Control device, control method, and program

Abstract

To provide a control device or the like of a heating medium system capable of easily reducing energy consumption cost.SOLUTION: A table creation unit that creates first and second tables in which respective energy consumption change amounts of the heat source machine and the heat transfer facility in a case where a set temperature of the heat source machine is increased / decreased by a predetermined value by changing the set temperature of the heat source machine by the predetermined value are recorded in association with each operating state; A heat source unit controller that controls the setting temperature of the heat source unit so as to reduce the energy cost of the heat medium system based on a first / second energy cost change amount of the heat medium system when the setting temperature of the heat source unit is increased / decreased by a predetermined value.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a control device, a control method, and a program.

Background Art

[0002] In buildings such as office buildings, air conditioning such as heating or cooling is performed in target spaces such as rooms. For example, Patent Document 1 discloses that by driving heat transfer equipment such as a pump , a heat medium supplied from a heat source apparatus for applying heat to the heat medium through a heat medium circulation circuit discloses a heat medium system in which a load-side apparatus heats or cools a target space.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] In many heat medium systems, due to PID control or the like of the constituent elements such as the heat source apparatus, heat transfer equipment, and load-side apparatus , for example, an increase or decrease in the set temperature of the heat source apparatus and an increase or decrease in the flow rate of the heat medium by the heat transfer equipment can have an inverse relationship. That is, in the heat medium system, when the set temperature of the heat source apparatus increases, the flow rate of the heat medium by the heat transfer equipment decreases, and conversely, there are cases where control is performed such that when the set temperature of the heat source apparatus decreases, the flow rate of the heat medium by the heat transfer equipment increases. In such a heat medium system, in order to reduce the energy consumption cost of the entire heat medium system while maintaining the function of the load-side apparatus, the output balance between the heat source apparatus and the heat transfer equipment It is necessary to make the system as optimal as possible. However, the energy of the heat source and heat transfer equipment The behavior of consumption varies greatly depending on the system configuration, installation environment, operating conditions, etc. It is difficult to control the energy consumption cost of the entire heat transfer system in a way that reduces it. .

[0005] Therefore, the present invention provides a heat transfer system that can easily reduce energy consumption costs. The objective is to provide control devices and the like for the system. [Means for solving the problem]

[0006] A control device according to one aspect of the present invention includes a heat source for supplying heat to a heat transfer medium, and a heat transfer medium and a A heat transfer medium is circulated between the heat consuming equipment that exchanges heat with the load and the heat source and the heat consuming equipment. A control device for controlling a heat transfer system, including heat transfer equipment that transports a heat transfer medium. By changing the set temperature of the heat source by a predetermined value, the first table and the second table are generated. A table creation unit that creates a table, the first table is defined as the set temperature of the heat source unit increases by a predetermined value. The change in the energy consumption of the first heat source unit when added is the energy consumption of the first heat source unit. Change in energy consumption of the heat source when the set temperature of the heat source decreases by a predetermined value. The change in energy consumption of the second heat source unit, which is a change in quantity, is associated with each operating state of the heat source unit. The first table records data, and the second table shows when the set temperature of the heat source unit has increased by a predetermined value. The first heat conveying equipment energy consumption is the change in the energy consumption of the heat conveying equipment in the given case. Change in energy consumption and the energy of the heat transfer equipment when the set temperature of the heat source decreases by a predetermined value. - The change in energy consumption of the second heat transfer equipment, which is the change in consumption, is related to the operation of each heat transfer equipment. A table creation unit, which records data associated with the state, and in the first table Changes in energy consumption of the first heat source and the second heat source, corresponding to the current operating status of the heat source. The change in machine energy consumption corresponds to the current operating status of the heat transfer equipment in the second table. The change in energy consumption of the first heat transfer equipment and the change in energy consumption of the second heat transfer equipment An energy consumption change acquisition unit acquires the acquired energy consumption change of the first heat source unit. Based on the quantity and the change in energy consumption of the first heat transfer equipment, the set temperature of the heat source unit is set to a predetermined value. The first energy is the change in the energy cost of the heat transfer system when it increases. The cost change amount was calculated, and the acquired energy consumption change amount of the second heat source unit and the second heat transfer unit were determined. Based on the change in energy consumption, when the set temperature of the heat source decreases by a predetermined value: The second energy cost change, which is the change in the energy cost of the heat transfer system, is calculated. The unit calculates the change in energy cost, and the first energy cost change and the second energy Based on the cost change, the energy cost of the heat transfer system is reduced, It includes a heat source control unit that controls the set temperature.

[0007] According to this embodiment, a heat source for supplying heat to a heat transfer medium and heat exchange between the heat transfer medium and the load The heat transfer medium is transported so that it circulates between the heat-consuming equipment and the heat source and the heat-consuming equipment. In a heat transfer system including a heat transfer device, the set temperature of the heat source is changed by a predetermined value. By doing so, when the set temperature of the heat source increases / decreases by a predetermined value, the energy of the heat source unit The first table records the change in energy consumption in correspondence with the operating status of the heat source unit, and the heat source unit When the set temperature increases / decreases by a predetermined value, the amount of change in energy consumption of the heat transfer equipment is heat a second table recorded in association with the operating state of the transfer equipment is created. Then, for each energy from the amount of change in energy consumption, when the set temperature of the heat source device increases / decreases by a predetermined value in the current operating state the first energy, which is the amount of change in the energy cost of the heat medium system when the temperature decreases cost change amount / second energy cost change amount is calculated, and these energy cost change amounts based on which, the set temperature of the heat source device is adjusted so as to reduce the energy cost of the heat medium system controlled. Therefore, it is possible to easily reduce the energy consumption cost of the heat medium system this becomes possible.

Effects of the Invention

[0008] According to the present invention, a heat medium system that can easily reduce energy consumption cost a control device for a system and the like can be provided.

Brief Description of Drawings

[0009] [Figure 1] It is a diagram showing the configuration of a chilled / hot water system 1 according to an embodiment. [Figure 2] It is a schematic diagram showing an example of the functional configuration of a control device 100 according to an embodiment. [Figure 3] It is a schematic diagram showing an example of the data structure of a heat source device operating state table 111. [Figure 4] It is a schematic diagram showing an example of the data structure of a pump operating state table 112. [Figure 5] It is a schematic diagram showing an example of the data structure of a heat source device energy consumption change amount table 113. [Figure 6] It is a schematic diagram showing an example of the data structure of a pump energy consumption change amount table 114. [Figure 7]This is an operation flow diagram showing an example of the operation processing related to the creation of various tables by the table creation unit 130 of the control device 100 according to the embodiment. [Figure 8] This is an operation flow diagram showing an example of the operation process related to operation balance control by the operation balance control unit 140 of the control device 100 according to the embodiment. [Modes for carrying out the invention]

[0010] A preferred embodiment of the present invention will be described with reference to the attached drawings. (Note that each figure is (Thus, those with the same symbol have the same or similar configuration.)

[0011] Figure 1 is a diagram showing the configuration of the chilled / hot water system 1 according to an embodiment. Based on Figure 1, This section will explain the configuration of the hot water system 1.

[0012] The chilled / hot water system 1 uses a heat transfer medium cooled or heated in the heat source unit to target This is a system that supplies heat to a heat load. The heat transfer medium is, for example, brine (antifreeze), water, etc. Examples include a mixture of line and water, and a mixture of a highly corrosion-preventive additive and water. As an example, let's assume that water (hot or cold water) is used as the heat transfer medium.

[0013] The chilled / hot water system 1 includes, for example, a heat source unit 10, an energy consumption sensor 11, and chilled / hot water. Outlet temperature sensor 12, chilled / hot water inlet temperature sensor 13, supply temperature sensor 14, pump 20 And the bypass valve 23, the supply primary header 24a, the supply secondary header 24b, and the return header 25 , bypass pipe 26, bypass valve 27, air conditioner 30, flow control valve 31, control unit It includes a 100.

[0014] These components of the chilled / hot water system 1 enable chilled / hot water circulation as an example of a heat transfer medium circulation circuit. A circular circuit is formed. The chilled / hot water is supplied as chilled / hot water and circulates through the chilled / hot water circulation circuit from the heat source unit 10. The water flows from there to the air conditioner 30, and as return chilled / hot water, it circulates through the chilled / hot water circulation circuit to the air conditioner 30. The water then flows to the heat source unit 10. In addition, the chilled and hot water circulation circuit depends on the installation location of the air conditioner 30, etc. Due to various circumstances such as differing required chilled and hot water transport capacities, multiple chilled and hot water transport systems are available depending on the installation location. It may include a water circulation system.

[0015] The chilled / hot water system 1 may, for example, include one or more heat source units 10. For example, under control by a control device for a heat source (not shown), fuel (such as gas) or electricity It consumes to generate heat or acquires heat from the outside air by an auxiliary heat source (not shown), generating or acquiring heat. By applying heat to the cold or hot water, the cold or hot water is cooled or heated. The heat obtained is cold heat acquired from the outside air by utilizing the properties of heat due to the change of state of matter. Alternatively, it can be generated by converting chemical energy into thermal energy through the combustion of fuel. It may also be heat. The heat source unit 10, for example, constitutes a refrigerant circuit that circulates a refrigerant (not shown). Even if the refrigeration cycle device is used to cool or heat water, good.

[0016] The heat source unit 10 has, for example, a set temperature S for chilled or hot water. The set temperature is the chilled water temperature. The set value SPC [°C] and the hot water temperature set value SPH [°C] may also be included. The heat source unit 10 is The set temperature S may be stored in a predetermined memory unit, or it may be displayed externally in a visible manner. Heat source For example, the device 10 sets the set temperature S within a predetermined range from a predetermined minimum value to a predetermined maximum value. It is configured to allow for adjustment in increments. In this embodiment, the chilled / hot water system 1 is equipped All at least one heat source unit 10 are controlled by a single common set temperature. This will be explained. However, at least one heat source unit 10 provided in the chilled / hot water system 1 is The temperature may be controlled by a different set temperature than that of the other heat source units 10.

[0017] Each heat source unit 10 is equipped with, for example, an energy consumption sensor 11 for the heat source unit 10. The energy consumption sensor 11, for example, measures the energy consumption of the heat source unit 10. Measure. Here, energy consumption is the energy required to generate the heat to be added to the chilled or heated water. - May be defined as the amount consumed per unit time of the source. Energy consumption is, for example, For example, if the heat source unit 10 is of the fuel combustion type, the amount of fuel (gas) burned per unit time is It may also be specified as volume (unit: [m^3 / s], etc.), or the heat source 10 may be electric. In some cases, it may be specified as power (unit: [kW], etc.).

[0018] Downstream of each heat source unit 10, individual pipes extend from each heat source unit 10 to the primary header 24a. The supply chilled and hot water flowing through each pipe merges at the supply primary header 24a. The port temperature sensor 12 is installed, for example, on the downstream side of each heat source unit 10 in the individual piping, and is cold Measure the hot water outlet temperature TO. The cold water outlet temperature TO is, for example, the cold water outlet temperature. Including the water outlet temperature TOC [°C] and the hot water outlet temperature TOH [°C], which is the temperature of the hot water outlet. That's good too.

[0019] Upstream of each heat source unit 10, individual pipes extend from each heat source unit 10 to the return header 25. The return chilled and hot water flowing from the return header 25 through each pipe flows to each heat source unit 10. The temperature sensor 13 is installed, for example, on the upstream side of each heat source unit 10 in the individual piping, and the chilled and hot water The inlet temperature TI is measured. The chilled / hot water inlet temperature TI is, for example, the chilled water inlet temperature. This may include the inlet temperature TIC [°C] and the hot water inlet temperature TIH [°C]. stomach.

[0020] The supply temperature sensor 14 is provided, for example, in the supply primary header 24a and measures the supply temperature TS of the chilled / hot water. Measure. The supply temperature of the chilled and hot water TS is, for example, the supply temperature of the chilled water, TCS [°C], and It may also include the supply temperature of the hot water, THS [°C].

[0021] Pump 20 is an example of heat transfer equipment, which generates power by consuming electricity, etc. Power is used to circulate chilled and hot water within the chilled and hot water circulation circuit between the heat source unit 10 and the air conditioner 30. It has a circulation function. Pump 20 is controlled, for example, by a pump control device (not shown). Below, the chilled and hot water in the chilled and hot water circulation circuit is drawn in, pressurized, and sent out to circulate the chilled and hot water. It circulates within the path. Pump 20 includes, for example, a primary pump 21 and a secondary pump 22. But that's fine.

[0022] The chilled / hot water system 1 includes, for example, one or more primary ports located upstream of the heat source unit 10. A pump 21 may be provided. Furthermore, the primary pump 21 may be provided downstream of the heat source unit 10. Good. The heat source unit 10 has a specified value for the flow rate of chilled and hot water (rated flow rate) and a maintenance allowance. A minimum possible value is defined. The primary pump 21 controls the flow rate of chilled and hot water in the heat source unit 10. This is a pump used to adjust the flow rate to a range where, for example, the minimum value is the lower limit and the rated flow rate is the upper limit. The next pump 21 controls the temperature of the hot and cold water outlet so as not to interfere with the operation of the air conditioner 30, for example. It is controlled based on the TO and the chilled / hot water inlet temperature TI, etc.

[0023] The control method for the primary pump 21 is, for example, variable control (motor rotation speed by inverter). It may also be a frequency control of a certain degree. Specifically, the primary pump 21 is for the maintenance of the heat source unit 10. The lower limit is the minimum acceptable value, and the upper limit is the rated flow rate of the heat source unit 10, and direct and indirect measurements are taken. The control instruction value is calculated from the flow rate of chilled / hot water on the load side, determined by the calculation, and the inverter frequency This method involves adjusting the flow rate of chilled or hot water on the heat source side (primary pump flow rate) by changing the set value of the number. You may perform the operation. In addition, if variable control is not possible for the primary pump 21, This applies only when the flow rate of chilled or hot water during the rated operation of the primary pump 21 exceeds the rated flow rate of the heat source unit. The opening degree of a valve (not shown) on the discharge side of the primary pump 21a is changed in advance, and the heat source side is physically changed Adjustments may be made to restrict the flow rate of chilled and hot water. In this case, adjustments may be made to match the fluctuations in the flow rate of chilled and hot water on the load side. No adjustment operation is required. The primary pump 21 has multiple hot and cold water circulation circuits. When configured to include a chilled / hot water circulation system, each chilled / hot water circulation system is controlled at the same frequency. This may be done. However, if primary pumps 21 with different capacities are mixed in the system, The frequency of the primary pump 21 may be different.

[0024] The chilled / hot water system 1 may include, for example, one or more secondary pumps 22. Pump 22 is, for example, a pump provided via individual piping on the downstream side of the supply primary header 24a. Therefore, in order to avoid interfering with the operation of the air conditioner 30, the chilled and hot water of the heat exchanger of the air conditioner 30 Adjust the flow rate to exceed the total flow rate of all secondary pumps 22. The quantity is equal to the total flow rate of chilled and hot water through the heat exchangers of all 30 air conditioners.

[0025] The secondary pump 22 controls the heat transfer fluid of the heat exchanger, which is determined, for example, by calculations using direct or indirect measurements. The control instruction value is calculated from the flow rate of the body, and the inverter frequency setting value is changed to control the heat transfer fluid on the load side. Control may be performed by adjusting the flow rate of the body (secondary pump flow rate). Also, for example Then, the flow rate of the heat transfer medium in the heat exchanger, determined by direct or indirect measurement calculations, is set in advance. By selecting a combination of the number of pumps to operate and instructing each pump to start or stop, the pumps will operate. By increasing the number of secondary pumps 22, the flow rate of the heat transfer medium on the load side (secondary pumps) can be increased. The flow rate of pump 22 may be adjusted. Note that the secondary pump 22 is used in the hot and cold water circulation circuit, which has multiple hot and cold water circulation circuits. When configured to include a water circulation system, each chilled / hot water circulation system is controlled by the same frequency. This is also acceptable. However, if there are secondary pumps 22 with different capacities mixed in the system, the secondary The frequencies of pump 22 may be different.

[0026] The bypass valve 23 is connected in parallel to each secondary pump 22, for example. When the flow rate of chilled / hot water exceeds the flow rate of the heat exchanger of the Waki ​​30, chilled / hot water is released from the outlet side of the secondary pump 22. The fluid passes through the bypass valve 23 and returns to the inlet side of the secondary pump 22.

[0027] Bypass pipe 26 is a pipe that connects the supply primary header 24a and the return header 25. The bypass pipe 26 bypasses the chilled and hot water that is not sent to the air conditioner 30 from the supply header 24. The system is configured to send the contents to the return header 25. The bypass valve 27 is located in the bypass pipe 26. It is located inside and adjusts the flow rate of hot and cold water passing through the bypass pipe 26.

[0028] The air conditioner 30 is an example of a heat consumption device, and operates between air (an example of a load) and chilled / hot water. A heat exchanger (not shown) for heat exchange, and a fan (not shown) for supplying air to the heat exchanger. It is a device that heats or cools air. The chilled / hot water system 1 is, for example, an air conditioner. The air conditioner 30 may have one or more units 30. For example, the air conditioner 30 may be a fan coil unit , and may be air handling units, etc.

[0029] A corresponding flow control valve 31 is provided downstream of each air conditioner 30. 1 may be configured as, for example, a two-way valve or a three-way valve. Note that the flow control valve 31 is configured as each air It may be installed upstream of the air conditioner 30. The flow control valve 31 is connected to the heat exchanger via piping. The flow rate of the chilled and hot water in the heat exchanger can be adjusted by adjusting the opening of the flow control valve 31. It is configured to be adjustable. The air conditioner 30 and the flow control valve 31 are air conditioner control valves (not shown) It may operate under the control of your device. The opening degree of the flow control valve 31 is, for example, that of the air conditioner 3 The difference between the temperature of the air (supply air) after heat exchange, as measured by 0, and the set temperature of the air conditioner 30. The minutes may be calculated and control may be performed based on that difference. Also, for example, the airflow in a heat exchanger The fan's rotation speed may be controlled to adjust the amount. Flow control from air conditioner 30 The chilled and hot water that exits through valve 31 flows into the return header 25 as return chilled and hot water.

[0030] The control device 100 has a memory that stores data and programs, and based on the program, A computer or information It may also be a processing unit. The memory may be, for example, a random access device that can temporarily store data. Volatile memory devices such as RAM, hard disks, and other devices used for long-term data storage. It may include non-volatile auxiliary storage devices such as flash memory. The processor, For example, CPU (Central Processing Unit) and MPU (Mic It may be a Processing Unit (RO), etc. The control device 100 stores The program is transmitted to the control unit 10 via a non-temporary storage medium that is readable by a computer. It may be provided as 0. Note that the control device 100 is a control device for a heat source machine (not shown), a pump The control device and the control device for the air conditioner can each perform at least some of their respective functions. It could be structured as a Noh play.

[0031] Figure 2 is a schematic diagram showing an example of the functional configuration of the control device 100 according to the embodiment. The device 100 has, for example, a storage unit 110 and a processing unit 120. The storage unit 110 is, for example The heat source unit operating status table 111, the pump operating status table 112, and the heat source unit energy The table 113 for changes in ghee consumption and the table 114 for changes in pump energy consumption are stored. do.

[0032] Figure 3 is a schematic diagram showing an example of the data structure of the heat source unit operating status table 111.

[0033] The heat source unit operating status table 111 records the operating status of the heat source unit 10 (heat source unit operating status). This is a table. The heat source operating status table 111 is, for example, as shown in Figure 3, the heat source The heat source is associated with the heat source operating status ID, which is identification information used to identify the operating status of the machine. The number of machines in operation, the set temperature S, the chilled / hot water outlet temperature TO, and the chilled / hot water inlet temperature TI may be included.

[0034] The number of operating heat source units is the number of operating heat source units out of at least one heat source unit 10 provided in the chilled / hot water system 1. This is the number of operating heat source units 10. The number of operating heat source units is, for example, the number of heat source units control (not shown). The set temperature S can be obtained from the device. The set temperature S is obtained from the heat source unit operating in the chilled / hot water system 1. The set temperature is 10 [°C]. The set temperature S is the set temperature SC [°C] for cold water, or the set temperature for hot water. The temperature SH [°C] may be constant. The set temperature S is, for example, from a control device for a heat source (not shown). It is obtainable. The chilled / hot water outlet temperature TO is detected by the chilled / hot water outlet temperature sensor 12. The hot water outlet temperature is [°C]. The cold water outlet temperature TO is the cold water outlet temperature. The temperature may be TOC [°C], or the hot water outlet temperature TOH [°C]. The hot water inlet temperature TI is the temperature of the hot and cold water inlet detected by the hot and cold water inlet temperature sensor 13 [°C]. ]. The chilled water inlet temperature TI is the chilled water inlet temperature TIC [°C], and This can be the hot water inlet temperature TIH [°C].

[0035] Figure 4 is a schematic diagram showing an example of the data structure of the pump operating status table 112. The operating status table 112 shows the operating status of the pump 20 (primary pump 21 and secondary pump 22). This is a table that records the status (pump operating status). The pump operating status table 112 is: For example, as shown in Figure 4, the pump operation is an identification information used to identify the pump operating status. The number of pumps in operation, the pump operating frequency F, and the supply temperature T of the chilled / hot water are associated with the status ID. It may include S.

[0036] The number of pumps in operation is the number of pumps out of at least one pump 20 provided in the chilled / hot water system 1. This is the number of pumps 20 in operation. The number of pumps in operation is, for example, controlled by a pump control system (not shown). It can be obtained from the device. The pump operating frequency F is the operating frequency in the chilled / hot water system 1. The operating frequency F [Hz] of the pump 20 is determined by the individual pumps in operation. The value may be different for each pump 20, or the same value may apply to multiple pumps 20 that are in operation. It may also be a value of 1. In particular, pump 20 (primary pump 2) belonging to the same chilled / hot water circulation system. The pump operating frequency F of pump 1 and secondary pump 22) may be the same. Pump operating frequency F can be obtained, for example, from a pump control device (not shown). The supply temperature TS of the chilled / hot water is the supply temperature. This is the temperature [°C] of the supply chilled / hot water detected by the temperature sensor 14. The supply chilled / hot water temperature TS is , the temperature of the supplied cold water, which is the cold water supply temperature TSC [°C], or the temperature of the supplied hot water, which is the hot water supply temperature The temperature can be expressed as TSH [°C].

[0037] Figure 5 is a schematic diagram showing an example of the data structure of the heat source energy consumption change table 113. The heat source energy consumption change table 113 is an example of the first table, The energy of the heat source unit 10 when the set temperature S of the heat source unit 10 changes by a predetermined value. - The change in consumption (change in energy consumption of the heat source) is recorded in correspondence with the operating status of the heat source. This is a table. The heat source energy consumption change table 113 is shown, for example, in Figure 5. As shown, the pre-change energy consumption ER of the heat source unit is associated with the operating status ID of the heat source unit. When the set temperature S of the heat source unit 10 increases by a predetermined value, the energy consumption E of the heat source unit after the change UR, the change in energy consumption ΔEUR of the heat source unit, and the set temperature S of the heat source unit 10 are Energy consumption EDR of the heat source unit after a decrease of a fixed value, and energy consumption of the heat source unit It may include the change in cost ΔEDR.

[0038] The heat source unit operating status ID included in the heat source unit energy consumption change table 113 is the heat source unit This corresponds to the heat source unit operating status ID included in the operating status table 111. Energy consumption ER is the energy of heat source 10 in the operating state of the heat source, as indicated by the heat source operating state ID. This is the amount of energy consumed. The energy consumption ER of the heat source before the change is, for example, the energy of the heat source 10. The volume of gas consumed per unit time when the ghee source is gas (unit: [m³] ^3 / s, etc.), or when the energy source of the heat source unit 10 is electricity, power (unit It may be specified as [kW], etc.

[0039] The energy consumption of the heat source after the change is EUR when the set temperature S of the heat source 10 increases by a predetermined value. This is the energy consumption of the heat source unit 10 in the operating state after the change. Energy consumption EUR is similar to the energy consumption ER of the heat source before the change, for example, the heat source The volume of gas consumed per unit time when the energy source is gas. (Unit: [m^3 / s] etc.), or when the energy source of the heat source unit 10 is electricity. It may also be specified as power (unit: [kW], etc.). Heat source energy consumption change ΔE UR (an example of the change in the first energy consumption) is the energy consumption ER of the heat source before the change and the change The difference between the energy consumption of the heat source unit (EUR) and the actual energy consumption is EUR-ER.

[0040] The energy consumption EDR of the heat source after the change occurs when the set temperature S of the heat source 10 decreases by a predetermined value. This is the energy consumption of the heat source unit 10 in the operating state after the change. Energy consumption EDR is similar to the energy consumption ER of the heat source before the change, for example, the heat source The volume of gas consumed per unit time when the energy source is gas. (Unit: [m^3 / s] etc.), or when the energy source of the heat source unit 10 is electricity. It may also be specified as power (unit: [kW], etc.). Heat source energy consumption change ΔE DR (an example of the first energy consumption change) is the energy consumption ER of the heat source before the change and the change The difference between the energy consumption of the heat source unit (EDR) and the EDR (Energy Recovery Rate) is EDR-ER.

[0041] Figure 6 is a schematic diagram showing an example of the data structure of the pump energy consumption change table 114. The pump energy consumption change table 114 is an example of the second table, When the set temperature S of the heat source unit 10 changes by a predetermined value, the pump 20 (primary pump 21 and the change in the pump energy consumption of the secondary pump 22) (change in pump energy consumption) This is a table that records data corresponding to the pump's operating status. Pump energy consumption changes The quantity table 114 is associated with the pump operating status ID, as shown in Figure 6, for example. Furthermore, the pump operating frequency FP before the change, the pump energy consumption EP before the change, and the setting of the heat source unit 10 When the constant temperature S increases by a predetermined value, the pump operating frequency FUP and the pump energy after the change... Energy consumption EUP, pump energy consumption change ΔEUP, and heat source unit 10 When the set temperature S decreases by a predetermined value, the changed pump operating frequency FDP and the changed pump frequency This may include energy consumption EDP and change in pump energy consumption ΔEDP.

[0042] The pump operating status ID included in the pump energy consumption change table 114 is the pump This corresponds to the pump operating status ID included in the operating status table 112. The rotation frequency FP is the operating frequency of pump 20 in the pump operating state indicated by the pump operating state ID. Yes. The pump energy consumption EP before the change is the pump operating state indicated by the pump operating state ID. This is the sum of the energy consumption for each of the 20 pumps. In particular, the same for each hot and cold water system. When controlled at a single operating frequency F, the pre-change pump energy consumption EP is calculated for each system. It may also be defined as the sum of the energy consumption of pump 20. Pump energy consumption before change The consumption EP may also be specified as electricity (unit: [kW], etc.).

[0043] The changed pump operating frequency FUP is obtained after the set temperature S of the heat source unit 10 has increased by a predetermined value. This is the operating frequency for each of the 20 pumps when the pumps are running. Pump energy consumption after change. The consumption EUP is calculated when the pump is operating after the set temperature S of the heat source unit 10 has increased by a predetermined value. This is the sum of the energy consumption for each of the 20 pumps. In particular, the energy consumption of each of the 20 pumps for each hot and cold water system. When controlled at the same operating frequency F, the changed pump energy consumption EUP is per system. It may also be defined as the sum of the energy consumption of the pump 20. Pump energy after change - Consumption EUP may be specified as electricity (unit: [kW], etc.). Pump energy - The change in consumption ΔEUP (an example of the change in the second energy consumption) is equal to the pump energy before the change. The difference between the consumption EP and the pump energy consumption EUP after the change, i.e., EUP-EP be.

[0044] The changed pump operating frequency FDP is obtained after the set temperature S of the heat source unit 10 has decreased by a predetermined value. This is the operating frequency for each of the 20 pumps when the pumps are running. Pump energy consumption after change. The EDP consumption is calculated when the pump is operating after the set temperature S of the heat source unit 10 has decreased by a predetermined value. This is the sum of the energy consumption for each of the 20 pumps. In particular, the energy consumption of each of the 20 pumps for each hot and cold water system. When controlled at the same operating frequency F, the changed pump energy consumption EDP is per system. It may also be defined as the sum of the energy consumption of the pump 20. Pump energy after change - Consumption EDP may be specified as electricity (unit: [kW], etc.). Pump energy - The change in consumption ΔEDP (an example of the second energy consumption change) is equal to the pump energy before the change. The difference between the consumption EP and the pump energy consumption EDP after the change, i.e., EDP-EP be.

[0045] Referring again to Figure 2, the processing unit 120 provided in the control device 100 will be described. The 120 comprises a table creation unit 130 and an operation balance control unit 140.

[0046] The table creation unit 130 generates, for example, a heat source machine operating status table 111, a pump operating status table Table 112, Heat source energy consumption change table 113, and pump energy consumption Tables such as the change amount table 114 are created. The table creation unit 130, for example, operates A status information acquisition unit 131, an energy consumption acquisition unit 132, a heat source unit control unit 133, and It includes an energy consumption change calculation unit 134.

[0047] The operating status information acquisition unit 131 acquires, for example, information indicating the operating status of the heat source unit 10 (heat source unit operating status). The system acquires status information and records it in the heat source unit operating status table 111. Operating status information acquisition unit 1 31 indicates, for example, whether the heat source unit 10 is operating from a control device for the heat source unit (not shown). The operating status information acquisition unit 131 may acquire the following information: By calculating the number of operating heat source units 10 in system 1, the number of operating units is obtained. This is also fine. The operating status information acquisition unit 131 acquires, for example, information from a heat source control device (not shown) to the heat source The set temperature S of 10 may be obtained. The operating status information acquisition unit 131 may, for example, obtain the chilled / hot water outlet. From the temperature sensor 12, the chilled water outlet temperature TO(which is the chilled water outlet temperature TOC[ The temperature may be obtained as follows: [°C], or the hot water outlet temperature TOH [°C]. The status information acquisition unit 131, for example, obtains the chilled / hot water inlet temperature TI( from the chilled / hot water inlet temperature sensor 13). The cold water inlet temperature TIC [°C], or the hot water inlet temperature The temperature (°C) may be obtained. The operating status information acquisition unit 131 may, for example, acquire the pump 20 Information indicating the operating status (pump operating status information) is obtained, and the pump operating status table 112 It records the information. The operating status information acquisition unit 131 receives, for example, information from a pump control device (not shown) Information indicating whether or not the pump 20 is operating may be obtained. Operating status information acquisition unit 131 This involves aggregating the information to calculate the number of pumps 20 operating in the chilled / hot water system 1. The number of operating units may be obtained by doing so. The operating status information acquisition unit 131 may, for example, not be shown. From the pump control device shown, the operating frequency of the pump 20 operating in the chilled / hot water system 1 The wavenumber F [Hz] may be obtained. The operating frequency F is obtained for each of the operating pumps 20. The values ​​may be different, or they may be the same for multiple operating pumps 20. Good. In particular, pumps 20 (primary pump 21 and secondary pump) belonging to the same hot and cold water circulation system. The pump operating frequency F in 22) may be the same.

[0048] The energy consumption acquisition unit 132 acquires, for example, the energy consumption ER of the heat source unit (hot and cold water system In System 1, all heat source units 10 that are in operation generate heat to be supplied to the chilled and hot water. Obtain the sum of the amount of energy consumed per unit time for the energy source, and the operating status of the heat source. The energy consumption change amount of the heat source unit is recorded in the heat source unit energy consumption change amount table 113, corresponding to the ID. The consumption acquisition unit 132 is, for example, provided on the heat source unit 10 when the heat source unit 10 is of the fuel combustion type. The energy consumption ER of the heat source unit may be obtained from the energy consumption sensor 11. Furthermore, the energy consumption acquisition unit 132, for example, when the heat source unit 10 is electric, will perform the following: By calculating the energy consumption ER of the heat source based on the formula, the energy of the heat source - You may obtain the consumption amount ER. Heat source energy consumption ER [kW] = Heat source rated power consumption [kW] * (Heat source operating frequency) Wave number [Hz] / heat source equipment rated frequency [Hz])^3

[0049] The energy consumption acquisition unit 132 acquires, for example, the pump energy consumption EP (hot and cold water system Energy consumption per unit time for all pumps 20 operating in System 1 The sum of the consumption amounts is obtained and associated with the pump operating status ID, and the change in pump energy consumption is calculated. The data is recorded in Table 114. The energy consumption acquisition unit 132 is, for example, a pump (not shown). After obtaining various parameters from the control device, the pump e By calculating the energy consumption EP, the pump energy consumption EP is obtained. Alternatively, the energy consumption acquisition unit 132 calculates the pump energy based on, for example, the following formula. - You may calculate the consumption amount EP. Pump energy consumption EP [kW] = Pump rated power consumption [kW] * (Pump operating frequency) (Wavenumber [Hz] / Pump Rated Frequency [Hz])^3

[0050] The heat source control unit 133, for example, in creating various tables, sets the set temperature of the heat source unit 10. The temperature S is controlled. The heat source control unit 133 controls the set temperature S of the heat source unit 10 to a predetermined value. The value may be changed (increased or decreased). The predetermined value is set, for example, for the heat source unit 10. This may be the smallest unit for changing the set temperature S of the heat source unit 10.

[0051] Furthermore, the predetermined value is determined when the set temperature S of the heat source unit 10 is increased by the predetermined value. The change in the first variable that defines the energy consumption ER of the heat source unit, and the set temperature S of the heat source unit 10. The first modification specifies the energy consumption ER of the heat source when it is reduced by the predetermined value. The change in the number can be small enough to be considered equivalent. The first variable is the energy of the heat source unit 10. - This could be the consumption rate, or the operating frequency of the heat source unit 10 if the heat source unit 10 is electric. It's okay to have it.

[0052] Furthermore, the predetermined value is determined when the set temperature S of the heat source unit 10 is increased by the predetermined value. The change in the second variable that defines the energy consumption EP of the pump 20, and the setting of the heat source unit 10. The energy consumption EP of the pump 20 when the temperature S is reduced by the predetermined value is specified. The change in the second variable can be small enough to be considered identical to the change in the second variable that is being determined. The second variable is pump 2 The operating frequency may be 0. The energy consumption change calculation unit 134 calculates the setting of the heat source unit 10. The amount of change in energy consumption of the heat source unit 10 and pump 20 when the constant temperature S is changed. The energy consumption change calculation unit 134 calculates the calculated energy consumption change. This information is recorded in various tables.

[0053] The energy consumption change calculation unit 134 calculates, for example, "when the set temperature S is increased by a predetermined value." In the case of "changing the energy consumption of the heat source unit ΔEUR" and "reducing the set temperature S by a predetermined value", The "Change in Energy Consumption of Heat Source Machine ΔEDR" in the case of "Heat Source Machine Energy Consumption" is calculated, and the energy consumption of the heat source machine The change amount is recorded in the change amount table 113. The energy consumption change amount calculation unit 134 calculates, for example, "Set The "change in pump energy consumption ΔEUP" when the constant temperature S is increased by a predetermined value, and "Change in pump energy consumption ΔEDP when the set temperature S is reduced by a predetermined value" This is calculated and recorded in the pump energy consumption change table 114.

[0054] The determination unit 135, for example, when creating various tables, determines the heat source unit 10 and the pump 20 The determination unit 135 makes a determination regarding the operating status. For example, if the set temperature S of the heat source unit 10 increases, the determination unit 135 makes a determination. To confirm whether or not it is possible to control the temperature, the set temperature S of the heat source unit 10 is at its maximum value. The determination unit 135 may determine whether or not it exists. For example, it may reduce the set temperature S of the heat source unit 10. To confirm whether or not control is possible, the set temperature S of the heat source unit 10 is at its minimum value. The determination unit 135 may determine whether or not the set temperature S of the heat source unit 10 is reduced. By performing this control, we can verify whether it is possible to increase the output of the pump 20. To do this, it may be determined whether or not the pump 20 is in its maximum operating state. The determination unit 135 For example, by controlling the set temperature S of the heat source unit 10, the output of the pump 20 To determine whether it is possible to reduce the force, the pump 20 is set to its minimum operating state. You may determine whether or not it is true.

[0055] The operational balance control unit 140 controls, for example, the energy consumption cost of the entire chilled / hot water system 1. The set temperature S of the heat source unit 10 is controlled so that it decreases. The operation balance control unit 140 controls the operation balance control unit, For example, the operating state determination unit 141, the energy cost change amount calculation unit 142, and the heat source control It comprises a section 143 and a determination section 144.

[0056] The operating state determination unit 141, for example, acquires various parameters of the heat source unit 10, and then determines the heat The current operating status of the heat source unit 10 is determined by referring to the heat source unit operating status table 111. For example, the operating state determination unit 141 controls the operating stage of the heat source machine from the control device for the heat source machine (not shown). The number and set temperature S are obtained, and the chilled / hot water outlet temperature TO is obtained from the chilled / hot water outlet temperature sensor 12. The chilled / hot water inlet temperature TI is obtained from the chilled / hot water inlet temperature sensor 13. Operating status determination unit 141 This involves referring to the heat source unit operating status table 111 to obtain the following information (number of heat source units in operation, Supports set temperature S, chilled / hot water outlet temperature TO, and chilled / hot water inlet temperature TI (with errors within a specified range). The operating state (including certain cases) is determined as the current operating state of the heat source unit 10.

[0057] The operating state determination unit 141, for example, acquires various parameters of the pump 20, and then... Refer to the pump operating status table 112 to determine the current operating status of pump 20. For example, the operating status determination unit 141 obtains whether each pump 20 is operating or not, and then The number of pumps currently in operation (20) is calculated as the number of pumps in operation. Furthermore, the operating status is determined. Unit 141 acquires the pump operating frequency F from each pump 20. The operating state determination unit 141 By referring to the pump operating status table 112, these acquired information (number of pumps in operation, pumps) The operating state corresponding to the pump operating frequency (F) is determined as the current operating state of the pump 20. .

[0058] The energy cost change calculation unit 142 calculates when the set temperature S of the heat source unit 10 increases by a predetermined value. The change in energy cost of the chilled / hot water system 1 in the case of this change in energy cost The change amount ΔCUS (an example of the change amount of the first energy cost) and the set temperature S of the heat source unit 10 The change in energy cost of the chilled / heated water system 1 when it decreases by a fixed amount is E The energy cost change ΔCDS (an example of the second energy cost change) is calculated.

[0059] The change in energy cost ΔCUS is, for example, the change in energy cost of the heat source equipment ΔCUR This is calculated as the sum of the change in pump energy cost ΔCUP. Here, the heat source equipment The energy cost change ΔCUR occurs when the set temperature S of the heat source unit 10 increases by a predetermined value. This is the change in energy cost equivalent to the change in energy consumption ΔEUR of the heat source equipment. Furthermore, the change in pump energy cost ΔCUP is calculated when the set temperature S of the heat source unit 10 is a predetermined value. Energy cost equivalent to the change in pump energy consumption ΔEUP when it increases This is the change in the amount of the change. In particular, the pump 20 is controlled at the same operating frequency F for each chilled and hot water system. In this case, the change in pump energy cost ΔCUP is the change in pump energy cost for each system. It may also be defined as the sum of the amounts.

[0060] The change in energy cost ΔCDS is, for example, the change in energy cost of the heat source equipment ΔCDR. This is calculated as the sum of the change in pump energy cost ΔCDP. Here, the heat source equipment The energy cost change ΔCDR is calculated when the set temperature S of the heat source unit 10 decreases by a predetermined value. This is the change in energy cost equivalent to the change in energy consumption ΔEDR of the heat source equipment. Furthermore, the change in pump energy cost ΔCDP is calculated when the set temperature S of the heat source unit 10 is a predetermined value. Energy cost equivalent to the change in pump energy consumption ΔEDP when it decreases This is the change in the amount of the change. In particular, the pump 20 is controlled at the same operating frequency F for each chilled and hot water system. In this case, the change in pump energy cost ΔCDP is the change in pump energy cost for each system. It may also be defined as the sum of the amounts.

[0061] Each energy cost change (heat source energy cost change ΔCUR, ΔCDR, Pon The change in energy cost (ΔCUP, ΔCDP) is calculated by adding energy to each change in energy consumption. -Calculated by multiplying by the cost of the source. The cost unit price of the energy source of the heat source unit 10 is , the cost per unit of gas when the energy source of the heat source unit 10 is gas (unit: [ It may be [yen / m^3] etc., or when the energy source of the heat source unit 10 is electricity. The cost unit price of the electricity in question (unit: [yen / kW], etc.) may also be used. The cost unit price of the ghee source is the cost of the electricity when the energy source of pump 20 is electricity. Cost unit price (unit: [yen / kW], etc.) may also be used. These cost unit prices are market prices. It may be a value calculated by any method, or it may be a value calculated by any other method.

[0062] The heat source control unit 143 controls the cooling when the set temperature S of the heat source unit 10 increases by a predetermined value. The change in energy cost ΔCUS, which is the change in energy cost of hot water system 1, Energy of the chilled / hot water system 1 when the set temperature S of the heat source unit 10 decreases by a predetermined value. Based on the change in energy costs ΔCDS, which is the change in cost, the chilled and hot water system The set temperature S of the heat source unit 10 is controlled to reduce the energy cost of 1. Specifically For example, the heat source control unit 143 will, when the set temperature S of the heat source unit 10 increases by a predetermined value... Energy cost change Δ is the amount of change in the energy cost of the chilled / heated water system 1 in [location]. If CUS is less than zero, the heat source unit 10 increases the set temperature S of the heat source unit 10 by a predetermined value. It may be done. Also, the heat source control unit 143 will, for example, determine if the set temperature S of the heat source unit 10 is a predetermined value. The change in energy cost of the chilled / heated water system 1 when it decreases by only a certain amount is the amount of energy - If the cost change amount ΔCDS is less than zero, the heat source unit 10 will set the set temperature S The value may be reduced by a predetermined amount. Also, the heat source control unit 143 may, for example, control the energy cost When both the change amount ΔCUS and the energy cost change amount ΔCDS are positive values. The heat source unit 10 may maintain the set temperature S. The control of the set temperature S in 10 may be performed according to the determination result of the determination unit 144.

[0063] The determination unit 144, for example, when the heat source control unit 143 controls the heat source unit 10, determines the heat source unit The determination unit 144 makes a determination regarding the operating status of the 10 and the pump 20. For example, the determination unit 144 determines the operating status of the heat source unit 1 To confirm whether it is possible to control the setting temperature S of the heat source unit 10 to increase the setting temperature S of 0, It may also be determined whether the constant temperature S is not at its maximum value. The determination unit 144 may, for example, determine whether the heat source unit 10 To confirm whether it is possible to control the setting temperature S of the heat source unit 10, It may also be determined whether the temperature S is not at its minimum value. The determination unit 144, for example, determines whether the heat source unit 10 By controlling the set temperature S to decrease, the output of the pump 20 can be increased. To determine whether or not this is the case, you can determine whether or not the pump 20 is operating at maximum capacity. i. The determination unit 144, for example, controls the set temperature S of the heat source unit 10 to increase To determine whether it is possible to reduce the output of pump 20, pump 20 You may also determine whether or not it is in a minimum operating state.

[0064] Figure 7 shows various tables created by the table creation unit 130 of the control device 100 according to this embodiment. This is an operation flow diagram showing an example of the operation process related to creation. Below, the heat source unit 10 burns fuel This explanation assumes it is a baked product.

[0065] (S101) The determination unit 135 determines whether the set temperature S of the heat source unit 10 is not the maximum value. If 35 determines that the set temperature S of the heat source unit 10 is not at its maximum value (S101; Yes), The process proceeds to step S102.

[0066] (S102) The determination unit 135 determines whether the pump 20 is not in the minimum operating state. If it is determined that pump 20 is not in the minimum operating state (S102; Yes), the process will proceed to step Proceed to S103.

[0067] (S103) The operating status information acquisition unit 131 acquires heat source unit operating status information indicating the operating status of the heat source unit 10. Then, it is recorded in the heat source unit operating status table 111, corresponding to the heat source unit operating status ID. In this unit, the operating status information acquisition unit 131 receives information from a control device for the heat source unit (not shown) on the operating platform of the heat source unit 10. The number is obtained and associated with the heat source unit operating status ID, and recorded in the heat source unit operating status table 111. Record. In addition, the operating status information acquisition unit 131 records the set temperature S from the control device for the heat source unit (not shown). The chilled water outlet temperature TO is obtained from the chilled water outlet temperature sensor 12, and the chilled water inlet temperature is obtained. After obtaining the chilled / hot water inlet temperature TI from sensor 13, these are associated with the heat source unit operating status ID. Attach it and record the operating status of the heat source unit in the heat source unit operating status table 111.

[0068] (S104) The energy consumption acquisition unit 132 acquires the energy consumption ER of the heat source unit and the energy of the heat source unit In the energy consumption change table 113, the operating status ID of the heat source unit in step S103 corresponds to Accordingly, it is recorded as "Energy Consumption ER of Heat Source Equipment Before Change". Specifically, energy - The consumption acquisition unit 132 receives the energy consumption sensor 11 installed in the heat source unit 10, and then receives the heat After obtaining the energy consumption ER of the heat source unit, the heat source unit energy consumption change table 113 In step S103, the "heat source unit energy before change" is associated with the operating status ID of the heat source unit. - Record as "Consumption ER".

[0069] (S105) The operating status information acquisition unit 131 acquires pump operating status information indicating the operating status of the pump 20. Then, it is recorded in the pump operating status table 112, corresponding to the pump operating status ID. In this unit, the operating status information acquisition unit 131 receives information from a pump control device (not shown) on the operating platform of the pump 20. The number is obtained and associated with the pump operating status ID, and recorded in the pump operating status table 112. Record. In addition, the operating status information acquisition unit 131 records the pump operation from a pump control device (not shown). After obtaining the frequency F and the supply temperature TS of the chilled / hot water from the supply temperature sensor 14, these are then used The pump operating status ID is associated with the pump operating status and recorded in the pump operating status table 112.

[0070] (S106) The energy consumption acquisition unit 132 acquires the pump energy consumption EP, and the pump energy In the energy consumption change table 114, the pump operating status ID in step S105 corresponds to Accordingly, it is recorded as "Pump energy consumption EP before change". Specifically, energy - The consumption acquisition unit 132 acquires various parameters and then uses those parameters to acquire various parameters. By calculating the pump energy consumption EP, the pump energy consumption EP Obtain this and associate it with the pump operating status ID in step 105 to consume pump energy. The change in energy consumption is recorded in the consumption change table 114. The energy consumption acquisition unit 132 is based on the following formula. Then, calculate the pump energy consumption EP. Pump energy consumption EP [kW] = Pump rated power consumption [kW] * (Pump operating frequency) (Wavenumber [Hz] / Pump Rated Frequency [Hz])^3

[0071] (S107) The heat source control unit 133 increases the set temperature S of the heat source unit 10 by a predetermined value. This is the smallest unit set in the heat source unit 10 for changing the temperature of the heat source unit 10. In this case, the smallest unit (predetermined value) is the set temperature S of the heat source unit 10. Change in the energy consumption ER of the heat source (an example of the first variable) when only the value is increased. The amount and the energy of the heat source when the set temperature S of the heat source unit 10 is reduced by the predetermined value. The change in ghee consumption ER (an example of the first variable) is assumed to be small enough to be considered equivalent. Furthermore, the smallest unit (predetermined value) increases the set temperature S of the heat source unit 10 by the predetermined value. In this case, the change in the pump operating frequency F (an example of the second variable) and the setting of the heat source unit 10. When the temperature S is reduced by the predetermined value, the pump operating frequency F (an example of the second variable) The change in ) is assumed to be small enough to be considered equivalent to that change.

[0072] (S108) The energy consumption acquisition unit 132 acquires the "change" when the "set temperature S is increased by a predetermined value". "Energy consumption of the heat source after modification (EUR)" and "When the set temperature S is reduced by a predetermined value" The "Energy Consumption Data Record (EDR) of the Heat Source Unit after Change" is obtained, and the change in energy consumption of the heat source unit is recorded in the table. In step 113, the operating status ID of the heat source unit in step S104 is recorded in correspondence with the specific details. In terms of energy consumption acquisition, the energy consumption acquisition unit 132 is connected to the energy consumption sensor installed in the heat source unit 10. After obtaining the energy consumption ER of the heat source unit from Sense 11, the change in energy consumption of the heat source unit Table 113 shows the "Changed Heat Source Energy" for "When the set temperature S is increased by a predetermined value". It is recorded as "Ghee consumption EUR". Also, as mentioned above, the predetermined value in step S107 This refers to the energy of the heat source when the set temperature S of the heat source unit 10 is increased by the predetermined value. - When the amount of change in consumption ER and the set temperature S of the heat source unit 10 are reduced by the predetermined value, To the extent that it can be considered equivalent to the change in the energy consumption ER of the heat source (an example of the first variable). It is small. Based on this, the energy consumption acquisition unit 132 uses the energy consumption sensor 1 The energy consumption ER of the heat source unit obtained from 1 is used in the heat source unit energy consumption change table 1. 13. When the set temperature S is reduced by a predetermined value, the energy consumption of the heat source after the change E Record as "DR".

[0073] (S109) The energy consumption change calculation unit 134 calculates the case when "the set temperature S is increased by a predetermined value". "Change in energy consumption of the heat source unit ΔEUR" and "When the set temperature S is reduced by a predetermined value" The "Change in energy consumption of the heat source unit ΔEDR" is calculated, and the change in energy consumption of the heat source unit ΔEDR is calculated. It is recorded on cable 113. Specifically, the energy consumption change calculation unit 134 calculates the heat source energy In the Energy Consumption Change Table 113, the "Energy Consumption ER of the Heat Source Machine Before Change" and, "Energy consumption of the heat source after the change when the set temperature S is increased by a predetermined value" The difference between these two values, i.e., EUR-ER, is defined as "change in energy consumption of the heat source unit ΔEUR". The calculation is performed and recorded in the heat source energy consumption change table 113. The change amount calculation unit 134 calculates the "pre-change heat" in the heat source energy consumption change amount table 113. "Energy consumption ER of the source unit" and "When the set temperature S is reduced by a predetermined value" The difference between "heat source energy consumption EDR" and "EDR-ER" is calculated as "heat source energy consumption EDR". This is calculated as "Ghee consumption change ΔEDR" and added to Heat Source Equipment Energy Consumption Change Table 113. Record it.

[0074] (S110) The energy consumption acquisition unit 132 acquires the "change" when the "set temperature S is increased by a predetermined value". "Post-modification pump energy consumption EUP" and "when the set temperature S is reduced by a predetermined value" The "Pump Energy Consumption After Change (EDP)" is obtained, and the change in pump energy consumption is measured. In step 114, the pump operating status ID of step S106 is recorded in association with the specific details. Specifically, the energy consumption acquisition unit 132 acquires the pump operating frequency F and then... The "changed pump operating frequency FUP" is defined as "when the set temperature S is increased by a predetermined value". Based on the following formula, the "changed pump" when "the set temperature S is increased by a predetermined value" The "Energy Consumption EUP" is calculated and recorded in the Pump Energy Consumption Change Table 114. do. Pump energy consumption after change EUP [kW] = Pump rated power consumption [kW] * (change (FUP [Hz] / Pump Rated Frequency [Hz])^3

[0075] Furthermore, as described above, the predetermined value in step S107 is the set temperature S of the heat source unit 10. The change in the pump operating frequency F (an example of the second variable) when increased by a predetermined value, and , when the set temperature S of the heat source unit 10 is reduced by the predetermined value, the pump operating frequency The change in F (an example of a second variable) is small enough to be considered identical. Based on this, Ener The ghee consumption acquisition unit 132 determines the set temperature S based on the acquired pump operating frequency F. Calculate the "Pump Operating Frequency FDP after Change" when the value is reduced by a fixed amount. Then, The energy consumption acquisition unit 132 calculates the set temperature S by a predetermined value based on the following formula. The "Energy Consumption of Pumps After Change" in the case of "changed pump energy consumption" is calculated, and the pump energy consumption Record the change in Table 114. Pump energy consumption after change EDP [kW] = Pump rated power consumption [kW] * (change (FDP [Hz] / Pump Rated Frequency [Hz])^3

[0076] (S111) The energy consumption change calculation unit 134 calculates the case when "the set temperature S is increased by a predetermined value". "Change in pump energy consumption ΔEUP" and "When the set temperature S is reduced by a predetermined value" The "change in pump energy consumption ΔEDP" is calculated, and the change in pump energy consumption It is recorded on cable 114. Specifically, the energy consumption change calculation unit 134 calculates the pump energy In the energy consumption change table 114, the "pump energy consumption EP before change" and, "Pump energy consumption EUP after change" when "the set temperature S is increased by a predetermined value" The difference between these two, i.e., EUP-EP, is defined as "change in pump energy consumption ΔEUP". The calculation is performed and recorded in the Pump Energy Consumption Change Table 114. The change amount calculation unit 134 calculates the "pre-change pump energy consumption change amount table 114". "Sample energy consumption EP" and "When the set temperature S is reduced by a predetermined value" The difference between "Pump energy consumption EDP" and "EP", i.e., EDP-EP, is "Pump energy consumption EDP". The change in ghee consumption ΔEDP is calculated and added to the pump energy consumption change table 114. Record. Next, the process returns to step S101.

[0077] In step S101, if it is determined that the set temperature of the heat source unit 10 is at its maximum value ( S101; No), or in step S102, if the pump 20 is in the minimum operating state If determined to be No (S102), the process proceeds to step S112.

[0078] (S112) The determination unit 135 determines whether the set temperature S of the heat source unit 10 is not the minimum value. If 35 determines that the set temperature S of the heat source unit 10 is not the minimum value (S112; Yes), The process proceeds to step S113.

[0079] (S113) The determination unit 135 determines whether the pump 20 is not in the maximum operating state. If it is determined that the pump is not operating at maximum capacity (S113; Yes), the process proceeds to step S Proceed to 114.

[0080] (S114) The operating status information acquisition unit 131 acquires heat source unit operating status information indicating the operating status of the heat source unit 10. Then, it is recorded in the heat source unit operating status table 111, corresponding to the heat source unit operating status ID. The operating status information acquisition unit 131 acquires the number of operating heat source units 10, which are control devices for heat source units (not shown). This information is acquired and recorded in the heat source unit operating status table 111, associated with the heat source unit operating status ID. Furthermore, the operating status information acquisition unit 131 acquires the set temperature S from the heat source control device (not shown). The chilled / hot water outlet temperature TO is obtained from the chilled / hot water outlet temperature sensor 12, and the chilled / hot water inlet temperature sensor After obtaining the chilled / hot water inlet temperature TI from SA13, these are mapped to the heat source unit operating status ID. The operating status of the heat source unit is recorded in the heat source unit operating status table 111.

[0081] (S115) The energy consumption acquisition unit 132 acquires the energy consumption ER of the heat source unit and the energy of the heat source unit In the energy consumption change table 113, the heat source operating status ID in step S114 corresponds to Accordingly, it is recorded as "Energy Consumption ER of Heat Source Equipment Before Change". Specifically, energy - The consumption acquisition unit 132 receives the energy consumption sensor 11 installed in the heat source unit 10, and then receives the heat After obtaining the energy consumption ER of the heat source unit, the heat source unit energy consumption change table 113 In step S114, the "heat source unit energy before change" is associated with the operating status ID of the heat source unit. Record it as "Consumption ER".

[0082] (S116) The operating status information acquisition unit 131 acquires pump operating status information indicating the operating status of the pump 20. Then, it is recorded in the pump operating status table 112, corresponding to the pump operating status ID. In this unit, the operating status information acquisition unit 131 receives information from a pump control device (not shown) on the operating platform of the pump 20. The number is obtained and recorded in the pump operating status table 112. Also, operating status information is obtained. Unit 131 acquires the pump operating frequency F from a pump control device (not shown) and the supply temperature sensor After obtaining the supply temperature TS of the chilled and hot water from 14, these are recorded in the pump operating status table 112. Record.

[0083] (S117) The energy consumption acquisition unit 132 acquires the pump energy consumption EP, and the pump energy In the energy consumption change table 114, the pump operating status ID in step S116 corresponds to Accordingly, it is recorded as "Pump energy consumption EP before change". Specifically, energy - The consumption acquisition unit 132 acquires various parameters and then uses those parameters to acquire various parameters. By calculating the pump energy consumption EP, the pump energy consumption EP Obtain the pump operating status ID in step S116 and associate it with the pump energy The consumption change amount is recorded in the consumption change amount table 114. The energy consumption acquisition unit 132 is based on the following: Then, calculate the pump energy consumption EP. Pump energy consumption EP [kW] = Pump rated power consumption [kW] * (Pump operation) (Frequency [Hz] / Pump Rated Frequency [Hz])^3

[0084] (S118) The heat source control unit 133 reduces the set temperature S of the heat source unit 10 by a predetermined value in step S107. To make someone do it.

[0085] (S119) The energy consumption acquisition unit 132 acquires the "change" when the "set temperature S is reduced by a predetermined value". Energy consumption of the heat source after modification (EDR) and when the set temperature S is increased by a predetermined value. The "Energy Consumption of Heat Source Equipment After Change" is obtained, and the change in energy consumption of the heat source equipment is recorded in the table. In step 113, the operating status ID of the heat source unit in step S115 is recorded in correspondence with the specific details. In terms of energy consumption acquisition, the energy consumption acquisition unit 132 is connected to the energy consumption sensor installed in the heat source unit 10. After obtaining the energy consumption ER of the heat source unit from Sense 11, the change in energy consumption of the heat source unit Table 113 shows the "Changed Heat Source Energy" for "When the set temperature S is reduced by a predetermined value". It will be recorded as "Ghee Consumption EDR". Also, as mentioned above, the set temperature S of the heat source unit 10 The change in the energy consumption ER of the heat source unit when it is increased by a predetermined value, and the change in the energy consumption ER of the heat source unit 1 When the set temperature S of 0 is reduced by a predetermined value, the energy consumption ER of the heat source unit ( The amount of change of one variable (an example) can be considered identical. Therefore, the energy consumption acquisition unit 132 The energy consumption ER of the heat source unit obtained from the energy consumption sensor 11 is used for the heat source unit energy In the energy consumption change table 113, the "change" when the "set temperature S is increased by a predetermined value" is shown. Record this as "Energy consumption of the heat source unit in EUR".

[0086] (S120) The energy consumption change calculation unit 134 calculates the case when "the set temperature S is reduced by a predetermined value". "Change in energy consumption of the heat source unit ΔEDR" and "When the set temperature S is increased by a predetermined value" The "Change in energy consumption of the heat source unit ΔEUR" is calculated, and the change in energy consumption of the heat source unit It is recorded on cable 113. Specifically, the energy consumption change calculation unit 134 calculates the heat source energy In the Energy Consumption Change Table 113, the "Energy Consumption ER of the Heat Source Machine Before Change" and, "Energy consumption EDR of the heat source unit after the change when the set temperature S is reduced by a predetermined value" The difference between these two, i.e., EDR-ER, is defined as "Change in energy consumption of heat source equipment ΔEDR". The calculation is performed and recorded in the heat source energy consumption change table 113. The change amount calculation unit 134 calculates the "pre-change heat" in the heat source energy consumption change amount table 113. "Energy consumption ER of the source unit" and "When the set temperature S is increased by a predetermined value" The difference between "heat source energy consumption EUR" and "heat source energy consumption EUR" is calculated as EUR-ER. This is calculated as "Ghee consumption change ΔEUR" and added to Heat Source Energy Consumption Change Table 113. Record it.

[0087] (S121) The energy consumption acquisition unit 132 acquires the "change" when the "set temperature S is reduced by a predetermined value". "Energy consumption of pump after modification (EDP)" and "When the set temperature S is increased by a predetermined value" The "Pump Energy Consumption (EUP) after Change" is obtained, and the change in pump energy consumption is recorded in the table. In step 114, the pump operating status ID of step S117 is recorded in correspondence with the specific details. Specifically, the energy consumption acquisition unit 132 acquires the pump operating frequency F and then... The "changed pump operating frequency FDP" is defined as "when the set temperature S is reduced by a predetermined value". Based on the following formula, the "changed pump" when the "set temperature S is reduced by a predetermined value" Calculate "energy consumption EDP" and record it in the pump energy consumption change table 114 . Post-change pump energy consumption EDP[kW] = rated pump power consumption [kW]*(change post-change pump operating frequency FDP[Hz] / rated pump frequency [Hz])³

[0088] Further, as described above, the predetermined value in step S107 is small enough that the amount of change in pump operating frequency F (an example of a second variable) when the set temperature S of the heat source device 10 is increased by the predetermined value can be regarded as equivalent to the amount of change in pump operating frequency F (an example of a second variable) when the set temperature S of the heat source device 10 is decreased by the predetermined value. Based on this, the energy consumption acquisition unit 132 calculates "post-change pump operating frequency FUP" for "the case where the set temperature S is increased by a predetermined value" based on the acquired pump operating frequency F. Then, the energy consumption acquisition unit 132 calculates "post-change pump energy consumption EUP" for "the case where the set temperature S is increased by a predetermined value" based on the following formula, and records it in the pump energy consumption change table 114. Post-change pump energy consumption EUP[kW] = rated pump power consumption [kW]*(change post-change pump operating frequency FUP[Hz] / rated pump frequency [Hz])³

[0089] (S122) The energy consumption change calculation unit 134 calculates "pump energy consumption change amount ΔEDP" for "the case where the set temperature S is decreased by a predetermined value" and "pump energy consumption change amount ΔEUP" for "the case where the set temperature S is increased by a predetermined value", and records them in the pump energy consumption change table 114. Specifically, the energy consumption change calculation unit 134 ​​​​​​In the energy consumption change table 114, the "pump energy consumption EP before change" and, "Pump energy consumption EDP after the change when the set temperature S is reduced by a predetermined value" The difference between these two values, i.e., EDP-EP, is defined as "Pump energy consumption change ΔEDP". The calculation is performed and recorded in the Pump Energy Consumption Change Table 114. The change amount calculation unit 134 calculates the "pre-change pump energy consumption change amount table 114". "Sample energy consumption EP" and "When the set temperature S is increased by a predetermined value" The difference between "pump energy consumption EUP" and "EP", i.e., EUP-EP, is "pump energy consumption EUP". The change in ghee consumption is calculated as "ΔEUP" and added to the pump energy consumption change table 114. Record. The process then returns to step S112.

[0090] In step S112, if it is determined that the set temperature S of the heat source unit is the minimum value (S 112; No), or in step S113, it is determined that the pump 20 is in the maximum operating state. If the condition is met (S113; No), the process ends.

[0091] As described above, the control device 100 according to this embodiment is a heat source unit of the chilled / hot water system 1. By actually increasing / decreasing the set temperature S of the 10, the heat source unit 10 and the pump 20 The operating state of each device is changed, and the change in energy consumption, etc., before and after the change is acquired and recorded. Record the system configuration, installation environment, operating status, etc., related to the chilled / hot water system 1. The actual behavior of the heat source unit 10 and pump 20, taking into account various parameters, is reflected in the energy calculation. It will be possible to acquire and record the change in ghee consumption.

[0092] Figure 8 shows the operational balance control unit 140 of the control device 100 according to this embodiment. This is an operation flow diagram showing an example of the operation process related to the control of the chilled / hot water system. System 1 defines the energy cost of the chilled / hot water system 1 with the set temperature S of the heat source unit 10 as the defined range. Assume that the graph of is constructed to be a function that is concave upwards.

[0093] (S201) The operating state determination unit 141 determines the current operating state of the heat source unit 10. Specifically, The operating status determination unit 141 receives the number of operating heat source units and the set temperature from a control device for heat source units (not shown). S is obtained, the chilled / hot water outlet temperature TO is obtained from the chilled / hot water outlet temperature sensor 12, and the chilled / hot water inlet temperature After obtaining the chilled / hot water inlet temperature TI from the temperature sensor 13, the heat source unit operating status table 111 is obtained. Refer to the obtained parameters (set temperature S, chilled / hot water outlet temperature TO, chilled / hot water inlet temperature TI) Determine the operating status of the heat source unit corresponding to ).

[0094] (S202) The operating status determination unit 141 determines the current operating status of the pump 20. Specifically, The operating status determination unit 141 determines the number of operating pumps and the pump operation status from a pump control device (not shown). After obtaining the rotation frequency F and the supply temperature TS of the chilled / hot water from the supply temperature sensor 14, the pump starts Refer to the operating status table 112 to obtain the parameters (number of pumps in operation, pump operating frequency). Determine the pump operating status corresponding to the wavenumber F and the supply temperature (TS) of the chilled / hot water.

[0095] (S203) The energy cost change calculation unit 142 increases the set temperature S of the heat source unit 10 by a predetermined value. The change in energy cost ΔCUR of the heat source unit in the case of this, and the set temperature S of the heat source unit 10 calculating a heat source device energy cost change amount ΔCDR obtained when the set temperature S is decreased by a predetermined value . Specifically, the energy cost change amount calculation unit 142 retrieves from the heat source device energy consumption change table 113 the "heat source device energy consumption change amount ΔEUR" corresponding to the heat source device operating state determined in step S201 for the case where "the set temperature S of the heat source device is increased by a predetermined value", obtains said value, and multiplies it by the cost per unit of the energy source of the heat source device 10 to obtain a value, which is calculated as the heat source device energy cost change amount ΔCUR obtained when the set temperature S of the heat source device 10 is increased by a predetermined value. Further, the energy cost change amount calculation unit 142 retrieves from the heat source device energy consumption change table 113 the "heat source device energy consumption change amount ΔEDR" corresponding to the heat source device operating state determined in step S201 for the case where "the set temperature S of the heat source device is decreased by a predetermined value", obtains said value, and multiplies it by the cost per unit of the energy source of the heat source device 10 to obtain a value, which is calculated as the heat source device energy cost change amount ΔCDR obtained when the set temperature S of the heat source device 10 is decreased by a predetermined value.

[0096] (S204) The energy cost change amount calculation unit 142 calculates a pump energy cost change amount ΔCUP obtained when the set temperature S of the heat source device 10 is increased by a predetermined value, and a pump energy cost change amount ΔCDP obtained when the set temperature S of the heat source device 10 is decreased by a predetermined value . Specifically, the energy cost change amount calculation unit 142 retrieves from the pump energy consumption change table 114 the "pump energy consumption change amount ΔEUP" corresponding to the pump operating state determined in step S202 for the case where "the set temperature S of the heat source device is increased by a predetermined value" After obtaining this, it is obtained by multiplying it by the cost unit price of the energy source for pump 20. The value is the pump energy when the set temperature S of the heat source unit 10 is increased by a predetermined value. The cost change amount is calculated as ΔCUP. Furthermore, the energy cost change amount calculation unit 142, From the pump energy consumption change table 114, the pump determined in step S202 "When the set temperature S of the heat source unit corresponding to the operating state is reduced by a predetermined value" After obtaining the "energy consumption change ΔEDP", the cost of the energy source for pump 20 is added to it. The value obtained by multiplying by the unit price is used to reduce the set temperature S of the heat source unit 10 by a predetermined value. The change in pump energy cost in each case is calculated as ΔCDP.

[0097] (S205) The energy cost change calculation unit 142 increases the set temperature S of the heat source unit 10 by a predetermined value. Energy cost is the change in energy cost of the chilled / heated water system 1 when this is done. Change amount ΔCUS and the chilled / hot water when the set temperature S of the heat source unit 10 is reduced by a predetermined value. The energy cost change ΔCDS, which is the change in energy cost of System 1, is calculated. Specifically, the energy cost change calculation unit 142 calculates the energy cost change of the heat source unit. The sum of the change in pump energy cost ΔCUP and the amount of change in pump energy cost ΔCUR (ΔCUR + ΔCUP) The chilled / hot water system 1 when the set temperature S of the heat source unit 10 is increased by a predetermined value. The energy cost change amount ΔCUS is calculated. Also, the energy cost change amount calculation unit 1 42 represents the change in energy cost ΔCDR of the heat source unit and the change in energy cost ΔC of the pump. The sum with DP (ΔCDR + ΔCDP) is obtained by reducing the set temperature S of the heat source unit 10 by a predetermined value. The change in energy cost of the chilled / heated water system 1 in this case is calculated as ΔCDS.

[0098] (S206) The heat source control unit 143 controls the set temperature S of the heat source unit 10 when it is increased by a predetermined value. The change in energy cost ΔCUS of the chilled / hot water system 1 and the set temperature S of the heat source unit 10 are predetermined. The change in energy cost ΔCDS of the chilled / hot water system 1 when the value is reduced by only that amount. Compare each to zero. Energy cost change ΔCUS and energy cost change If both ΔCUS and ΔCDS are greater than zero ("ΔCUS>0" and "ΔCDS>0"), The process returns to step S201.

[0099] (S207) Energy of the chilled / hot water system 1 when the set temperature S of the heat source unit 10 is increased by a predetermined value If the energy cost change amount ΔCUS is less than zero (ΔCUS < 0), the determination unit 144 determines that It determines whether the set temperature S of the heat source unit 10 is at its maximum value, or whether the pump 20 is operating at its minimum value. Determine. If the result of the determination in step S207 is negative (S207; No) (heat source unit 1 If the set temperature S is at its maximum value, or if the pump 20 is in its minimum operating state, the process is Return to step S201.

[0100] (S208) If the result of the determination in step S207 is positive (S207; Yes) (heat source unit 10 (When the set temperature is not at its maximum value and the pump 20 is not operating at its minimum capacity), Heat source unit 143 increases the set temperature of the heat source unit 10 by a predetermined value. This predetermined value is the same as described above. The predetermined value of step S107 may be used. After step S208, the process proceeds to step S201. return.

[0101] (S209) Energy of the chilled / hot water system 1 when the set temperature S of the heat source unit 10 is reduced by a predetermined value If the energy cost change amount ΔCDS is less than zero (ΔCDS < 0), the determination unit 144 determines that The set temperature S of the heat source unit 10 is not at the minimum value, or the pump 20 is not operating at maximum capacity. Determine. If the result of the determination in step S209 is negative (S209; No) (heat source When the set temperature S of machine 10 is at its minimum value, or when pump 20 is operating at its maximum capacity, The logic returns to step S201.

[0102] (S210) If the result of the judgment in step S209 is positive (S209; Yes) (heat source unit 10 The set temperature is not at the minimum value, and the pump 20 is not operating at maximum capacity. 43 reduces the set temperature of the heat source unit 10 by a predetermined value. This predetermined value is determined by the steps described above. The value may be the predetermined value of step S107. After step S210, the process returns to step S201. ru.

[0103] As described above, in the chilled / hot water system 1 according to this embodiment, the set temperature S of the heat source unit 10 is The change in energy cost of the chilled / heated water system 1 when it increases by a constant amount is the amount of energy change. The energy cost change amount ΔCUS and the case when the set temperature S of the heat source unit 10 decreases by a predetermined value. Energy cost change ΔCD is the change in energy cost of the chilled / heated water system 1. Based on S, the energy cost of the chilled / hot water system 1 decreases overall in the direction of the heat source Because the set temperature of machine 10 is continuously adjusted, the energy cost of the chilled / heated water system 1 continues. This makes it possible to reduce the amount of reduction.

[0104] The embodiments described above are provided to facilitate understanding of the present invention and do not limit the present invention. It is not intended to be interpreted as such. Each element of the embodiment, as well as its arrangement, materials, and conditions. The shape and size are not limited to those exemplified and can be changed as appropriate. Furthermore, the configurations shown in different embodiments can be partially substituted or combined. It is Noh. [Explanation of Symbols]

[0105] 1...Hot and cold water system, 10...Heat source unit, 11...Energy consumption sensor, 12...Hot and cold water outlet Inlet temperature sensor, 13... Hot and cold water inlet temperature sensor, 14... Supply temperature sensor, 20... Pump, 21 ...primary pump, 22...secondary pump, 23...bypass valve, 24a...supply primary header and 24b ...forward secondary header, 25...return header, 26...bypass pipe, 27...bypass valve, 30...air conditioning Waki, 31...Flow control valve, 100...Control device, 110...Memory unit, 111...Heat source unit operating status Table 112...Pump operating status Table 113...Heat source energy consumption change amount table Bull, 114... Pump energy consumption change table, 120... Processing unit, 130... Table 131...Operating status information acquisition unit, 132...Energy consumption acquisition unit, 133...Heat Power source control unit, 134... Energy consumption change calculation unit, 140... Operating state determination unit, 142... Energy cost change calculation unit, 143... Heat source unit control unit, 144... Determination unit

Claims

1. A control device for controlling a heat transfer system, which includes a heat source unit for supplying heat to a heat transfer medium, heat consumption equipment for performing heat exchange between the heat transfer medium and a load, and heat transfer equipment for transporting the heat transfer medium so that it circulates between the heat source unit and the heat consumption equipment, Energy consumption change acquisition unit, From a first table in which the first heat source energy consumption change amount, which is the change in the energy consumption of the heat source when the set temperature of the heat source increases by a predetermined value, and the second heat source energy consumption change amount, which is the change in the energy consumption of the heat source when the set temperature of the heat source decreases by the predetermined value, are recorded in association with each operating state of the heat source, the first heat source energy consumption change amount and the second heat source energy consumption change amount corresponding to the current operating state of the heat source are obtained. The first change in energy consumption of the heat conveying equipment, which is the change in the energy consumption of the heat conveying equipment when the set temperature of the heat source increases by the predetermined value, and the second change in energy consumption of the heat conveying equipment, which is the change in the energy consumption of the heat conveying equipment when the set temperature of the heat source decreases by the predetermined value, are obtained from a second table recorded in association with each operating state of the heat conveying equipment, and the first change in energy consumption of the heat conveying equipment and the second change in energy consumption of the heat conveying equipment are obtained in association with the current operating state of the heat conveying equipment. Energy consumption change acquisition unit, An energy cost change calculation unit calculates a first energy cost change, which is the change in the energy cost of the heat transfer system when the set temperature of the heat source increases by a predetermined value, based on the acquired change in the energy consumption of the first heat source and the change in the energy consumption of the first heat transfer equipment, and calculates a second energy cost change, which is the change in the energy cost of the heat transfer system when the set temperature of the heat source decreases by a predetermined value, based on the acquired change in the energy consumption of the second heat source and the change in the energy consumption of the second heat transfer equipment, A heat source control unit controls the set temperature of the heat source unit so as to reduce the energy cost of the heat transfer fluid system based on the first energy cost change and the second energy cost change, A control device equipped with the following features.

2. The control device according to claim 1, wherein the predetermined value is the smallest unit set in the heat source unit for changing the temperature of the heat source unit.

3. The control device according to claim 1, wherein the predetermined value is small enough that the change in the first variable that defines the energy consumption of the heat source when the set temperature of the heat source is increased by the predetermined value is equivalent to the change in the first variable when the set temperature of the heat source is decreased by the predetermined value.

4. The control device according to claim 3, wherein the first variable is the energy consumption of the heat source or the operating frequency of the heat source.

5. The control device according to claim 3, wherein the predetermined value is small enough that the change in the second variable that defines the energy consumption of the heat transport equipment when the set temperature of the heat source is increased by the predetermined value is equivalent to the change in the second variable when the set temperature of the heat source is decreased by the predetermined value.

6. The control device according to claim 5, wherein the second variable is the operating frequency of the heat transfer equipment.

7. The heat transfer system is configured such that the graph of the energy cost of the heat transfer system, defined within the range of the set temperature of the heat source, is a downward-facing parabola. The control device according to claim 1, wherein the heat source control unit increases the set temperature of the heat source by the predetermined value if the first energy cost change is a negative value, and decreases the set temperature of the heat source by the predetermined value if the second energy cost change is a negative value.

8. The control device according to claim 7, wherein the heat source control unit maintains the set temperature of the heat source unit when both the first energy cost change and the second energy cost change are positive values.

9. A control method for controlling a heat transfer system, which includes a heat source unit for supplying heat to a heat transfer medium, heat consumption equipment for performing heat exchange between the heat transfer medium and a load, and heat conveying equipment for transporting the heat transfer medium so that it circulates between the heat source unit and the heat consumption equipment, Steps for obtaining changes in energy consumption, From a first table in which the first heat source energy consumption change amount, which is the change in the energy consumption of the heat source when the set temperature of the heat source increases by a predetermined value, and the second heat source energy consumption change amount, which is the change in the energy consumption of the heat source when the set temperature of the heat source decreases by the predetermined value, are recorded in association with each operating state of the heat source, the first heat source energy consumption change amount and the second heat source energy consumption change amount corresponding to the current operating state of the heat source are obtained. The system obtains a first heat transfer equipment energy consumption change, which is the change in the energy consumption of the heat transfer equipment when the set temperature of the heat source increases by the predetermined value, a second heat transfer equipment energy consumption change, which is the change in the energy consumption of the heat transfer equipment when the set temperature of the heat source decreases by the predetermined value, and the first heat transfer equipment energy consumption change and the second heat transfer equipment energy consumption change corresponding to the current operating state of the heat transfer equipment from a second table recorded in association with each operating state of the heat transfer equipment. Steps for obtaining changes in energy consumption, An energy cost change calculation step, which involves calculating a first energy cost change amount, which is the change in the energy cost of the heat transfer system when the set temperature of the heat source increases by a predetermined value, based on the acquired change in the energy consumption of the first heat source and the change in the energy consumption of the first heat transfer equipment, and calculating a second energy cost change amount, which is the change in the energy cost of the heat transfer system when the set temperature of the heat source decreases by a predetermined value, based on the acquired change in the energy consumption of the second heat source and the change in the energy consumption of the second heat transfer equipment, A heat source control step that controls the set temperature of the heat source unit so as to reduce the energy cost of the heat transfer fluid system based on the first energy cost change and the second energy cost change, A control method including

10. A computer for controlling a heat transfer system, which includes a heat source unit for supplying heat to a heat transfer medium, heat consumption equipment for performing heat exchange between the heat transfer medium and a load, and heat transfer equipment for transporting the heat transfer medium so that it circulates between the heat source unit and the heat consumption equipment, Energy consumption change acquisition unit, From a first table in which the first heat source energy consumption change amount, which is the change in the energy consumption of the heat source when the set temperature of the heat source increases by a predetermined value, and the second heat source energy consumption change amount, which is the change in the energy consumption of the heat source when the set temperature of the heat source decreases by the predetermined value, are recorded in association with each operating state of the heat source, the first heat source energy consumption change amount and the second heat source energy consumption change amount corresponding to the current operating state of the heat source are obtained. The system obtains a first heat transfer equipment energy consumption change, which is the change in the energy consumption of the heat transfer equipment when the set temperature of the heat source increases by the predetermined value, a second heat transfer equipment energy consumption change, which is the change in the energy consumption of the heat transfer equipment when the set temperature of the heat source decreases by the predetermined value, and the first heat transfer equipment energy consumption change and the second heat transfer equipment energy consumption change corresponding to the current operating state of the heat transfer equipment from a second table recorded in association with each operating state of the heat transfer equipment. Energy consumption change acquisition unit, Based on the acquired change in energy consumption of the first heat source and the change in energy consumption of the first heat transfer equipment, When the set temperature of the heat source unit increases by the predetermined value, the first energy cost change amount, which is the change in the energy cost of the heat transfer system, is calculated, and based on the obtained second heat source unit energy consumption change amount and second heat transfer equipment energy consumption change amount, An energy cost change calculation unit calculates a second energy cost change amount, which is the change in energy cost of the heat transfer medium system when the set temperature of the heat source unit decreases by the predetermined value, A heat source control unit controls the set temperature of the heat source unit so as to reduce the energy cost of the heat transfer fluid system based on the first energy cost change and the second energy cost change, A program designed to function as such.

11. A table creation device that creates a first table and a second table by changing the set temperature of the heat source by a predetermined value in a heat transfer system, the heat source being used to supply heat to a heat transfer medium, a heat consumption equipment that performs heat exchange between the heat transfer medium and a load, and a heat transfer equipment that transports the heat transfer medium so that the heat transfer medium circulates between the heat source being used and the heat consumption equipment, An operating status information acquisition unit acquires heat source machine operating status information indicating the operating status of the heat source machine and heat conveying equipment operating status information indicating the operating status of the heat conveying equipment. A heat source control unit that performs the following actions: increasing the set temperature of the heat source unit by a predetermined value, and decreasing the set temperature of the heat source unit by the predetermined value. Energy consumption change calculation unit, The first change in energy consumption of the heat source unit, which is the change in the energy consumption of the heat source unit when the set temperature of the heat source unit increases by the predetermined value, and the second change in energy consumption of the heat source unit, which is the change in the energy consumption of the heat source unit when the set temperature of the heat source unit decreases by the predetermined value, are calculated and recorded in the first table in correspondence with each operating state of the heat source unit. The following are calculated and recorded in the second table, corresponding to each operating state of the heat conveying equipment: a first change in energy consumption of the heat conveying equipment, which is the change in energy consumption of the heat conveying equipment when the set temperature of the heat source increases by the predetermined value, and a second change in energy consumption of the heat conveying equipment, which is the change in energy consumption of the heat conveying equipment when the set temperature of the heat source decreases by the predetermined value. Energy consumption change calculation unit, A table creation device equipped with the following features.

12. The table creation device according to claim 11, wherein the energy consumption change amount calculation unit calculates the second heat source energy consumption change amount based on a first variable that defines the energy consumption of the heat source, obtained by increasing the set temperature of the heat source by the predetermined value, or calculates the first heat source energy consumption change amount based on the first variable obtained by decreasing the set temperature of the heat source by the predetermined value.

13. The table creation device according to claim 11, wherein the energy consumption change amount calculation unit calculates the second heat conveying equipment energy consumption change amount based on a second variable that defines the energy consumption of the heat conveying equipment, obtained by increasing the set temperature of the heat source by the predetermined value, or calculates the first heat conveying equipment energy consumption change amount based on the second variable obtained by decreasing the set temperature of the heat source by the predetermined value.

14. A method for creating a first table and a second table in a heat transfer system, which includes a heat source for supplying heat to a heat transfer medium, heat consumption equipment for performing heat exchange between the heat transfer medium and a load, and heat transfer equipment for transporting the heat transfer medium so that the heat transfer medium circulates between the heat source and the heat consumption equipment, by changing the set temperature of the heat source by a predetermined value, An operating status information acquisition step that acquires heat source machine operating status information indicating the operating status of the heat source machine and heat conveying equipment operating status information indicating the operating status of the heat conveying equipment, A heat source control step that performs a control to increase the set temperature of the heat source by a predetermined value, and a control to decrease the set temperature of the heat source by the predetermined value. A step in calculating the change in energy consumption, The first change in energy consumption of the heat source unit, which is the change in the energy consumption of the heat source unit when the set temperature of the heat source unit increases by the predetermined value, and the second change in energy consumption of the heat source unit, which is the change in the energy consumption of the heat source unit when the set temperature of the heat source unit decreases by the predetermined value, are calculated and recorded in the first table in correspondence with each operating state of the heat source unit. The following are calculated and recorded in the second table, corresponding to each operating state of the heat conveying equipment: a first change in energy consumption of the heat conveying equipment, which is the change in energy consumption of the heat conveying equipment when the set temperature of the heat source increases by the predetermined value, and a second change in energy consumption of the heat conveying equipment, which is the change in energy consumption of the heat conveying equipment when the set temperature of the heat source decreases by the predetermined value. Steps for calculating the change in energy consumption, How to create a table that includes this.

15. A program for causing a computer to function as a table creation device that creates a first table and a second table by changing the set temperature of the heat source by a predetermined value in a heat transfer system, which includes a heat source for supplying heat to a heat transfer medium, heat consumption equipment for performing heat exchange between the heat transfer medium and a load, and heat conveying equipment for transporting the heat transfer medium so that the heat transfer medium circulates between the heat source and the heat consumption equipment, The aforementioned computer, An operating status information acquisition unit acquires heat source machine operating status information indicating the operating status of the heat source machine and heat conveying equipment operating status information indicating the operating status of the heat conveying equipment. A heat source control unit that performs the following actions: increasing the set temperature of the heat source unit by a predetermined value, and decreasing the set temperature of the heat source unit by the predetermined value. Energy consumption change calculation unit, The first change in energy consumption of the heat source unit, which is the change in the energy consumption of the heat source unit when the set temperature of the heat source unit increases by the predetermined value, and the second change in energy consumption of the heat source unit, which is the change in the energy consumption of the heat source unit when the set temperature of the heat source unit decreases by the predetermined value, are calculated and recorded in the first table in correspondence with each operating state of the heat source unit. The following are calculated and recorded in the second table, corresponding to each operating state of the heat conveying equipment: a first change in energy consumption of the heat conveying equipment, which is the change in energy consumption of the heat conveying equipment when the set temperature of the heat source increases by the predetermined value, and a second change in energy consumption of the heat conveying equipment, which is the change in energy consumption of the heat conveying equipment when the set temperature of the heat source decreases by the predetermined value. Energy consumption change calculation unit, A program designed to function as such.

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