Heat accommodation system, heat accommodation method, energy management system and program

Abstract

To perform heat exchange between a plurality of buildings to improve operation efficiency of a heat source machine of each building.SOLUTION: In a heat exchange system that exchanges heat between a plurality of buildings including a first building and a second building that comprise a heat source machine having a heat source pump and an air conditioner, the heat source machine and air conditioner in the first building are connected to the heat source machine and air conditioner in the second building via a heat exchange pipe for conveying a heat medium. The heat exchange system predicts the heat demand of the first building and the second building; based on the heat demand of the first building and the second building, formulates an operation plan for the heat source machine and heat source pump of the first building and an operation plan of the heat source machine and heat source pump of the second building; generates and outputs an operation command for the heat source machine and heat source pump of the first building; and generates and outputs an operation command for the heat source machine and heat source pump of the second building.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heat accommodation system, a heat accommodation method, an energy management system, and a program. [Background technology]

[0002] Conventional methods of supplying heat to buildings include "heat supply to a single building" and "district heat supply." One issue with "heat supply to a single building" is the reduced efficiency of heat source equipment at low loads. Furthermore, when supplying heat to a single district as a district heat supply (district heating and cooling) facility, the heat source equipment can be operated efficiently, but the heat transport requires a great deal of energy, making it difficult to improve the efficiency of the entire system. In other words, it is necessary to optimize the reduction in energy consumption by the heat source equipment and the increase in pump power due to heat accommodation.

[0003] When using renewable or unused energy sources such as geothermal or solar heat as heat sources in buildings such as offices, these devices can be used effectively when the building is in operation on weekdays, but cannot be used effectively on holidays or other days when the building is not in operation or there is little heat demand. This requires planning to limit the installed capacity of the devices, which becomes a constraint on the introduction of devices that use renewable or unused energy.

[0004] In the technology described in Patent Document 1, an air-conditioning heat load prediction value is calculated, indicating the amount of heat predicted to be used to adjust the temperature to a predetermined set temperature on the prediction date. Power generation output prediction data is calculated, indicating the power generated by a generator on the prediction date. An air-conditioning heat source operation plan is created, indicating the time-of-day allocation of operation of each air-conditioning heat source equipment device that generates the amount of heat indicated by the air-conditioning heat load prediction value. A power load prediction value is calculated, indicating the power to be supplied to a load device to generate the predicted amount of heat indicated by the air-conditioning heat load prediction value, based on the air-conditioning heat load prediction value. A power supply equipment operation plan is created, indicating a schedule for the power output by the generator and the purchased power source, by determining the purchased power and generated power corresponding to the power of the power load prediction value using the power generation output prediction data, so that the purchased power supplied from a purchased power source in a commercial power system at a predetermined fixed time interval reaches an arbitrary target value. The technology described in Patent Document 1 is limited to the function of efficient operation of the energy supply side (primary side) of a single building, and does not include control of the transport power for heat accommodation between multiple buildings or efficient operation of the load side (secondary side) of the buildings. Therefore, the technology described in Patent Document 1 does not provide comprehensive control of the entire building, and there are issues with comprehensive control of the entire building and integrated control of groups of buildings, which needs to be further developed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-080679 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above, the present invention aims to provide a heat accommodation system, a heat accommodation method, an energy management system, and a program that can improve the operating efficiency of heat source machines in multiple buildings by exchanging heat between multiple buildings. [Means for solving the problem]

[0007] One aspect of the present invention is a heat accommodation system that performs heat accommodation between a plurality of buildings including at least a first building and a second building, wherein the first building is provided with a heat source machine having at least a heat source pump and an air conditioner having a secondary pump, and the second building is provided with a heat source machine having at least a heat source pump and an air conditioner having a secondary pump, the heat source machine and the air conditioner of the first building are connected to the heat source machine and the air conditioner of the second building via heat accommodation piping for transporting a heat medium, and the heat demand of the first building is predicted based on at least any of an operating history of the heat source machine of the first building, external information of the first building, and internal information of the first building including operating information of the air conditioners of the first building, and the heat demand of the first building is predicted based on at least any of an operating history of the heat source machine of the second building, external information of the second building, and internal information of the second building including operating information of the air conditioners of the first building, and a heat demand prediction unit that predicts the heat demand of the second building based on at least one of the pieces of information; an operation plan formulation unit that formulates an operation plan for at least the heat source machine and the heat source pump of the first building and an operation plan for at least the heat source machine and the heat source pump of the second building based on the heat demand of the first building and the heat demand of the second building predicted by the heat demand prediction unit; and a monitoring unit that generates and outputs operation commands for at least the heat source machine and the heat source pump of the first building based on the operation plan for at least the heat source machine and the heat source pump of the first building formulated by the operation plan formulation unit, and generates and outputs operation commands for at least the heat source machine and the heat source pump of the second building based on the operation plan for at least the heat source machine and the heat source pump of the second building formulated by the operation plan formulation unit.

[0008] One aspect of the present invention is a heat accommodation method for exchanging heat between a plurality of buildings including at least a first building and a second building, wherein the first building is equipped with a heat source unit having at least a heat source pump and an air conditioner having a secondary pump, and the second building is equipped with a heat source unit having at least a heat source pump and an air conditioner having a secondary pump, the heat source unit and the air conditioner of the first building are connected to the heat source unit and the air conditioner of the second building via heat accommodation piping for transporting a heat medium, and the heat demand of the first building is predicted based on at least any of an operating history of the heat source unit of the first building, external information about the first building, and internal information of the first building including operating information of the air conditioners of the first building, and the heat demand of the first building is predicted based on at least any of an operating history of the heat source unit of the second building, external information about the second building, and internal information of the second building including operating information of the air conditioners of the second building, a heat demand prediction step of predicting the heat demand of the second building based on either the heat demand of the first building or the heat demand of the second building; an operation plan formulation step of formulating an operation plan for at least the heat source machine and the heat source pump of the first building and an operation plan for at least the heat source machine and the heat source pump of the second building based on the heat demand of the first building and the heat demand of the second building predicted in the heat demand prediction step; and a monitoring step of generating and outputting operation commands for at least the heat source machine and the heat source pump of the first building based on the operation plan for at least the heat source machine and the heat source pump of the first building formulated in the operation plan formulation step, and generating and outputting operation commands for at least the heat source machine and the heat source pump of the second building based on the operation plan for at least the heat source machine and the heat source pump of the second building formulated in the operation plan formulation step.

[0009] One aspect of the present invention is an energy management system that manages heat accommodation between a plurality of buildings including at least a first building and a second building, wherein the first building is equipped with a heat source machine having at least a heat source pump and an air conditioner having a secondary pump, and the second building is equipped with a heat source machine having at least a heat source pump and an air conditioner having a secondary pump, and the heat source machine and air conditioner of the first building and the heat source machine and air conditioner of the second building are connected via heat accommodation piping for transporting a heat medium, and the energy management system predicts the heat demand of the first building based on at least any of an operating history of the heat source machine of the first building, external information about the first building, and internal information about the first building including operating information of the air conditioners of the first building, and calculates the heat demand of the first building based on at least any of an operating history of the heat source machine of the second building, external information about the second building, and internal information about the second building including operating information of the air conditioners of the second building and an operation plan formulation unit that formulates an operation plan for at least the heat source machines and heat source pumps of the first building and an operation plan for at least the heat source machines and heat source pumps of the second building based on the heat demand of the first building and the heat demand of the second building predicted by the heat demand prediction unit, wherein operation commands for at least the heat source machines and heat source pumps of the first building are created by a monitoring unit based on the operation plan for at least the heat source machines and heat source pumps of the first building formulated by the operation plan formulation unit and are output by the monitoring unit, and operation commands for at least the heat source machines and heat source pumps of the second building are created by the monitoring unit based on the operation plan for at least the heat source machines and heat source pumps of the second building formulated by the operation plan formulation unit and are output by the monitoring unit.

[0010] In one aspect of the present invention, a computer constituting an energy management system for managing heat exchange between a plurality of buildings including at least a first building equipped with a heat source machine having at least a heat source pump and an air conditioner having a secondary pump, and a second building equipped with a heat source machine having at least a heat source pump and an air conditioner having a secondary pump, is provided with a heat demand prediction step for predicting the heat demand of the first building based on at least one of an operation record of the heat source machine of the first building, external information of the first building, and internal information of the first building including operation information of the air conditioner of the first building, and predicting the heat demand of the second building based on at least one of an operation record of the heat source machine of the second building, external information of the second building, and internal information of the second building including operation information of the air conditioner of the second building; and a heat demand prediction step for predicting the heat demand of the first building based on the heat demand of the first building and the heat demand of the second building predicted in the heat demand prediction step. The program is for executing an operation plan formulation step of formulating an operation plan for at least a heat source machine and a heat source pump and an operation plan for at least a heat source machine and a heat source pump of the second building, wherein the heat source machine and air conditioner of the first building and the heat source machine and air conditioner of the second building are connected via heat accommodation piping for transporting a heat medium, and operation commands for at least the heat source machine and the heat source pump of the first building are created by a monitoring unit based on the operation plan for at least the heat source machine and the heat source pump of the first building formulated in the operation plan formulation step and output by the monitoring unit, and operation commands for at least the heat source machine and the heat source pump of the second building are created by the monitoring unit based on the operation plan for at least the heat source machine and the heat source pump of the second building formulated in the operation plan formulation step and output by the monitoring unit. [Effects of the Invention]

[0011] According to the present invention, heat accommodation is performed between a plurality of buildings, thereby making it possible to improve the operating efficiency of the heat source machines in each of the plurality of buildings. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram illustrating an example of a heat accommodation system 1 according to a first embodiment. [Figure 2] 2 is a diagram showing an example of expressing a part of the heat accommodation system 1 of the first embodiment shown in FIG. 1 using an electric circuit. FIG. [Figure 3] 2 is a diagram showing an example of a data flow in the energy management system 1-1 shown in FIG. [Figure 4] 4 is a flowchart illustrating an example of processing executed in the heat accommodation system 1 of the first embodiment. [Figure 5] FIG. 10 is a diagram showing an example of expressing a part of the heat accommodation system 1 of the third embodiment using an electric circuit. [Figure 6] FIG. 10 is a diagram illustrating an example of a heat accommodation system 1 according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of a heat accommodation system, a heat accommodation method, an energy management system, and a program according to the present invention will be described with reference to the drawings.

[0014] [First embodiment] Fig. 1 is a diagram showing an example of a heat accommodation system 1 according to a first embodiment. Fig. 2 is a diagram showing an example of expressing a part of the heat accommodation system 1 according to the first embodiment shown in Fig. 1 using an electric circuit.

[0015] 1 and 2, a heat accommodation system 1 performs heat accommodation between a building 11, a building 12, and a building 13. The building 11 is equipped with a heat source unit 11A having a heat source pump 11A1, a supply header 11B, an air conditioner 11C having a secondary pump 11C1, a return header 11D, and a solar heat utilization system 11E. In the example shown in FIGS. 1 and 2, the solar heat utilization system 11E is disposed in the building 11, but in other examples, the solar heat utilization system 11E does not have to be disposed in the building 11.

[0016] In the example shown in Figures 1 and 2, a building 12 is equipped with a heat source unit 12A having a heat source pump 12A1, a forward header 12B, an air conditioner 12C having a secondary pump 12C1, a return header 12D, and a geothermal energy utilization system 12E. In the example shown in FIGS. 1 and 2, the geothermal energy utilization system 12E is disposed in the building 12, but in other examples, the geothermal energy utilization system 12E does not have to be disposed in the building 12.

[0017] In the example shown in Figures 1 and 2, a building 13 is equipped with a heat source unit 13A having a heat source pump 13A1, a forward header 13B, an air conditioner 13C having a secondary pump 13C1, a return header 13D, and an unused energy utilization system 13E. In the example shown in Figures 1 and 2, the unused energy utilization system 13E is installed in the building 13, but in other examples, the unused energy utilization system 13E does not have to be installed in the building 13.

[0018] 1 and 2, the heat source unit 11A and the air conditioner 11C of the building 11, the heat source unit 12A and the air conditioner 12C of the building 12, and the heat source unit 13A and the air conditioner 13C of the building 13 are connected via heat accommodation piping 17 for transporting a heat medium. In detail, in the example shown in Fig. 2, the heat source unit 11A and the air conditioner 11C of the building 11 and the heat source unit 12A and the air conditioner 12C of the building 12 are connected via the outbound header 11B of the building 11, the heat accommodation piping 17A1, and the outbound header 12B of the building 12, and are also connected via the return header 11D of the building 11, the heat accommodation piping 17A2, and the return header 12D of the building 12. In addition, the heat source unit 12A and air conditioner 12C of building 12 are connected to the heat source unit 13A and air conditioner 13C of building 13 via the forward header 12B of building 12, the heat accommodation piping 17B1, and the forward header 13B of building 13, and are also connected via the return header 12D of building 12, the heat accommodation piping 17B2, and the return header 13D of building 13. 1 and 2, the heat accommodation system 1 performs heat accommodation between multiple heat sources and multiple buildings. That is, the distributed heat source systems (heat source units 11A, 12A, 13A) are connected via heat accommodation piping 17, and area-wide heat accommodation is performed.

[0019] 1 and 2, the heat accommodation system 1 includes an energy management system 1-1. The energy management system 1-1 includes a heat demand prediction unit 1A, an operation plan formulation unit 1B, and a monitoring unit 1C.

[0020] FIG. 3 is a diagram showing an example of a data flow in the energy management system 1-1 shown in FIG. In the example shown in FIGS. 1 to 3, the heat demand prediction unit 1A predicts the heat demand of the building 11 based on the operation record of the heat source unit 11A of the building 11, external information about the building 11, and internal information about the building 11 including operation information about the air conditioner 11C of the building 11. The operation record of the heat source unit 11A of the building 11 includes, for example, operation history data of the heat source unit 11A (measurement and metering records). The external information about the building 11 includes, for example, a weather forecast and facility usage information about the building 11. The internal information about the building 11 includes, for example, operation information about the air conditioner 11C of the building 11, location information of users within the building 11, and the like. In the example shown in Figure 3, external information about building 11, such as weather forecasts and facility usage information, is input to the heat demand prediction unit 1A, thereby improving the accuracy of heat demand prediction compared to when this information is not input. In addition, in the example shown in Figure 3, internal information of building 11, such as operating information of air conditioner 11C in building 11 and location information of users within building 11, is input into heat demand prediction unit 1A, thereby improving the accuracy of heat demand prediction compared to when this information is not input. In the example shown in Figure 3, the heat demand prediction unit 1A predicts the heat demand of building 11 based on the operating history of heat source unit 11A of building 11, external information of building 11, and internal information of building 11 including operating information of air conditioner 11C of building 11, but in other examples, the heat demand prediction unit 1A may predict the heat demand of building 11 based on at least one of the operating history of heat source unit 11A of building 11, external information of building 11, and internal information of building 11 including operating information of air conditioner 11C of building 11. In the example shown in Fig. 3, the heat demand prediction unit 1A is configured by an AI (artificial intelligence) prediction server. That is, in the example shown in Fig. 3, the heat demand prediction unit 1A predicts the heat demand of multiple buildings using a method that uses AI. In other examples, the heat demand prediction unit 1A may predict the heat demand of multiple buildings without using AI.

[0021] In the example shown in FIGS. 1 to 3, the heat demand prediction unit 1A predicts the heat demand of the building 12 based on the operation record of the heat source unit 12A of the building 12, external information about the building 12, and internal information about the building 12 including operation information of the air conditioner 12C of the building 12. The operation record of the heat source unit 12A of the building 12 includes, for example, operation history data of the heat source unit 12A (measurement and metering records). The external information about the building 12 includes, for example, a weather forecast and facility usage information about the building 12. The internal information about the building 12 includes, for example, operation information of the air conditioner 12C of the building 12, location information of users within the building 12, and the like. Furthermore, the heat demand prediction unit 1A predicts the heat demand of the building 13 based on the operating history of the heat source unit 13A of the building 13, external information about the building 13, and internal information about the building 13 including operating information about the air conditioner 13C of the building 13. The operating history of the heat source unit 13A of the building 13 includes, for example, operating history data (measurement and metering results) of the heat source unit 13A. The external information about the building 13 includes, for example, weather forecasts and facility usage information for the building 13. The internal information about the building 13 includes, for example, operating information about the air conditioner 13C of the building 13, location information of users within the building 13, and the like. That is, the actual operating records of heat source machines 11A, 12A, and 13A (operating history data, measurement and weighing records, etc.), external information of buildings 11, 12, and 13 (weather forecast and facility usage information), and internal information of buildings 11, 12, and 13 (air conditioning operation information and location information) are input into the AI ​​prediction server that constitutes heat demand prediction unit 1A, and the AI ​​prediction server predicts the heat demand of buildings 11, 12, and 13. Therefore, the AI ​​prediction server can improve its prediction accuracy through daily learning.

[0022] In the example shown in Figures 1 to 3, the operation plan formulation unit 1B formulates an operation plan for the heat source unit 11A and heat source pump 11A1 of building 11, an operation plan for the heat source unit 12A and heat source pump 12A1 of building 12, and an operation plan for the heat source unit 13A and heat source pump 13A1 of building 13 based on the heat demand of building 11, the heat demand of building 12, and the heat demand of building 13 predicted by the heat demand prediction unit 1A. In detail, as shown in FIG. 2, the operation plan formulation unit 1B replaces the heat source pump 11A1 and the secondary side pump 11C1 of the building 11 with a first building heat source pump current source which is a current source corresponding to the heat source pump 11A1 of the building 11 connected in antiparallel and a first building secondary side pump current source which is a current source corresponding to the secondary side pump 11C1 of the building 11, and also corresponds the heat demand of the building 11 predicted by the heat demand prediction unit 1A to the current value Il1 of the first building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 11, the greater the current value Il1 of the first building secondary side pump current source), and formulates the operation plan of the heat source pump 11A1 of the building 11 formulated by the operation plan formulation unit 1B based on the current value Ig of the first building heat source pump current source. 1a (That is, the current value Ig of the first building heat source pump current source) 1a It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 11A1 of the building 11.

[0023] Furthermore, the operation plan formulation unit 1B replaces the heat source pump 12A1 and the secondary side pump 12C1 of the building 12 with a second building heat source pump current source which is a current source equivalent to the heat source pump 12A1 of the building 12 connected in antiparallel, and a second building secondary side pump current source which is a current source equivalent to the secondary side pump 12C1 of the building 12, and also corresponds the heat demand of the building 12 predicted by the heat demand prediction unit 1A to the current value Il2 of the second building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 12, the greater the current value Il2 of the second building secondary side pump current source), and formulates the operation plan of the heat source pump 12A1 of the building 12 formulated by the operation plan formulation unit 1B based on the current value Ig of the second building heat source pump current source. 2b (i.e., the current value Ig of the second building heat source pump current source) 2b It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 12A1 of the building 12. Similarly, the operation plan formulation unit 1B replaces the heat source pump 13A1 and the secondary side pump 13C1 of the building 13 with a third building heat source pump current source which is a current source equivalent to the heat source pump 13A1 of the building 13 connected in antiparallel, and a third building secondary side pump current source which is a current source equivalent to the secondary side pump 13C1 of the building 13, and corresponds the heat demand of the building 13 predicted by the heat demand prediction unit 1A to the current value Il3 of the third building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 13, the greater the current value Il3 of the third building secondary side pump current source), and formulates the operation plan of the heat source pump 13A1 of the building 13 formulated by the operation plan formulation unit 1B based on the current value Ig 3c (That is, the current value Ig of the heat pump current source of the third building 3c It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 13A1 of the building 13.

[0024] Furthermore, the operation plan formulation unit 1B corresponds the piping resistance of the heat medium transported through the heat accommodation piping 17A1, 17A2, 17B1, 17B2 connecting the heat source unit 11A and air conditioner 11C of building 11, the heat source unit 12A and air conditioner 12C of building 12, and the heat source unit 13A and air conditioner 13C of building 13 to the resistance values ​​(shown by symbols R1 and R2 in Figure 2) of the wiring connecting the first building heat source pump current source and the first building secondary side pump current source connected in anti-parallel, the second building heat source pump current source and the second building secondary side pump current source connected in anti-parallel, and the third building heat source pump current source and the third building secondary side pump current source connected in anti-parallel (in other words, it is considered that the greater the difficulty in the flow of the heat medium in the heat accommodation piping 17A1, 17A2, 17B1, 17B2, the greater the resistance values ​​R1 and R2 of the wiring). The operation plan formulation unit 1B also calculates a current value Ig of the first building heat source pump current source in an electric circuit including the first building heat source pump current source and the first building secondary side pump current source connected in anti-parallel, the second building heat source pump current source and the second building secondary side pump current source connected in anti-parallel, the third building heat source pump current source and the third building secondary side pump current source connected in anti-parallel, and wiring. 1a , the current value Ig of the second building heat source pump current source 2b and the current value Ig of the heat pump current source in the third building 3c Calculate.

[0025] Based on these, the operation plan formulation unit 1B determines the current value Ig of the first building heat source pump current source. 1a The operation plan of the heat source pump 11A1 of the building 11 corresponding to the current value Ig of the current source of the heat source pump of the second building 2b The operation plan of the heat source pump 12A1 of the building 12 corresponding to the current value Ig of the current source of the heat source pump of the third building 3c An operation plan for the heat source pump 13A1 of the building 13 corresponding to the above is formulated. In other words, the operation plan formulation unit 1B formulates operation plans for the heat source units 11A, 12A, 13A and heat source pumps 11A1, 12A1, 13A1 of buildings 11, 12, 13 based on the predicted heat demand results of buildings 11, 12, 13 input to the operation plan formulation unit 1B from the AI ​​prediction server, and outputs the plans to the monitoring unit 1C. In another example, the operation plan formulation unit 1B may calculate the current value Il1 of the first building secondary-side pump current source, the current value Il2 of the second building secondary-side pump current source, and the current value Il3 of the third building secondary-side pump current source in an electrical circuit including a first building heat source pump current source and a first building secondary-side pump current source connected in anti-parallel, a second building heat source pump current source and a second building secondary-side pump current source connected in anti-parallel, a third building heat source pump current source and a third building secondary-side pump current source connected in anti-parallel, and wiring, and based on these, formulate an operation plan for the secondary-side pump 11C1 of building 11 corresponding to the current value Il1 of the first building secondary-side pump current source, an operation plan for the secondary-side pump 12C1 of building 12 corresponding to the current value Il2 of the second building secondary-side pump current source, and an operation plan for the secondary-side pump 13C1 of building 13 corresponding to the current value Il3 of the third building secondary-side pump current source. That is, in this example, the operation plan formulation unit 1B formulates operation plans for the air conditioners 11C, 12C, and 13C and secondary pumps 11C1, 12C1, and 13C1 of the buildings 11, 12, and 13, and outputs them to the monitoring unit 1C.

[0026] In the example shown in FIGS. 1 to 3, the monitoring unit 1C generates and outputs operation commands for the heat source unit 11A and the heat source pump 11A1 of the building 11 based on the operation plan for the heat source unit 11A and the heat source pump 11A1 of the building 11 formulated by the operation plan formulation unit 1B. The monitoring unit 1C also generates and outputs operation commands for the heat source unit 12A and the heat source pump 12A1 of the building 12 based on the operation plan for the heat source unit 12A and the heat source pump 12A1 of the building 12 formulated by the operation plan formulation unit 1B. The monitoring unit 1C also generates and outputs operation commands for the heat source unit 13A and the heat source pump 13A1 of the building 13 based on the operation plan for the heat source unit 13A and the heat source pump 13A1 of the building 13 formulated by the operation plan formulation unit 1B. 1 to 3, operation plan formulation unit 1B formulates a heat source operation plan that optimally controls the number of operating units and operating capacity of heat source units 11A, 12A, and 13A and heat source pumps 11A1, 12A1, and 13A1 in buildings 11, 12, and 13 based on the heat demand forecast for buildings 11, 12, and 13, and monitoring unit 1C outputs operation commands to heat source units 11A, 12A, and 13A and heat source pumps 11A1, 12A1, and 13A1 to control the operation of heat source units 11A, 12A, and 13A and heat source pumps 11A1, 12A1, and 13A1. That is, monitoring unit 1C controls the operation of heat source units 11A, 12A, and 13A and heat source pumps 11A1, 12A1, and 13A1 based on the heat source operation plan (number of operating units, operating capacity) formulated by operation plan formulation unit 1B. As a result, in the example shown in Figures 1 to 3, by sharing heat between the three buildings 11, 12, and 13, the operating efficiency of the heat source units 11A, 12A, and 13A and heat source pumps 11A1, 12A1, and 13A1 in each of the buildings 11, 12, and 13 can be improved.

[0027] Specifically, in the example shown in FIG. 3, the AI ​​prediction server constituting the heat demand prediction unit 1A outputs the heat demand prediction results for buildings 11, 12, and 13 every 30 minutes. Furthermore, the operation plan formulation unit 1B formulates operation plans for the heat source units 11A, 12A, and 13A and the heat source pumps 11A1, 12A1, and 13A1 of buildings 11, 12, and 13 based on the 24-hour heat demand prediction results for buildings 11, 12, and 13 output every 30 minutes from the AI ​​prediction server. Therefore, the operation plans for the heat source units 11A, 12A, and 13A and the heat source pumps 11A1, 12A1, and 13A1 of buildings 11, 12, and 13 can be formulated more appropriately than when an operation plan is formulated based on only the 30-minute heat demand prediction results for buildings 11, 12, and 13. In addition, in the example shown in Figure 3, the monitoring unit 1C controls the operation of the heat source units 11A, 12A, 13A and heat source pumps 11A1, 12A1, 13A1 of buildings 11, 12, 13 based on the operation plans of the heat source units 11A, 12A, 13A and heat source pumps 11A1, 12A1, 13A1 of buildings 11, 12, 13 formulated by the operation plan formulation unit 1B, and the heat demand prediction unit 1A corrects the heat demand of buildings 11, 12, 13 on the day based on the operating history of the heat source units 11A, 12A, 13A and heat source pumps 11A1, 12A1, 13A1 of buildings 11, 12, 13. Therefore, it is possible to formulate an appropriate operation plan that reflects the operating record of the heat source units 11A, 12A, and 13A and the heat source pumps 11A1, 12A1, and 13A1 of the buildings 11, 12, and 13, and to perform real-time operation control.

[0028] In the example shown in FIG. 3, the heat demand forecast results are output every 30 minutes, but in other examples, the heat demand forecast results may be output at any time interval, such as every hour, every 10 minutes, etc. For example, if the heat demand prediction unit 1A outputs a small value as the predicted result of the heat demand of the building 11 (i.e., if the heat demand prediction unit 1A predicts that the heat demand of the building 11 is small), the operation plan formulation unit 1B formulates an operation plan in which the flow rate of the heat source pump 11A1 of the heat source unit 11A of the building 11 is set to a small value. As a result, highly efficient operation of the heat source unit 11A of the building 11 can be realized. That is, for example, by forcibly throttling the flow rate 11A1 of the heat source pump by a flow rate signal from the monitoring unit 1C (central monitoring device) to the heat source pump 11A1, the heat source unit 11A can be operated at the most efficient point. In the example shown in FIG. 3, the monitoring unit 1C acquires operating data of the heat source units 11A, 12A, and 13A in the buildings 11, 12, and 13. The operating data of the heat source units 11A, 12A, and 13A in the buildings 11, 12, and 13 includes the transport power of the heat source pumps 11A1, 12A1, and 13A1 of the heat source units 11A, 12A, and 13A in the buildings 11, 12, and 13. The monitoring unit 1C can perform operations that optimize heat generation and heat transport by evaluating the transport power of the heat source pumps 11A1, 12A1, and 13A1 of the heat source units 11A, 12A, and 13A in the buildings 11, 12, and 13. The operating data of the heat source units 11A, 12A, and 13A in the buildings 11, 12, and 13 acquired by the monitoring unit 1C is detected, for example, by a sensor (not shown). In another example, the operating data of the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13 acquired by the monitoring unit 1C may be estimated based on the operating signals output from the monitoring unit 1C to the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13. Operation data of the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13 acquired by the monitoring unit 1C may be accumulated as actual heat source operation data and utilized for subsequent heat demand prediction by the heat demand prediction unit 1A.

[0029] In more detail, in the example shown in FIGS. 1 to 3, the heat accommodation system 1 accommodates heat between multiple heat sources and multiple buildings, thereby consolidating heat source operation during low load times. This improves the operating efficiency of the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13. On the other hand, during high load times, heat is supplied directly from the self-heat source (specifically, heat is supplied from the heat source unit 11A of the building 11 to the air conditioner 11C, heat is supplied from the heat source unit 12A of the building 12 to the air conditioner 12C, and heat is supplied from the heat source unit 13A of the building 13 to the air conditioner 13C). This improves heat transfer efficiency.

[0030] In the example shown in Figure 1, the heat accommodation system 1 accommodates heat between multiple heat sources and multiple buildings, so that solar heat (renewable energy) collected by the solar thermal utilization system 11E of building 11 can be utilized in buildings 12 and 13, geothermal heat (renewable energy) extracted from the ground by the geothermal utilization system 12E of building 12 can be utilized in buildings 11 and 13, and exhaust heat (unutilized energy) recovered by the unused energy utilization system 13E of building 13 can be utilized in buildings 11 and 12. In another example, the heat accommodation system 1 can achieve peak shifting and improve energy production efficiency by linking with a heat storage tank (not shown).

[0031] 1 to 3, the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13 are electric heat sources that use electricity, but in other examples, the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13 may be a combination of an electric heat source and a gas heat source. In this example, the heat accommodation system 1 can perform optimal control according to objectives such as CO2 reduction, running cost reduction, energy conservation, maximum utilization of natural energy, and demand control. In yet another example, the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13 may be connected to a power generation system (not shown) such as hydrogen and gas cogeneration or a device that generates exhaust heat. Gas cogeneration, as described on the website indicated at the URL below, is a system that uses city gas as fuel to generate electricity using engines, turbines, fuel cells, etc., and also converts the thermal energy generated during this process into steam or hot water for use. https: / / www.gas.or.jp / gas-life / cogeneration /

[0032] In another example, the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13 may be controlled according to the balance of power supply and demand by coordinating with a power network control such as that described on the website indicated at the URL below. https: / / www.shimz.co.jp / solution / tech082 /

[0033] For example, when a power generation facility (cogeneration) that generates exhaust heat, such as that described on the website indicated by the above URL, is linked to the heat accommodation system 1 of the first embodiment (heat source units 11A, 12A, 13A in buildings 11, 12, 13) and power network control, the heat source operation plan (cogeneration power generation amount) may be input from the heat accommodation system 1 of the first embodiment to the power network control system. In this example, the power network control system formulates a power network control plan (prediction of energy generation amount) that takes into account the amount of power generated by cogeneration, and outputs the result to the heat accommodation system 1 of the first embodiment. The heat accommodation system 1 of the first embodiment receives the power network control plan input from the power network control system, and corrects the operation plan of the heat source.

[0034] In the example shown in Figures 1 to 3, the operation plan formulation unit 1B of the energy management system 1-1 uses an optimization method for solving optimization problems such as linear programming and mathematical programming problems, as described on the website indicated by the URL below, as a method for totally optimizing the power of the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13, as well as the power required for heat accommodation. https: / / www.msi.co.jp / nuopt / introduction / algorithm / lp.html

[0035] The hydraulic power [kW] of a pump such as the heat source pump 11A1 can be expressed by the following formula (1), where ρ is the fluid density [kg / m 3 ], F: Pump flow rate [m 3 / min], H: total head [m]. Water power=0.1634ρFH / 1000 (1)

[0036] 1 to 3, the pump efficiency η is assumed to be constant. The shaft power [kW] can be expressed by the following equation (2). Shaft power=0.1634ρFH / (1000η) (2)

[0037] Furthermore, in the examples shown in Figures 1 to 3, the temperature difference ΔT of the thermal fluid is assumed to be constant. The shaft power [kW] can be considered as shown in the following equation (3), and the pump power is the flow rate Q [m 3 / h] and the total head H [m] (α is a constant). Shaft power=αQH (3)

[0038] 1 to 3, the heat accommodation pipe 17 is considered to be a closed circuit, and the total head H is considered to be equal to the pipe resistance. The pipe resistance is proportional to the square of the flow rate and can be expressed as the following equation (4). Total head = piping resistance = βQ 2 (4)

[0039] To formulate this using linear programming, for example, it is necessary to linearly approximate it to a first-order equation. In the example shown in Figures 1 to 3, the relationship between the total head H and the flow rate Q is expressed as a linear approximation of the following first-order equation (5) (β is a constant). Specifically, it is expressed by connecting all sections of the quadratic curve with a linear straight line equation for each section. Total lifting head=βQ (5)

[0040] As a result, in the example shown in Figures 1 to 3, the heat source pump 11A1 of the heat source unit 11A of the building 11 and the secondary pump 11C1 of the air conditioner 11C of the first embodiment of the heat accommodation system 1, the heat source pump 12A1 of the heat source unit 12A of the building 12 and the secondary pump 12C1 of the air conditioner 12C, the heat source pump 13A1 of the heat source unit 13A of the building 13 and the secondary pump 13C1 of the air conditioner 13C, and the heat accommodation piping 17 are replaced with the first building heat source pump current source and the first building secondary pump current source, the second building heat source pump current source and the second building secondary pump current source, the third building heat source pump current source and the third building secondary pump current source, wiring having a resistance value R1, and wiring having a resistance value R2 of the electrical circuit shown in Figure 2.

[0041] As shown in FIG. 2, the flow rate of the heat source pump 11A1 of the building 11 is determined by the current value Ig of the first building heat source pump current source corresponding to the heat source pump 11A1 of the building 11. 1a and the flow rate of the secondary pump 11C1 of the building 11 is replaced by the current value Il1 of the first building secondary pump current source corresponding to the secondary pump 11C1 of the building 11. The flow rate of the heat source pump 12A1 of the building 12 is replaced by the current value Ig 2b and the flow rate of the secondary pump 12C1 of the building 12 is replaced by the current value Il2 of the second building secondary pump current source corresponding to the secondary pump 12C1 of the building 12. The flow rate of the heat source pump 13A1 of the building 13 is replaced by the current value Ig 3c and the flow rate of the secondary pump 13C1 of the building 13 is replaced by the current value Il3 of the third building secondary pump current source corresponding to the secondary pump 13C1 of the building 13. Furthermore, the operation plan formulation unit 1B formulates equations (not shown) equivalent to equations (6) and (8) described below using linear programming, and optimizes them in conjunction with the power consumption of the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13, thereby making it possible to formulate optimal operation plans for the heat source units 11A, 12A, and 13A of the buildings 11, 12, and 13, taking into account the power consumed for heat accommodation.

[0042] FIG. 4 is a flowchart illustrating an example of processing executed in the heat accommodation system 1 of the first embodiment. In the example shown in Figure 4, in step S1, the heat demand prediction unit 1A of the energy management system 1-1 predicts the heat demand of building 11 based on internal information of building 11 including the operating history of heat source unit 11A of building 11, external information of building 11, and operating information of air conditioner 11C of building 11, predicts the heat demand of building 12 based on internal information of building 12 including the operating history of heat source unit 12A of building 12, external information of building 12, and operating information of air conditioner 12C of building 12, and predicts the heat demand of building 13 based on internal information of building 13 including the operating history of heat source unit 13A of building 13, external information of building 13, and operating information of air conditioner 13C of building 13. Next, in step S2, the operation plan formulation unit 1B of the energy management system 1-1 formulates an operation plan for the heat source unit 11A and heat source pump 11A1 of building 11, an operation plan for the heat source unit 12A and heat source pump 12A1 of building 12, and an operation plan for the heat source unit 13A and heat source pump 13A1 of building 13 based on the heat demand of building 11, the heat demand of building 12, and the heat demand of building 13 predicted in step S1. Next, in step S3, the monitoring unit 1C of the energy management system 1-1 generates and outputs operation commands for the heat source unit 11A and heat source pump 11A1 of building 11 based on the operation plan for the heat source unit 11A and heat source pump 11A1 of building 11 formulated in step S2, generates and outputs operation commands for the heat source unit 12A and heat source pump 12A1 of building 12 based on the operation plan for the heat source unit 12A and heat source pump 12A1 of building 12 formulated in step S2, and generates and outputs operation commands for the heat source unit 13A and heat source pump 13A1 of building 13 based on the operation plan for the heat source unit 13A and heat source pump 13A1 of building 13 formulated in step S2.

[0043] As described above, according to the heat accommodation system 1 of the first embodiment, energy conservation and redundancy can be achieved by performing heat accommodation between a plurality of heat sources and a plurality of buildings. Furthermore, in the heat accommodation system 1 of the first embodiment, as described above, solar heat (renewable energy) collected by the solar heat utilization system 11E of the building 11 can be utilized in the buildings 12 and 13, and geothermal heat (renewable energy) extracted from the ground by the geothermal heat utilization system 12E of the building 12 can be utilized in the buildings 11 and 13. In other words, the energy-saving effect obtained by introducing natural energy equipment is increased, which can promote the introduction of natural energy equipment. Furthermore, in the heat accommodation system 1 of the first embodiment, as described above, the heat demand prediction unit 1A corrects the heat demand of the buildings 11, 12, and 13 on the day based on the operation records of the heat source units 11A, 12A, and 13A and the heat source pumps 11A1, 12A1, and 13A1 of the buildings 11, 12, and 13. Therefore, the operation plan formulation unit 1B can formulate and output an optimal operation plan in real time, and the monitoring unit 1C can appropriately operate the heat source units 11A, 12A, and 13A and the heat source pumps 11A1, 12A1, and 13A1 of the buildings 11, 12, and 13 based on the optimal operation plan.

[0044] In the first example of the heat accommodation system 1 of the first embodiment described above, an energy management system 1-1 equipped with a heat demand prediction unit 1A, an operation plan formulation unit 1B, and a monitoring unit 1C is installed in one of the buildings 11, 12, and 13, or in a building other than the buildings 11, 12, and 13 (not shown). In a second example of the heat accommodation system 1 of the first embodiment, the heat demand prediction unit 1A and the operation plan formulation unit 1B of the energy management system 1-1 may be placed in the cloud, and the monitoring unit 1C of the energy management system 1-1 may be placed in each of the buildings 11, 12, and 13 in a distributed manner. In a third example of the heat accommodation system 1 of the first embodiment, the heat demand prediction unit 1A and the operation plan formulation unit 1B of the energy management system 1-1 may be located in one of the buildings 11, 12, and 13, and the monitoring unit 1C of the energy management system 1-1 may be located in a distributed manner in each of the buildings 11, 12, and 13. In the fourth example of the heat accommodation system 1 of the first embodiment, the arrangement and configuration of the heat demand prediction unit 1A, operation plan formulation unit 1B, and monitoring unit 1C of the energy management system 1-1 may be different from the arrangement and configuration of the heat demand prediction unit 1A, operation plan formulation unit 1B, and monitoring unit 1C of the energy management systems 1-1 of the first to third examples.

[0045] [Second embodiment] A second embodiment of the heat accommodation system, the heat accommodation method, the energy management system, and the program of the present invention will be described below. The heat accommodation system 1 of the second embodiment is configured similarly to the heat accommodation system 1 of the first embodiment described above, except for the points described below. Therefore, the heat accommodation system 1 of the second embodiment can achieve the same effects as the heat accommodation system 1 of the first embodiment described above, except for the points described below.

[0046] As described above, in the first embodiment of the heat accommodation system 1, heat accommodation is performed between building 11, building 12, and building 13, while in the second embodiment of the heat accommodation system 1, heat accommodation is performed between building 11 and building 12. In other words, in the heat accommodation system 1 of the second embodiment, the heat accommodation piping 17B1, 17B2 and the building 13 (heat source unit 13A, heat source pump 13A1, forward header 13B, air conditioner 13C, secondary side pump 13C1, return header 13D, and unused energy utilization system 13E) shown in Figures 1 to 3 do not exist.

[0047] In an example of the heat accommodation system 1 of the second embodiment, a building 11 is equipped with a heat source unit 11A having a heat source pump 11A1, a forward header 11B, an air conditioner 11C having a secondary pump 11C1, a return header 11D, and a solar heat utilization system 11E. In other examples, the solar thermal utilization system 11E may not be located in the building 11.

[0048] In an example of the heat accommodation system 1 of the second embodiment, a building 12 is equipped with a heat source unit 12A having a heat source pump 12A1, a forward header 12B, an air conditioner 12C having a secondary pump 12C1, a return header 12D, and a geothermal energy utilization system 12E. In other examples, the geothermal energy utilization system 12E may not be located in the building 12.

[0049] In one example of the heat accommodation system 1 of the second embodiment, a heat source unit 11A and an air conditioner 11C of a building 11 and a heat source unit 12A and an air conditioner 12C of a building 12 are connected via a heat accommodation pipe 17 for transporting a heat medium. In detail, the heat source unit 11A and the air conditioner 11C of the building 11 and the heat source unit 12A and the air conditioner 12C of the building 12 are connected via an outgoing header 11B of the building 11, a heat accommodation pipe 17A1, and an outgoing header 12B of the building 12, and are also connected via a return header 11D of the building 11, a heat accommodation pipe 17A2, and a return header 12D of the building 12.

[0050] In an example of the heat accommodation system 1 of the second embodiment, the heat demand prediction unit 1A predicts the heat demand of building 11 based on the operating history of the heat source unit 11A of building 11, external information of building 11, and internal information of building 11 including operating information of the air conditioner 11C of building 11. In addition, the heat demand prediction unit 1A predicts the heat demand of the building 12 based on the operating history of the heat source unit 12A of the building 12, external information of the building 12, and internal information of the building 12 including operating information of the air conditioner 12C of the building 12.

[0051] In an example of the heat accommodation system 1 of the second embodiment, the operation plan formulation unit 1B formulates an operation plan for the heat source unit 11A and heat source pump 11A1 of building 11 and an operation plan for the heat source unit 12A and heat source pump 12A1 of building 12 based on the heat demand of building 11 and the heat demand of building 12 predicted by the heat demand prediction unit 1A. In detail, the operation plan formulation unit 1B replaces the heat source pump 11A1 and the secondary side pump 11C1 of the building 11 with a first building heat source pump current source which is a current source equivalent to the heat source pump 11A1 of the building 11 connected in antiparallel and a first building secondary side pump current source which is a current source equivalent to the secondary side pump 11C1 of the building 11, and also corresponds the heat demand of the building 11 predicted by the heat demand prediction unit 1A to the current value Il1 of the first building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 11, the greater the current value Il1 of the first building secondary side pump current source), and formulates the operation plan of the heat source pump 11A1 of the building 11 formulated by the operation plan formulation unit 1B based on the current value Ig of the first building heat source pump current source. 1a(That is, the current value Ig of the first building heat source pump current source) 1a It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 11A1 of the building 11. Furthermore, the operation plan formulation unit 1B replaces the heat source pump 12A1 and the secondary side pump 12C1 of the building 12 with a second building heat source pump current source which is a current source equivalent to the heat source pump 12A1 of the building 12 connected in antiparallel, and a second building secondary side pump current source which is a current source equivalent to the secondary side pump 12C1 of the building 12, and also corresponds the heat demand of the building 12 predicted by the heat demand prediction unit 1A to the current value Il2 of the second building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 12, the greater the current value Il2 of the second building secondary side pump current source), and formulates the operation plan of the heat source pump 12A1 of the building 12 formulated by the operation plan formulation unit 1B based on the current value Ig of the second building heat source pump current source. 2b (i.e., the current value Ig of the second building heat source pump current source) 2b It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 12A1 of the building 12.

[0052] In an example of the heat accommodation system 1 of the second embodiment, the operation plan formulation unit 1B corresponds the piping resistance of the heat medium transported through the heat accommodation piping 17A1, 17A2 connecting the heat source unit 11A and the air conditioner 11C of the building 11 with the heat source unit 12A and the air conditioner 12C of the building 12 to the resistance value (shown by symbol R1 in Figure 2) of the wiring connecting the first building heat source pump current source and the first building secondary side pump current source connected in anti-parallel with the second building heat source pump current source and the second building secondary side pump current source connected in anti-parallel (in other words, it is considered that the greater the difficulty in the flow of the heat medium in the heat accommodation piping 17A1, 17A2, the greater the resistance value R1 of the wiring). The operation plan formulation unit 1B also calculates a current value Ig of the first building heat source pump current source in an electric circuit including the first building heat source pump current source and the first building secondary side pump current source connected in anti-parallel, the second building heat source pump current source and the second building secondary side pump current source connected in anti-parallel, and wiring. 1a and the current value Ig of the second building heat source pump current source2b Calculate.

[0053] In one example of the heat accommodation system 1 of the second embodiment, the operation plan formulation unit 1B determines the current value Ig of the first building heat source pump current source based on the above. 1a The operation plan of the heat source pump 11A1 of the building 11 corresponding to the current value Ig of the current source of the heat source pump of the second building 2b An operation plan for the heat source pump 12A1 of the building 12 corresponding to the above is formulated. In another example, the operation plan formulation unit 1B may calculate the current value Il1 of the first building secondary side pump current source and the current value Il2 of the second building secondary side pump current source in an electrical circuit including a first building heat source pump current source and a first building secondary side pump current source connected in anti-parallel, a second building heat source pump current source and a second building secondary side pump current source connected in anti-parallel, and wiring, and based on these, formulate an operation plan for the secondary side pump 11C1 of building 11 corresponding to the current value Il1 of the first building secondary side pump current source, and an operation plan for the secondary side pump 12C1 of building 12 corresponding to the current value Il2 of the second building secondary side pump current source.

[0054] In one example of the heat accommodation system 1 of the second embodiment, the monitoring unit 1C generates and outputs operation commands for the heat source unit 11A and the heat source pump 11A1 of the building 11 based on the operation plan for the heat source unit 11A and the heat source pump 11A1 of the building 11 formulated by the operation plan formulation unit 1B. The monitoring unit 1C also generates and outputs operation commands for the heat source unit 12A and the heat source pump 12A1 of the building 12 based on the operation plan for the heat source unit 12A and the heat source pump 12A1 of the building 12 formulated by the operation plan formulation unit 1B.

[0055] [Third embodiment] A third embodiment of the heat accommodation system, the heat accommodation method, the energy management system, and the program of the present invention will be described below. The heat accommodation system 1 of the third embodiment is configured similarly to the heat accommodation system 1 of the first embodiment described above, except for the points described below. Therefore, the heat accommodation system 1 of the third embodiment can achieve the same effects as the heat accommodation system 1 of the first embodiment described above, except for the points described below.

[0056] FIG. 5 is a diagram showing an example of expressing a part of the heat accommodation system 1 of the third embodiment using an electric circuit. 5, the heat accommodation system 1 performs heat accommodation between a building 11, a building 12, a building 13, and a building 14. The building 14 is provided with a heat source unit 14A having a heat source pump 14A1, a forward header 14B, an air conditioner 14C having a secondary pump 14C1, and a return header 14D.

[0057] 5, the heat source unit 11A and the air conditioner 11C of the building 11 and the heat source unit 12A and the air conditioner 12C of the building 12 are connected via the outgoing header 11B of the building 11, the heat accommodation piping 17A1, and the outgoing header 12B of the building 12, and are also connected via the return header 11D of the building 11, the heat accommodation piping 17A2, and the return header 12D of the building 12. In addition, the heat source unit 12A and the air conditioner 12C of the building 12 and the heat source unit 13A and the air conditioner 13C of the building 13 are connected via the outgoing header 12B of the building 12, the heat accommodation piping 17B1, and the outgoing header 13B of the building 13, and are also connected via the return header 12D of the building 12, the heat accommodation piping 17B2, and the return header 13D of the building 13. Furthermore, the heat source unit 13A and air conditioner 13C of building 13 are connected to the heat source unit 14A and air conditioner 14C of building 14 via the forward header 13B of building 13, the heat accommodation piping 17C1 and the forward header 14B of building 14, and are also connected via the return header 13D of building 13, the heat accommodation piping 17C2 and the return header 14D of building 14.

[0058] In the example shown in Figure 5, the heat demand prediction unit 1A of the energy management system 1-1 predicts the heat demand of buildings 11, 12, and 13, and also predicts the heat demand of building 14 based on the operating history of heat source unit 14A of building 14, external information of building 14, and internal information of building 14 including operating information of air conditioner 14C of building 14. The operation plan formulation unit 1B of the energy management system 1-1 formulates an operation plan for the heat source unit 11A and heat source pump 11A1 of building 11, an operation plan for the heat source unit 12A and heat source pump 12A1 of building 12, an operation plan for the heat source unit 13A and heat source pump 13A1 of building 13, and an operation plan for the heat source unit 14A and heat source pump 14A1 of building 14 based on the heat demand of buildings 11, 12, 13, and 14 predicted by the heat demand prediction unit 1A.

[0059] In detail, as shown in FIG. 5, the operation plan formulation unit 1B replaces the heat source pump 11A1 and the secondary side pump 11C1 of the building 11 with a first building heat source pump current source which is a current source corresponding to the heat source pump 11A1 of the building 11 connected in antiparallel and a first building secondary side pump current source which is a current source corresponding to the secondary side pump 11C1 of the building 11, and also corresponds the heat demand of the building 11 predicted by the heat demand prediction unit 1A to the current value Il1 of the first building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 11, the greater the current value Il1 of the first building secondary side pump current source), and formulates the operation plan of the heat source pump 11A1 of the building 11 formulated by the operation plan formulation unit 1B based on the current value Ig of the first building heat source pump current source. 1a (That is, the current value Ig of the first building heat source pump current source) 1a It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 11A1 of the building 11. Furthermore, the operation plan formulation unit 1B replaces the heat source pump 12A1 and the secondary side pump 12C1 of the building 12 with a second building heat source pump current source which is a current source equivalent to the heat source pump 12A1 of the building 12 connected in antiparallel, and a second building secondary side pump current source which is a current source equivalent to the secondary side pump 12C1 of the building 12, and also corresponds the heat demand of the building 12 predicted by the heat demand prediction unit 1A to the current value Il2 of the second building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 12, the greater the current value Il2 of the second building secondary side pump current source), and formulates the operation plan of the heat source pump 12A1 of the building 12 formulated by the operation plan formulation unit 1B based on the current value Ig of the second building heat source pump current source. 2b (i.e., the current value Ig of the second building heat source pump current source) 2b It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 12A1 of the building 12.

[0060] Furthermore, the operation plan formulation unit 1B replaces the heat source pump 13A1 and the secondary side pump 13C1 of the building 13 with a third building heat source pump current source which is a current source equivalent to the heat source pump 13A1 of the building 13 connected in antiparallel, and a third building secondary side pump current source which is a current source equivalent to the secondary side pump 13C1 of the building 13, and corresponds the heat demand of the building 13 predicted by the heat demand prediction unit 1A to the current value Il3 of the third building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 13, the greater the current value Il3 of the third building secondary side pump current source), and formulates the operation plan of the heat source pump 13A1 of the building 13 formulated by the operation plan formulation unit 1B in accordance with the current value Ig 3c (That is, the current value Ig of the heat pump current source of the third building 3c It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 13A1 of the building 13. Furthermore, the operation plan formulation unit 1B replaces the heat source pump 14A1 and the secondary side pump 14C1 of the building 14 with a fourth building heat source pump current source which is a current source equivalent to the heat source pump 14A1 of the building 14 connected in antiparallel, and a fourth building secondary side pump current source which is a current source equivalent to the secondary side pump 14C1 of the building 14, and also corresponds the heat demand of the building 14 predicted by the heat demand prediction unit 1A to the current value Il4 of the fourth building secondary side pump current source (that is, it is considered that the greater the heat demand of the building 14, the greater the current value Il4 of the fourth building secondary side pump current source), and formulates the operation plan of the heat source pump 14A1 of the building 14 formulated by the operation plan formulation unit 1B in accordance with the current value Ig 4d (That is, the current value Ig of the heat pump current source of the fourth building 4d It is considered that the larger the value, the larger the planned value of the operating capacity of the heat source pump 14A1 of the building 14.

[0061] Furthermore, the operation plan formulation unit 1B calculates the piping resistance of the heat medium transported through the heat accommodation piping 17A1, 17A2, 17B1, 17B2, 17C1, 17C2 connecting the heat source unit 11A and the air conditioner 11C of the building 11, the heat source unit 12A and the air conditioner 12C of the building 12, the heat source unit 13A and the air conditioner 13C of the building 13, and the heat source unit 14A and the air conditioner 14C of the building 14, by calculating the piping resistance of the heat medium transported through the heat accommodation piping 17A1, 17A2, 17B1, 17B2, 17C1, 17C2 connected in reverse parallel to the first building heat source pump current source and the first building secondary side pump current source connected in reverse parallel to the second building heat source pump current source and the second building secondary side pump current source connected in reverse parallel to the first building heat source pump current source and the second building heat source pump current source connected in reverse parallel to the second building heat source pump current source and ... The resistance values ​​(shown by symbols R1, R2, R3 in Figure 5) of the wiring connecting the first building heat source pump current source and the second building secondary side pump current source connected in anti-parallel to the third building heat source pump current source and the third building secondary side pump current source connected in anti-parallel to the fourth building heat source pump current source and the fourth building secondary side pump current source connected in anti-parallel (in other words, it is considered that the greater the difficulty in the flow of the heat medium in the heat accommodation piping 17A1, 17A2, 17B1, 17B2, 17C1, 17C2, the greater the resistance values ​​R1, R2, R3 of the wiring). Furthermore, the operation plan formulation unit 1B calculates a current value Ig of the first building heat source pump current source in an electric circuit including the first building heat source pump current source and the first building secondary side pump current source connected in anti-parallel, the second building heat source pump current source and the second building secondary side pump current source connected in anti-parallel, the third building heat source pump current source and the third building secondary side pump current source connected in anti-parallel, the fourth building heat source pump current source and the fourth building secondary side pump current source connected in anti-parallel, and wiring. 1a , the current value Ig of the second building heat source pump current source 2b , the current value Ig of the heat pump current source of the third building 3c and the current value Ig of the heat pump current source of the fourth building 4d Calculate.

[0062] Based on these, the operation plan formulation unit 1B determines the current value Ig of the first building heat source pump current source. 1a The operation plan of the heat source pump 11A1 of the building 11 corresponding to the current value Ig of the current source of the heat source pump of the second building 2b The operation plan of the heat source pump 12A1 of the building 12 corresponding to the current value Ig of the current source of the heat source pump of the third building 3c The operation plan of the heat source pump 13A1 of the building 13 corresponding to the current value Ig of the current source of the heat source pump of the fourth building 4d An operation plan for the heat source pump 14A1 of the building 14 corresponding to the above is formulated. The monitoring unit 1C of the energy management system 1-1 generates and outputs operation commands for the heat source unit 11A and the heat source pump 11A1 of building 11 based on the operation plan for the heat source unit 11A and the heat source pump 11A1 of building 11 formulated by the operation plan formulation unit 1B, generates and outputs operation commands for the heat source unit 12A and the heat source pump 12A1 of building 12 based on the operation plan for the heat source unit 12A and the heat source pump 12A1 of building 12 formulated by the operation plan formulation unit 1B, generates and outputs operation commands for the heat source unit 13A and the heat source pump 13A1 of building 13 based on the operation plan for the heat source unit 13A and the heat source pump 13A1 of building 13 based on the operation plan for the heat source unit 13A and the heat source pump 13A1 of building 13 formulated by the operation plan formulation unit 1B, and generates and outputs operation commands for the heat source unit 14A and the heat source pump 14A1 of building 14 based on the operation plan for the heat source unit 14A and the heat source pump 14A1 of building 14 formulated by the operation plan formulation unit 1B. As a result, in the example shown in Figure 5, by sharing heat between four buildings 11, 12, 13, and 14, the operating efficiency of heat source units 11A, 12A, 13A, and 14A and heat source pumps 11A1, 12A1, 13A1, and 14A1 in each of buildings 11, 12, 13, and 14 can be improved.

[0063] In other words, in the example shown in FIG. 5, the heat source pump 11A1 of the heat source unit 11A and the secondary pump 11C1 of the air conditioner 11C in the building 11 of the heat accommodation system 1 of the third embodiment, the heat source pump 12A1 of the heat source unit 12A and the secondary pump 12C1 of the air conditioner 12C in the building 12, the heat source pump 13A1 of the heat source unit 13A and the secondary pump 13C1 of the air conditioner 13C in the building 13, the heat source pump 14A1 of the heat source unit 14A and the secondary pump 14C1 of the air conditioner 14C in the building 14, and the heat accommodation piping 17A1, 17A2, 17B1 , 17B2, 17C1, 17C2 are replaced with the first building heat source pump current source and the first building secondary side pump current source, the second building heat source pump current source and the second building secondary side pump current source, the third building heat source pump current source and the third building secondary side pump current source, the fourth building heat source pump current source and the fourth building secondary side pump current source, wiring (17A1, 17A2) having a resistance value R1, wiring (17B1, 17B2) having a resistance value R2, and wiring (17C1, 17C2) having a resistance value R3 of the electrical circuit.

[0064] 5, the flow rate of the heat source pump 11A1 of the building 11 is calculated based on the current value Ig 1a and the flow rate of the secondary pump 11C1 of the building 11 is replaced by the current value Il1 of the first building secondary pump current source corresponding to the secondary pump 11C1 of the building 11. The flow rate of the heat source pump 12A1 of the building 12 is replaced by the current value Ig 2b and the flow rate of the secondary pump 12C1 of the building 12 is replaced by the current value Il2 of the second building secondary pump current source corresponding to the secondary pump 12C1 of the building 12. The flow rate of the heat source pump 13A1 of the building 13 is replaced by the current value Ig 3c and the flow rate of the secondary pump 13C1 of the building 13 is replaced by the current value Il3 of the third building secondary pump current source corresponding to the secondary pump 13C1 of the building 13. The flow rate of the heat source pump 14A1 of the building 14 is replaced by the current value Ig 4dand the flow rate of the secondary pump 14C1 of the building 14 is replaced by the current value Il4 of the fourth building secondary pump current source corresponding to the secondary pump 14C1 of the building 14. The head of the supply header 11B of building 11 is represented by V1, the head of the supply header 12B of building 12 is represented by V2, the head of the supply header 13B of building 13 is represented by V3, the head of the supply header 14B of building 14 is represented by V4, the head of the return header 12D of building 12 is represented by V5, the head of the return header 13D of building 13 is represented by V6, and the head of the return header 14D of building 14 is represented by V7. Furthermore, the piping resistance per unit flow rate of the heat accommodation pipes 17A1 and 17A2 having a resistance value R1 is represented by y1, the piping resistance per unit flow rate of the heat accommodation pipes 17B1 and 17B2 having a resistance value R2 is represented by y2, and the piping resistance per unit flow rate of the heat accommodation pipes 17C1 and 17C2 having a resistance value R3 is represented by y3. In the example shown in FIG. 5, the operation plan formulation unit 1B solves the following simultaneous equations (6) to formulate an optimal operation plan for the heat source units 11A, 12A, 13A, and 14A of the buildings 11, 12, 13, and 14.

[0065]

number

[0066] The shaft power can be expressed as in the following equation (7): In equation (7), α is the pump efficiency, Q is the flow rate, and H is the head. Shaft power=αQH (7)

[0067] The operation plan formulation unit 1B calculates the power P of the heat source pump 11A1 of the heat source machine 11A of the building 11 by using the following formula (8): 1a and the power P of the heat source pump 12A1 of the heat source machine 12A of the building 12. 2b and the power P of the heat source pump 13A1 of the heat source machine 13A of the building 13. 3c and the power P of the heat source pump 14A1 of the heat source machine 14A of the building 14. 4d In equation (8), V1, V2, V3, V4, V5, V6, and V7 are heads corresponding to H in equation (7), and Ig 1a , Ig2b , Ig 3c , Ig 4d is the flow rate corresponding to Q in equation (7), and k a , k b , k c , k d is the pump efficiency corresponding to α in equation (7).

[0068]

number

[0069] The operation plan formulation unit 1B formulates equations (6) and (8) using linear programming and optimizes them in conjunction with the power of the heat source units 11A, 12A, 13A, and 14A of the buildings 11, 12, 13, and 14, thereby formulating an optimal operation plan for the heat source units 11A, 12A, 13A, and 14A of the buildings 11, 12, 13, and 14, taking into account the power required for heat accommodation.

[0070] [Fourth embodiment] A fourth embodiment of the heat accommodation system, the heat accommodation method, the energy management system, and the program of the present invention will be described below. The heat accommodation system 1 of the fourth embodiment is configured similarly to the heat accommodation system 1 of the third embodiment described above, except for the points described below. Therefore, the heat accommodation system 1 of the fourth embodiment can achieve the same effects as the heat accommodation system 1 of the third embodiment described above, except for the points described below.

[0071] FIG. 6 is a diagram showing an example of a heat accommodation system 1 according to the fourth embodiment. In the example shown in Fig. 6, the heat accommodation system 1 performs heat accommodation between buildings 11, 12, 13, 14, 15, and 16. In building 15, a heat source unit 15A having a heat source pump (not shown), a feed header (not shown), an air conditioner (not shown) having a secondary pump (not shown), and a return header (not shown) are arranged. In building 16, a heat source unit 16A having a heat source pump (not shown), a feed header (not shown), an air conditioner (not shown) having a secondary pump (not shown), and a return header (not shown) are arranged. Heat source unit 11A and air conditioner 11C of building 11, heat source unit 12A and air conditioner 12C of building 12, heat source unit 13A and air conditioner 13C of building 13, heat source unit 14A and air conditioner 14C of building 14, heat source unit 15A and air conditioner of building 15, and heat source unit 16A and air conditioner of building 16 are connected via heat accommodation piping 17 for transporting heat medium.

[0072] In the example shown in Figure 6, the heat demand prediction unit 1A of the energy management system 1-1 predicts the heat demand of buildings 11, 12, 13, and 14, and predicts the heat demand of building 15 based on the operating history of heat source unit 15A of building 15, external information about building 15, and internal information about building 15 including operating information of air conditioners in building 15, and predicts the heat demand of building 16 based on the operating history of heat source unit 16A of building 16, external information about building 16, and internal information about building 16 including operating information of air conditioners in building 16. The operation plan formulation unit 1B of the energy management system 1-1 formulates an operation plan for the heat source unit 11A and heat source pump 11A1 of building 11, an operation plan for the heat source unit 12A and heat source pump 12A1 of building 12, an operation plan for the heat source unit 13A and heat source pump 13A1 of building 13, an operation plan for the heat source unit 14A and heat source pump 14A1 of building 14, an operation plan for the heat source unit 15A and heat source pump of building 15, and an operation plan for the heat source unit 16A and heat source pump of building 16 based on the heat demand of buildings 11 to 16 predicted by the heat demand prediction unit 1A. The monitoring unit 1C of the energy management system 1-1 generates and outputs operation commands for the heat source machine 11A and the heat source pump 11A1 of the building 11 based on the operation plan for the heat source machine 11A and the heat source pump 11A1 of the building 11 formulated by the operation plan formulation unit 1B, generates and outputs operation commands for the heat source machine 12A and the heat source pump 12A1 of the building 12 based on the operation plan for the heat source machine 12A and the heat source pump 12A1 of the building 12 formulated by the operation plan formulation unit 1B, and generates and outputs operation commands for the heat source machine 13A and the heat source pump 13A1 of the building 13 based on the operation plan for the heat source machine 13A and the heat source pump 13A1 of the building 13 formulated by the operation plan formulation unit 1B. The operation plan formulation unit 1B formulates and outputs operation commands for the heat source machine 14A and the heat source pump 14A1 of building 14 based on the operation plan for the heat source machine 14A and the heat source pump 14A1 of building 14, the operation plan formulation unit 1B formulates and outputs operation commands for the heat source machine 15A and the heat source pump of building 15 based on the operation plan for the heat source machine 15A and the heat source pump of building 15, and the operation plan formulation unit 1B formulates and outputs operation commands for the heat source machine 16A and the heat source pump of building 16 based on the operation plan for the heat source machine 16A and the heat source pump of building 16. As a result, in the example shown in FIG. 6, heat accommodation is performed among the six buildings 11 to 16, thereby improving the operating efficiency of the heat source machines and heat source pumps in each of the buildings 11 to 16.

[0073] [Fifth embodiment] Hereinafter, a fifth embodiment of the heat accommodation system, the heat accommodation method, the energy management system, and the program of the present invention will be described. The heat accommodation system 1 of the fifth embodiment is configured similarly to the heat accommodation system 1 of the first embodiment described above, except for the points described below. Therefore, the heat accommodation system 1 of the fifth embodiment can achieve the same effects as the heat accommodation system 1 of the first embodiment described above, except for the points described below.

[0074] In the heat accommodation system 1 of the fifth embodiment, heat accommodation is performed among five buildings, or among seven or more buildings.

[0075] [Sixth embodiment] A sixth embodiment of the heat accommodation system, the heat accommodation method, the energy management system, and the program of the present invention will be described below. The heat accommodation system 1 of the sixth embodiment is configured similarly to the heat accommodation system 1 of the first embodiment described above, except for the points described below. Therefore, the heat accommodation system 1 of the sixth embodiment can achieve the same effects as the heat accommodation system 1 of the first embodiment described above, except for the points described below.

[0076] As described above, in the first embodiment of the heat accommodation system 1 (the example shown in Figure 2), no booster pumps are arranged on the heat accommodation piping 17A1, 17A2, 17B1, and 17B2, but in the sixth embodiment of the heat accommodation system 1, a booster pump is arranged on the heat accommodation piping.

[0077] Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configurations are not limited to these embodiments and examples, and appropriate modifications can be made without departing from the spirit of the present invention. The configurations described in the above-described embodiments and examples may be combined.

[0078] In addition, all or part of the functions of each unit (e.g., energy management system 1-1, etc.) included in the heat accommodation system 1 in the above-described embodiment may be realized by recording a program for realizing these functions on a computer-readable recording medium, and reading and executing the program recorded on this recording medium into a computer system. Note that the term "computer system" here includes hardware such as an OS and peripheral devices. Furthermore, "computer-readable recording media" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage units such as hard disks built into computer systems. Furthermore, "computer-readable recording media" may also include devices that dynamically store programs for a short period of time, such as communication lines when transmitting programs over networks like the Internet or communication lines like telephone lines, or devices that store programs for a fixed period of time, such as volatile memory within computer systems that serve as servers or clients in such cases. Furthermore, the above-mentioned programs may be programs that realize some of the aforementioned functions, or may be programs that can realize the aforementioned functions in combination with programs already stored in the computer system. [Explanation of symbols]

[0079] 1...heat accommodation system, 1-1...energy management system, 1A...heat demand forecasting section, 1B...operation planning section, 1C...monitoring section, 11...building, 11A...heat source machine, 11A1...heat source pump, 11B...supply header, 11C...air conditioner, 11C1...secondary pump, 11D...return header, 11E...solar thermal utilization system, 12...building, 12A...heat source machine, 12A1...heat source pump, 12B...supply header, 12C...air conditioner, 12C1...secondary pump, 12D...return header, 12E...geothermal utilization system, 13...building, 13A...heat source machine, 13A1... Heat source pump, 13B... forward header, 13C... air conditioner, 13C1... secondary pump, 13D... return header, 13E... unused energy utilization system, 14... building, 14A... heat source machine, 14A1... heat source pump, 14B... forward header, 14C... air conditioner, 14C1... secondary pump, 14D... return header, 15... building, 15A... heat source machine, 16... building, 16A... heat source machine, 17... heat accommodation piping, 17A1... heat accommodation piping, 17A2... heat accommodation piping, 17B1... heat accommodation piping, 17B2... heat accommodation piping, 17C1... heat accommodation piping, 17C2... heat accommodation piping

Claims

1. A heat accommodation system that performs heat accommodation between a plurality of buildings including at least a first building and a second building, The first building is provided with at least a heat source machine having a heat source pump and an air conditioner having a secondary pump, The second building is provided with at least a heat source machine having a heat source pump and an air conditioner having a secondary pump, The heat source unit and the air conditioner of the first building are connected to the heat source unit and the air conditioner of the second building via a heat accommodation pipe for transporting a heat medium, a heat demand prediction unit that predicts the heat demand of the first building based on at least one of the operation history of a heat source machine of the first building, external information of the first building, and internal information of the first building including operation information of an air conditioner of the first building, and that predicts the heat demand of the second building based on at least one of the operation history of a heat source machine of the second building, external information of the second building, and internal information of the second building including operation information of an air conditioner of the second building; an operation plan formulation unit that formulates an operation plan for at least the heat source machine and the heat source pump of the first building and an operation plan for at least the heat source machine and the heat source pump of the second building based on the heat demand of the first building and the heat demand of the second building predicted by the heat demand prediction unit; A heat sharing system comprising: a monitoring unit that generates and outputs operation commands for at least the heat source machine and heat source pump of the first building based on an operation plan for at least the heat source machine and heat source pump of the first building formulated by the operation plan formulation unit, and that generates and outputs operation commands for at least the heat source machine and heat source pump of the second building based on an operation plan for at least the heat source machine and heat source pump of the second building formulated by the operation plan formulation unit.

2. The operation plan formulation unit the heat source pump and secondary side pump of the first building are replaced with a first building heat source pump current source which is a current source corresponding to the heat source pump of the first building connected in antiparallel, and a first building secondary side pump current source which is a current source corresponding to the secondary side pump of the first building, and the heat demand of the first building predicted by the heat demand prediction unit is made to correspond to the current value of the first building secondary side pump current source, and the operation plan of the heat source pump of the first building formulated by the operation plan formulation unit is made to correspond to the current value of the first building heat source pump current source; the heat source pump and secondary side pump of the second building are replaced with a second building heat source pump current source which is a current source corresponding to the heat source pump of the second building connected in antiparallel, and a second building secondary side pump current source which is a current source corresponding to the secondary side pump of the second building, and the heat demand of the second building predicted by the heat demand prediction unit is made to correspond to the current value of the second building secondary side pump current source, and the operation plan of the heat source pump of the second building formulated by the operation plan formulation unit is made to correspond to the current value of the second building heat source pump current source; the piping resistance of the heat medium transported through the heat accommodation piping connecting the heat source unit and air conditioner of the first building with the heat source unit and air conditioner of the second building is made to correspond to the resistance value of wiring connecting the first building heat source pump current source and the first building secondary side pump current source connected in anti-parallel with the second building heat source pump current source and the second building secondary side pump current source connected in anti-parallel; By calculating the current value of the first building heat source pump current source and the current value of the second building heat source pump current source in an electric circuit including the first building heat source pump current source and the first building secondary side pump current source connected in anti-parallel, the second building heat source pump current source and the second building secondary side pump current source connected in anti-parallel, and the wiring, Formulating an operation plan for a heat source pump of the first building and an operation plan for a heat source pump of the second building; The heat exchange system according to claim 1 .

3. A heat accommodation method for performing heat accommodation between a plurality of buildings including at least a first building and a second building, The first building is provided with at least a heat source machine having a heat source pump and an air conditioner having a secondary pump, The second building is provided with at least a heat source machine having a heat source pump and an air conditioner having a secondary pump, The heat source unit and the air conditioner of the first building are connected to the heat source unit and the air conditioner of the second building via a heat accommodation pipe for transporting a heat medium, a heat demand prediction step of predicting the heat demand of the first building based on at least one of the operation history of a heat source machine of the first building, external information of the first building, and internal information of the first building including operation information of an air conditioner of the first building, and predicting the heat demand of the second building based on at least one of the operation history of a heat source machine of the second building, external information of the second building, and internal information of the second building including operation information of an air conditioner of the second building; an operation plan formulation step of formulating an operation plan for at least the heat source machine and the heat source pump of the first building and an operation plan for at least the heat source machine and the heat source pump of the second building based on the heat demand of the first building and the heat demand of the second building predicted in the heat demand prediction step; A heat accommodation method comprising: a monitoring step of generating and outputting operation commands for at least the heat source machine and heat source pump of the first building based on the operation plan for at least the heat source machine and heat source pump of the first building formulated in the operation plan formulation step; and generating and outputting operation commands for at least the heat source machine and heat source pump of the second building based on the operation plan for at least the heat source machine and heat source pump of the second building formulated in the operation plan formulation step.

4. An energy management system that manages heat accommodation performed between a plurality of buildings including at least a first building and a second building, The first building is provided with at least a heat source machine having a heat source pump and an air conditioner having a secondary pump, The second building is provided with at least a heat source machine having a heat source pump and an air conditioner having a secondary pump, The heat source unit and the air conditioner of the first building are connected to the heat source unit and the air conditioner of the second building via a heat accommodation pipe for transporting a heat medium, The energy management system includes: a heat demand prediction unit that predicts the heat demand of the first building based on at least one of the operation history of a heat source machine of the first building, external information of the first building, and internal information of the first building including operation information of an air conditioner of the first building, and that predicts the heat demand of the second building based on at least one of the operation history of a heat source machine of the second building, external information of the second building, and internal information of the second building including operation information of an air conditioner of the second building; an operation plan formulation unit that formulates an operation plan for at least the heat source machine and the heat source pump of the first building and an operation plan for at least the heat source machine and the heat source pump of the second building based on the heat demand of the first building and the heat demand of the second building predicted by the heat demand prediction unit, an operation command for at least the heat source machine and the heat source pump of the first building is created by a monitoring unit based on an operation plan for at least the heat source machine and the heat source pump of the first building formulated by the operation plan formulation unit, and is output by the monitoring unit; an operation command for at least the heat source machine and the heat source pump of the second building is created by the monitoring unit based on an operation plan for at least the heat source machine and the heat source pump of the second building formulated by the operation plan formulation unit, and is output by the monitoring unit; Energy management system.

5. A computer constituting an energy management system that manages heat exchange between a plurality of buildings including at least a first building having a heat source machine with at least a heat source pump and an air conditioner having a secondary pump, and a second building having at least a heat source machine with a heat source pump and an air conditioner having a secondary pump, a heat demand prediction step of predicting the heat demand of the first building based on at least one of the operation history of a heat source machine of the first building, external information of the first building, and internal information of the first building including operation information of an air conditioner of the first building, and predicting the heat demand of the second building based on at least one of the operation history of a heat source machine of the second building, external information of the second building, and internal information of the second building including operation information of an air conditioner of the second building; a program for executing an operation plan formulation step of formulating an operation plan for at least a heat source machine and a heat source pump of the first building and an operation plan for at least a heat source machine and a heat source pump of the second building based on the heat demand of the first building and the heat demand of the second building predicted in the heat demand prediction step, The heat source unit and the air conditioner of the first building are connected to the heat source unit and the air conditioner of the second building via a heat accommodation pipe for transporting a heat medium, an operation command for at least the heat source machine and the heat source pump of the first building is created by a monitoring unit based on the operation plan for at least the heat source machine and the heat source pump of the first building formulated in the operation plan formulation step, and is output by the monitoring unit; an operation command for at least the heat source machine and the heat source pump of the second building is created by the monitoring unit based on the operation plan for at least the heat source machine and the heat source pump of the second building formulated in the operation plan formulation step, and is output by the monitoring unit; program.

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