JP2008185245A - Compression heat pump device, operation method of compression heat pump device, and cogeneration system - Google Patents

Abstract

Provided is a compression heat pump apparatus that can suppress a decrease in COP while obtaining a high temperature side fluid that can be used for heating, hot water supply, and the like, and a low temperature side fluid that can be used for cooling.
A refrigerant circuit (8) for circulating refrigerant is provided in the order of a compressor (4) for compressing refrigerant, a condensing unit (5) for releasing heat from the refrigerant, an expansion valve (6) for expanding the refrigerant, and an evaporation unit (7) for absorbing heat from the refrigerant. A high-temperature side heat exchange unit 11 that is disposed between the compressor 4 and the condensing unit 5 and enables heat exchange between the refrigerant compressed by the compressor 4 and the high-temperature side fluid, and a refrigerant circuit 8 is provided between the expansion valve 6 and the evaporation unit 7, and a low-temperature side heat exchange unit 12 that enables heat exchange between the refrigerant expanded by the expansion valve 6 and the low-temperature side fluid is provided. ing.
[Selection] Figure 1

Description

  The present invention provides a compression heat pump apparatus provided with a refrigerant circuit that circulates the refrigerant in the order of a compression unit that compresses the refrigerant, a condensing unit that dissipates heat from the refrigerant, an expansion unit that expands the refrigerant, and an evaporation unit that absorbs heat from the refrigerant. The present invention relates to a method for operating the compression heat pump device and a cogeneration system.

The compression heat pump apparatus as described above dissipates heat from the refrigerant compressed in the condensing unit to a high temperature side fluid by performing heat exchange between the refrigerant and the high temperature side fluid in the condensing unit, and The refrigerant which has been expanded by performing heat exchange with the low temperature side fluid and has become low temperature absorbs heat from the low temperature side fluid (see, for example, Patent Document 1). In the compression heat pump device described in Patent Document 1, hot water for hot water heated in a condensing unit is used as hot water for hot water as hot water and hot water for hot water is used for hot water. The temperature is lowered.
Moreover, the high temperature side fluid heated in a condensation part can also be used for heating etc. other than hot water supply, and the low temperature side fluid cooled in an evaporation part can be used for cooling etc.

JP 2004-163037 A

In the conventional compression heat pump device, since the refrigerant and the high-temperature side fluid are heat-exchanged in the condensing unit, the temperature of the refrigerant that has passed through the condensing unit varies depending on the temperature of the high-temperature side fluid supplied to the condensing unit. become. For this reason, when the temperature of the high-temperature fluid supplied to the condensing unit becomes high in summer or the like, the temperature of the refrigerant that has passed through the condensing unit increases, and the temperature of the refrigerant cannot be sufficiently reduced in the condensing unit. is there. Therefore, the temperature of the refrigerant supplied to the evaporation unit increases, and the coefficient of performance indicating the ratio of the refrigeration capacity to the amount of work applied to the compression unit (hereinafter, abbreviated as “COP” (Coefficient of Performance) may decrease. There is.
In addition, since the refrigerant and the low-temperature fluid are heat-exchanged in the evaporator, the temperature of the refrigerant that has passed through the evaporator varies depending on the temperature of the low-temperature fluid supplied to the evaporator. For this reason, when the temperature of the endothermic fluid supplied to the evaporation section is lowered in winter or the like, the temperature of the refrigerant that has passed through the evaporation section decreases, and the temperature of the refrigerant cannot be sufficiently increased in the evaporation section. is there. Therefore, the temperature of the refrigerant supplied to the compression unit is lowered, and COP may be lowered.

  The present invention has been made paying attention to such a point, and its purpose is to obtain a high-temperature side fluid that can be used for heating and hot water supply and a low-temperature side fluid that can be used for cooling and the like. It is in providing the cogeneration system which provided the compression heat pump apparatus which can suppress the fall of COP, the operating method of the compression heat pump apparatus, and the compression heat pump apparatus.

  In order to achieve this object, the first characteristic configuration of the heat pump device according to the present invention includes a compression unit that compresses the refrigerant, a condensing unit that dissipates heat from the refrigerant, an expansion unit that expands the refrigerant, and evaporation that absorbs heat from the refrigerant. In the compression heat pump apparatus provided with the refrigerant circuit for circulating the refrigerant in the order of the parts, the refrigerant circuit is arranged between the compression unit and the condensing unit in the refrigerant circuit, and the refrigerant compressed at the compression unit and the high temperature A high temperature side heat exchanging section that enables heat exchange with the side fluid, and the refrigerant that is disposed between the expansion section and the evaporation section in the refrigerant circuit and expanded in the expansion section. The low temperature side heat exchange part which enables heat exchange between the low temperature side fluid is provided.

That is, the refrigerant that has been compressed by the compression unit and has reached a high temperature is heat-exchanged with the high-temperature side fluid at the high-temperature side heat exchange unit, and then radiated at the condensing unit. In the high temperature side heat exchanging section, heat is exchanged between the compressed high temperature refrigerant and the high temperature side fluid, so that the high temperature side fluid is set to a desired temperature on the high temperature side that can be used for heating or hot water supply. Can do. And since the refrigerant that has passed through the high temperature side heat exchange part is radiated in the condensing part, even if the temperature of the refrigerant that has passed through the high temperature side heat exchange part becomes high, the temperature of the refrigerant is sufficiently increased by the heat radiation in the condensing part. The temperature of the refrigerant supplied to the evaporation unit can be suppressed from increasing.
The refrigerant expanded in the expansion section is heat-exchanged with the low-temperature side fluid in the low-temperature side heat exchange section, and then absorbed in the evaporation section. In the low temperature side heat exchanging section, heat is exchanged between the refrigerant that has been expanded to a low temperature and the low temperature side fluid, so that the low temperature side fluid can be set to a desired temperature on the low temperature side that can be used for cooling or the like. . Then, since the refrigerant that has passed through the low temperature side heat exchange part is absorbed by the evaporation part, even if the temperature of the refrigerant that has passed through the low temperature side heat exchange part becomes low, the temperature of the refrigerant is sufficiently increased by the heat absorption in the evaporation part. It can raise and can suppress that the temperature of the refrigerant | coolant supplied to a compression part becomes low.
From the above, by providing a high temperature side heat exchange part and a low temperature side heat exchange part as a pair, a high temperature side fluid that is a desired temperature on the high temperature side and a low temperature side fluid that is the desired temperature on the low temperature side can be obtained. And it came to be able to provide the compression heat pump apparatus which can suppress the fall of COP.

  The second characteristic configuration of the heat pump device according to the present invention is that the heat storage tank in which the heat storage fluid is stored and the heat storage fluid taken out from the heat storage tank are supplied to the high temperature side heat exchange unit as the high temperature side fluid, and the heat storage tank The heat storage fluid circulation means which circulates the said heat storage fluid in the circulation path in the form returned to this point is provided.

That is, the heat storage fluid circulation means supplies the heat storage fluid taken out from the heat storage tank to the high temperature side heat exchange unit and returns it to the heat storage tank, so that heat exchange is performed between the refrigerant and the heat storage fluid in the high temperature side heat exchange unit. The fluid can be returned to the heat storage tank at a desired temperature on the high temperature side, and heat can be stored in the heat storage tank. And when most of the thermal storage fluid stored in the thermal storage tank is high temperature etc., the temperature of the thermal storage fluid supplied to a high temperature side heat exchange part by a thermal storage fluid circulation means becomes high temperature. Even in such a case, the heat storage fluid can be maintained at a desired temperature on the high temperature side by heat exchange between the refrigerant and the heat storage fluid in the high temperature side heat exchange section. At this time, the temperature of the refrigerant that has passed through the high temperature side heat exchanging unit rises, but heat can be released from the refrigerant in the condensing unit to reduce the temperature of the refrigerant.
Therefore, it is possible to suppress the decrease in COP while performing heat storage in the heat storage tank.

  A first feature configuration of the cogeneration system according to the present invention is the cogeneration system provided with the heat pump device in the second feature configuration and a cogeneration device that generates electric power and heat. An exhaust heat type heating unit that is disposed between a side heat exchange unit and the heat storage tank and heats the heat storage fluid that has passed through the high temperature side heat exchange unit with heat generated by the combined heat and power supply device, and Controls the operation of the power supply unit capable of supplying the electric power generated by the combined heat and power device as the driving power for the compression unit in the compression heat pump device, the operation of the heat storage fluid circulation means, and the operation of the compression heat pump device The operation control means to perform is provided.

That is, the exhaust heat type heating unit heats the heat storage fluid that has passed through the high temperature side heat exchange unit with the heat generated by the combined heat and power supply device, so that the operation control means operates the heat storage fluid circulation means to The heat storage fluid can be heated in the type heating unit to store heat in the heat storage tank. In addition, since the power supply unit can supply the power generated in the combined heat and power supply device as the driving power for the compression unit, the operation control means uses the power supply unit to generate the power generated by the combined heat and power supply unit in the compression unit. It is possible to operate the compression heat pump device by supplying it as the driving power. Therefore, by operating the compression heat pump apparatus using the electric power generated in the combined heat and power supply apparatus, heat exchange between the heat storage fluid and the refrigerant in the high temperature side heat exchange unit can be performed, and the heat storage fluid can be used as desired on the high temperature side. Can be temperature.
Therefore, heat can be stored in the heat storage tank and heat exchange between the heat storage fluid and the refrigerant in the high temperature side heat exchanging portion while effectively saving energy by using heat and electric power generated in the combined heat and power supply device.

  According to a second characteristic configuration of the cogeneration system according to the present invention, the heat storage fluid circulation means allows the heat storage fluid taken out from a lower portion of the heat storage tank to pass in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit. In the form of returning to the upper part of the heat storage tank, the heat storage tank circulation state in which the heat storage fluid is circulated in the circulation path can be switched, and the operation control means is configured to switch the heat storage fluid circulation means to the heat storage tank. Operates in a circulating state, and executes a heat storage operation that operates the compression heat pump device when the power supply unit enters a power supply state in which the power generated by the combined heat and power supply device is supplied as driving power for the compression unit. The point is that it is possible to configure.

That is, when the operation control means executes the heat storage operation, the heat storage fluid taken out from the lower part of the heat storage tank passes through the high temperature side heat exchange part and the exhaust heat type heating part in this order and returns to the upper part of the heat storage tank. . And since the heat storage fluid taken out from the lower part of the heat storage tank is heated by the exhaust heat type heating part and becomes high temperature and returns to the upper part of the heat storage tank, the upper side is hot while using the heat generated in the combined heat and power supply device. In addition, heat storage in the heat storage tank can be performed without disturbing the temperature stratification where the lower side becomes a low temperature as much as possible. In addition, since the operation control means operates the compression heat pump device using the electric power generated in the combined heat and power supply device as the driving power for the compression unit when the power supply state is entered in the heat storage operation, in addition to the exhaust heat type heating unit, The heat storage fluid can be heated also in the high temperature side heat exchanging section, and heat can be stored in the heat storage tank using the electric power generated by the combined heat and power supply device.
Therefore, it is possible to store heat in the heat storage tank while effectively saving heat and power generated by the combined heat and power supply device.

  According to a third characteristic configuration of the cogeneration system according to the present invention, the heat storage fluid circulation means passes the heat storage fluid taken out from a lower part of the heat storage tank in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit. In the form of returning to the upper part of the heat storage tank, the heat storage tank circulation state in which the heat storage fluid is circulated in the circulation path can be switched, and the operation control means is configured to switch the heat storage fluid circulation means to the heat storage tank. It is the point which has comprised so that the surplus heat radiation operation which operates in a circulation state and operates the said compression heat pump apparatus can be performed.

That is, when the operation control means performs the excess heat radiation operation, the heat storage fluid taken out from the lower part of the heat storage tank passes through the high temperature side heat exchange part and the exhaust heat type heating part in this order and returns to the upper part of the heat storage tank. become. When sufficient heat is already stored in the heat storage tank, the heat storage fluid taken out from the lower part of the heat storage tank becomes hotter than the refrigerant supplied to the high temperature side heat exchange section, and the high temperature side heat exchange section Heat is dissipated from the exchange to the refrigerant. At this time, although the temperature of the refrigerant rises by passing through the high temperature side heat exchange unit, heat can be dissipated from the refrigerant in the condensing unit, and the temperature of the refrigerant can be sufficiently reduced.
In this way, since the heat of the heat storage fluid can be dissipated, sufficient heat has already been stored in the heat storage tank, and excess heat generated in the combined heat and power unit or excess heat stored in the heat storage tank is stored. When it is desired to dissipate heat, the operation control means executes the surplus heat dissipating operation, so that surplus heat can be dissipated using the condensing part of the compression heat pump device. Therefore, it is not necessary to provide a radiator such as a radiator, and it is possible to dissipate excess heat while simplifying the configuration.

  The 4th characteristic structure of the cogeneration system which concerns on this invention is the said thermal storage fluid which branched from the said exhaust heat type heating part and the said thermal storage tank in the said circulation path, and passed the said exhaust heat type heating part. A bypass path is provided for bypassing the tank and supplying it to the high temperature side heat exchanging section, and the heat storage fluid circulating means is configured to extract the heat storage fluid taken out from a lower portion of the heat storage tank from the high temperature side heat exchanging section and the exhaust heat heating Bypass passage circulation in which the heat storage fluid is circulated in the circulation path and the bypass path in a form in which at least a part of the heat storage fluid that has passed through the exhaust heat heating section and passed through the exhaust heat heating section is supplied to the bypass path. The operation control means is configured to be operable by switching the heat storage fluid circulation means to the bypass passage circulation state in the surplus heat radiation operation. Located in.

  That is, in the surplus heat radiation operation, the operation control means switches the heat storage fluid circulation means to the bypass path circulation state and operates, so that at least a part of the heat storage fluid that has passed through the exhaust heat heating unit is in the upper part of the heat storage tank. Without being returned to the above, it is supplied to the bypass passage and supplied to the high temperature side heat exchange section as it is. Therefore, since the heat storage fluid having surplus heat that has passed through the exhaust heat type heating unit can be supplied to the high temperature side heat exchange unit without returning to the heat storage tank as much as possible, Heat can be efficiently radiated from the heat storage fluid to the refrigerant at the side heat exchange section.

  According to a fifth characteristic configuration of the cogeneration system according to the present invention, the thermal storage fluid that branches from between the exhaust heat type heating unit and the heat storage tank and passes through the exhaust heat type heating unit in the circulation path is a heating terminal. A heating terminal supply path is provided to return to the heat storage tank, and the heat storage fluid circulation means supplies the heat storage fluid taken out from the upper part of the heat storage tank in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit. A heating terminal that circulates the heat storage fluid in the circulation path and the heating terminal supply path in a form that supplies at least a part of the heat storage fluid that has passed through the exhaust heat type heating unit to the heating terminal supply path The operation control means operates the heat storage fluid circulation means in the heating terminal supply path circulation state, and the power supply unit generates power in the combined heat and power supply device. The power that lies in running configured to be capable of heating operation for operating the compression-type heat pump device and a power supply state for supplying a driving power of the compressing unit.

That is, when the operation control means executes the heating operation, the heat storage fluid taken out from the upper part of the heat storage tank passes in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit, at least a part of which is supplied to the heating terminal It will be supplied to the heating terminal on the road. And the thermal storage fluid supplied to a heating terminal is taken out from the upper part of a thermal storage tank, and is heated by the exhaust-heat type heating part. In addition, in the heating operation, the operation control means operates the compression heat pump device using the electric power generated by the combined heat and power supply device as the driving power for the compression unit when it enters the power supply state, so in addition to the exhaust heat type heating unit, The heat storage fluid can be heated also in the high temperature side heat exchange section. Therefore, the heat storage fluid supplied to the heating terminal is at a high temperature, and the air-conditioning target space can be heated using the high-temperature heat storage fluid.
In this way, in addition to the heat stored in the heat storage tank and the heat generated in the combined heat and power supply device, the air-conditioning target space can be heated while also saving energy by utilizing the power generated in the combined heat and power supply device. .

  The 6th characteristic structure of the cogeneration system which concerns on this invention heats the air of air-conditioning object space with the said thermal storage fluid supplied in the said heating terminal supply path as said heating terminal, and is used for the air of air-conditioning object space. On the other hand, the heat storage fluid supplied in the heating terminal supply path is sprayed to provide an air conditioning terminal capable of adjusting the temperature and humidity of the air in the air conditioning target space.

  In other words, the heating terminal is not just for heating the air-conditioning target space, but is an air-conditioning terminal that can adjust the temperature and humidity of the air in the air-conditioning target space using the heat storage fluid supplied in the heating terminal supply path. Therefore, the air-conditioned space can be air-conditioned into a comfortable space. Moreover, the temperature and humidity of the air in the air-conditioning target space can be adjusted simply by supplying the heat storage fluid to the air-conditioning terminal through the heating terminal supply path. It can be air-conditioned in a comfortable space. Incidentally, since the heat storage fluid is sprayed on the air in the air-conditioning space, for example, when the heat storage fluid is water, the heat storage fluid is replenished by water supply or hot water supply.

  According to a seventh characteristic configuration of the cogeneration system according to the present invention, the low-temperature side fluid that has been heat-exchanged in the low-temperature side heat exchange unit is disposed between the low-temperature side heat exchange unit and the cooling terminal in the low-temperature side fluid circulation path. The cooling control circuit is provided with a cooling terminal circulation means, and the operation control means is configured to execute a cooling operation for operating the compression heat pump device and the cooling terminal circulation means.

  That is, when the operation control means executes the cooling operation, the low temperature side fluid is supplied to the cooling terminal at a low temperature by heat exchange with the refrigerant in the low temperature side heat exchange section. Therefore, in the cooling terminal, the air-conditioning target space can be cooled using the low temperature side fluid that has become low in temperature. Thus, the compression-type heat pump device can be used to cool the air-conditioning target space, and convenience can be improved.

  An eighth characteristic configuration of the cogeneration system according to the present invention is a cooling terminal that divides the heat storage fluid that has branched from the exhaust heat heating unit and the heat storage tank and passed through the exhaust heat heating unit in the circulation path. A cooling terminal supply path is provided to return to the heat storage tank, and the heat storage fluid circulation means passes the heat storage fluid taken out from the heat storage tank in the order of the high temperature side heat exchange section and the exhaust heat type heating section. The cooling terminal supply path that circulates the heat storage fluid in the circulation path and the cooling terminal supply path in a form that supplies at least a part of the heat storage fluid that has passed through the exhaust heat type heating unit to the cooling terminal supply path The cooling terminal is configured to be switched to a circulating state, and the air in the air-conditioning target space is cooled and dehumidified with the low-temperature side fluid supplied in the low-temperature side fluid circulation path, and then in the cooling terminal supply path. Supplied An air conditioning terminal capable of adjusting the temperature and humidity of the air in the air-conditioning target space by heating with the heat storage fluid is provided, and the operation control means is configured to connect the heat storage fluid circulation means to the cooling terminal supply path in the cooling operation. It is the point which is comprised so that it may operate | move in a circulation state.

  That is, when the operation control means operates the heat storage fluid circulation means in the cooling terminal supply path circulation state in the cooling operation, the heat storage fluid taken out from the heat storage tank is in the order of the high temperature side heat exchange part and the exhaust heat type heating part. Passing through, at least a part of the air is supplied to the cooling terminal through the cooling terminal supply path. And the cooling terminal does not simply cool the air-conditioning target space, in addition to the low temperature side fluid supplied in the low temperature side fluid circulation path, using the heat storage fluid supplied in the cooling terminal supply path, Since the air conditioning terminal can freely adjust the temperature and humidity of the air in the air conditioning target space, the air conditioning target space can be air-conditioned into a comfortable space. In addition, the temperature and humidity of the air in the air-conditioning target space can be adjusted simply by supplying the heat storage fluid to the air-conditioning terminal through the cooling terminal supply path. It can be air-conditioned in a comfortable space.

  A ninth characteristic configuration of the cogeneration system according to the present invention is that, in the circulation path, the heat storage fluid that branches from between the exhaust heat type heating unit and the heat storage tank and passes through the exhaust heat type heating unit is thermally consumed. A heat consuming part supply path that returns to the lower part of the heat storage tank is provided, and the heat storage fluid circulation means supplies the heat storage fluid taken out from the upper part of the heat storage tank to the high temperature side heat exchange part, the exhaust heat type The heat storage fluid is circulated in the circulation path and the heat consumption section supply path in a form in which the heat storage fluid that has passed through the heating section and passed through the exhaust heat type heating section is supplied to the heat consumption section supply path. The operation control means operates the heat storage fluid circulation means in the heat consumption part supply path circulation state, and the power supply part is the combined heat and power supply. Electric power generated by the device It lies in running configured to be able to heat consumption operation to actuate the the power supply state to supply the compression-type heat pump device as a driving power of the compressing unit.

That is, when the operation control means executes the heat consumption operation, the heat storage fluid taken out from the upper part of the heat storage tank passes in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit, and in the heat consumption unit supply path. It will be supplied to the heat consuming part. And the thermal storage fluid supplied to a heat consumption part is taken out from the upper part of a thermal storage tank, and is heated by the exhaust-heat type heating part. In addition, in the heat consumption operation, the operation control means operates the compression heat pump device using the electric power generated in the combined heat and power supply device as the driving power for the compression unit when the electric power supply state is entered, so in addition to the exhaust heat type heating unit The heat storage fluid can be heated also in the high temperature side heat exchange section. Therefore, the heat storage fluid supplied to the heat consuming part is at a high temperature, and the heat of the high temperature heat storage fluid can be consumed by the heat consuming part. Then, for example, the hot water supply can be performed by heating the water supply with a high-temperature heat storage fluid in the heat consuming unit, or the hot water in the bathtub can be heated with a high-temperature heat storage fluid.
In this way, in addition to the heat stored in the heat storage tank and the heat generated by the combined heat and power supply device, the heat consumption unit also uses the electric power generated by the combined heat and power supply device to save energy, while the heat consumption section The heat storage fluid can be used for hot water supply or reheating.

  1st characteristic structure of the operating method of the compression heat pump apparatus which concerns on this invention is the order of the compression part which compresses a refrigerant | coolant, the condensation part which thermally radiates from the said refrigerant | coolant, the expansion part which expands the said refrigerant | coolant, and the evaporation part which absorbs heat to the said refrigerant | coolant. In the operation method of the compression heat pump apparatus provided with the refrigerant circuit for circulating the refrigerant, the refrigerant circuit is compressed by the compression unit at a high temperature side heat exchange unit arranged between the compression unit and the condensation unit in the refrigerant circuit. The heat exchange between the refrigerant and the high-temperature side fluid is performed, and the low-temperature side heat exchange unit disposed between the expansion unit and the evaporation unit in the refrigerant circuit is expanded in the expansion unit. The heat exchange is performed between the refrigerant and the low temperature side fluid.

The refrigerant that has been compressed by the compression unit and has reached a high temperature is supplied to the high-temperature side heat exchange unit and heat-exchanged with the high-temperature side fluid, and then is supplied to the condensing unit and radiated. The refrigerant that has passed through the condensing unit is expanded in the expansion unit, and then supplied to the low-temperature side heat exchange unit to exchange heat with the low-temperature side fluid. The refrigerant that has passed through the low temperature side heat exchange unit is supplied to the evaporation unit, absorbs heat, and then is supplied to the compression unit.
When the temperature of the high-temperature side fluid is lower than the temperature of the refrigerant in the high-temperature side heat exchange unit, heat is radiated from the refrigerant to the high-temperature side fluid in the high-temperature side heat exchange unit, and further from the refrigerant in the condensing unit. Heat is dissipated, and the temperature of the refrigerant passing through the condensing part can be sufficiently lowered while heating the high temperature side fluid to the desired temperature on the high temperature side. On the contrary, when the temperature of the high temperature side fluid is higher than the temperature of the refrigerant in the high temperature side heat exchange unit, the refrigerant absorbs heat from the high temperature side fluid in the high temperature side heat exchange unit, and from the refrigerant in the condensation unit. Heat is dissipated, and the temperature of the refrigerant passing through the condensing part can be sufficiently lowered while the high temperature fluid is cooled to the desired temperature on the high temperature side.
In addition, when the temperature of the low-temperature side fluid is higher than the temperature of the refrigerant in the low-temperature side heat exchange unit, the refrigerant absorbs heat from the low-temperature side fluid in the low-temperature side heat exchange unit, and the refrigerant further increases in the evaporation unit. Heat is absorbed, and the temperature of the refrigerant passing through the evaporator can be sufficiently increased while the low temperature side fluid is cooled to the desired temperature on the low temperature side. Conversely, when the temperature of the low-temperature side fluid is lower than the temperature of the refrigerant in the low-temperature side heat exchange unit, heat is radiated from the refrigerant to the low-temperature side fluid in the low-temperature side heat exchange unit, and the refrigerant is Heat is absorbed, and the temperature of the refrigerant passing through the evaporation section can be sufficiently increased while the low-temperature side fluid is heated to the desired temperature on the low-temperature side.
Accordingly, the high temperature side heat exchange section and the low temperature side heat exchange section are provided as a pair, and heat is transferred between the high temperature side heat exchange section and the low temperature side heat exchange section. While the low temperature side fluid which is the low temperature side desired temperature can be obtained, the operating method of the compression heat pump apparatus which can suppress the fall of COP came to be provided.

A cogeneration system provided with a compression heat pump device according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 5, the cogeneration system includes a heat and power supply device 1 that generates electric power and heat, a compression heat pump device 2, and a heat storage tank 3 that can store heat generated by the heat and power supply device 1. And an operation control unit H as an operation control means for controlling the operation is provided.
The cogeneration device 1 includes, for example, a gas engine and a fuel cell that use city gas as fuel, and is configured to generate electric power and heat.

The compression heat pump device 2 includes a compressor 4 as a compression unit that compresses a refrigerant, a condensing unit 5 that radiates heat from the refrigerant, an expansion valve 6 as an expansion unit that expands the refrigerant, and an evaporation unit 7 that absorbs heat from the refrigerant. A refrigerant circuit 8 for circulating the refrigerant is provided. As the refrigerant, for example, R410A is used.
The condensing unit 5 includes a condensing fan 9 that blows outside air, and is configured to radiate heat from the refrigerant to the outside air by heat exchange between the refrigerant and the outside air. Moreover, the evaporation part 7 is provided with the evaporator blower 10 which ventilates external air, and it is comprised so that a refrigerant | coolant may absorb heat from external air by heat exchange with a refrigerant | coolant and external air.

In the refrigerant circuit 8, a high temperature side heat exchange unit 11 that enables heat exchange between the refrigerant compressed by the compressor 4 and the high temperature side fluid is disposed between the compressor 4 and the condensing unit 5. Has been. In the refrigerant circuit 8, a low temperature side heat exchange unit 12 that enables heat exchange between the refrigerant expanded by the expansion valve 6 and the low temperature side fluid is disposed between the expansion valve 6 and the evaporation unit 7. Has been.
Here, the description of “high temperature side” and “low temperature side” means that the heat exchange unit 11 is on the higher temperature side than the heat exchange unit 12 when the heat exchange units 11 and 12 are compared. In the relationship between the refrigerant flowing through the refrigerant circuit 8 and the fluid to be heat exchanged (for example, the heat storage fluid in the high temperature side heat exchange unit 11), the refrigerant is higher than the fluid to be exchanged with heat or the refrigerant. May be lower than the fluid to be heat exchanged, and the temperature relationship may be reversed.

  In the operation method of the compression heat pump device according to the present invention, the refrigerant compressed by the compressor 4 and the high temperature side in the high temperature side heat exchange unit 11 disposed between the compressor 4 and the condensing unit 5 in the refrigerant circuit 8. The refrigerant and the low-temperature side fluid exchanged with the fluid and expanded in the expansion valve 6 in the low-temperature side heat exchange unit 12 disposed between the expansion valve 6 and the evaporation unit 7 in the refrigerant circuit 8. Heat exchange between them.

  In such an operation method of the compression heat pump device, the refrigerant that has been compressed by the compressor 4 and has become high temperature is supplied to the high temperature side heat exchange unit 11 and heat exchanged with the high temperature side fluid. The heat is radiated to the outside air supplied to the condensing unit 5 and blown by the condensing fan 9. The refrigerant that has passed through the condensing unit 5 is expanded by the expansion valve 6 and then supplied to the low temperature side heat exchanging unit 12 to exchange heat with the low temperature side fluid. The refrigerant that has passed through the low-temperature side heat exchanging unit 12 is supplied to the evaporation unit 7, absorbs heat from the atmosphere blown by the evaporation blower 10, and then is supplied to the compressor 4.

  When the temperature of the high-temperature side fluid is lower than the temperature of the refrigerant in the high-temperature side heat exchange unit 11, the high-temperature side heat exchange unit 11 radiates heat from the refrigerant to the high-temperature side fluid, and the condensing unit 5 The heat is further radiated from the refrigerant to the outside air, and the temperature of the refrigerant passing through the condensing unit 5 can be sufficiently lowered while the high temperature side fluid is heated to the desired temperature on the high temperature side. Conversely, when the temperature of the high-temperature side fluid is higher than the temperature of the refrigerant in the high-temperature side heat exchange unit 11, the refrigerant absorbs heat from the high-temperature side fluid in the high-temperature side heat exchange unit 11, and enters the condensing unit 5. Therefore, the temperature of the refrigerant passing through the condensing part can be sufficiently lowered while the high temperature side fluid is cooled to reach the desired temperature on the high temperature side.

Further, when the temperature of the low-temperature side fluid is higher than the temperature of the refrigerant in the low-temperature side heat exchange unit 12, the refrigerant absorbs heat from the low-temperature side fluid in the low-temperature side heat exchange unit 12. The refrigerant further absorbs heat from the atmosphere, and the temperature of the refrigerant passing through the evaporating section 7 can be sufficiently increased while the low temperature side fluid can be cooled to the desired temperature on the low temperature side. On the contrary, when the temperature of the low temperature side fluid is lower than the temperature of the refrigerant in the low temperature side heat exchange unit 12, the low temperature side heat exchange unit 12 dissipates heat from the refrigerant to the low temperature side fluid, Thus, the refrigerant absorbs heat from the atmosphere, and the temperature of the refrigerant passing through the evaporating section can be sufficiently increased while heating the low temperature side fluid to the desired temperature on the low temperature side.
Therefore, it is possible to suppress a decrease in COP in the compression heat pump apparatus 2 while obtaining a high-temperature fluid having a desired temperature on the high-temperature side and a low-temperature fluid having a desired temperature on the low-temperature side.

The heat storage tank 3 stores water as a heat storage fluid 13. The heat storage tank 3 is configured to be able to replenish the heat storage fluid 13 through a heat storage fluid replenishment path 55, and the heat storage fluid replenishment path 55 is provided with a replenishment intermittent valve 56 that intermittently replenishes the heat storage fluid 13. Yes.
And the thermal storage fluid circulation means 17 which circulates the thermal storage fluid 13 in the circulation path 16 with the form which supplies the thermal storage fluid 13 taken out from the thermal storage tank 3 to the high temperature side heat exchange part 11 as a high temperature side fluid, and returns to the thermal storage tank 3 is. Is provided. The heat storage fluid circulation means 17 includes a heat storage fluid circulation pump 18 that circulates the heat storage fluid 13 in the circulation path 16.
Between the high temperature side heat exchange part 11 and the heat storage tank 3 in the circulation direction of the heat storage fluid 13 in the circulation path 16, the heat storage fluid that has passed through the high temperature side heat exchange part 11 with heat generated in the cogeneration apparatus 1. An exhaust heat type heating unit 19 for heating 13 is disposed. Then, the high-temperature exhaust heat fluid that retains the heat generated in the combined heat and power supply device 1 is supplied to the exhaust heat type heating unit 19 through the exhaust heat circulation path 32 by the operation of the exhaust heat circulation pump 31, and the heat storage fluid The heat storage fluid 13 is heated by heat exchange with 13.

  The circulation path 16 is supplied in order from the upstream side in the circulation direction of the heat storage fluid 13 to the circulation flow rate adjustment valve 20, the heat storage fluid circulation pump 18, and the high temperature side heat exchange unit 11 that can adjust the circulation flow rate of the heat storage fluid 13. 1st thermal storage fluid temperature sensor T1 which detects the temperature of the thermal storage fluid 13, the high temperature side heat exchange part 11, the exhaust heat type heating part 19, and the 2nd thermal storage which detects the temperature of the thermal storage fluid 13 which passed the exhaust heat type heating part 19 A fluid temperature sensor T 2, a circulation path interrupting valve 22 that allows intermittent passage of the heat storage fluid 13, and a third heat storage fluid temperature sensor T 3 that detects the temperature of the heat storage fluid 13 that is returned to the upper part of the heat storage tank 3 are provided. Further, in the circulation path 16, the auxiliary heat source flow path 53 that allows the heat storage fluid 13 to flow from between the first heat storage fluid temperature sensor T <b> 1 in the circulation direction of the heat storage fluid 13 and the high temperature side heat exchange unit 11 to the auxiliary heat source machine 23. And an auxiliary heat source adjustment valve 54 for adjusting the flow of the heat storage fluid 13 in the auxiliary heat source flow passage 53. The auxiliary heat source unit 23 is configured to be able to heat the heat storage fluid 13 supplied through the auxiliary heat source flow path 53. The auxiliary heat source flow path 53 is provided so as to return the heat storage fluid 13 heated by the auxiliary heat source unit 23 to the downstream side of the exhaust heat type heating unit 19 in the circulation path 16.

In the circulation path 16, the heat storage fluid 13 that has branched from between the exhaust heat type heating unit 19 and the heat storage tank 3 in the circulation direction of the heat storage fluid 13 and passed through the heat exhaust type heating unit 19 is bypassed in the heat storage tank 3 and is heated to a high temperature. A bypass path 24 that supplies the side heat exchange unit 11 is provided. The bypass path 24 is provided with a bypass path interrupting valve 25 that can freely interrupt the flow of the heat storage fluid 13.
In the circulation path 16, the heat storage branched from the location where the second heat storage fluid temperature sensor T <b> 2 and the location where the circulation path interrupting valve 22 are arranged in the circulation direction of the heat storage fluid 13 and passed through the exhaust heat type heating unit 19. A heating terminal supply path 27 that supplies the fluid 13 to the heating terminal 26 and returns it to the heat storage tank 3 is provided. After this heating terminal supply path 27 branches into a first heating terminal supply path 27a and a second heating terminal supply path 27b, the first heating terminal supply path 27a and the second heating terminal supply path 27b are merged. It is composed. And in the heating terminal supply path 27, the flow of the heat storage fluid 13 is intermittently arranged on the upstream side in the flow direction of the heat storage fluid 13 from the portion branched into the first heating terminal supply path 27a and the second heating terminal supply path 27b. A heating terminal supply path interruption valve 28 is provided. Moreover, the 1st heating terminal supply path 27a is provided with the 1st heating terminal supply path intermittent valve 51 which can interrupt the flow of the thermal storage fluid 13 freely.

As the heating terminal 26, the hot / cold water combined terminal 29 for heating the air-conditioning target space using the heat storage fluid 13 supplied from the air in the air-conditioning target space through the first heating terminal supply path 27a, and the air in the air-conditioning target space Heating is performed with the heat storage fluid 13 supplied through the second heating terminal supply passage 27b, and the heat storage fluid 13 supplied through the second heating terminal supply passage 27b is sprayed onto the air in the air-conditioning target space, thereby air conditioning. An air conditioning terminal 30 capable of adjusting the temperature and humidity of the air in the target space is provided. When the heat storage fluid 13 is sprayed, the heat storage fluid 13 is supplied by the heat storage fluid supply path 55.
The hot water / cold water combined terminal 29 allows the heat storage fluid 13 supplied through the first heating terminal supply passage 27a to flow through a hot water / cold water combined pipe or the like installed on the floor or wall surface of the air conditioning target space. It is configured to heat the space.
The air conditioning terminal 30 is a heating heat exchanger that heats the air in the air-conditioning target space with the air-conditioning ventilation fan 33 that ventilates the air in the air-conditioning target space and the heat storage fluid 13 supplied in the second heating terminal supply path 27b. 34, the hot water spray 35 which sprays the thermal storage fluid 13 with respect to the air of the air-conditioning object space, and is arranged so as to spray the thermal storage fluid 13 to the heating heat exchanger 34, and the thermal storage fluid 13 to the hot water spray 35 A hot water spray interrupting valve 52 for interrupting supply is provided. The air conditioning terminal 30 heats the air in the air-conditioning target space ventilated by the air-conditioning ventilating fan 33 by the heating heat exchanger 34 and humidifies the air in the air-conditioning target space by the hot water spray 35. Is adjusted to the desired temperature and the humidity of the air in the air-conditioning target space is adjusted to the desired humidity.

Cooling terminal circulation means 41 is provided for circulating the low temperature side fluid exchanged in the low temperature side heat exchange section 12 between the low temperature side heat exchange section 12 and the cooling terminal 40 in the low temperature side fluid circulation path 39. Yes. The cooling terminal circulation means 41 includes a cooling terminal circulation pump 42 that circulates the low temperature side fluid in the low temperature side fluid circulation path 39. The low temperature side fluid circulation path 39 is branched and joined so as to supply the low temperature side fluid heat-exchanged by the low temperature side heat exchanging unit 12 to both the hot / cold water combined terminal 29 and the air conditioning terminal 30.
The low temperature side fluid circulation path 39 is provided with a low temperature side fluid bypass path 43 that bypasses the low temperature side heat exchange section 12. The low temperature side fluid bypass passage 43 is provided with a bypass passage flow rate adjusting valve 44 that can intermittently flow the low temperature side fluid and adjust the flow rate of the low temperature side fluid.

As the cooling terminal 40, a hot / cold water combined terminal 29 and an air conditioning terminal 30 are provided.
The hot water / cold water combined terminal 29 allows the low temperature side fluid supplied in the low temperature side fluid circulation path 39 to flow through a hot water / cold water combined pipe or the like installed on the floor or wall surface of the air conditioning target space. Is configured to be cooled.
The air conditioning terminal 30 cools and dehumidifies the air in the air-conditioning target space with the low temperature side fluid supplied through the low temperature side fluid circulation path 39 and then supplies the heating terminal supply path 27 and the second heating terminal supply as the cooling terminal supply path 21. It heats with the thermal storage fluid 13 supplied by the path 27b, and it is comprised so that adjustment of the temperature and humidity of the air of air-conditioning object space is possible. The air conditioning terminal 30 includes a cooling and dehumidifying heat exchanger 45 that cools and dehumidifies the air in the air-conditioning target space with the low-temperature fluid supplied through the low-temperature fluid circulation path 39.

Further, in the circulation path 16, the heat storage fluid 13 branched from the branching point of the heating terminal supply path 27 in the circulation direction of the heat storage fluid 13 and the arrangement point of the circulation path intermittent valve 22 and passed through the exhaust heat type heating unit 19. Is provided to the heat consuming part 36 and returned to the lower part of the heat storage tank 3. The heat consuming part supply path 37 is provided with a heat consuming flow rate adjusting valve 38 that allows the flow of the heat storage fluid 13 to be intermittent and allows the flow rate of the heat storage fluid 13 to be adjusted.
The heat consuming section 36 is a heat exchanger that exchanges heat between the heat storage fluid 13 supplied through the heat consuming section supply passage 37, the water supplied through the water supply passage 46, and the hot water supplied through the bath circulation passage 47. It is. And the heat consumption part 36 is comprised so that the heat which the thermal storage fluid 13 may have may be consumed in order to heat the water supplied in the water supply path 46, and the hot water supplied in the bath circulation path 47. FIG.
The water in the water supply passage 46 heated by the heat consuming unit 36 is configured to supply hot water to a hot water supply location such as a hot water tap through a hot water supply passage 48, and the hot water supply passage 48 detects a hot water supply temperature sensor 49. Is provided. In addition, a bath circulation pump 50 is provided in the bath circulation path 47 so as to circulate hot water in the bathtub.

The heat storage fluid circulation means 17 is a heat storage tank circulation state, a bypass passage circulation state, a heating terminal supply passage circulation state, a cooling terminal supply passage circulation state, and a heat consumption part supply as a circulation state for circulating the heat storage fluid 13 of the heat storage tank 3. It can be switched to each of the road circulation states.
By the way, in FIGS. 1-5, the part into which fluids, such as a refrigerant | coolant and the thermal storage fluid 13, are flowing, is shown by the thick line. 1 to 5, the combined heat and power supply device 1 is operated, and a high-temperature exhaust heat fluid that retains heat generated in the combined heat and power supply device 1 by the operation of the exhaust heat circulation pump 31 is circulated for exhaust heat. The state which is supplying to the exhaust heat type heating part 19 in the path | route 32 and the compression type heat pump apparatus is act | operating is shown.

In the heat storage tank circulation state, as shown in FIG. 1, the heat storage fluid 13 taken out from the lower part of the heat storage tank 3 is passed in the order of the high-temperature side heat exchange unit 11 and the exhaust heat type heating unit 19 in the upper part of the heat storage tank 3. In the returning form, the heat storage fluid 13 is circulated in the circulation path 16.
In the bypass path circulation state, as shown in FIG. 2, the heat storage fluid 13 taken out from the lower portion of the heat storage tank 3 is passed through the high-temperature side heat exchange unit 11 and the exhaust heat type heating unit 19 in this order, and the exhaust heat type heating unit 19. In this embodiment, at least a part of the heat storage fluid 13 that has passed through is supplied to the bypass passage 24, and the heat storage fluid 13 is circulated through the circulation passage 16 and the bypass passage 24.
In the heating terminal supply channel circulation state, as shown in FIG. 3, the heat storage fluid 13 taken out from the upper part of the heat storage tank 3 is passed through the high-temperature side heat exchange unit 11 and the exhaust heat type heating unit 19 in this order to exhaust heat type heating. The heat storage fluid 13 is circulated in the circulation path 16 and the heating terminal supply path 27 in a form in which at least a part of the heat storage fluid 13 that has passed through the section 19 is supplied to the heating terminal supply path 27.
In the cooling terminal supply path circulation state, as shown in FIG. 4, the heat storage fluid 13 taken out from the lower part of the heat storage tank 3 is passed through the high-temperature side heat exchange unit 11 and the exhaust heat type heating unit 19 in this order to exhaust heat type heating. The heat storage fluid 13 is circulated in the circulation path 16 and the cooling terminal supply path 21 in a form in which at least a part of the heat storage fluid 13 that has passed through the section 19 is supplied to the cooling terminal supply path 21.
In the heat consumption part supply path circulation state, as shown in FIG. 5, the heat storage fluid 13 taken out from the upper part of the heat storage tank 3 is passed through the high temperature side heat exchange part 11 and the exhaust heat type heating part 19 in this order, and is exhausted. The heat storage fluid 13 that has passed through the heating unit 19 is supplied to the heat consumption unit supply path 37, and the heat storage fluid 13 is circulated through the circulation path 16 and the heat consumption unit supply path 37.

The power output from the combined heat and power supply device 1 is electrically connected to the drive unit 4a of the compressor 4 in the compression heat pump device 2 through a power supply line 14 so that the power can be supplied. A power supply unit 15 is provided that can supply power generated in the combined heat and power supply device 1 as drive power for the compressor 4. Thus, the compression heat pump device 2 is configured to be operable using the electric power generated in the combined heat and power supply device 1.
Although not shown in the figure, the power supply line 14 is linked to a commercial power supply line, and the power output from the combined heat and power supply apparatus 1 is transmitted to the TV 4 and the refrigerator in addition to the drive unit 4 a of the compressor 4. In addition, it can be supplied to other power loads such as a washing machine.
And the operation control part H compares other electric power loads, such as a television, a refrigerator, and a washing machine, and the electric power which generate | occur | produces in the cogeneration apparatus 1, and supplies electric power so that it may not flow backward into a commercial electric power supply line. The compression heat pump device 2 is configured to operate in a power supply state in which the power output from the cogeneration device 1 is supplied to the drive unit 4a of the compressor 4 at the unit 15.

The operation control unit H controls the operation of the heat storage fluid circulation means 17, the compression heat pump device 2 and the cooling terminal circulation means 41 to perform heat storage operation, excess heat radiation operation, heating operation, cooling operation, and heat consumption operation. Each is configured to be executable.
Hereinafter, each operation will be described.

(Heat storage operation)
When the heat storage fluid 13 stored in the heat storage tank 3 is lower than the set temperature, the operation control unit H operates the heat storage fluid circulation means 17 in the heat storage tank circulation state as shown in FIG. When the power supply unit 15 enters a power supply state in which a part of the electric power (for example, 1 kW) generated in the combined heat and power supply device 1 is supplied as driving power for the compression unit 4, the heat storage operation for operating the compression heat pump device 2 is performed. It is configured.
Then, the operation control unit H opens the circulation flow rate adjustment valve 20 and the circulation path intermittent valve 22, and closes the bypass path intermittent valve 25, the heating terminal supply path intermittent valve 28, and the heat consumption flow rate adjustment valve 38, By operating the heat storage fluid circulation pump 18, the heat storage fluid circulation means 17 is operated in the heat storage tank circulation state. At this time, the operation control unit H adjusts the opening degree of the circulation flow rate adjustment valve 20 so that the temperature detected by the third heat storage fluid temperature sensor T3 becomes the heat storage set temperature.
In addition, when there is a possibility of reverse power flow, the operation control unit H supplies power (for example, 600 W) output from the cogeneration device 1 by the power supply unit 15 to the drive unit 4 a of the compressor 4. As a supply state, the compression heat pump device 2 is operated.

  A heat storage fluid 13 (for example, a temperature of 20 ° C. and a flow rate of 1.2 liters / minute) taken out from the lower portion of the heat storage tank 3 is first supplied to the high temperature side heat exchange unit 11. At this time, when the compression heat pump device 2 is operated, heat is exchanged with the refrigerant in the high temperature side heat exchanging unit 11, and the heat storage fluid 13 is heated to 51 ° C., for example. The exchange heat quantity at this time is 2.59 KW, and the COP is 4.3. The heat storage fluid 13 that has passed through the high temperature side heat exchanging section 11 is supplied to the exhaust heat type heating section 19, exchanged heat with the exhaust heat fluid, and further heated to, for example, 75 ° C. and placed above the heat storage tank 3. Return. At this time, the amount of heat supplied from the combined heat and power supply device 1 is 2 KW.

  In this way, the heat storage fluid 13 taken out from the lower part of the heat storage tank 3 is heated not only by the exhaust heat type heating unit 19 but also by the high temperature side heat exchanging unit 11 while the heat storage fluid 13 can be heated. The heat storage fluid 13 is returned to the upper part of the heat storage tank 2 to store heat in the heat storage tank 3. And the operation control part H will complete | finish heat storage operation, if the temperature of the thermal storage fluid 13 currently stored in the lower part of the thermal storage tank 2 becomes more than preset temperature.

(Excess heat radiation operation)
When the operation control unit H dissipates excessive heat generated in the combined heat and power supply apparatus 1 and excessive heat in the heat storage tank 3, as shown in FIG. 2, the heat storage fluid circulation means 17 is put into a heat storage tank circulation state. And the excessive heat radiation operation for operating the compression heat pump device 2 is executed. The operation control unit H is configured not only to operate the heat storage fluid circulation means 17 in the heat storage tank circulation state, but also to switch the heat storage fluid circulation means 17 to the bypass path circulation state so as to be operable.

  The operation control unit H switches the heat storage fluid circulation means 17 to the bypass path circulation state by opening the bypass path interruption valve 25 in a state where the heat storage fluid circulation means 17 is operated in the heat storage tank circulation state. . At this time, the operation control unit H is configured so that the temperature detected by the first heat storage fluid temperature sensor T1 is equal to or higher than the set temperature for heat dissipation (higher than the refrigerant supplied to the high temperature side heat exchange unit 11). The opening degree of 20 is adjusted.

The heat storage fluid 13 taken out from the lower part of the heat storage tank 3 and the heat storage fluid 13 flowing through the bypass path 24 become equal to or higher than the set temperature for heat dissipation and are supplied to the high temperature side heat exchange unit 11. Heat is exchanged between the heat storage fluid 13 and the refrigerant in the high temperature side heat exchanging section 11 and is radiated from the heat storage fluid 13 to the refrigerant. The heat storage fluid 13 that has passed through the high temperature side heat exchanging section 11 is supplied to the exhaust heat type heating section 19 and is heat-exchanged with the exhaust heat fluid to be heated and returned to the upper part of the heat storage tank 3 or a bypass path. 24 flows.
On the other hand, the refrigerant in the compression heat pump device 2 is heated by heat exchange with the heat storage fluid 13 in the high temperature side heat exchange unit 11. Since the refrigerant that has passed through the high temperature side heat exchange unit 11 is radiated by the condensing unit 5, the temperature of the refrigerant can be sufficiently reduced, and the temperature of the refrigerant supplied to the expansion valve 6 is suppressed from becoming high. it can.
In this way, the heat exchange between the heat storage fluid 13 and the refrigerant in the high temperature side heat exchanging unit 11 and the heat release from the refrigerant in the condensing unit 5 cause excess heat generated in the combined heat and power supply device 1 and surplus in the heat storage tank 3. Heat can be dissipated.

(Heating operation)
As shown in FIG. 3, the operation control unit H is configured to store a heat storage fluid when heating the air-conditioning target space with the hot / cold water combined terminal 29 and when heating and humidifying the air in the air-conditioning target space with the air-conditioning terminal 30. The circulation means 17 is operated in a heating terminal supply path circulation state, and a heating operation for operating the compression heat pump device 2 is performed when the power supply state is reached.
Then, the operation control unit H opens the circulation flow rate adjustment valve 20, the circulation path intermittent valve 22, the bypass path intermittent valve 25, the heating terminal supply path intermittent valve 28, and the first heating terminal supply path intermittent valve 51, and heat consumption. By closing the flow rate adjusting valve 38 and operating the heat storage fluid circulation pump 18, the heat storage fluid circulation means 17 is operated in the heating terminal supply path circulation state. At this time, the operation control unit H is configured to adjust the opening degree of the circulation flow rate adjustment valve 20 so that the temperature detected by the second heat storage fluid temperature sensor T2 becomes the heating set temperature (for example, 60 ° C.). Yes.

The heat storage fluid 13 taken out from the upper part of the heat storage tank 3 is first supplied to the high temperature side heat exchange unit 11. At this time, when the compression heat pump device 2 is operated, the heat storage fluid 13 is heated by heat exchange between the heat storage fluid 13 and the refrigerant in the high temperature side heat exchange unit 11. The heat storage fluid 13 that has passed through the high temperature side heat exchanging section 11 is supplied to the exhaust heat type heating section 19 and is heated by exchanging heat with the exhaust heat fluid. Then, at least a part of the heat storage fluid 13 that has passed through the exhaust heat type heating unit 19 flows through the heating terminal supply path 27 and is supplied to the hot / cold water combined terminal 29 and the air conditioning terminal 30. The heat storage fluid 13 that has passed through the hot / cold water combined terminal 29 and the air conditioning terminal 30 is supplied to the high temperature side heat exchange unit 11 without returning to the lower part of the heat storage tank 2 or returning to the lower part of the heat storage tank 2. In this way, the heat storage fluid 13 that has passed through the hot / cold water combined terminal 29 and the air conditioning terminal 30 is supplied to the high temperature side heat exchange unit 11 without returning to the heat storage tank 3, thereby disturbing the temperature stratification of the heat storage tank 3 as much as possible. The heat stored in the heat storage fluid 13 that has passed through the hot / cold water combined terminal 29 and the air conditioning terminal 30 can be effectively utilized.
Further, at least a part of the heat storage fluid 13 that has passed through the exhaust heat type heating unit 19 flows through the heating terminal supply path 27, but the remaining part flows through the bypass path 24 from the circulation path 16 to a high temperature. It is supplied to the side heat exchange unit 11. Therefore, the heat of the heat storage fluid 13 can be effectively utilized by supplying the heat storage fluid 13 that has passed the exhaust heat type heating unit 19 and has reached a high temperature to the high temperature side heat exchange unit 11 as it is.

  The hot / cold water combined terminal 29 heats the air-conditioning target space using the regenerative fluid 13 having the set temperature for heating supplied through the first heating terminal supply path 27a. The air conditioning terminal 30 supplies the heat storage fluid 13 at the set temperature for heating to the heat exchanger 34 for heating and the hot water spray 35 through the second heating terminal supply path 27b with the hot water spray intermittent valve 52 opened. Then, the air conditioning terminal 30 operates the air-conditioning ventilation fan 33 to heat the air in the air-conditioning target space ventilated by the air-conditioning ventilation fan 33 using the heating heat exchanger 34 and humidify it using the hot water spray 35. Thus, the temperature of the air in the air-conditioning target space is adjusted to a desired temperature, and the humidity of the air in the air-conditioning target space is adjusted to the desired humidity.

(Cooling operation)
As shown in FIG. 4, the operation control unit H compresses the air-conditioning target space with the hot / cold water combined terminal 29 and when the air-conditioning terminal 30 cools and dehumidifies the air in the air-conditioning target space, as shown in FIG. A cooling operation for operating the heat pump device 2 and the cooling terminal circulation means 41 is executed.
And the operation control part H is comprised so that the thermal storage fluid circulation means 17 may be operated in a cooling terminal supply path circulation state in addition to operating the compression heat pump apparatus 2 and the cooling terminal circulation means 41.

The operation control unit H operates the cooling terminal circulation means 41 by the operation of the cooling terminal circulation pump 42, and causes the low-temperature side fluid circulation path 39 to supply the low-temperature side fluid to the low-temperature side heat exchange unit 12 and the hot / cold water combined terminal 29. And circulation between the air conditioning terminal 30. And since the operation control part H is operating the compression heat pump apparatus 2, in the low temperature side heat exchange part 12, it cools a low temperature side fluid to the desired temperature of a low temperature side by heat exchange with a low temperature side fluid and a refrigerant | coolant. The low temperature side fluid is supplied to the hot / cold water combined terminal 29 and the air conditioning terminal 30. At this time, the operation control unit H is configured to adjust the temperature of the low temperature side fluid supplied to the hot / cold water combined terminal 29 and the air conditioning terminal 30 by adjusting the opening degree of the bypass passage flow rate adjusting valve 44. ing.
And since the low temperature side fluid cooled by the low temperature side heat exchange part 12 is supplied in the low temperature side fluid circulation path 39, the hot water / cold water combined terminal 29 cools the air-conditioning target space with the low temperature side fluid. .

  The operation control unit H opens the circulation flow rate adjusting valve 20, the circulation path intermittent valve 22, the bypass path intermittent valve 25, and the heating terminal supply path intermittent valve 28, and opens the first heating terminal supply path intermittent valve 51 and the heat consumption passage. By closing the flow rate adjustment valve 38 and operating the heat storage fluid circulation pump 18, the heat storage fluid circulation means 17 is operated in the cooling terminal supply path circulation state.

The heat storage fluid 13 taken out from the lower part of the heat storage tank 3 and the heat storage fluid 13 flowing through the bypass path 24 are supplied to the high temperature side heat exchange unit 11 and exchanged heat with the refrigerant. The heat storage fluid 13 that has passed through the high temperature side heat exchanging section 11 is supplied to the exhaust heat type heating section 19 and is heated by exchanging heat with the exhaust heat fluid. Then, at least a part of the heat storage fluid 13 that has passed through the exhaust heat type heating unit 19 flows through the cooling terminal supply path 21 and is supplied to the air conditioning terminal 30. The heat storage fluid 13 that has passed through the air conditioning terminal 30 is supplied to the high temperature side heat exchange unit 11 without returning to the lower part of the heat storage tank 2 or returning to the lower part of the heat storage tank 2. Incidentally, since the cooling terminal supply path 21 communicates with the first heating terminal supply path 27a, a part of the heat storage fluid 13 may flow to the first heating terminal supply path 27a. However, the low temperature side fluid flows through the second heating terminal supply path 27b by the operation of the cooling terminal circulation pump 42, and the first heating terminal supply path intermittent valve 51 is closed, so that the heat storage fluid 13 is Even if it flows somewhat to the 1 heating terminal supply path 27a, most of the heat storage fluid 13 flows through the second heating terminal 27b and is supplied to the air conditioning terminal 30. In addition, by installing an opening / closing valve such as the first heating terminal supply path intermittent valve 51 in the upstream end portion of the first heating terminal supply path 27a and closing the opening / closing valve, The flow to the 1 heating terminal supply path 27a can also be prevented.
Further, at least a part of the heat storage fluid 13 that has passed through the exhaust heat type heating unit 19 flows through the cooling terminal supply path 21, but the remaining part flows from the circulation path 16 through the bypass path 24 or Return to the top of the heat storage tank 3.

  In the air conditioning terminal 30, the low temperature side fluid cooled by the low temperature side heat exchange unit 12 is supplied to the cooling / dehumidification heat exchanger 45 through the low temperature side fluid circulation path 39 and the hot water spray intermittent valve 52 is closed. As described above, the heat storage fluid 13 is supplied to the heating heat exchanger 34 in the cooling terminal supply path 21. The air conditioning terminal 30 operates the air-conditioning ventilation fan 33 to cool and dehumidify the air in the air-conditioning target space ventilated by the air-conditioning ventilation fan 33 with the low-temperature fluid in the heat exchanger 45 for cooling and dehumidification. It heats with the thermal storage fluid 13 in the heat exchanger 34, and adjusts the temperature of the air of air-conditioning object space to desired temperature, and the humidity of the air of air-conditioning object space to desired humidity.

(Heat consumption operation)
The operation control unit H operates the heat storage fluid circulation means 17 in the heat consumption unit supply path circulation state as shown in FIG. 5 when supplying hot water to a hot water supply place and pursuing hot water in a bathtub, When the electric power is supplied, the heat consumption operation for operating the compression heat pump device 2 is executed.
The operation control unit H opens the circulation flow rate adjustment valve 20, the bypass passage interruption valve 25, and the heat consumption flow adjustment valve 38, and supplies the circulation passage interruption valve 22, the heating terminal supply passage interruption valve 28, and the first heating terminal supply. The heat storage fluid circulation means 17 is operated in the heat consumption part supply path circulation state by operating the heat storage fluid circulation pump 18 with the path interruption valve 51 closed. At this time, the operation control unit H sets the opening of the circulation flow rate adjustment valve 20 to, for example, 15 liters / minute so that the temperature detected by the first heat storage fluid temperature sensor T1 becomes a set temperature (for example, 55 ° C.). adjust. In addition, when supplying hot water to the hot water supply portion, the operation control unit H adjusts the opening degree of the heat consumption flow rate adjusting valve 38 so that the temperature detected by the hot water supply temperature sensor 49 becomes the hot water supply set temperature.

  The heat storage fluid 13 taken out from the upper part of the heat storage tank 3 is first supplied to the high temperature side heat exchange unit 11. At this time, when the compression heat pump device 2 is operated, heat is exchanged between the heat storage fluid 13 and the refrigerant in the high temperature side heat exchange unit 11, and the heat storage fluid 13 is heated to, for example, 56.8 ° C. The heat storage fluid 13 that has passed through the high temperature side heat exchanging section 11 is supplied to the exhaust heat type heating section 19, exchanged with the exhaust heat fluid, and heated to 58.7 ° C., for example. Then, the heat storage fluid 13 that has passed through the exhaust heat type heating unit 19 flows through the heat consumption unit supply path 37 and is supplied to the heat consumption unit 36 to be consumed. That is, when hot water is supplied to a hot water supply location, the heat is consumed by heating the water by heat exchange with water supplied through the water supply passage 46 in the heat consuming section 36. Further, when chasing the hot water in the bathtub, the hot water supplied from the bath circulation path 47 is heated in the heat consuming section 36 to be consumed by heat. In this way, the heat storage fluid 13 that has been heat consumed by the heat consuming unit 36 returns to the lower part of the heat storage tank 3.

When hot water is supplied to a hot water supply location, the water supplied in the water supply passage 46 is heated in the heat consuming section 36, and the heated hot water is supplied as hot water in the hot water supply passage 48 to the hot water supply location.
When chasing the hot water in the bathtub, the operation control unit H operates the bath circulation pump 50 to supply the hot water in the bathtub to the heat consuming unit 36 through the bath circulation path 47. And the hot water of the bathtub heated in the heat consumption part 36 returns to the bathtub in the bath circulation path 47.

[Another embodiment]
(1) In the above embodiment, the operation control unit H performs each of the heat storage operation, the surplus heat radiation operation, the heating operation, the cooling operation, and the heat consumption operation. For example, only the heat storage operation is executed. It can also be configured, and it is possible to appropriately change which operation to perform among a plurality of operations. Incidentally, when it is configured to execute only the heat storage operation, the heating terminal supply path 27, the heat consumption part supply path 37, and the like can be omitted.

(2) In the above-described embodiment, the hot / cold water combined terminal 29 and the air conditioning terminal 30 are combined with the cooling terminal 40 and the heating terminal 26. However, the cooling terminal 40 and the heating terminal 26 are provided separately. May be.

(3) In the above embodiment, the opening degree of the circulation flow rate adjustment valve 20 is adjusted when adjusting the flow rate of the heat storage fluid 13 in the circulation path 16. For example, the rotation of the heat storage fluid circulation pump 18 is adjusted. By adjusting the speed, the flow rate of the heat storage fluid 13 in the circulation path 16 can also be adjusted, and how the flow rate of the heat storage fluid 13 in the circulation path 16 is adjusted can be appropriately changed.

(4) In the above embodiment, when the heat consumption is large, the auxiliary heat source regulating valve 54 is opened to operate the auxiliary heat source unit 23, and the heat from the compression heat pump device 2 and the combined heat and power supply device 1 is It is also possible to cover heat consumption.

(5) In the above embodiment, the heat storage fluid circulation means 17 takes out the heat storage fluid 13 from the lower part of the heat storage tank 3 in the cooling terminal supply path circulation state. It can also be taken out.

(6) In the said embodiment, although the cogeneration system provided with the compression heat pump apparatus which concerns on this invention was illustrated, it can also implement by providing only the compression heat pump apparatus 2. FIG. Further, in addition to the compression heat pump device 2, the heat storage tank 3 in which the heat storage fluid 13 is stored and the heat storage fluid 13 taken out from the heat storage tank 3 are supplied to the high temperature side heat exchange unit 11 as a high temperature side fluid and supplied to the heat storage tank. The heat storage fluid circulation means 17 that circulates the heat storage fluid 13 in the circulation path 16 in the form of returning to 3 may be provided.

Diagram showing heat storage operation in schematic diagram of cogeneration system Diagram showing excess heat radiation operation in schematic diagram of cogeneration system Diagram showing heating operation in schematic diagram of cogeneration system Diagram showing cooling operation in schematic diagram of cogeneration system Diagram showing heat consumption operation in schematic diagram of cogeneration system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cogeneration apparatus 2 Compression heat pump apparatus 3 Heat storage tank 4 Compression part (compressor)
5 Condensing part 6 Expansion part (expansion valve)
DESCRIPTION OF SYMBOLS 7 Evaporating part 8 Refrigerant circuit 11 High temperature side heat exchanging part 12 Low temperature side heat exchanging part 13 Thermal storage fluid 15 Electric power supply part 16 Circulation path 17 Thermal storage fluid circulation means 19 Waste heat type heating part 21 Cooling terminal supply path 23 Auxiliary heat source machine 24 Bypass Path 26 Heating terminal 27 Heating terminal supply path 30 Air conditioning terminal 36 Heat consumption section 37 Heat consumption section supply path 39 Low temperature side fluid circulation path 40 Cooling terminal 41 Cooling terminal circulation means

Claims (12)

A compression heat pump device provided with a refrigerant circuit that circulates the refrigerant in the order of a compression unit that compresses the refrigerant, a condensing unit that dissipates heat from the refrigerant, an expansion unit that expands the refrigerant, and an evaporation unit that absorbs heat from the refrigerant,
A high temperature side heat exchanging unit that is disposed between the compression unit and the condensing unit in the refrigerant circuit and enables heat exchange between the refrigerant compressed by the compression unit and the high temperature side fluid; ,
A low-temperature side heat exchanging unit that is disposed between the expansion unit and the evaporation unit in the refrigerant circuit and enables heat exchange between the refrigerant expanded in the expansion unit and the low-temperature side fluid; A compression heat pump device.   A heat storage tank in which the heat storage fluid is stored, and the heat storage fluid taken out from the heat storage tank is supplied to the high temperature side heat exchange unit as the high temperature side fluid and returned to the heat storage tank, and the heat storage fluid is circulated in the circulation path. The heat storage fluid circulation means for performing the compression heat pump device according to claim 1. A cogeneration system provided with the compression heat pump device according to claim 2 and a cogeneration device that generates electric power and heat,
Exhaust heat that is disposed between the high temperature side heat exchange section and the heat storage tank in the circulation path and heats the heat storage fluid that has passed through the high temperature side heat exchange section with heat generated by the combined heat and power supply device. A heating unit;
An electric power supply unit capable of supplying electric power generated in the cogeneration device as driving electric power for the compression unit in the compression heat pump device;
A cogeneration system provided with operation control means for controlling the operation of the heat storage fluid circulation means and the operation of the compression heat pump device. The heat storage fluid circulation means passes the heat storage fluid taken out from the lower part of the heat storage tank in the order of the high temperature side heat exchange part and the exhaust heat type heating part and returns to the upper part of the heat storage tank. The heat storage tank circulating state that circulates the heat storage fluid is configured to be freely switchable,
The operation control means operates the heat storage fluid circulation means in the heat storage tank circulation state, and supplies the electric power generated by the electric power supply unit in the thermoelectric supply device as driving electric power for the compression unit. The cogeneration system according to claim 3, wherein a heat storage operation for operating the compression heat pump device is executed in a state. The heat storage fluid circulation means passes the heat storage fluid taken out from the lower part of the heat storage tank in the order of the high temperature side heat exchange part and the exhaust heat type heating part and returns to the upper part of the heat storage tank. The heat storage tank circulating state that circulates the heat storage fluid is configured to be freely switchable,
The said operation control means is comprised so that the surplus heat radiation operation which operates the said thermal storage fluid circulation means in the said thermal storage tank circulation state and operates the said compression heat pump apparatus is executable. Cogeneration system. In the circulation path, the heat storage fluid branched from between the exhaust heat heating unit and the heat storage tank and passing through the exhaust heat heating unit is supplied to the high temperature side heat exchange unit by bypassing the heat storage tank. Provided a bypass,
The heat storage fluid circulation means passes the heat storage fluid taken out from the lower part of the heat storage tank in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit, and passes through the exhaust heat type heating unit. In a form in which at least a part is supplied to the bypass passage, it is configured to be switchable to a bypass passage circulation state in which the heat storage fluid is circulated in the circulation passage and the bypass passage,
The cogeneration system according to claim 5, wherein the operation control means is configured to be operable by switching the heat storage fluid circulation means to the bypass passage circulation state in the surplus heat radiation operation. A heating terminal supply path that branches from between the exhaust heat type heating unit and the heat storage tank in the circulation path and supplies the heat storage fluid that has passed through the exhaust heat type heating unit to the heating terminal and returns it to the heat storage tank. Provided,
The heat storage fluid circulation means passes the heat storage fluid taken out from the upper part of the heat storage tank in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit, and passes through the exhaust heat type heating unit. In the form of supplying at least a part to the heating terminal supply path, it is configured to be switchable to a heating terminal supply path circulation state in which the heat storage fluid is circulated in the circulation path and the heating terminal supply path,
The operation control means operates the heat storage fluid circulation means in the heating terminal supply path circulation state, and supplies the electric power generated by the electric power supply unit as the driving electric power for the compression unit. The cogeneration system according to any one of claims 3 to 6, wherein a heating operation for operating the compression heat pump device is executed in an electric power supply state.   As the heating terminal, the air in the air-conditioning target space is heated by the heat storage fluid supplied in the heating terminal supply path, and the heat storage supplied to the air in the air-conditioning target space in the heating terminal supply path The cogeneration system according to claim 7, wherein an air conditioning terminal capable of adjusting a temperature and humidity of air in a space to be air conditioned by spraying a fluid is provided. Providing a cooling terminal circulation means for circulating the low temperature side fluid exchanged in the low temperature side heat exchange section between the low temperature side heat exchange section and the cooling terminal in a low temperature side fluid circulation path;
The cogeneration system according to any one of claims 3 to 8, wherein the operation control unit is configured to be capable of performing a cooling operation for operating the compression heat pump device and the cooling terminal circulation unit. A cooling terminal supply path that branches from between the exhaust heat type heating unit and the heat storage tank in the circulation path and supplies the heat storage fluid that has passed through the exhaust heat type heating unit to the cooling terminal and returns it to the heat storage tank. Provided,
The heat storage fluid circulation means passes at least one of the heat storage fluids that has passed through the exhaust heat type heating unit by passing the heat storage fluid taken out from the heat storage tank in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit. In a form that supplies the cooling terminal supply path to the cooling terminal supply path, and is configured to be switchable to a cooling terminal supply path circulation state that circulates the heat storage fluid in the circulation path and the cooling terminal supply path,
As the cooling terminal, the air in the air-conditioning target space is cooled and dehumidified with the low temperature side fluid supplied through the low temperature side fluid circulation path, and then heated with the heat storage fluid supplied through the cooling terminal supply path. An air conditioning terminal that can adjust the temperature and humidity of the air in the air conditioning target space is provided.
The cogeneration system according to claim 9, wherein the operation control means is configured to operate the heat storage fluid circulation means in the cooling terminal supply path circulation state in the cooling operation. Heat consumption that branches from between the exhaust heat type heating unit and the heat storage tank in the circulation path and that passes through the exhaust heat type heating unit to the heat consumption unit and returns to the lower part of the heat storage tank Part supply path,
The heat storage fluid circulation means passes the heat storage fluid taken out from the upper part of the heat storage tank in the order of the high temperature side heat exchange unit and the exhaust heat type heating unit and passes through the exhaust heat type heating unit. In the form to be supplied to the heat consuming part supply path, the heat consuming part supply path circulates the heat storage fluid in the circulation path and the heat consuming part supply path, and is configured to be switchable.
The operation control means operates the heat storage fluid circulation means in the heat consumption part supply path circulation state, and supplies the electric power generated by the electric power supply unit as the driving electric power for the compression part. The cogeneration system according to any one of claims 3 to 10, wherein a heat consumption operation for operating the compression heat pump device can be executed when a power supply state is established. An operation method of a compression heat pump apparatus provided with a refrigerant circuit that circulates the refrigerant in the order of a compression unit that compresses the refrigerant, a condensing unit that radiates heat from the refrigerant, an expansion unit that expands the refrigerant, and an evaporation unit that absorbs heat from the refrigerant. There,
In the refrigerant circuit, heat exchange is performed between the refrigerant compressed in the compression unit and the high-temperature side fluid in a high-temperature side heat exchange unit arranged between the compression unit and the condensation unit, and the refrigerant A compression heat pump device for exchanging heat between the refrigerant expanded in the expansion unit and a low-temperature side fluid in a low-temperature side heat exchange unit disposed between the expansion unit and the evaporation unit in the circuit how to drive.

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