heating non-permission hours. is there.

Regarding the hot water storage device 16, a temperature increase permission time zone for permitting a temperature rise operation of the hot water stored in the tank 17 of the hot water storage device 16 during one day, and a temperature rise non-permission time zone for not allowing the temperature increase operation. For example, the information is stored in the storage device 47. The temperature increase permission time zone and the temperature increase non-permission time zone are information input by the user of the heat supply system using the input device 48 or information previously determined by the hot water storage device 16.
In the example shown in FIG. 3, 3 hours from 3 o'clock to 6 o'clock and 8 hours from 13 o'clock to 21 o'clock are temperature rise permission time zones, and other time zones are temperature rise non-permission hours. It is a belt.

Regarding the boiler device 1, a boiler permission time zone in which the operation of the boiler device 1 is permitted within one day and a boiler non-permission time zone in which the operation of the boiler device 1 is not permitted are set. For example, the information is stored. It is stored in the device 47. The boiler permission time zone and the boiler non-permission time zone are information input by the user of the heat supply system using the input device 48 or information previously determined by the boiler device 1.
In the example shown in FIG. 3, the boiler allowed time zone is 2 hours from 6 o'clock to 8 o'clock and 6 hours from 16 o'clock to 22 o'clock, and the other time zones are boiler non-permitted time zones. is there.

With regard to the combined heat and power device CG, a combined heat and power permitted time zone during which the operation of the combined heat and power device CG is permitted within one day and a combined heat and power non-permitted time zone during which the operation of the combined heat and power device CG is not permitted are set. The information is stored in the storage device 47. These combined heat and power allowance time zone and non-permitted heat and power time zone are information input by the user of the heat supply system using the input device 48 or information previously determined by the combined heat and power supply device CG.
In the example shown in FIG. 3, 5 hours from 3 o'clock to 8 o'clock and 9 hours from 13 o'clock to 22 o'clock are the cogeneration permitting time zone, and the other time zones are the cogeneration disapproval time It is a belt.

The temperature increase permission time zone has at least one individual temperature increase time zone continuous in time in one day. In the example shown in FIG. 3, two individual temperature increase time zones are set in one day, and one individual temperature increase time zone is 3 hours between time 3 o'clock and time 6 o'clock. The individual heating time period is 8 hours between 13:00 and 21:00.
And the individual temperature rising time zone between the time 3 o'clock and the time 6 o'clock is set so that it overlaps in time with the combined heat and power allowance time zone and does not overlap in time with the boiler permission time zone. As a result, in the individual temperature increase time zone between time 3 o'clock and time 6 o'clock, the temperature increase operation of the hot water storage device 16 can be performed only with the heat generated by the combined heat and power supply device CG. That is, the operation time of the combined heat and power supply device CG can be increased.

  Moreover, as for the individual temperature increase time zone between the time 13:00 and the time 21:00, a partial time zone including the start time (time 13:00 to time 16:00) overlaps with the cogeneration permission time zone in time, and the boiler permission time. It is set so as not to overlap with the belt in time. And the time slot | zone (time 16:00-time 21:00) after the partial time slot | zone is set so that it may overlap with a heat-electric-power supply permission time zone and a boiler permission time zone temporally. As a result, in a partial time zone including the start time (time 13:00 to time 16:00), only the heat previously generated in the combined heat and power supply device CG can be utilized for the temperature increasing operation of the hot water storage device 16. In addition, in the time zone (time from 16:00 to 21:00) after the partial time zone, both the heat generated in the combined heat and power supply device CG and the heat generated in the boiler device 1 are heated up by the hot water storage device 16. It can be utilized. As a result, the heat generated by the combined heat and power supply device CG is used in the temperature raising operation of the hot water storage device 16 with priority in time, and the heat generated in the boiler device 1 can also be utilized in the temperature raising operation of the hot water storage device 16. .

[Hot water storage device 16]
In the heat supply system of the present embodiment, the temperature of hot water stored in the hot water storage device 16 can be increased by the heat generated by the combined heat and power supply device CG. In that case, when the first temperature of the hot water measured by the first temperature sensor 46 is equal to or lower than the first lower limit temperature that permits the temperature raising operation using the thermoelectric supply device CG, the control device C switches the thermoelectric supply device CG. The flow state adjusting device (circulation pump) is operated so that the heat medium circulates between the cogeneration device CG and the hot water storage device 16 through the second heat medium supply path 3 and the second heat medium return path 2. 44, the second pump 33, the on-off valve 6 and the on-off valve 7) are operated to perform a temperature raising operation using the combined heat and power supply device CG. In particular, in the present embodiment, the control device C has a first time of hot water in the tank 17 of the hot water storage device 16 whose temperature is to be increased and the current time is in the temperature increase permission time zone and the cogeneration permission time zone. When the temperature (the temperature of the hot water measured by the first temperature sensor 46) is equal to or lower than the first lower limit temperature permitting the temperature raising operation using the cogeneration device CG, the cogeneration device CG is operated, and the heating medium Is operated by the flow state adjusting device so that it circulates between the heat / electric supply device CG and the hot water storage device 16 through the second heat medium supply passage 3 and the second heat medium return passage 2. Execute the heating operation using. That is, the control device C operates the internal combustion engine 52 and the power generator 51 included in the combined heat and power supply device CG, operates the first pump 32 and the second pump 33 included in the exhaust heat recovery unit 20, and operates the circulation pump 44. Operate and open the on-off valve 6. Thereby, the heat generated in the combined heat and power supply unit 50 is transferred to the first heat medium, and further, the heat held by the first heat medium is transferred to the second heat medium. In addition, the second heat medium is supplied to the heat exchange unit 18 of the hot water storage device 16 through the second heat medium supply path 3, and the temperature of the hot water in the tank 17 is increased.

  The first lower limit temperature is higher than the temperature of water supplied into the tank 17 via the water supply channel 8 and lower than the target temperature of hot water required at the hot water supply terminal 10 connected to the hot water supply channel 9. It is preferable that If it is set as such, the temperature of the water supplied from the water supply channel 8 into the tank 17 is lower than the first lower limit temperature. Therefore, if the water is supplied from the water supply channel 8 into the tank 17, the first temperature Decreases to the first lower limit temperature. And if 1st temperature falls and it becomes 1st minimum temperature, it will heat with respect to the hot water lower than the temperature required in the hot water supply terminal 10 by temperature rising operation using the combined heat and power supply device CG. Can do. In this way, when the first lower limit temperature is set as low as possible, the combined heat and power supply device CG is started after the low temperature water is reliably detected from the bottom of the tank 17 to the first temperature sensor 46. The cogeneration device CG can be continuously operated for a relatively long time. However, if the first lower limit temperature is set too low, the first temperature becomes lower than the first lower limit temperature due to an increase in the water supply temperature in summer and the influence of heat conduction and mixing with the hot water on the upper part of the tank 17. There is a risk that it will not go down. However, such a fear can be avoided by setting the first lower limit temperature higher than the temperature of the water supplied into the tank 17 as in the present embodiment.

  Note that, even if the current time is in the temperature increase permission time zone and the combined heat and power supply time zone, the control device C determines that the first temperature of the hot water measured by the first temperature sensor 46 is higher than the first lower limit temperature. If it is higher, that is, if hot water is still sufficiently hot in the tank 17 of the hot water storage device 16, the temperature raising operation using the combined heat and power supply device CG is not started. Even if the first temperature of the hot water measured by the first temperature sensor 46 is equal to or lower than the first lower limit temperature, that is, even if the temperature of the hot water stored in the tank 17 of the hot water storage device 16 is low, If the time is not in the time zone where the temperature rise permission time zone and the combined heat and power supply time zone overlap (if it is in the temperature rise non-permission time zone or the heat / electricity co-authorization time zone), the temperature rise operation using the cogeneration device CG Do not do.

  In the heat supply system of the present embodiment, the temperature of the hot water stored in the hot water storage device 16 can be increased by the heat generated in the boiler device 1. In that case, the control device C operates the boiler device 1 when the second temperature of the hot water measured by the second temperature sensor 45 is equal to or lower than the second lower limit temperature that permits the temperature raising operation using the boiler device 1. And a fluid state adjusting device (a circulation pump 44 and a first pump) so that the heat medium circulates between the boiler device 1 and the hot water storage device 16 through the second heat medium supply path 3 and the second heat medium return path 2. 2 The temperature raising operation using the boiler device 1 is executed by operating the pump 33, the on-off valve 6 and the on-off valve 7). In particular, in the present embodiment, the control device C has the current time in the temperature rise permission time zone and the boiler permission time zone, and the second temperature of the hot water inside the tank 17 of the hot water storage device 16 to be raised. When (the temperature of the hot water measured by the second temperature sensor 45) is equal to or lower than the second lower limit temperature permitting the temperature raising operation using the boiler device 1, the boiler device 1 is operated, and the heating medium is the second temperature medium. Temperature rise using the boiler device 1 by operating the fluid state adjusting device so as to circulate between the boiler device 1 and the hot water storage device 16 through the heat medium supply path 3 and the second heat medium return path 2. Run the operation. That is, the control device C operates the boiler device 1, operates the circulation pump 44, and opens the on-off valve 6. Thereby, the heat generated in the boiler device 1 is transferred to the second heat medium. In addition, the second heat medium is supplied to the heat exchange unit 18 of the hot water storage device 16 through the second heat medium supply path 3, and the temperature of the hot water in the tank 17 is increased.

  The second lower limit temperature is preferably higher than the target temperature of hot water required at the hot water supply terminal 10 connected to the hot water outlet 9. If it is set as such, it is possible to detect at an early stage that the temperature of the hot water stored in the upper part of the tank 17 has started to decrease, and to start the temperature raising operation by the boiler device 1, such as in a shower. Even in a situation where a large amount of hot water is used, it is possible to reduce the risk of running out of hot water because hot water is lost from the tank 17.

  If the second temperature of the hot water measured by the second temperature sensor 45 is higher than the second lower limit temperature, even if the current time is in the temperature rise permission time zone and the boiler permission time zone, the control device C The temperature raising operation using the boiler device 1 is not started. Even if the second temperature of the hot water measured by the second temperature sensor 45 is equal to or lower than the second lower limit temperature, that is, even if the temperature of the hot water stored in the tank 17 of the hot water storage device 16 is low, Is not in a time zone where the temperature rise permission time zone and the boiler permission time zone overlap (if it is in the temperature rise non-permission time zone or the boiler non-permission time zone), the temperature raising operation using the boiler device 1 is not performed. .

The first temperature measured by the first temperature sensor 46 described above is the temperature of hot water stored relatively below the inside of the tank 17 than the second temperature measured by the second temperature sensor 45. That is, the state in which the relatively low temperature hot water exists in the lower portion of the tank 17 and the relatively high temperature hot water exists in the upper portion of the tank 17 is lower than the second temperature sensor 45 as described above. The temperature sensor 46 is configured to appear first as a drop in the temperature of hot water at the temperature detection site.
In addition, the first lower limit temperature is a temperature lower than the second lower limit temperature. For example, the first lower limit temperature is 35 ° C., and the second lower limit temperature is 50 ° C. As a result, when water is supplied to the tank 17, the second temperature falls below the second lower limit temperature (50 ° C.) when the first temperature falls below the first lower limit temperature (35 ° C.). It can be expected to arrive earlier than the timing. When the timing at which the first temperature becomes equal to or lower than the first lower limit temperature (35 ° C.) comes earlier than the timing at which the second temperature becomes equal to or lower than the second lower limit temperature (50 ° C.), energy efficiency The higher combined heat and power device CG has the advantage that the hot water heating operation is started before the boiler device 1. In addition, when the second temperature is equal to or lower than the second lower limit temperature (50 ° C.), in addition to the combined heat and power supply device CG, the boiler device 1 having a large heat output can be operated to perform the hot water temperature rising operation. .

  The fact that the first lower limit temperature is lower than the second lower limit temperature means that the first lower limit temperature is set to be relatively low and the second lower limit temperature is set to be relatively high. That is. That is, paying attention to the level of the first lower limit temperature that determines the start timing of the combined heat and power device CG, when the first lower limit temperature is lower as in this embodiment, the temperature rise using the combined heat and power device CG There is an advantage that the time required for the hot water temperature (first temperature) in the tank 17 to become high by operation becomes longer. When attention is paid to the level of the second lower limit temperature that determines the start timing of the boiler device 1, the case where the second lower limit temperature is higher as in the present embodiment before the temperature at the upper portion of the tank 17 is greatly reduced. The boiler device 1 is started, and there is an advantage that even if the user uses a large amount of hot water at the hot water supply terminal 10 such as a shower, there is a high possibility that heating by the boiler device 1 is in time.

  Furthermore, in the heat supply system of the present embodiment, if it is desired to perform the temperature raising operation using the combined heat and power supply device CG for a long time, the connection portion of the water supply channel 8 and the first temperature sensor located above the connection portion. The amount of hot water present in the tank 17 with respect to 46 is increased, that is, the connection portion of the water supply path 8 and the installation portion of the first temperature sensor 46 may be set so as to be separated in the vertical direction of the tank 17. . Specifically, an amount of hot water existing in the tank 17 between the connection portion of the water supply path 8 to the tank 17 and the first temperature sensor 46 above the connection portion is output from the combined heat and power supply device CG with a predetermined output. When the temperature is raised from the first lower limit temperature to the first upper limit temperature by performing the temperature raising operation in a state where the water temperature is exerted, the connecting portion of the water supply path 8 It is preferable that an installation site of the first temperature sensor 46 is set. With this setting, there is a period required to raise the amount of hot water existing in the tank 17 between the connection portion of the water supply path 8 and the first temperature sensor 46 from the first lower limit temperature to the first upper limit temperature. , At least over the target period. As a result, the combined heat and power supply device CG can be operated for a long time after being once started.

Even if the current time is in the temperature increase permission time zone and the heat and power cogeneration permission time zone, the control device C is in the inside of the tank 17 of the hot water storage device 16 during the temperature increase operation using the heat and power cogeneration device CG. When the 1st temperature of hot water becomes more than 1st upper limit temperature (for example, 60 degreeC or more), it will be made into the non-permission state which does not permit the temperature rising operation using cogeneration apparatus CG.
Here, there are several methods for stopping the temperature raising operation using the cogeneration device CG when the temperature raising operation using the cogeneration device CG is not permitted.
For example, when the controller C stops the temperature raising operation using the cogeneration device CG, the heat medium circulates between the cogeneration device CG and the hot water storage device 16 while the operation of the cogeneration device CG is continued. For example, the operation control of the flow state adjusting device (circulation pump 44, second pump 33, on-off valve 6, and on-off valve 7) such as closing on-off valve 6 may be performed. In this case, even if the heat medium is heated by operating the combined heat and power supply device CG, the heat medium does not circulate in the hot water storage device 16.
Alternatively, the control device C may stop the temperature raising operation using the cogeneration device CG by stopping the operation of the cogeneration device CG itself. In this case, after stopping the operation of the combined heat and power supply device CG, the flow state adjusting device (the circulation pump 44 and the second pump 33 and the second pump 33 and the Operation control of the on-off valve 6 and the on-off valve 7) may be performed.

In addition, even when the current time is in the temperature rise permission time zone and the boiler permission time zone, the control device C is in the inside of the tank 17 of the hot water storage device 16 during the temperature rise operation using the boiler device 1. When the second temperature of the hot water becomes equal to or higher than the second upper limit temperature (for example, 55 ° C. or higher), the temperature raising operation using the boiler device 1 is not permitted.
Here, there are several methods for stopping the temperature raising operation using the boiler device 1 when the temperature raising operation using the boiler device 1 is not permitted.
For example, when the controller C stops the heating operation using the boiler device 1, the heat medium is not circulated between the boiler device 1 and the hot water storage device 16 while the operation of the boiler device 1 is continued. For example, the operation control of the flow state adjusting device (circulation pump 44, second pump 33, on-off valve 6 and on-off valve 7) such as closing on-off valve 6 may be performed. In this case, even if the heat medium is heated by operating the boiler device 1, the heat medium does not circulate in the hot water storage device 16.
Alternatively, the control device C may stop the temperature raising operation using the boiler device 1 by stopping the operation of the boiler device 1 itself. In this case, after the operation of the boiler device 1 is stopped, the flow state adjusting device (the circulation pump 44, the second pump 33, and the on-off valve is operated so that the heat medium continues to circulate between the boiler device 1 and the hot water storage device 16. 6 and on / off valve 7) may be controlled.

  In the present embodiment, as described above, the first upper limit temperature (60 ° C.) is set to a temperature higher than the first lower limit temperature (35 ° C.), and the second upper limit temperature (55 ° C.) is set to the second lower limit temperature (50 ° C.). ) Higher temperature, the first upper limit temperature (60 ° C.) is set higher than the second upper limit temperature (55 ° C.). Thus, since the first upper limit temperature is set higher than the second upper limit temperature, the second temperature becomes the second upper limit temperature before the first temperature becomes the first upper limit temperature. I can expect that. That is, even if the temperature raising operation is performed using both the combined heat and power supply device CG and the boiler device 1, it can be expected that the boiler device 1 stops first. As a result, the period during which the energy efficient cogeneration apparatus CG is utilized for the hot water temperature rising operation is longer.

Next, the temperature change of the hot water in the tank 17 when the temperature raising operation is performed will be described.
FIG. 4 is a view showing an example of the structure of the tank 17 used for explaining the temperature change of the hot water, and FIG. 5 is a graph showing an example of the temperature change of the hot water inside the tank 17.
As shown in FIG. 4, the volume of the tank 17 used is 148 L (liters). A hot water outlet 9 is connected to the top of the tank 17. The water supply path 8 is connected to the side of the tank 17 at a position where the volume from the top of the tank 17 is 133L. On the side of the tank 17, temperature sensors T1, T2, T3, T4, T5, T6, and T7 are provided. The temperature sensor T1 is provided at a position where the volume from the top of the tank 17 is 33L. The temperature sensor T2 is provided at a position where the volume from the top of the tank 17 is 61L. The temperature sensor T3 is provided at a position where the volume from the top of the tank 17 is 77L. The temperature sensor T4 is provided at a position where the volume from the top of the tank 17 is 93L. The temperature sensor T5 is provided at a position where the volume from the top of the tank 17 is 109L. The temperature sensor T6 is provided at a position where the volume from the top of the tank 17 is 125L. The temperature sensor T7 is provided at a position where the volume from the top of the tank 17 is 137L. In addition, the tank 17 is provided with a heat exchange unit 18 that performs heat exchange between the hot water and the second heat medium. The second heat medium flows into the heat exchange unit 18 through the second heat medium supply path 3, and the second heat medium flows out from the heat exchange unit 18 through the second heat medium return path 2. The second heat medium supply path 3 is connected to a position where the volume from the top of the tank 17 is 83L. The second heat medium return path 2 is connected to a position where the volume from the top of the tank 17 is 131L.
Using the tank 17 having the above structure, the temperature change of the hot water in the tank 17 was measured. The temperature sensor T5 corresponds to the first temperature sensor 46 of the present embodiment, and the temperature sensor T2 corresponds to the second temperature sensor 45 of the present embodiment.

  FIG. 5 shows a temporal change in the temperature (° C.) of hot water measured by each of the temperature sensors T1, T2, T3, T4, T5, T6, and T7, and the outflow amount (L / min of hot water from the outlet channel 9). ), And changes in whether the combined heat and power supply device CG and the boiler device 1 are operating or stopped. Also in the example shown in FIG. 5, the first lower limit temperature is 35 ° C., the first upper limit temperature is 60 ° C., the second lower limit temperature is 50 ° C., and the second upper limit temperature is 55 ° C. When the combined heat and power supply device CG is operating, the exhaust heat recovery unit 20 recovers the heat generated in the combined heat and power supply unit 50 using the first heating medium, and passes the recovered heat to the second heating medium. While the combined heat and power supply device CG is operating in FIG. 5 and the flow rate of the second heat medium in the heat exchange unit 18 is greater than zero, the heat generated in the combined heat and power supply unit 50 is transferred to the hot water in the tank 17. It is.

  More specifically, FIG. 5 shows a flow rate of 2 L / min at about 10:24 with the operation of the combined heat and power supply device CG and the boiler device 1 stopped and the temperature rising operation of the hot water in the tank 17 stopped. When the hot water starts to be continuously discharged from the hot water path 9, the temperature of the hot water in the tank 17 starts to decrease with the inflow of water from the water supply path 8 into the tank 17. At this time, although the temperature drop of hot water appears early in the part close to the water supply path 8 (measurement part of the temperature sensors T5 to T7), the temperature of hot water in the part close to the hot water supply path 9 (measurement part of the temperature sensors T1 to T4) The decline occurs at a very slow rate. That is, it can be seen that the lower the temperature of the tank 17 is, the earlier the temperature drop occurs.

  As the first temperature detected by the temperature sensor T5 (first temperature sensor 46) reaches the first lower limit temperature (35 ° C.) at about 10:47, the temperature raising operation using the combined heat and power supply device CG starts. As a result, the temperature of the hot water in the tank 17 begins to rise. Thereafter, the low temperature hot water stored in the tank 17 moves upward, so that the second temperature detected by the temperature sensor T2 (second temperature sensor 45) becomes the second lower limit temperature at about 11:01. By raising the temperature (50 ° C.), the temperature raising operation using the boiler device 1 is started.

As the second temperature detected by the temperature sensor T2 (second temperature sensor 45) reaches the second upper limit temperature (55 ° C.) at around 11:17, the temperature raising operation using the boiler device 1 is stopped. The Next, at about 11:55, the first temperature detected by the temperature sensor T5 (first temperature sensor 46) becomes the first upper limit temperature (60 ° C.), so that the temperature rise using the combined heat and power supply device CG is performed. Operation is stopped.
As described above, since the first temperature becomes equal to or lower than the first lower limit temperature before the second temperature becomes equal to or lower than the second lower limit temperature, the cogeneration device CG having higher energy efficiency is more preferable than the boiler device 1. First, the hot water heating operation is started. Further, even if the temperature raising operation is performed using both the combined heat and power supply device CG and the boiler device 1, the second temperature becomes the second upper limit temperature before the first temperature becomes the first upper limit temperature. Therefore, the boiler device 1 stops first. As a result, there is an advantage that a period during which the energy efficient combined heat and power supply device CG is used for the hot water temperature rising operation becomes longer.

[Heating device 15]
In the heat supply system of the present embodiment, the temperature of the air by the heating device 15 can be increased by the heat generated by the combined heat and power supply device CG. In that case, in the control device C, the current time is in the heating permission time zone and the cogeneration permission time zone, and the temperature of the air to be heated (the temperature of the air measured by the room temperature sensor 49) is the heating device 15. When the temperature condition for permitting the heating operation is satisfied, that is, when the air temperature is equal to or lower than the third lower limit temperature (for example, 22 ° C.) permitting the heating operation using the combined heat and power supply device CG, The CG is operated, and the flow state adjusting device (the heat medium is circulated between the cogeneration device CG and the heating device 15 through the second heat medium supply path 3 and the second heat medium return path 2). By operating the circulation pump 44, the second pump 33, the on-off valve 6 and the on-off valve 7), the heating operation using the combined heat and power supply device CG is executed. That is, the control device C operates the internal combustion engine 52 and the generator 51 included in the combined heat and power supply unit 50, operates the first pump 32 and the second pump 33 included in the exhaust heat recovery unit 20, and sets the circulation pump 44. Operate and open the on-off valve 7. Thereby, the heat generated in the combined heat and power supply unit 50 is transferred to the first heat medium, and further, the heat held by the first heat medium is transferred to the second heat medium. In addition, the second heat medium is supplied to the heating device 15 through the second heat medium supply path 3, and the heat radiation of the second heat medium (heating) is performed by the heating device 15.

Note that, even if the current time is in the heating permission time zone and the combined heat and power permission time zone, the control device C does not detect the air measured by the room temperature sensor 49 during the heating operation using the combined heat and power device CG. When the temperature satisfies a temperature condition that disallows heating operation using the combined heat and power device CG, that is, the third upper limit temperature that prohibits heating operation using the combined heat and power supply device CG (for example, If it becomes more than 24 degreeC etc., it will transfer to the non-permission state which does not permit the heating operation using cogeneration apparatus CG.
Here, there are several methods as a method of stopping the heating operation using the combined heat and power supply device CG when the heating operation using the combined heat and power supply device CG is not permitted.
For example, when the control device C stops the heating operation using the cogeneration device CG, the heat medium does not circulate between the cogeneration device CG and the heating device 15 while the operation of the cogeneration device CG is continued. Thus, for example, the operation control of the flow state adjusting device (circulation pump 44, second pump 33, on-off valve 6, and on-off valve 7) such as closing on-off valve 7 may be performed. In this case, even if the heat medium is heated by operating the combined heat and power supply device CG, the heat medium does not circulate to the heating device 15.
Alternatively, the control device C may stop the heating operation using the cogeneration device CG by stopping the operation of the cogeneration device CG itself. In this case, after stopping the operation of the combined heat and power supply device CG, the flow condition adjusting device (the circulation pump 44 and the second pump 33 and the second pump 33 and the Operation control of the on-off valve 6 and the on-off valve 7) may be performed.
Further, even if the temperature of the air measured by the room temperature sensor 49 satisfies the above temperature condition, that is, even if the room temperature is low, the current time must be a time zone where the heating permission time zone and the combined heat and power usage time zone overlap. If it is in the heating disapproval time zone or the combined heat and power disapproval time zone, the heating device 15 is not operated.

  In the heat supply system of the present embodiment, the temperature of the air by the heating device 15 can be increased by the heat generated in the boiler device 1. In that case, the control device C has the current time in the heating permission time zone and the boiler permission time zone, and the temperature of the air to be heated (the temperature of the air measured by the room temperature sensor 49) depends on the heating device 15. When the temperature condition permitting the heating operation is satisfied, that is, when the air temperature is equal to or lower than the fourth lower limit temperature (for example, 20 ° C.) permitting the heating operation using the boiler device 1, the boiler device 1 is operated. And the flow condition adjusting device (circulation pump 44 and the circulation pump 44 and so that the heat medium circulates between the boiler device 1 and the heating device 15 through the second heat medium supply path 3 and the second heat medium return path 2. The heating operation using the boiler device 1 is performed by operating the second pump 33, the on-off valve 6, and the on-off valve 7). That is, the control device C operates the boiler device 1, operates the circulation pump 44, and opens the on-off valve 7. Thereby, the heat generated in the boiler device 1 is transferred to the second heat medium. In addition, the second heat medium is supplied to the heating device 15 through the second heat medium supply path 3, and the heat radiation of the second heat medium (heating) is performed by the heating device 15.

  As described above, in the present embodiment, the third lower limit temperature (22 ° C.) is set higher than the fourth lower limit temperature (20 ° C.). That is, even when the current time is in the heating permission time zone, the combined heat and power permission time zone, and the boiler permission time zone, that is, when the combined heat and power supply device CG can be operated depending on the value of the air temperature and the boiler device 1. Even when the air temperature can be operated depending on the value of the air temperature, since the air temperature becomes the third lower limit temperature or less before the air temperature becomes the fourth lower limit temperature or less, the cogeneration device CG is more First used for heating operation.

Note that, even if the current time is in the heating permission time zone and the boiler permission time zone, the control device C does not satisfy the above temperature condition (that is, the air temperature). When the temperature is higher than the fourth lower limit temperature), the heating operation using the boiler device 1 is not started.
Further, even if the temperature of the air measured by the room temperature sensor 49 satisfies the above temperature condition, that is, even if the room temperature is low, the current time is not in a time zone where the heating permission time zone and the boiler permission time zone overlap. The heating operation using the boiler device 1 is not performed (if it is in the heating non-permitted time zone or the boiler non-permitted time zone).

Furthermore, even when the current time is in the heating permission time zone and the boiler permission time zone, the control device C can detect the temperature of the air measured by the room temperature sensor 49 during the heating operation using the boiler device 1. When the temperature condition that disallows the heating operation using the boiler device 1 is satisfied, that is, the air temperature is the fourth upper limit temperature that disallows the heating operation using the boiler device 1 (for example, 21 ° C.). If it becomes above, it will be made to shift to the non-permission state which does not permit heating operation using boiler device 1.
Here, there are several methods for stopping the heating operation using the boiler device 1 when the heating operation using the boiler device 1 is not permitted.
For example, when the control device C stops the heating operation using the boiler device 1, the heat medium is not circulated between the boiler device 1 and the heating device 15 while the operation of the boiler device 1 is continued. For example, the operation control of the flow state adjusting device (circulation pump 44, second pump 33, on-off valve 6, and on-off valve 7) such as closing on-off valve 7 may be performed. In this case, even if the heat medium is heated by operating the boiler device 1, the heat medium does not circulate in the heating device 15.
Alternatively, the control device C may stop the heating operation using the boiler device 1 by stopping the operation of the boiler device 1 itself. In this case, after the operation of the boiler device 1 is stopped, the flow condition adjusting device (the circulation pump 44, the second pump 33, and the on-off valve is operated so that the heat medium continues to circulate between the boiler device 1 and the heating device 15. 6 and on / off valve 7) may be controlled.

  In the present embodiment, the third upper limit temperature (for example, 24 ° C.) is set to a temperature higher than the third lower limit temperature (for example, 22 ° C.), and the fourth upper limit temperature (for example, 21 ° C.) is set to the fourth lower limit temperature (for example, 20 ° C.). Higher temperature). The third upper limit temperature is set to a temperature higher than the fourth upper limit temperature. As a result, the temperature of the air detected by the room temperature sensor 49 becomes the fourth upper limit temperature before the temperature of the air detected by the room temperature sensor 49 reaches the third upper limit temperature. That is, even if the heating operation is executed using both the combined heat and power supply device CG and the boiler device 1, the boiler device 1 stops first. Therefore, the period during which the energy efficient cogeneration apparatus CG is used for heating operation becomes longer.

As described above, the heating permission time zone has at least one individual heating time zone continuous in time in one day. In the example shown in FIG. 3, two individual heating time zones are set in one day, and one individual heating time zone is 2 hours between 6 o'clock and 8 o'clock, and another individual heating time zone. The time zone is 6 hours between 16:00 and 22:00.
And both the individual heating time zone between time 6 o'clock and 8 o'clock and the individual heating time zone between time 16 o'clock and 22:00 are overlapped in time with the combined heat and power allowance time zone and the boiler permission time zone. Is set. As a result, both the heat generated in the combined heat and power supply device CG and the heat generated in the boiler device 1 can be utilized for the heating operation of the heating device 15.

In addition, since the 2nd heat-medium supply path 3 and the 2nd heat-medium return path 2 are shared by the boiler apparatus 1, the cogeneration apparatus CG, the heating apparatus 15, and the hot water storage apparatus 16, the boiler apparatus 1 in the same time slot | zone. When the heating operation of the heating device 15 by the heater and the heating operation of the hot water storage device 16 by the combined heat and power supply device CG are performed, the heating operation of the hot water storage device 16 by the boiler device 1 and the heating operation of the heating device 15 by the combined heat and power supply device CG are performed. Is done unintentionally.
However, in this embodiment, as shown in FIG. 3, the time zone between the time 6 o'clock and the time 8 o'clock when the heating operation of the heating device 15 by the boiler device 1 can be performed is that of the hot water storage device 16 by the combined heat and power supply device CG. It is set so that it does not overlap in time with the time zone between 3 o'clock and 6 o'clock at which the temperature raising operation can be performed. As a result, when the heating operation of the heating device 15 and the temperature increase operation of the hot water storage device 16 by the combined heat and power supply device CG are performed unintentionally, the temperature increase operation of the hot water storage device 16 by the boiler device 1 or the combined heat and power supply device CG. Thus, the heating operation of the heating device 15 can be avoided.

  However, in the time period between time 16:00 and time 21:00 shown in FIG. 3, all of hot water storage operation and heating operation using the combined heat and power supply device CG and hot water storage operation and heating operation using the boiler device 1 can be permitted. There is also a possibility that unintentional hot water storage operation or heating operation as described above may be performed. In such a case, the control device C allows the unintended hot water storage operation and heating operation to be performed while performing the following control.

  Specifically, in the same manner as described above, the control device C determines that the temperature of the air detected by the room temperature sensor (room temperature detection unit) 49 is the third upper limit during the heating operation using the combined heat and power supply device CG. When the temperature exceeds the temperature, the air temperature detected by the room temperature sensor 49 is set to the fourth temperature while the heating operation using the cogeneration device CG is not permitted and the heating operation using the boiler device 1 is performed. When the first temperature becomes equal to or higher than the first upper limit temperature while the heating operation using the boiler device 1 is not permitted and the temperature increasing operation using the combined heat and power supply device CG is performed when the upper temperature is exceeded. If the second temperature is equal to or higher than the second upper limit temperature while the temperature rising operation using the cogeneration device CG is not permitted and the temperature increasing operation using the boiler device 1 is being performed, the boiler device 1 is Ascent used It is disallowed state that does not allow the operation. Here, the third upper limit temperature is set higher than the third lower limit temperature, the fourth upper limit temperature is set higher than the fourth lower limit temperature, and the third upper limit temperature is set higher than the fourth upper limit temperature. The first upper limit temperature is set higher than the first lower limit temperature, the second upper limit temperature is set higher than the second lower limit temperature, and the first upper limit temperature is set higher than the second upper limit temperature. ing.

  In addition, the control device C flows so that the heat medium circulates through the hot water storage device 16 when performing at least one of the temperature raising operation using the cogeneration device CG and the temperature raising operation using the boiler device 1. When both the temperature raising operation using the cogeneration device CG and the temperature raising operation using the boiler device 1 are not permitted, the heat medium does not circulate through the hot water storage device 16 when the state adjusting device is operated. When the flow state adjusting device is operated and at least one of the heating operation using the combined heat and power supply device CG and the heating operation using the boiler device 1 is executed, the heat medium is circulated through the heating device 15. When both the heating operation using the cogeneration device CG and the heating operation using the boiler device 1 are in the disapproved state, the heating medium is used as the heating device. 5 operates the flow conditioning device so as not to circulate through.

  As described above, the heating medium passes through the hot water storage device 16 just because the temperature raising operation using the combined heat and power supply device CG is not permitted or the temperature raising operation using the boiler device 1 is not permitted. When the flow state adjusting device is not operated so as not to circulate, both the temperature raising operation using the combined heat and power supply device CG and the temperature raising operation using the boiler device 1 are not permitted. The flow state adjusting device is operated so that the water does not circulate through the hot water storage device 16. Moreover, the heating medium using the combined heat and power supply device CG is not permitted or the heating operation using the boiler device 1 is not permitted so that the heat medium does not circulate through the heating device 15. The heating medium passes through the heating device 15 when both the heating operation using the cogeneration device CG and the heating operation using the boiler device 1 are not permitted. The flow condition adjusting device is operated so as not to circulate.

Further, when executing at least one of the heating operation and the heating operation using the combined heat and power supply device CG, the control device C operates the combined heat and power supply device CG and performs the heating operation and heating using the combined heat and power supply device CG. When both of the operations are not permitted, the cogeneration device CG is stopped, and when at least one of the heating operation and the heating operation using the boiler device 1 is performed, the boiler device 1 is operated, and When both the heating operation and the heating operation using the boiler device 1 are not permitted, the boiler device 1 is stopped. Thus, just because one of the heating operation and the heating operation using the combined heat and power supply device CG is not permitted, the operation of the combined heat and power supply device CG is not stopped. The combined heat and power supply device CG is stopped after both the temperature raising operation and the heating operation used are not permitted. Thereby, the temperature raising operation and heating operation using the combined heat and power supply device CG can be reliably executed.
Further, when at least one of the temperature raising operation and the heating operation using the boiler device 1 is executed, the boiler device 1 is operated, and both the temperature raising operation and the heating operation using the boiler device 1 are not permitted. At some point, the boiler device 1 is stopped. That is, the temperature rising operation using the boiler device 1 is not stopped even if either the temperature raising operation using the boiler device 1 or the heating operation is not permitted. The boiler apparatus 1 is stopped after both the heating operation and the heating operation are not permitted. Thereby, the temperature rising operation and heating operation using the boiler apparatus 1 can be performed reliably.

Second Embodiment
The heat supply system of the second embodiment is different from the above embodiment in the timing of performing the temperature raising operation for hot water in the tank 17 by the combined heat and power supply device CG. Although the heat supply system of 2nd Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

  In the present embodiment, in the control device C, the second temperature of the hot water detected by the second temperature sensor 45 is equal to or lower than the second intermediate temperature that is higher than the second lower limit temperature and lower than the first upper limit temperature. When the combined heat and power supply device CG is operated, the fluid state adjusting device is circulated between the combined heat and power supply device CG and the hot water storage device 16 through the second heat medium supply path 3 and the second heat medium return path 2. By operating the (circulation pump 44 and second pump 33 and on-off valve 6 and on-off valve 7), the temperature raising operation using the combined heat and power supply device CG is executed. That is, in the same way as described in the first embodiment, the control device C uses the second temperature sensor in addition to the first temperature of the hot water detected by the first temperature sensor 46 being equal to or lower than the first lower limit temperature. Even when the second temperature of hot water detected at 45 is equal to or lower than the second intermediate temperature, the temperature raising operation using the combined heat and power supply device CG is performed. In addition, when the controller C performs the temperature raising operation using the cogeneration device CG and the first temperature is equal to or higher than the first upper limit temperature that disallows the temperature raising operation using the cogeneration device CG, The temperature raising operation using the combined heat and power supply device CG is shifted to a non-permitted state. For example, the second lower limit temperature is 50 ° C., the second intermediate temperature is 53 ° C., and the first upper limit temperature is 60 ° C.

For example, when the amount of hot water used at the hot water supply terminal 10 is very small, the tank 17 passes for a long time without being heated, and the temperature of the hot water is generally increased by heat radiation from the surface of the tank 17 during that time. May be reduced. In this case, since the low temperature water does not flow into the tank 17 from the water supply path 8, the first temperature measured by the first temperature sensor 46 does not decrease so much. As a result, the first temperature does not fall below the first lower limit temperature, but when the second temperature measured by the second temperature sensor 45 falls below the second lower limit temperature, the heating operation by the combined heat and power supply device CG is performed. However, the temperature raising operation using the boiler device 1 is performed.
Even in such a case, the control device C uses the second temperature sensor 45 so that the temperature raising operation using the cogeneration device CG is started before the temperature raising operation using the boiler device 1. Even when the detected second temperature of the hot water is equal to or lower than the second intermediate temperature, the temperature raising operation using the combined heat and power supply device CG is performed.

  In this way, when the temperature of the hot water decreases in order from the lower side of the tank 17 by replenishing water from the water supply path 8 connected to the lower part of the tank 17, and when the hot water is generated by heat radiation generated in the entire tank 17. In any case where the temperature decreases in the entire tank 17, the second temperature is equal to or lower than the second intermediate temperature before the second temperature measured by the second temperature sensor 46 is equal to or lower than the second lower limit temperature. become. That is, even if the first temperature is not lower than the first lower limit temperature, the temperature raising operation using the combined heat and power supply device CG is performed according to the second temperature being lower than the second intermediate temperature. In particular, before the boiler device 1 starts the temperature raising operation in response to the second temperature becoming equal to or lower than the second lower limit temperature, the combined heat and power supply device corresponding to the second temperature becoming equal to or lower than the second intermediate temperature. The CG starts the temperature raising operation. As a result, even in a situation where the temperature of the hot water decreases throughout the tank 17 due to heat radiation generated in the entire tank 17, the hot water in the tank 17 is preferentially used by using the energy efficient combined heat and power supply device CG. A temperature rising operation can be performed.

  Furthermore, even if the temperature rising operation using the cogeneration device CG is started when the second temperature of the hot water detected by the second temperature sensor 45 is equal to or lower than the second intermediate temperature, the temperature rise using the cogeneration device CG is started. It is considered that the time required for the hot water temperature (first temperature) in the tank 17 to become high due to the temperature operation is not so short. That is, the fact that the second temperature of the hot water detected by the second temperature sensor 45 has become equal to or lower than the second intermediate temperature due to heat radiation generated in the entire tank 17 is, for example, between the lowermost part and the uppermost part of the tank 17. The temperature of the large amount of hot water existing in the tank has decreased (that is, the tank 17 has a relatively large heat capacity available), and the large amount of hot water is heated using the combined heat and power supply device CG. This is because a relatively long time is required for heating by operation.

<Another embodiment>
In the above embodiment, the heat supply system has been described with specific examples, but the configuration thereof can be changed as appropriate.
For example, in the above embodiment, the first lower limit temperature, the first upper limit temperature, the second lower limit temperature, the second lower limit temperature, and the like have been described with specific numerical values, but the above-described numerical values are described for illustrative purposes. It can be changed as appropriate.
In the above embodiment, the first temperature sensor (first temperature detection unit) 46, the second temperature sensor (second temperature detection unit) 45, the room temperature sensor (room temperature detection unit) 49, and the like may be realized by a thermostat. For example, the first temperature detection unit, which is a thermostat, detects that the temperature of hot water stored in the tank 17 is equal to or lower than the first lower limit temperature, and mechanically switches to the on state, so that the temperature is higher than the first lower limit temperature. Is set to mechanically switch to the off state. If it does so, the control apparatus C can know that the 1st temperature detection part which is a thermostat has detected that the temperature of the hot water became below the 1st minimum temperature. Moreover, you may employ | adopt the structure which can change the threshold temperature (for example, 1st minimum temperature mentioned above etc.) which a thermostat switches between an ON state and an OFF state with a manual type dial etc.
In the above embodiment, the mixer 34 may be configured using an electronically controlled three-way mixing valve in which the opening / closing adjustment of the valve is controlled in accordance with the temperature detected by a temperature sensor (not shown), for example. A plurality of such electronically controlled two-way valves may be used.

  INDUSTRIAL APPLICABILITY The present invention can be used for a heat supply system that can efficiently operate a plurality of heat source devices according to the state of the heat utilization device.

1 Boiler device (heat source device)
2 Second heat medium return path (heat medium return path)
3 Second heat medium supply path (heat medium forward path)
6 On-off valve (flow condition adjusting device)
7 On-off valve (flow condition adjusting device)
DESCRIPTION OF SYMBOLS 10 Hot-water supply terminal 11 1st heat-medium return path 12 1st heat-medium supply path 15 Heating apparatus (heat utilization apparatus)
16 Hot water storage device (heat utilization device)
17 Tank 32 First Pump 33 Second Pump (Flow Condition Control Device)
44 Circulation pump (flow condition control device)
45 2nd temperature sensor (2nd temperature detection part)
46 1st temperature sensor (1st temperature detection part)
49 Room temperature sensor C Control device CG Heat and power supply device (heat source device)

Claims (12)

A heat supply system comprising a plurality of heat source devices for heating the heat medium, and supplying the heat medium to a plurality of heat utilization devices utilizing the heat possessed by the heat medium,
A heat medium return path that combines the relatively low-temperature heat medium after heat is used in each of the plurality of heat utilization apparatuses, and supplies the heat medium in parallel to each of the plurality of heat source apparatuses; A heat medium forward path that joins the relatively high-temperature heat medium after being heated in each of the plurality of heat source devices, and supplies the heat medium in parallel to each of the plurality of heat utilization devices; and A flow state adjusting device that adjusts the flow state of the heat medium in the heat medium return path and the heat medium forward path, and a control device that controls operations of the plurality of heat source devices and the flow state adjustment device,
The first heat utilization device of the plurality of heat utilization devices is a hot water storage device having a tank for storing hot water, and heating the hot water in the tank using the heat held by the heat medium,
The second heat utilization device of the plurality of heat utilization devices is a heating device that performs heating using heat held by the heat medium,
The first heat source device of the plurality of heat source devices is a cogeneration device that generates heat and electricity together,
A second heat source device of the plurality of heat source devices is a boiler device that heats the heat medium with combustion heat generated by burning fuel,
A heat exchanging unit is provided inside the tank of the hot water storage device, and the heat exchanging unit stores heat in the tank by exchanging heat between the hot water stored in the tank and the heat medium. The hot water is heated,
A hot water supply passage for allowing hot water stored in the tank to flow out of the tank is connected to an upper portion of the tank of the hot water storage device, and hot water from the hot water supply passage is connected to a lower portion of the tank of the hot water storage device. A water supply channel is connected to allow water to be replenished in response to the outflow of water into the tank,
A first temperature detecting unit for detecting a temperature of the hot water stored in the tank; and a temperature of the hot water stored in the tank above the portion detected by the first temperature detecting unit. A second temperature detection unit,
The controller is
When the first temperature of the hot water detected by the first temperature detection unit is equal to or lower than a first lower limit temperature permitting a temperature raising operation using the heat and power supply device, the heat and power supply device is operated, and the heat By operating the flow condition adjusting device so that a medium circulates between the heat and power supply device and the hot water storage device through the heat medium return path and the heat medium forward path, Perform warm operation,
When the second temperature of the hot water detected by the second temperature detection unit is equal to or lower than a second lower limit temperature that allows a temperature raising operation using the boiler device, the boiler device is operated, and the heating medium is A temperature raising operation using the boiler device is performed by operating the flow state adjusting device so as to circulate between the boiler device and the hot water storage device through the heat medium return path and the heat medium forward path. And
The heat supply system, wherein the first lower limit temperature is a temperature lower than the second lower limit temperature. A temperature increase permission time zone for permitting a temperature rising operation of hot water stored in the tank of the hot water storage device and a temperature increase non-permission time zone for not allowing the temperature increase operation are set during one day. And
A boiler permission time zone in which operation of the boiler device is permitted within one day and a boiler non-permission time zone in which operation of the boiler device is not permitted are set,
A combined heat and power permitted time zone for permitting the operation of the combined heat and power device and a combined heat and power prohibited time period for not permitting the operation of the combined heat and power device are set in one day,
The controller is
When the current time is in the temperature increase permission time zone and the combined heat and power permission time zone and the first temperature is equal to or lower than the first lower limit temperature, the heat and power supply device is operated, and the heating medium Temperature rise using the heat / electricity supply device by operating the flow state adjusting device so that the heat / current supply device circulates between the heat / electricity supply device and the hot water storage device through the heat medium return path and the heat medium return path Run,
When the current time is in the temperature rise permission time zone and the boiler permission time zone, and the second temperature is equal to or lower than the second lower limit temperature, the boiler device is operated, and the heating medium is A temperature raising operation using the boiler device is performed by operating the flow state adjusting device so as to circulate between the boiler device and the hot water storage device through the heat medium return path and the heat medium forward path. The heat supply system according to claim 1. The temperature increase permission time zone has at least one individual temperature increase time zone continuous in time,
The partial time zone including the start time of one of the individual heating time zones is set so as to overlap in time with the cogeneration permit time zone and not to overlap in time with the boiler permission time zone,
The heat supply system according to claim 2, wherein a time zone after the partial time zone is set so as to overlap with the combined heat and power allowance time zone and the boiler permission time zone. The temperature increase permission time zone has at least one individual temperature increase time zone continuous in time,
4. The heat supply according to claim 2, wherein one of the individual temperature raising time zones is set so as to overlap in time with the combined heat and power allowance time zone and not to overlap in time with the boiler permission time zone. system. The heating device includes a room temperature detection unit that detects the temperature of air to be heated,
A boiler permission time zone in which operation of the boiler device is permitted within one day and a boiler non-permission time zone in which operation of the boiler device is not permitted are set,
A combined heat and power permitted time zone for permitting the operation of the combined heat and power device and a combined heat and power prohibited time period for not permitting the operation of the combined heat and power device are set in one day,
A heating permission time zone in which the operation of the heating device is permitted within one day and a heating non-permission time zone in which the operation is not permitted are set,
The controller is
The current time is in the heating permission time zone and the combined heat and power permission time zone, and the temperature of the air detected by the room temperature detection unit permits the heating operation using the combined heat and power supply device. When the following, the heat and power supply device is operated, and the heat medium is circulated between the heat and power supply device and the heating device through the heat medium return path and the heat medium forward path. By operating the state adjustment device, the heating operation using the cogeneration device is performed,
The present time is in the heating permission time zone and the boiler permission time zone, and the temperature of the air detected by the room temperature detection unit is equal to or lower than a fourth lower limit temperature that permits heating operation using the boiler device. At some point, the boiler apparatus is operated, and the flow state adjusting device is circulated between the boiler device and the heating device through the heating medium return path and the heating medium forward path. By operating, heating operation using the boiler device is executed,
The heat supply system according to any one of claims 1 to 4, wherein the third lower limit temperature is set to a temperature higher than the fourth lower limit temperature. The controller is
During the heating operation using the combined heat and power device, when the temperature of the air detected by the room temperature detection unit is equal to or higher than a third upper limit temperature, the heating operation using the combined heat and power device is not permitted. Let
During the heating operation using the boiler device, when the temperature of the air detected by the room temperature detection unit is equal to or higher than a fourth upper limit temperature, the heating operation using the boiler device is not permitted and is not permitted.
The third upper limit temperature is set to a temperature higher than the third lower limit temperature, the fourth upper limit temperature is set to a temperature higher than the fourth lower limit temperature, and the third upper limit temperature is higher than the fourth upper limit temperature. The heat supply system according to claim 5, wherein The controller is
During the temperature raising operation using the combined heat and power device, when the first temperature is equal to or higher than the first upper limit temperature, the temperature rising operation using the combined heat and power device is not allowed and is not permitted.
During the temperature raising operation using the boiler device, when the second temperature is equal to or higher than the second upper limit temperature, the temperature raising operation using the boiler device is not permitted and is not permitted.
The first upper limit temperature is set to a temperature higher than the first lower limit temperature, the second upper limit temperature is set to a temperature higher than the second lower limit temperature, and the first upper limit temperature is higher than the second upper limit temperature. The heat supply system according to any one of claims 1 to 6, wherein the heat supply system is set. The controller is
During the heating operation using the combined heat and power device, when the temperature of the air detected by the room temperature detection unit is equal to or higher than a third upper limit temperature, the heating operation using the combined heat and power device is not permitted. Let
During the heating operation using the boiler device, when the temperature of the air detected by the room temperature detection unit is equal to or higher than a fourth upper limit temperature, the heating operation using the boiler device is not permitted and is not permitted.
During the temperature raising operation using the combined heat and power device, when the first temperature is equal to or higher than the first upper limit temperature, the temperature rising operation using the combined heat and power device is not allowed and is not permitted.
During the temperature raising operation using the boiler device, when the second temperature is equal to or higher than the second upper limit temperature, the temperature raising operation using the boiler device is not permitted and is not permitted.
The third upper limit temperature is set to a temperature higher than the third lower limit temperature, the fourth upper limit temperature is set to a temperature higher than the fourth lower limit temperature, and the third upper limit temperature is higher than the fourth upper limit temperature. Is set to
The first upper limit temperature is set to a temperature higher than the first lower limit temperature, the second upper limit temperature is set to a temperature higher than the second lower limit temperature, and the first upper limit temperature is higher than the second upper limit temperature. Is set to
When performing at least one of a temperature raising operation using the cogeneration device and a temperature raising operation using the boiler device, the flow state adjusting device is operated so that the heat medium circulates through the hot water storage device. And when both the temperature raising operation using the combined heat and power supply device and the temperature raising operation using the boiler device are in the non-permitted state, the flow is prevented so that the heat medium does not circulate through the hot water storage device. Operate the conditioning device,
When performing at least one of a heating operation using the cogeneration device and a heating operation using the boiler device, operating the flow condition adjustment device so that the heat medium circulates through the heating device; and When the heating operation using the combined heat and power unit and the heating operation using the boiler device are both in the non-permitted state, the flow state adjusting device is arranged so that the heating medium does not circulate through the heating device. Make it work,
When performing at least one of the heating operation and heating operation using the combined heat and power device, the combined heat and power device is operated, and both the heating operation and heating operation using the combined heat and power device are not permitted. When it is in a state, the cogeneration device is stopped,
When performing at least one of the heating operation and heating operation using the boiler device, the boiler device is operated, and both the heating operation and heating operation using the boiler device are in the disapproved state. The heat supply system according to claim 5, wherein the boiler device is stopped. The controller is
When the second temperature of the hot water detected by the second temperature detector is equal to or lower than a second intermediate temperature that is higher than the second lower limit temperature and lower than the first upper limit temperature, the cogeneration apparatus is operated. And operating the flow state adjusting device so that the heat medium circulates between the heat / electric supply device and the hot water storage device through the heat medium return path and the heat medium forward path. The heat supply system of Claim 7 or 8 which performs the temperature rising operation using a co-feeder.   An amount of hot water present in the tank between the connection portion of the water supply path to the tank and the first temperature detection unit located above the connection portion is caused to exert a predetermined output from the combined heat and power supply device. When raising the temperature from the first lower limit temperature to the first upper limit temperature by performing the temperature raising operation in a state, the connection portion of the water supply channel and the The heat supply system according to any one of claims 7 to 9, wherein an installation site of the first temperature detection unit is set.   The first lower limit temperature is higher than the temperature of water supplied into the tank via the water supply channel and lower than the target temperature of hot water required at the hot water supply terminal connected to the hot water supply channel. The heat supply system according to any one of claims 1 to 10.   The heat supply system according to any one of claims 1 to 11, wherein the second lower limit temperature is higher than a target temperature of hot water required at a hot water supply terminal connected to the hot water supply passage.

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