JP2018044689A - Apparatus and method for controlling heat interchange between district heating and cooling systems - Google Patents

Abstract

The present invention aims to minimize the total running cost by maximizing the energy saving amount regardless of the skill of a driving engineer. In addition to a first controller 101 that controls the operation of a first heat source machine group 201 and a second controller 102 that controls the operation of a second heat source machine group 301, a first controller and a second controller are provided. A third controller 103 is provided for giving various instructions to 101 and 102. In the third controller 103, the operating efficiency of the final operating unit in the first heat source unit group 201 is compared with the operating efficiency of the final operating unit in the second heat source unit group 301, and the heat source to which the heat source unit having high operating efficiency belongs The direction from the machine group to the heat source machine group to which the heat source machine with low operating efficiency belongs is defined as the cold / warm water interchange direction, and the cold / warm water interchange direction and the cold / warm water interchange amount in the interchange direction are the first and second controllers. 101 and 102 are instructed. [Selection] Figure 1

Description

  The present invention relates to a heat interchange control device and method between district heating and cooling systems for accommodating the amount of heat generated by a heat source machine group between district cooling and heating systems.

  Conventionally, district heating and cooling systems (DHC (District Heating & Cooling Plant)) that supply cold and hot water (heat) to multiple buildings (customers) from a heat supply plant are used for heat supply in consideration of the maximum load on the customer. A plurality of heat source machines are provided in the plant, and the number of operating heat source machines (heat source machine groups) provided in the heat supply plant is controlled according to the load situation at that time (for example, see Patent Document 1). ).

  In recent years, in order to save energy, there has been a case where “heat interchange” is adopted in which heat generated by a group of heat source units is interchanged between DHCs. “Heat interchange” is to connect a plurality of DHCs with pipes and to cover a load generated from each heat supply plant from a heat source machine with good operating efficiency (see, for example, Non-Patent Document 1).

JP-A-8-271018

“Inter-building heat exchange promotion manual, Ministry of Land, Infrastructure, Transport and Tourism, Urban and Regional Development Bureau”, [searched on September 12, 2016], Internet <http://www.mlit.go.jp/crd/city/sigaiti/shuhou /ecomachi/fukyu_manual.pdf#search='%E5%BB%BA%E7%89%A9%E9%96%93%E7%86%B1%E8%9E%8D%E9%80%9A%E5%8F % 8A% E4% BF% 83% E9% 80% B2% E3% 83% 9E% E3% 83% 8B% E3% 83% A5% E3% 82% A2% E3% 83% AB '＞

  However, the conventional “heat interchange” between DHCs is performed manually. That is, an operation engineer resident in the DHC determines a heat source machine in operation that is considered to have good operation efficiency, and allows cold / hot water to be interchanged from the heat source machine group to which the heat source machine belongs to another heat source machine group. . For this reason, the amount of energy saving depends on the skill of the driving engineer, and it is difficult to minimize the overall running cost.

  The present invention has been made to solve such problems, and the object of the present invention is to save energy and minimize the overall running cost regardless of the skill of the driving engineer. An apparatus and method for controlling heat interchange between district heating and cooling systems.

  In order to achieve such an object, the present invention includes a first district cooling and heating system (200) that supplies heat generated by the first heat source unit group (201) to a first consumer (202), and The first heat source machine group and the second heat source machine group and the second district air conditioning system (300) that supplies the amount of heat generated by the second heat source machine group (301) to the second consumer (302). In the heat interchange control device (100) between the district cooling and heating systems that accommodates the amount of heat generated by the heat source unit group, the operation of the devices (201, 203, 401) in the first district cooling and heating system including the first heat source unit group is performed. A first controller (101) for controlling, a second controller (102) for controlling the operation of the devices (301, 303, 402) in the second district air conditioning system including the second heat source unit group, And A third controller (103) for giving various instructions to the second controller, and the third controller (103) is an overall heat source that combines the first heat source machine group and the second heat source machine group. The operation order instruction means (12) for instructing the operation order of each heat source machine in the machine group to the first and second controllers, and the first and second according to the load situation of the first and second heat source machine groups The heat source unit increase / decrease stage instructing means (21) for instructing the first and second controllers to increase / decrease the number of heat source units in the heat source unit group, and the operation order of the heat source units in operation in the first heat source unit group is final. Compare the operating efficiency of the heat source unit and the operating efficiency of the heat source unit that is operating in the second heat source unit group. The operating efficiency of the heat source unit group to which the heat source unit with the higher operating efficiency belongs is compared. Head to the heat source machine group to which the low heat source machine belongs Direction determination means (22) for determining the direction as the direction of accommodation of heat quantity between the first heat source machine group and the second heat source machine group, and the amount of heat to be accommodated in the accommodation direction determined by the accommodation direction judgment means. The accommodation amount determining means (23) for determining the accommodation amount, and the accommodation for instructing the accommodation amount determined by the accommodation direction determining means and the accommodation amount determined by the accommodation amount determining means to at least one of the first and second controllers. Direction / conversation amount instruction means (24).

  In the present invention, the third controller instructs the first and second controllers of the operation order of each heat source unit in the entire heat source unit group including the first heat source unit group and the second heat source unit group. . In addition, the third controller instructs the first and second controllers to increase or decrease the heat source units in the first and second heat source unit groups according to the load status of the first and second heat source unit groups. In addition, the third controller includes the operating efficiency of the heat source unit (final operating unit) whose operating order is the final among the operating heat source units in the first heat source unit group and the operating heat source unit in the second heat source unit group. Compared with the operation efficiency of the heat source unit (final operation unit) whose operation sequence is the last, the direction from the heat source unit group to which the heat source unit with high operation efficiency belongs to the heat source unit group to which the heat source unit with low operation efficiency belongs is accommodated The amount of heat to be accommodated in the accommodation direction is determined as the accommodation amount, and the determined accommodation direction and the accommodation amount are instructed to at least one of the first and second controllers.

  In the present invention, from the third controller to the first and second controllers, the operation sequence of each heat source unit in the entire heat source unit group including the first heat source unit group and the second heat source unit group, And the increase / decrease stage of each heat source unit in the second heat source unit group (start / stop of each heat source unit), the direction of accommodation and the amount of accommodation between the first heat source unit group and the second heat source unit group are instructed. The As a result, the “thermal interchange” that is conventionally performed manually is automatically performed, and energy saving can be achieved and the overall running cost can be minimized regardless of the skill of the driving engineer.

  In the present invention, the amount of accommodation instructed to at least one of the first and second controllers may be determined as the amount of accommodation that minimizes the overall running cost. For example, from the relationship between the amount of heat to be accommodated between the first heat source unit group and the second heat source unit group and the overall running cost including the conveyance power necessary for accommodating this amount of heat, the overall running The amount of heat that minimizes the cost is determined as the optimum accommodation amount, and this optimum accommodation amount is determined as the accommodation amount.

  In the above description, as an example, constituent elements on the drawing corresponding to the constituent elements of the invention are indicated by reference numerals with parentheses.

  As described above, according to the present invention, the operation order of the heat source units in the entire heat source unit group including the first heat source unit group and the second heat source unit group, the first and second heat source units. The increase / decrease stage of each heat source unit in the group, the direction and amount of heat exchange between the first heat source unit group and the second heat source unit group from the third controller to at least one of the first and second controllers As a result, it is possible to save energy and minimize the overall running cost regardless of the skill of the driving engineer.

FIG. 1 is a diagram showing a main part of a system using a heat interchange control device according to an embodiment of the present invention. FIG. 2 is a diagram showing a state in which all the heat source units are in an operating state in this system. FIG. 3 is a diagram illustrating a state (Example 1) in which heat (cold / warm water) is interchanged from the second heat source unit group to the first heat source unit group in this system. FIG. 4 is a diagram showing a state (Example 2) in which heat (cold / warm water) is interchanged from the second heat source unit group to the first heat source unit group in this system. FIG. 5 is a diagram showing a state (Example 3) in which heat (cold / warm water) is interchanged from the second heat source unit group to the first heat source unit group in this system. FIG. 6 is a diagram illustrating the relationship between the flow rate of cold / hot water (accommodation flow rate) to be accommodated between the first heat source unit group and the second heat source unit group and the overall running cost. FIG. 7 is a diagram showing details of the overall operation order determination processing unit and the accommodation / increase / decrease stage correction processing unit in the third controller. FIG. 8 is a diagram illustrating an example in which one accommodation pump is used.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a main part of a system using a heat interchange control device 100 according to an embodiment of the present invention.

  In this system, the heat interchange control device 100 is provided for the first district cooling / heating system (DHC) 200 and the second district cooling / heating system (DHC) 300, and the first controller 101 and the second A controller 102 and a third controller 103 are provided.

  The first controller 101 controls the operation of equipment such as the first heat source machine group 201 and the primary pump 203 and the accommodation pump 401 described later in the first district cooling and heating system 200, and the second controller 102 The operation of devices such as the second heat source machine group 301, the primary pump 203 and the accommodation pump 402, which will be described later, is controlled in the second district heating and cooling system 300. The third controller 103 gives various instructions to the first controller 101 and the second controller 102. Various instructions given by the controller 103 to the controllers 101 and 102 will be described later.

  In the first district cooling and heating system 200, cold / warm water (amount of heat) generated by the first heat source machine group 201 is supplied to the first consumer 202 through the outgoing water pipe LS1 and the return water pipe LR1. A primary pump 203 is provided in the outgoing water line LS1. The first heat source machine group 201 includes three heat source machines 201-1, 201-2, and 201-3, and these heat source machines together with the primary pump 203 are the first heat supply plant. P1 is provided.

  In the second district cooling and heating system 300, the cold / hot water (heat amount) generated by the second heat source machine group 301 is supplied to the second consumer 302 through the outgoing water pipe LS2 and the return water pipe LR2. A primary pump 303 is provided in the outgoing water line LS2. The second heat source machine group 301 includes two heat source machines, ie, heat source machines 301-1 and 301-2, and these heat source machines are provided in the second heat supply plant P2 together with the primary pump 303. ing.

  In this system, the first district cooling / heating system 200 and the second district heating / cooling system 300 are connected by pipes L1, L2. In this embodiment, the first district cooling / heating system 200 side outgoing water line LS1 and the second district cooling / heating system 300 side outgoing water line LS2 are connected by a pipe L1, and the pipe L1 is connected to the outgoing water pipe LS1 from the outgoing water line LS1. The 1st interchangeable pump 401 which makes the flow of the cold / hot water which goes to the path LS2 is provided. Further, the outgoing water line LS2 on the second district air-conditioning system 300 side and the outgoing water line LS1 on the first district air-conditioning system 200 side are connected by a pipe L2, and the pipe L2 is directed from the outgoing water line LS2 to the outgoing water line LS1. The 2nd interchangeable pump 402 which makes the flow of cold / hot water is provided.

Further, the pipe L1 is flow meter 501 is provided for measuring the flow rate of the hot and cold water flowing through the pipe L1 as flexible amount QP1 _U of hot and cold water from the first heat source unit group 201 to the second heat source unit group 301 in which, the pipe L2, the flow meter 502 for measuring the flow rate of the hot and cold water flowing through the pipe L2 as a flexible amount QP2 _U of hot and cold water from the second heat source unit group 301 to the first heat source unit group 201 is provided It has been. The first heat supply plant P1 is provided with a flow meter 503 for measuring the flow rate of cold / hot water from the first heat source unit group 201 to the customer 202 as the load flow rate QP1, and the second heat The supply plant P2 is provided with a flow meter 504 that measures the flow rate of cold / hot water from the second heat source machine group 301 to the customer 302 as a load flow rate QP2.

  As described above, the heat interchange control device 100 includes the first controller 101, the second controller 102, and the third controller 103. The first controller 101, the second controller 102, and the third controller 103 in the heat interchange control device 100 implement hardware that includes a processor and a storage device, and various functions in cooperation with these hardware. Realized by the program.

  In this heat interchange control device 100, the first controller 101 is a dedicated controller provided for controlling the operation of equipment in the district cooling and heating system 200 including the heat source unit group 201, and the second controller 102 is a heat source. It is a dedicated controller provided for controlling the operation of equipment in the district heating and cooling system 300 including the machine group 301.

  In the present embodiment, a third controller 103 is provided as a separate controller for the dedicated controllers 101 and 102, and information is expanded from the third controller 103 to the first controller 101 and the second controller 102. By doing so, energy saving as a whole is aimed at.

  Hereinafter, a processing operation unique to the present embodiment performed by the heat accommodation control device 100 will be described while exchanging the functions of the third controller 103.

  The third controller 103 includes an overall operation order determination processing unit 10 and an accommodation / increase / decrease stage correction processing unit 20 as processing functions executed by the processor.

  In the third controller 103, the overall operation order determination processing unit 10 considers “load”, “outside air”, “equipment characteristics”, “various constraint conditions”, and the like, so that the cost is minimized. The operation order of each heat source machine in the entire heat source machine group including the machine group 201 and the second heat source machine group 301 is determined, and the determined operation order of each heat source machine is determined by the first controller 101 and the second heat source machine group. The controller 102 is instructed.

  In response to the operation order instruction from the third controller 103, the first controller 101 and the second controller 102 receive the heat source devices 201-1 to 201-3 and the second heat source device 201 in the first heat source device group 201. The heat source machines 301-1 and 301-2 in the heat source machine group 301 are activated.

  In this example, the operation order of the heat source machine 301-1 is first (1st), the operation order of the heat source machine 201-1 is second (2nd), and the operation order of the heat source machine 201-2 is third (3rd). ), The operation sequence of the heat source device 301-2 is fourth (4th), the operation sequence of the heat source device 201-3 is fifth (5th), and each heat source device is started. Thereby, all the heat source machines in the heat supply plants P1 and P2 are in an operating state (see FIG. 2). In this state, it is assumed that the accommodation pumps 401 and 402 are stopped.

  In the third controller 103, the accommodation / increase / decrease stage correction processing unit 20 receives the load statuses of the first heat source machine group 201 and the second heat source machine group 301 from the first controller 101 and the second controller 102, and each Obtain the operating status of the heat source machine.

  In this case, the load flow rate QP1 measured by the flow meter 503 is sent to the accommodation / increase / decrease stage correction processing unit 20 of the third controller 103 via the first controller 101 as the load status of the first heat source machine group 201. The load flow rate QP2 measured by the flow meter 504 is sent to the accommodation / increase / decrease stage correction processing unit 20 of the third controller 103 via the second controller 102 as the load status of the second heat source machine group 301.

  Further, the heat source units 201-1 to 201-3 in which the first controller 101 is activated serve as operating heat source units in the first heat source unit group 201, and the interchange / increase / decrease stage correction processing unit 20 of the third controller 103. The heat source units 301-1 and 301-2 in which the second controller 102 has been started are used as heat source units in operation in the second heat source unit group 301, and the interchange / increase / decrease stage correction processing of the third controller 103 is performed. Sent to the unit 20.

  In the third controller 103, the accommodation / increase / decrease stage correction processing unit 20 determines the first heat source unit group 201 and the second heat source unit group 301 based on the obtained load status and the operating status of each heat source unit. The heat source unit increase / decrease stage correction in the first heat source unit group 201 and the second heat source unit group 301 is performed.

[Example 1: When the heat source unit 301-2 in the second heat source unit group 301 is unnecessary]
The accommodation / increase / decrease stage correction processing unit 20 reduces the stage to the second controller 102 when it is determined that the heat source unit 301-2 in the second heat source unit group 301 is unnecessary according to the load state of the second heat source unit group 301. An instruction is given to stop the operation of the heat source machine 301-2 (see FIG. 3).

  In this case, among the heat source machines in operation in the first heat source machine group 201, the heat source machine (the last operation machine) whose operation order is final is the heat source machine 201-3, and the heat source in operation in the second heat source machine group 301 The heat source machine (final operation machine) whose operation order is final among the machines is the heat source machine 301-1.

  In this state, the accommodation / increase / decrease stage correction processing unit 20 compares the operation efficiency of the final heat source unit in the first heat source unit group 201 with the operation efficiency of the final heat source unit in the second heat source unit group 301. That is, the operation efficiency of the heat source machine 201-3 in the first heat source machine group 201 and the operation efficiency of the heat source machine 301-1 in the second heat source machine group 301 are compared. In this example, it is assumed that the operation efficiency of the heat source device 301-1 is higher than the operation efficiency of the heat source device 201-3.

  In this case, the accommodation / increase / decrease stage correction processing unit 20 sets the first direction from the heat source machine group 301 to which the heat source machine 301-1 with high operating efficiency belongs to the heat source machine group 201 to which the heat source machine 201-3 with low operating efficiency belongs. The hot / cold water accommodation direction between the heat source machine group 201 and the second heat source machine group 301 is set to be the first controller 101 and the second controller 101. The controller 102 is instructed.

In this example, since the accommodation direction of the cold / hot water is the direction from the second heat source unit group 301 toward the first heat source unit group 201, the second controller 102 activates the second interchange pump 402, and the second The hot / cold water from the heat source machine group 301 is accommodated in the first heat source machine group 201. In addition, the second controller 102 observes the accommodation amount QP2 _U of the cold / hot water from the second heat source device group 301 to the first heat source device group 201, which is measured by the flowmeter 502. The operation of the accommodation pump 402 is controlled so that QP2 _U has the instructed accommodation amount.

On the other hand, the first controller 101 controls the primary pump 203 with a variable flow rate based on the QP2 _U amount of cold / hot water from the second heat source unit group 301 to the first heat source unit group 201 measured by the flow meter 502. Control. In other words, the primary pump 203 is set so that the sum of the amount QP2 _{U of} cold / hot water measured by the flow meter 502 and the load flow rate QP1 measured by the flow meter 503 is equal to the load flow rate QP1 before accommodating cold / hot water. Variable flow control.

  Thereby, the load of the 1st heat source machine group 201 to which the heat source machine 201-3 with low operating efficiency belongs, and the load is the cold / hot water from the heat source machine group 301 to which the heat source machine 301-1 with high operation efficiency belongs. Will be covered by the energy savings of the entire system.

[Example 2: When heat source machine 201-3 in first heat source machine group 201 and heat source machine group 301-2 in second heat source machine group 301 are unnecessary]
The accommodation / increase / decrease stage correction processing unit 20 is configured such that the heat source machine 201-3 and the second heat source machine group in the first heat source machine group 201 depend on the load status of the first heat source machine group 201 and the second heat source machine group 301. When it is determined that the heat source unit group 301-2 in 301 is unnecessary, a step-down instruction is given to the first controller 101 and the second controller 102, and the operation of the heat source unit 201-3 and the heat source unit 301-2 is performed. Stop (see FIG. 4).

  In this case, among the heat source machines in operation in the first heat source machine group 201, the heat source machine (the last operation machine) whose operation order is final is the heat source machine 201-2, and the heat source in operation in the second heat source machine group 301. The heat source machine (final operation machine) whose operation order is final among the machines is the heat source machine 301-1.

  In this state, the accommodation / increase / decrease stage correction processing unit 20 compares the operation efficiency of the final heat source unit in the first heat source unit group 201 with the operation efficiency of the final heat source unit in the second heat source unit group 301. That is, the operation efficiency of the heat source machine 201-2 in the first heat source machine group 201 and the operation efficiency of the heat source machine 301-1 in the second heat source machine group 301 are compared. In this example, it is assumed that the operation efficiency of the heat source device 301-1 is higher than the operation efficiency of the heat source device 201-2.

  In this case, the accommodation / increase / decrease stage correction processing unit 20 sets the first direction from the heat source unit group 301 to which the heat source unit 301-1 with high operating efficiency belongs to the heat source unit group 201 to which the heat source unit 201-2 with low operating efficiency belongs. The hot / cold water accommodation direction between the heat source machine group 201 and the second heat source machine group 301 is set to be the first controller 101 and the second controller 101. The controller 102 is instructed.

In this example, since the accommodation direction of the cold / hot water is the direction from the second heat source unit group 301 toward the first heat source unit group 201, the second controller 102 activates the accommodation pump 402, and the second heat source unit Cold / hot water from the group 301 is accommodated in the first heat source machine group 201. In addition, the second controller 102 observes the accommodation amount QP2 _U of the cold / hot water from the second heat source device group 301 to the first heat source device group 201, which is measured by the flowmeter 502. The operation of the accommodation pump 402 is controlled so that QP2 _U has the instructed accommodation amount.

On the other hand, the first controller 101 controls the primary pump 203 with a variable flow rate based on the QP2 _U amount of cold / hot water from the second heat source unit group 301 to the first heat source unit group 201 measured by the flow meter 502. Control. In other words, the primary pump 203 is set so that the sum of the amount QP2 _{U of} cold / hot water measured by the flow meter 502 and the load flow rate QP1 measured by the flow meter 503 is equal to the load flow rate QP1 before accommodating cold / hot water. Variable flow control.

  As a result, the load of the first heat source unit group 201 to which the heat source unit 201-2 with low operating efficiency belongs is lowered, and the cold / hot water from the heat source unit group 301 to which the heat source unit 301-1 with high operating efficiency belongs. Will be covered by the energy savings of the entire system.

[Example 3: When the heat source units 201-2 and 201-3 in the first heat source unit group 201 and the heat source unit group 301-2 in the second heat source unit group 301 are unnecessary]
The accommodation / increase / decrease stage correction processing unit 20 depends on the load state of the first heat source unit group 201 and the second heat source unit group 301, and the second heat source unit 201-2, 201-3 and second in the first heat source unit group 201. When it is determined that the heat source unit group 301-2 in the heat source unit group 301 is not required, a step-down instruction is given to the first controller 101 and the second controller 102, and the heat source units 201-2, 201-3 and The operation of the heat source machine 301-2 is stopped (see FIG. 5).

  In this case, among the heat source machines in operation in the first heat source machine group 201, the heat source machine whose operation order is final (final operation machine) is the heat source machine 201-1, and the heat source in operation in the second heat source machine group 301. The heat source machine (final operation machine) whose operation order is final among the machines is the heat source machine 301-1.

  In this state, the accommodation / increase / decrease stage correction processing unit 20 compares the operation efficiency of the final heat source unit in the first heat source unit group 201 with the operation efficiency of the final heat source unit in the second heat source unit group 301. That is, the operation efficiency of the heat source machine 201-1 in the first heat source machine group 201 and the operation efficiency of the heat source machine 301-1 in the second heat source machine group 301 are compared. In this example, it is assumed that the operation efficiency of the heat source device 301-1 is higher than the operation efficiency of the heat source device 201-1.

  In this case, the accommodation / increase / decrease stage correction processing unit 20 sets the first direction from the heat source unit group 301 to which the heat source unit 301-1 with high operating efficiency belongs to the heat source unit group 201 to which the heat source unit 201-1 with low operating efficiency belongs. The hot / cold water accommodation direction between the heat source machine group 201 and the second heat source machine group 301 is set to be the first controller 101 and the second controller 101. The controller 102 is instructed.

In this example, since the accommodation direction of the cold / hot water is the direction from the second heat source unit group 301 toward the first heat source unit group 201, the second controller 102 activates the accommodation pump 402, and the second heat source unit Cold / hot water from the group 301 is accommodated in the first heat source machine group 201. In addition, the second controller 102 observes the accommodation amount QP2 _U of the cold / hot water from the second heat source device group 301 to the first heat source device group 201, which is measured by the flowmeter 502. The operation of the accommodation pump 402 is controlled so that QP2 _U has the instructed accommodation amount.

On the other hand, the first controller 101 controls the primary pump 203 with a variable flow rate based on the QP2 _U amount of cold / hot water from the second heat source unit group 301 to the first heat source unit group 201 measured by the flow meter 502. Control. In other words, the primary pump 203 is set so that the sum of the amount QP2 _{U of} cold / hot water measured by the flow meter 502 and the load flow rate QP1 measured by the flow meter 503 is equal to the load flow rate QP1 before accommodating cold / hot water. Variable flow control.

  As a result, the load of the first heat source unit group 201 to which the heat source unit 201-1 with low operating efficiency belongs is lowered, and the cold / hot water from the heat source unit group 301 to which the heat source unit 301-1 with high operating efficiency belongs. Will be covered by the energy savings of the entire system.

[Availability]
In the third controller 103, the accommodation / increase / decrease stage correction processing unit 20 instructs the first controller 101 and the second controller 102 on the accommodation direction of the cold / hot water and the accommodation amount of the cold / hot water in the accommodation direction. To do. In this case, the third controller 103 determines the accommodation amount of the cold / hot water instructed to the first controller 101 and the second controller 102 as the accommodation amount that minimizes the overall running cost.

  Specifically, the total including the amount of cold / warm water to be accommodated between the first heat source machine group 201 and the second heat source machine group 301 and the conveyance power necessary for accommodating this amount of cold / warm water. The amount of cold / hot water that minimizes the overall running cost is determined as the optimum accommodation amount, and the determined optimum accommodation amount is instructed to the first controller 101 and the second controller 102. The amount to be used.

  In the example shown in FIG. 5, as shown in FIG. 6, the horizontal axis represents the amount of cold / hot water (conversation flow rate) to be accommodated between the first heat source unit group 201 and the second heat source unit group 301, and the heat The sum of the running cost of the heat source unit 201-1 in the supply amount plant P1, the running cost of the heat source unit 301-1 in the heat supply unit plant P2 and the running cost of the interchangeable pump 402 is taken as the total running cost on the vertical axis, The accommodation flow rate at which the running cost is minimized is determined as the optimum accommodation amount, and the determined optimum accommodation amount is set as the accommodation amount instructed to the first controller 101 and the second controller 102.

  FIG. 7 shows details of the overall operation order determination processing unit 10 and the accommodation / increase / decrease stage correction processing unit 20 in the third controller 103. The overall operation order determination processing unit 10 includes an overall operation order determination unit 11 and an overall operation order instruction unit 12. The accommodation / increase / decrease stage correction processing unit 20 includes a heat source unit increase / decrease stage instruction part 21 and an accommodation direction determination part. 22, an accommodation amount determination unit 23, and an accommodation direction / accommodation amount instruction unit 24.

  In the overall operation order determination processing unit 10, the overall operation order determination unit 11 takes into consideration “load”, “outside air”, “equipment characteristics”, “various constraint conditions”, and the like so that the cost is minimized. The operation order of each heat source machine in the entire heat source machine group including the heat source machine group 201 and the second heat source machine group 301 is determined. The overall operation order instruction unit 12 instructs the first controller 101 and the second controller 102 about the operation order of each heat source machine determined by the overall operation order determination unit 11.

  In the accommodation / increase / decrease stage correction processing unit 20, the heat source unit increase / decrease stage instructing unit 21 includes the first heat source unit group 201 and the second heat source unit group 201 and the second heat source unit group 301 according to the load status of the first heat source unit group 201 and the second heat source unit group 301. The increase / decrease level of the heat source unit in the heat source unit group 301 is determined, and an instruction is given to the first controller 101 and the second controller 102.

  In the accommodation / increase / decrease correction processing unit 20, the accommodation direction determination unit 22 determines the operation efficiency of the heat source unit (final operation unit) whose operation sequence is the final among the heat source units in operation in the first heat source unit group 201. Compared with the operation efficiency of the heat source unit (final operation unit) whose operation sequence is the final among the heat source units in operation in the heat source unit group 301, the heat source unit having the low operation efficiency from the heat source unit group to which the heat source unit having the high operation efficiency belongs The direction toward the heat source machine group to which the machine belongs is determined as the interchange direction of the cold / hot water between the first heat source machine group 201 and the second heat source machine group 301.

  In the accommodation / increase / decrease stage correction processing unit 20, the accommodation amount determination unit 23 supplies the amount of cold / hot water to be accommodated between the first heat source device group 201 and the second heat source device group 301, and this amount of cold / hot water. Based on the relationship with the overall running cost including the transfer power required for accommodation, the amount of cold / warm water that minimizes the overall running cost is judged as the optimum accommodation amount, and this optimum accommodation amount is the amount of accommodation of cold / hot water. Determine as.

  In the accommodation / increase / decrease stage correction processing unit 20, the accommodation direction / accommodation amount instruction unit 24 includes the accommodation direction of the cold / hot water determined by the accommodation direction determination unit 22 and the accommodation amount of the cold / hot water determined by the accommodation amount determination unit 23. Is instructed to the first controller 101 and the second controller 102.

  Thus, according to the present embodiment, the operating sequence of each heat source unit in the entire heat source unit group including the first heat source unit group 201 and the second heat source unit group 301, the first heat source unit Increase / decrease stage of each heat source unit in the group 201 and the second heat source unit group 301, and the interchange direction and the amount of cold / hot water between the first heat source unit group 201 and the second heat source unit group 301 are the third controller. 103 is instructed to the first controller 101 and the second controller 102, and it is possible to save energy and minimize the overall running cost regardless of the skill of the driving engineer.

  In the above-described embodiment, the accommodation / increase / decrease stage correction processing unit 20 instructs the first controller 101 and the second controller 102 about the accommodation direction and amount of cold / hot water. It is not necessary to give to both the first controller 101 and the second controller 102. For example, in Example 1, Example 2 and Example 3, the direction from the second heat source unit group 301 to the second heat source unit group 201 is the cold water supply direction, so the operation of the accommodation pump 402 is controlled. The instruction may be given only to the second controller 102.

  In the above-described embodiment, the pipes L1 and L2 are provided between the first district cooling and heating system 200 and the second district cooling and heating system 300, and the accommodation pumps 401 and 402 are provided in the pipes L1 and L2. However, as shown in FIG. 8, a pipe L is provided between the first district cooling / heating system 200 and the second district cooling / heating system 300, and it is possible to switch the flow direction of the cold / hot water to the pipeline L. A pump 400 may be provided. In this case, the accommodation pump 400 is a device shared by the first district cooling / heating system 200 and the second district cooling / heating system 300. That is, the accommodation pump 400 is also a device on the first district air conditioning system 200 side and a device on the second district air conditioning system 300 side.

  Moreover, in embodiment mentioned above, although the heat quantity supplied to the 1st consumer 202 or the 2nd consumer 302 was made into cold / hot water, it cannot be overemphasized that it is not restricted to cold / hot water.

[Extension of the embodiment]
The present invention has been described above with reference to the embodiment. However, the present invention is not limited to the above embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the technical idea of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Whole operation order judgment part, 11 ... Whole operation order instruction | indication part, 12 ... Whole operation order instruction | indication part, 20 ... Accommodation / increase / decrease stage correction process part, 21 ... Heat source machine increase / decrease stage instruction | indication part, 22 ... Interchange direction determination part, DESCRIPTION OF SYMBOLS 23 ... Accommodation amount determination part, 24 ... Accommodation direction / accommodation amount instruction | indication part, 100 ... Thermal accommodation control apparatus, 101 ... 1st controller, 102 ... 2nd controller, 103 ... 3rd controller, 200 ... 1st District heating / cooling system, 201 ... first heat source machine group, 201-1 to 201-3 ... heat source machine, 202 ... first consumer, 300 ... second district heating / cooling system, 301 ... second heat source machine group, 301-1, 301-2 ... heat source machine, 302 ... second consumer, 400 ... accommodation pump, 401 ... first accommodation pump, 402 ... second accommodation pump, 501-504 ... flow meter, P1 ... first 1 heat supply plant, P ... the second of the heat supply for the plant.

Claims (4)

A first district cooling and heating system that supplies heat generated by the first heat source unit group to the first consumer, and a second that supplies heat amount generated by the second heat source unit group to the second consumer In the heat interchange control device between the district heating and cooling systems for accommodating the amount of heat generated by the first heat source unit group and the second heat source unit group between the district heating and cooling system,
A first controller for controlling operation of equipment in the first district cooling and heating system including the first heat source machine group;
A second controller for controlling operation of equipment in the second district cooling and heating system including the second heat source machine group;
A third controller for giving various instructions to the first and second controllers,
The third controller includes:
An operation order instruction means for instructing the first and second controllers of the operation order of each heat source machine in the entire heat source machine group including the first heat source machine group and the second heat source machine group;
Heat source unit increase / decrease level instruction means for instructing the first and second controllers to increase / decrease the number of heat source units in the first and second heat source unit groups according to the load status of the first and second heat source unit groups. When,
The operation efficiency of the final heat source machine among the heat source machines in operation in the first heat source machine group and the operation of the final heat source machine among the heat source machines in operation in the second heat source machine group. Compared with the efficiency, the direction from the heat source unit group to which the heat source unit having high operation efficiency belongs to the heat source unit group to which the heat source unit having low operation efficiency belongs to the first heat source unit group and the second heat source unit group. An interchange direction determination means for determining an interchange direction of heat quantity between;
An accommodation amount determining means for determining an amount of heat to be accommodated in the accommodation direction determined by the accommodation direction determining means as an accommodation amount;
A accommodation direction / accommodation amount instruction means for instructing at least one of the first and second controllers the accommodation amount determined by the accommodation direction determination means and the accommodation amount determined by the accommodation amount determination means. A heat exchange control device between district heating and cooling systems. In the heat interchange control apparatus between the district heating and cooling systems described in claim 1,
The accommodation amount determining means includes:
From the relationship between the amount of heat to be accommodated between the first heat source unit group and the second heat source unit group and the overall running cost including the conveyance power necessary for accommodating this amount of heat, the overall running An apparatus for controlling heat accommodation between district heating and cooling systems, wherein the amount of heat that minimizes the cost is determined as the optimum accommodation amount, and the optimum accommodation amount is determined as the accommodation amount. A first district cooling and heating system that supplies heat generated by the first heat source unit group to the first consumer, and a second that supplies heat amount generated by the second heat source unit group to the second consumer A first controller for controlling operation of equipment in the first district air conditioning system including the first heat source unit group, and the second district air conditioning unit including the second heat source unit group. Applied to a system comprising a second controller for controlling operation of equipment in the system, and between the first district air conditioning system and the second district air conditioning system, the first heat source machine group and the In the heat interchange control method between district heating and cooling systems that accommodate the amount of heat generated by the second heat source unit group,
An operation order instruction step for instructing the first and second controllers of the operation order of each heat source machine in the entire heat source machine group including the first heat source machine group and the second heat source machine group;
Heat source unit increase / decrease level instruction step for instructing the first and second controllers to increase / decrease the number of heat source units in the first and second heat source unit groups according to the load status of the first and second heat source unit groups When,
The operation efficiency of the final heat source machine among the heat source machines in operation in the first heat source machine group and the operation of the final heat source machine among the heat source machines in operation in the second heat source machine group. Compared with the efficiency, the direction from the heat source unit group to which the heat source unit having high operation efficiency belongs to the heat source unit group to which the heat source unit having low operation efficiency belongs to the first heat source unit group and the second heat source unit group. An interchange direction determining step for determining an interchange direction of heat quantity between;
An accommodation amount determining step for determining an amount of heat to be accommodated in the accommodation direction determined by the accommodation direction determination step as an accommodation amount;
An accommodation direction / accommodation amount instruction step for instructing at least one of the first and second controllers the accommodation amount determined by the accommodation direction determination step and the accommodation amount determined by the accommodation amount determination step. A method for controlling heat interchange between district heating and cooling systems. In the heat interchange control method between the district heating and cooling systems according to claim 3,
The accommodation amount determining step includes:
From the relationship between the amount of heat to be accommodated between the first heat source unit group and the second heat source unit group and the overall running cost including the conveyance power necessary for accommodating this amount of heat, the overall running A method of controlling heat accommodation between district heating and cooling systems, wherein the amount of heat that minimizes the cost is determined as the optimum accommodation amount, and the optimum accommodation amount is determined as the accommodation amount.