Control device, control program, and heat source system for a heat source system

Abstract

The present invention provides a control device, control program, and heat source system for a heat source system that can maximize performance indicators. [Solution] A control device for a heat source system S having multiple heat sources H, comprising: a heat source information storage unit 111 that stores heat source information for the multiple heat sources H; an operation pattern storage unit 112 that stores multiple operation patterns which determine combinations of heat sources H to be started and heat sources H to be stopped for the multiple heat sources H; a first coefficient calculation unit 124 that calculates a first coefficient for each operation pattern used to calculate the heat production efficiency based on the heat source system information for each of the multiple operation patterns; a heat production efficiency calculation unit 123 that calculates the heat production efficiency by applying the first coefficient for each operation pattern to the heat source system information for each of the multiple operation patterns; and an operation pattern determination unit 129 that determines the operation pattern which maximizes the heat production efficiency.

Description

Technical Field

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[0001] The present invention relates to a control device for a heat source system, a control program, and a heat source system.

Background Art

[0002] In a heat source system, multiple heat sources may be controlled by a computer using the performance indicators of the heat source system. Examples of the performance indicators of the heat source system include, for example, primary energy consumption, energy consumption cost, carbon dioxide emissions, COP (Coefficient Of Performance), etc. In the control of the heat source system, the operation of the heat source system is performed so that the performance indicator used for control becomes an optimal value. For example, in the control of multiple heat sources, there is a technique of performing operation number control with the target value of the outlet temperature of the heat source as the reference temperature to maximize the performance indicator.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The performance indicators of the heat source system change moment by moment depending on the operating environment such as outside air humidity and outside air temperature. Also, the performance indicators of the heat source system may change under the influence of the types, combinations, and number of operating units of multiple heat sources. Therefore, it has been difficult to always maximize the performance indicators of the heat source system.

[0005] The present invention has been proposed to solve the problems of the prior art as described above. Its purpose is to provide a control device for a heat source system, a control program, and a heat source system that can maximize the performance indicator.

Means for Solving the Problems

[0006] To achieve the above objectives, the control device for the heat source system of the present invention has the following features. (1) A control device for a heat source system having multiple heat sources, comprising: a heat source information storage unit that stores heat source information for the multiple heat sources; an operation pattern storage unit that stores a plurality of operation patterns which determine combinations of heat sources to be started and heat sources to be stopped for the multiple heat sources; a first coefficient calculation unit which calculates a first coefficient for each operation pattern used to calculate the heat production efficiency for each of the plurality of operation patterns based on heat source system information; a heat production efficiency calculation unit which calculates the heat production efficiency for each of the plurality of operation patterns by applying the first coefficient for each operation pattern to the heat source system information; and an operation pattern determination unit which determines the operation pattern which maximizes the heat production efficiency.

[0007] (2) At least one of the plurality of heat sources is an air-cooled chiller, the heat source system information includes chilled water temperature, ambient air temperature, and heat production quantity, and the heat production efficiency calculation unit is configured to calculate the heat production efficiency of the air-cooled chiller by multiplying the variables of chilled water temperature, ambient air temperature, and heat production quantity by the first coefficient for each operating pattern.

[0008] (3) At least one of the plurality of heat sources is a turbo chiller, the heat source system information includes chilled water temperature, cooling water temperature, and heat production quantity, and the heat production efficiency calculation unit is configured to calculate the heat production efficiency of the turbo chiller by multiplying the variables of chilled water temperature, cooling water temperature, and heat production quantity by the first coefficient for each operating pattern.

[0009] (4) The plurality of heat sources may include an air-cooled chiller and a turbo chiller, and the heat source system information may include chilled water temperature, ambient air temperature, cooling water temperature, and heat production quantity, and the heat production efficiency calculation unit may be configured to calculate the heat production efficiency of the air-cooled chiller by multiplying the variables chilled water temperature, ambient air temperature, and heat production quantity by the first coefficient for each operating pattern, and to calculate the heat production efficiency of the turbo chiller by multiplying the variables chilled water temperature, cooling water temperature, and heat production quantity by the first coefficient for each operating pattern.

[0010] (5) The system may further include: a second coefficient calculation unit that calculates a second coefficient for each of the multiple operating patterns used to calculate the cooling water temperature based on the heat source system information for each of the multiple operating patterns; and a cooling water temperature calculation unit that calculates the cooling water temperature by applying the second coefficient for each of the multiple operating patterns to the heat source system information for each of the multiple operating patterns.

[0011] (6) At least one of the plurality of heat sources is a hot water heat source, the heat source system information includes hot water temperature, ambient temperature, and heat production quantity, and the heat production efficiency calculation unit is configured to calculate the heat production efficiency of the hot water heat source by multiplying the variables of hot water temperature, ambient temperature, and heat production quantity by the first coefficient for each operating pattern.

[0012] (7) The heat source information may include the number of heat sources included in the heat source system, wherein the number of heat sources is the heat source system information, and the heat production efficiency calculation unit may be configured to calculate the heat production efficiency using the number of heat sources as a variable.

[0013] (8) The system further includes an operation data storage unit that stores operation data for each operation pattern, wherein the operation data includes known operation data, and the first coefficient calculation unit may be configured to calculate the first coefficient for each operation pattern based on the heat source system information included in the known operation data.

[0014] (9) The system further includes an operation data storage unit that stores operation data for each operation pattern, wherein the operation data includes known operation data, and the second coefficient calculation unit may be configured to calculate the second coefficient for each operation pattern based on the heat source system information included in the known operation data.

[0015] Furthermore, in order to achieve the above objectives, the control program for the heat source system of the present invention has the following features.

[0016] A control program for a heat source system having multiple heat sources, wherein the program causes a computer or electronic circuit to execute: a heat source information storage step for storing heat source information for the multiple heat sources; an operation pattern storage step for storing multiple operation patterns which determine combinations of heat sources to be started and heat sources to be stopped for the multiple heat sources; a first coefficient calculation step for each of the multiple operation patterns which calculates a first coefficient for each operation pattern used to calculate the heat production efficiency based on heat source system information; a heat production efficiency calculation step for each of the multiple operation patterns which calculates the heat production efficiency by applying the first coefficient for each operation pattern to the heat source system information; and an operation pattern determination step which determines the operation pattern which maximizes the heat production efficiency.

[0017] Furthermore, in order to achieve the above objectives, the heat source system of the present invention has the following features.

[0018] A heat source system having a plurality of heat sources and a control unit for controlling the plurality of heat sources, wherein the control unit includes a heat source information storage unit for storing heat source information of the plurality of heat sources, an operation pattern storage unit for storing a plurality of operation patterns in which combinations of heat sources to be started and heat sources to be stopped are determined for the plurality of heat sources, a first coefficient calculation unit for calculating a first coefficient for each operation pattern used for calculating heat production efficiency based on heat source system information for each of the plurality of operation patterns, a heat production efficiency calculation unit for calculating the heat production efficiency by applying the first coefficient for each operation pattern to the heat source system information for each of the plurality of operation patterns, and an operation pattern determination unit for determining the operation pattern in which the heat production efficiency is maximized. [Advantages of the Invention]

[0019] According to the present invention, it is possible to provide a control device, a control program, and a heat source system of a heat source system that can maximize performance indicators. [Brief Description of the Drawings]

[0020] [Figure 1] It is a schematic diagram showing a schematic configuration of a heat source system according to a first embodiment. [Figure 2] It is a block diagram showing an example of the configuration of a control unit of a heat source system according to a first embodiment. [Figure 3] It is an image diagram of a determination performed by an operation pattern determination unit. [Figure 4] It is a flowchart showing an example of a processing procedure of a first coefficient calculation unit. [Figure 5] It is a flowchart showing an example of a processing procedure of a second coefficient calculation unit. [Figure 6] It is a flowchart showing an example of a processing procedure of an operation pattern determination unit. [Modes for Carrying Out the Invention]

[0021] [1. First Embodiment] [1.1 Configuration] The heat source control device, control program, and heat source system according to the present invention will be described below. Figure 1 is a schematic diagram showing the configuration of the heat source system S. The heat source system S includes multiple heat sources H. In the example in Figure 1, the heat source system S including three heat sources H is shown, but at least two heat sources H are sufficient. Furthermore, there is no upper limit to the number of heat sources H, but the heat source system S can be configured to include, for example, about 30 heat sources H. The number of heat sources H in the heat source system S will be included in the numerical values ​​related to the heat source system S described later.

[0022] Examples of heat sources H include air-cooled chillers and turbo chillers. Air-cooled chillers include modular chillers and may be pump-integrated types with a primary pump built into the chiller, or pumpless types without a built-in pump or header. Turbo chillers include rated turbo and inverter turbo chillers. A rated turbo chiller is a turbo chiller in which the compressor motor operates at a constant rotational speed. An inverter turbo chiller is a turbo chiller in which the rotational speed of the compressor motor is adjusted according to the load using inverter control.

[0023] The multiple heat sources H included in the heat source system S may all be air-cooled chillers, or they may all be turbo chillers. Furthermore, the multiple heat sources H may include both air-cooled chillers and turbo chillers. For example, if the heat source system S includes three heat sources H, three types of air conditioning heat sources may be used: an air-cooled chiller, a turbo chiller (rated), and a turbo chiller (INV). In addition to air-cooled chillers and turbo chillers, other heat sources such as hot water heat sources like heat pumps and absorption chillers can also be applied to heat sources H. While an air-cooled chiller can also be described as a heat pump, here we consider the heat pump as a hot water heat source that extracts hot water by exchanging heat with air. This embodiment assumes a heat source system S with a fixed flow rate ratio distribution, but control is also possible for a heat source system S with a variable flow rate ratio distribution.

[0024] While a detailed explanation is omitted, the heat source system S may include not only the heat source H but also auxiliary heat source equipment such as chilled / hot water pumps, cooling water pumps, cooling towers, fuel pumps, heat exchangers, and cushion tanks. The cooling tower may include fans, circulation pumps, automatic blowdown devices, chemical injection pumps, and antifreeze heaters.

[0025] Each of the heat sources H is connected to the supply chilled water header pipe P1 via piping. Each of the heat sources H is also connected to the return chilled water header pipe P2 via piping. A pump may be provided between the return chilled water header pipe P2 and each heat source H to send chilled water from the return chilled water header pipe P2 to the heat sources H.

[0026] The heat source system S is connected to the load side L via a supply chilled water header pipe P1 and a return chilled water header pipe P2. Therefore, the supply chilled water cooled by the heat source H is supplied to the load side L via the supply chilled water header pipe P1. In addition, the return chilled water from the load side L flows into the heat source system S via the return chilled water header pipe P2.

[0027] The supply chilled water header pipe P1 and the return chilled water header pipe P2 are connected by a bypass pipe P3. The bypass pipe P3 may be equipped with a bypass valve to adjust the differential pressure between the water pressure in the supply chilled water header pipe P1 and the water pressure in the return chilled water header pipe P2. The bypass valve has an open state and a closed state. In addition, a differential pressure may be provided between the supply chilled water header pipe P1 and the return chilled water header pipe P2 in parallel with the bypass pipe P3. The differential pressure gauge measures the water pressure difference between the supply chilled water supplied from the supply chilled water header pipe P1 to the load side L and the return chilled water flowing from the load side L into the return chilled water header pipe P2. As described above, Figure 1 shows a single-pump type heat source system S as an example, but this embodiment can be applied to a double-pump type heat source system S.

[0028] The load side L is an air conditioning system, including, for example, a fan coil unit or an air handling unit. The number of loads is not particularly limited. For example, if the load side L includes a fan coil unit, the chilled water supplied to the fan coil unit from the supply chilled water header pipe P1 via piping exchanges heat with air in a heat exchanger included in the fan coil unit, and then returns to the return chilled water header pipe P2 via piping.

[0029] The heat source system S is equipped with sensors that measure numerical values ​​related to the heat source system S. The sensors include a supply chilled water temperature sensor T1, a return chilled water temperature sensor T2, an ambient temperature and humidity sensor T3, and a flow meter F. The supply chilled water temperature sensor T1 is, for example, installed in the supply chilled water header pipe P1 and is equipped to measure the temperature of the supply chilled water supplied to the load side L. The return chilled water temperature sensor T2 is, for example, installed in the return chilled water piping and is equipped to measure the temperature of the return chilled water flowing in from the load side L.

[0030] The outside temperature and humidity sensor T3 is a sensor capable of measuring the temperature and humidity of the outside air. Regarding humidity, it may measure the relative humidity (%) of the outside air, or the dew point temperature (°C) or wet-bulb temperature (°C) of the outside air. The flow meter F is a sensor that measures the flow rate of recirculated water flowing from the load side L to the heat source system S. However, the flow meter F may also be configured to measure the temperature of the supply water flowing from the heat source system S to the load side L. In addition, the heat source system S may be equipped with other sensors such as a pressure gauge, gas flow meter, calorimeter, and wattage meter to acquire measurement values ​​necessary for controlling the heat source system S.

[0031] The heat source system S further includes a control unit 100 configured to control the heat source H. Figure 2 shows a block diagram illustrating an example of the configuration of the control unit 100 of the heat source system S. The control unit 100 consists of a computer or dedicated electronic circuit that operates with a predetermined program, including a CPU and memory. The control unit 100 may also be configured using a PLC (Programmable Logic Controller). The control unit 100 may also be a computer or the like configured to communicate with the heat source H. The control unit 100 is configured to be connectable to an input unit I and an output unit O. Furthermore, the control unit 100 is configured to acquire measured values ​​from measurement sensors such as a supply chilled water temperature sensor T1, a return chilled water temperature sensor T2, an ambient temperature and humidity sensor T3, and a flow meter F.

[0032] This control unit 100 can be considered as a control device for the heat source H. Alternatively, it can be considered as a control method for the heat source H, where the processing of the control unit 100 is executed by a computer, or as a control program for the heat source H that causes the computer to execute each process of the control method. Furthermore, the processing range in hardware and the processing range in software, including the program, can be set as appropriate and are not limited to any particular configuration.

[0033] The control unit 100 includes a storage unit 110, an operation pattern determination unit 120, an elapsed time determination unit 130, a control condition determination unit 140, and a heat source control unit 150.

[0034] [Storage] The memory unit 110 stores various information necessary for controlling the heat source system S. The memory unit 110 includes a heat source information memory unit 111, an operation pattern memory unit 112, an acquired value memory unit 113, and an operation data memory unit 114.

[0035] The heat source information storage unit 111 is a storage unit that stores heat source information related to the heat sources H included in the heat source system S. Heat source information includes the number of heat sources H and the types of heat sources. For example, the heat source information storage unit 111 stores that the heat source system S has three heat sources H (let's call them heat source H1, heat source H2, and heat source H3). The heat source information storage unit 111 also stores the type of each heat source H, such as heat source H1 being an air-cooled chiller, heat source H2 being a turbo chiller (rated), and heat source H3 being a turbo chiller (INV).

[0036] The operation pattern storage unit 112 is a storage unit that stores multiple operation patterns, which determine the combinations of heat sources H to be started and heat sources H to be stopped for multiple heat sources H stored in the heat source information storage unit 111. For example, if the heat source system S includes three heat sources H, namely heat source H1, heat source H2, and heat source H3, then eight operation patterns will be stored in the operation pattern storage unit 112. An example of an operation pattern is shown in Table 1 below.

[0037] [Table 1] As shown in Table 1 above, the operation pattern storage unit 112 stores multiple operation patterns to cover all combinations of heat sources H to be started and heat sources H to be stopped for the multiple heat sources H included in the heat source system S. However, there is no intention to exclude a configuration in which some of the expected operation patterns are not stored in the operation pattern storage unit 112.

[0038] The acquired value storage unit 113 is a storage unit that stores information acquired from various measurement sensors installed in the heat source system S. The acquired value storage unit 113 stores time-series data that associates real-time information from various measurement sensors with date and time information. The acquired value storage unit 113 stores the supply chilled water temperature measured by the supply chilled water temperature sensor T1, the return chilled water temperature measured by the return chilled water temperature sensor T2, the outside air temperature and humidity measured by the outside air temperature and humidity sensor T3, and the flow rate measured by the flow meter F. In addition, values ​​measured by other measurement sensors such as pressure gauges, gas flow meters, calorimeters, and energy meters can also be stored in the acquired value storage unit 113.

[0039] The operation data storage unit 114 is a storage unit that stores operation data for each operation pattern of the heat source system S. Operation data is time-series data that associates data such as chilled water temperature, ambient air temperature, cooling water temperature, and heat production acquired while the heat source system S is operating in a determined operation pattern with date and time information. Therefore, information acquired from sensors and stored in the acquired value storage unit 113 can also be said to be part of the operation data. For example, even when operated at the same ambient air temperature and ambient air humidity, the operation data will differ depending on the operation pattern. Therefore, the operation data is data associated with each operation data.

[0040] The operating data may be actual measured values, or it may be historical operating data. The historical operating data may be obtained from an existing central monitoring system, etc. Furthermore, it may be edited operating data, such as data from periods of irregular operation that has been removed from the historical operating data. In addition, theoretical values ​​provided by the heat source H manufacturer may be stored as operating data.

[0041] [Driving pattern determination unit] The operation pattern determination unit 120 is a processing unit that determines an operation pattern for controlling multiple heat sources H of the heat source system S. The operation pattern determination unit 120 includes a heat load calculation unit 121, a heat production amount calculation unit 122, a heat production efficiency calculation unit 123, a first coefficient calculation unit 124, a first coefficient update unit 125, a cooling water temperature calculation unit 126, a second coefficient calculation unit 127, a second coefficient update unit 128, and an operation pattern determination unit 129. In the processing of the operation pattern determination unit 120, operation patterns that include a malfunctioning heat source H may be excluded from the operation patterns to be determined by not performing calculations on them in the first place.

[0042] (Heat load calculation section) The heat load calculation unit 121 is a calculation unit that calculates the air conditioning load (heat load of the air conditioning system) of the space to be air-conditioned using various measured values ​​stored in the acquired value storage unit 113. The heat load calculation unit 121 calculates the heat load based on the supply chilled water temperature measured by the supply chilled water temperature sensor T1, the return chilled water temperature measured by the return chilled water temperature sensor T2, and the flow rate measured by the flow meter F. Specifically, the heat load calculation unit 121 determines the heat load by the formula: constant × (return chilled water temperature on the load side - supply chilled water temperature on the load side) × chilled water flow rate on the load side. The heat load calculated by the heat load calculation unit 121 may be used in subsequent calculations of the amount of heat produced and the heat production efficiency.

[0043] (Manufacturing heat amount calculation section) The heat production calculation unit 122 is a calculation unit that calculates the total heat production amount of the heat source system S using various measured values ​​stored in the acquired value storage unit 113. The heat production amount is the amount of heat in the chilled or hot water produced by the heat source H, and can be treated as the same value as the heat load calculated by the heat load calculation unit 121. Therefore, the heat load calculation unit 121 and the heat production calculation unit 122 can be considered as the same processing unit, and both the heat load and the heat production amount can be calculated in a single processing unit based on the supply chilled water temperature measured by the supply chilled water temperature sensor T1, the return chilled water temperature measured by the return chilled water temperature sensor T2, and the flow rate measured by the flow meter F.

[0044] However, the heat production calculation unit 122 can also be configured as a processing unit different from the heat load calculation unit 121, and can be configured to calculate the amount of heat produced by each heat source H based on the inlet temperature, outlet temperature, and flow rate of each heat source H. Furthermore, the amount of heat produced by each heat source H can be totaled to calculate the total amount of heat produced by the entire heat source system S.

[0045] (Thermal production efficiency calculation unit) The heat production efficiency calculation unit 123 is a calculation unit that calculates the heat production efficiency of the heat source system S using heat source system information. Heat production efficiency refers to, for example, "heat production amount / power consumption," "heat production amount / CO2 emissions," and "heat production amount / running cost." Heat source system information is a numerical value that affects heat production efficiency. Heat source system information includes, but is not limited to, the heat production amount calculated by the heat production amount calculation unit 122, various measured values ​​stored in the acquired value storage unit 113, and heat source information stored in the heat source information storage unit 111. The heat production efficiency calculation unit 123 can be configured to calculate the heat production efficiency in real time, for example every second, based on the heat source system information of the operating heat source system S. The heat production efficiency calculation unit 123 calculates the heat production efficiency using the following equation 1.

[0046] (Math 1) In the above number 1 of TIFF2026123458000003.tif34146, each variable is as follows: y: Thermal manufacturing efficiency x1: Cold water temperature [℃] x2: Ambient temperature [°C] x3: Cooling water temperature [℃] x4: Production heat [kW]

[0047] The chilled water temperature is the chilled water outlet temperature, measured by the supply chilled water temperature sensor T1. The ambient air temperature is the ambient air temperature measured by the ambient air temperature and humidity sensor T3. The cooling water temperature is the cooling water temperature from the cooling tower when the heat source H is a turbo chiller, and details will be described later. The heat produced is the heat produced calculated by the heat produced calculation unit 122. Note that the variables are not limited to those listed above; for example, the number of heat sources H in the heat source system S can be used as a variable. Therefore, it is possible to add other variables to the above x1 to x4 to make the number of variables five or more.

[0048] The heat production efficiency calculation unit 123 calculates the heat production efficiency for each of the multiple operating patterns stored in the operating pattern storage unit 112. Since the coefficient ajklm is a unique value for each operating pattern, the heat production efficiency calculation unit 123 uses the corresponding coefficient ajklm for each operating pattern. For x1 to x4 above, the necessary variables differ as follows, depending on the type and combination of heat sources H included in each operating pattern. Air-cooled chiller: Chilled water temperature, ambient temperature, heat output Turbo chiller: Chilled water temperature, cooling water temperature, heat output Air-cooled chiller + turbo chiller: Chilled water temperature, ambient temperature, cooling water temperature, heat output

[0049] In the actual heat source system S, if any of x1, x2, x3, or x4 is not needed to calculate y, the p, q, r, and s related to the unnecessary variables are set to 0. However, the heat production efficiency calculation unit 123 can be considered to include an air-cooled chiller heat production efficiency calculation unit that does not include x3 and r, and a turbo chiller heat production efficiency calculation unit that does not include x2 and q, in the above equation 1. Therefore, the heat production efficiency calculation unit 123 can be said to be a processing unit that calculates the heat production efficiency based on the heat source system information necessary for the calculation.

[0050] (First coefficient calculation unit) As is clear from equation 1, the heat production efficiency is the "sum of multiplying p, q, r, and s by the coefficient ajklm for the multipliers j, k, l, and m from 0." The coefficient ajklm used in this calculation of heat production efficiency corresponds to the first coefficient. Heat source system information such as chilled water temperature [°C], ambient temperature [°C], cooling water temperature [°C], and heat production amount [kW] are all values ​​that affect the heat production efficiency. The measured values ​​x1, x2, x3, and x4 change over time, but the coefficient ajklm in equation 1 is a fixed value. Therefore, because the coefficient ajklm is a fixed value, the heat production efficiency can be calculated based on x1, x2, x3, and x4, which change over time.

[0051] However, each measured value needs to be multiplied by a different coefficient, and the coefficient ajklm is required. The first coefficient calculation unit 124 is a calculation unit that calculates the first coefficient ajklm using the heat source system information included in the operation data of the heat source system S stored in the operation data storage unit 114. Since the first coefficient ajklm is a unique value for each operation pattern, the first coefficient calculation unit 124 calculates the coefficient ajklm for each operation pattern. Since the coefficient ajklm changes depending on the type of heat source H and the difference between the theoretical value and the actual measured value, in this embodiment it is calculated from past operation data that has actually been acquired. The operation data used to calculate the coefficient ajklm may be edited operation data, or theoretical values ​​provided by the manufacturer may be used as operation data. Past operation data, edited operation data, and theoretical values ​​are considered known operation data.

[0052] The first coefficient calculation unit 124 calculates the coefficient ajklm using the least squares method. Specifically, the sum of squared residuals S of equation 1 above is obtained using equation 2 below. (Math 2) TIFF2026123458000004.tif34159

[0053] Then, the first coefficient calculation unit 124 finds the coefficient ajklm by solving a system of equations in equation 3 below, where the partial derivative of the sum of squared residuals S with respect to ajklm is zero. (Math 3) TIFF2026123458000005.tif21159

[0054] The calculation of the coefficient ajklm by the first coefficient calculation unit 124 is preferably performed using past operating data including heat source system information and theoretical values ​​before the operation of the heat source system S. The first coefficient calculation unit 124 outputs the calculated coefficient ajklm to the heat production efficiency calculation unit 123. The heat production efficiency calculation unit 123 applies the coefficient ajklm input from the first coefficient calculation unit 124 to Equation 1 and performs the calculation of the heat production efficiency.

[0055] (First coefficient update section) The first coefficient update unit 125 is a calculation unit that recalculates the first coefficient, ajklm, using actual operating data up to a certain period of time after the start of operation of the heat source system S. The first coefficient update unit 125 may be configured to update the coefficient ajklm for each operating pattern every year, for example. The first coefficient update unit 125 refers to the operating data storage unit 114 for each operating pattern for the past year, for example, and calculates the coefficient ajklm based on the above equations 2 and 3. The first coefficient update unit 125 outputs the calculated coefficient ajklm to the heat production efficiency calculation unit 123. The heat production efficiency calculation unit 123 updates equation 1 with the coefficient ajklm input from the first coefficient update unit 125 and performs subsequent calculations of heat production efficiency.

[0056] (Cooling water temperature calculation section) The cooling water temperature calculation unit 126 is a calculation unit that calculates the cooling water temperature from a cooling tower when the heat source H's auxiliary equipment includes a cooling tower. Therefore, if the heat source H does not include a turbo chiller, it can be said that the calculation of the cooling water temperature is unnecessary. The cooling water temperature calculation unit 126 calculates the cooling water temperature using heat source system information. The heat source system information includes, but is not limited to, the amount of heat produced calculated by the heat production calculation unit 122, various measured values ​​stored in the acquired value storage unit 113, and heat source information stored in the heat source information storage unit 111. The cooling water temperature calculation unit 126 can be configured to calculate the cooling water temperature in real time, for example, every second, based on the heat source system information of the operating heat source system S. The cooling water temperature calculation unit 126 calculates the cooling water temperature using the following equation 4.

[0057] (Math 4) In the above number 4, TIFF2026123458000006.tif38159, each variable is as follows: y: Cooling water temperature [℃] x1: Ambient temperature [°C] x2: Outdoor relative humidity [%] or outdoor dew point temperature [°C] or outdoor wet-bulb temperature [°C] x3: Production heat [kW] x4: Cold water temperature [℃]

[0058] The outside air temperature is the outside air temperature measured by the outside air temperature and humidity sensor T3. The outside air relative humidity, outside air dew point temperature, or outside air wet-bulb temperature are also measured by the outside air temperature and humidity sensor T3. The heat of production is the heat of production calculated by the heat of production calculation unit. The chilled water temperature is the supply chilled water temperature measured by the supply chilled water temperature sensor T1.

[0059] The cooling water temperature calculation unit 126 calculates the cooling water temperature for each of the multiple operating patterns stored in the operating pattern storage unit 112. Since the coefficient ajklm is a unique value for each operating pattern, the cooling water temperature calculation unit 126 uses the corresponding coefficient ajklm for each operating pattern. In the actual heat source system S, if any of x1, x2, x3, or x4 is not needed to calculate y, the p, q, r, and s related to the unnecessary variables are set to 0. For example, if the chilled water outlet temperature of the heat source H is constant, x4 (chilled water temperature) is not needed. The cooling water temperature calculation unit 126 outputs the calculated cooling water temperature to the heat production efficiency calculation unit 123. The heat production efficiency calculation unit 123 applies the cooling water temperature input from the cooling water temperature calculation unit 126 to equation 1 and calculates the heat production efficiency. Furthermore, if the turbo chiller is in operation, the heat production efficiency calculation unit 123 may acquire the measured value from the cooling water temperature sensor installed in the cooling tower and perform the calculation.

[0060] (Second coefficient calculation unit) As is clear from equation 4, the cooling water temperature is the sum obtained by multiplying the multipliers j, k, l, and m by the coefficient ajklm, from 0 to p, q, r, and s. The coefficient ajklm used in this calculation of the cooling water temperature corresponds to the second coefficient. The chilled water temperature [°C], ambient temperature [°C], ambient relative humidity [%] or ambient dew point temperature [°C] or ambient wet-bulb temperature [°C], and heat production [kW] are all values ​​that affect the cooling water temperature. The measured values ​​x1, x2, x3, and x4 change over time, but the coefficient ajklm in equation 4 is a fixed value. Therefore, because the coefficient ajklm is a fixed value, the cooling water temperature can be calculated based on the time-varying x1, x2, x3, and x4.

[0061] However, each measured value needs to be multiplied by a different coefficient, and the coefficient ajklm is required. The second coefficient calculation unit 127 is a calculation unit that calculates the second coefficient ajklm using the operation data of the heat source system S stored in the operation data storage unit 114. Since the second coefficient ajklm is a unique value for each operation pattern, the second coefficient calculation unit 127 calculates the coefficient ajklm for each operation pattern. Since the coefficient ajklm changes depending on the type of heat source H and the difference between the theoretical value and the actual measured value, in this embodiment it is calculated from past operation data that has actually been acquired. The operation data used to calculate the coefficient ajklm may be edited operation data, or theoretical values ​​provided by the manufacturer may be used as operation data. Past operation data, edited operation data, and theoretical values ​​are considered known operation data.

[0062] The second coefficient calculation unit 127 calculates the coefficient ajklm using the least squares method. Specifically, the sum of squared residuals S of equation 1 above is obtained using equation 5 below. (Math 5) TIFF2026123458000007.tif34159

[0063] Then, the second coefficient calculation unit 127 finds the coefficient ajklm by solving a system of equations in equation 6 below, where the partial derivative of the sum of squared residuals S with respect to ajklm is zero. (Math 6) TIFF2026123458000008.tif21159

[0064] The calculation of the coefficient ajklm by the second coefficient calculation unit 127 is preferably performed using past operating data or theoretical values ​​before the operation of the heat source system S. The second coefficient calculation unit 127 outputs the calculated coefficient ajklm to the cooling water temperature calculation unit 126. The cooling water temperature calculation unit 126 applies the coefficient ajklm input from the second coefficient calculation unit 127 to equation 4 and performs the calculation of the cooling water temperature.

[0065] (Second coefficient update section) The second coefficient update unit 128 is a calculation unit that recalculates the second coefficient, coefficient ajklm, using actual operating data up to a certain period of time after the start of operation of the heat source system S. The second coefficient update unit 128 may be configured to update the coefficient ajklm for each operating pattern, for example, every year. The second coefficient update unit 128 refers to the operating data storage unit 114, for example, the operating data for each operating pattern for the past year, and calculates the coefficient ajklm based on the above equations 5 and 6. The second coefficient update unit 128 outputs the calculated coefficient ajklm to the cooling water temperature calculation unit 126. The cooling water temperature calculation unit 126 updates equation 4 with the coefficient ajklm input from the second coefficient update unit 128 and performs subsequent calculations of the cooling water temperature.

[0066] (Driving pattern determination unit) The operation pattern determination unit 129 is a processing unit that determines the operation pattern to be controlled based on the heat production efficiency for each operation pattern calculated by the heat production efficiency calculation unit 123. The operation pattern determination unit 129 compares the heat production efficiency for each operation pattern and determines the operation pattern with the highest heat production efficiency for the air conditioning load calculated by the heat load calculation unit 121. Figure 3 shows an image diagram of the determination performed by the operation pattern determination unit 129. The operation pattern determination unit 129 is configured to output the determined operation pattern to the control condition determination unit 140.

[0067] (Elapsed time determination unit) The elapsed time determination unit 130 is a processing unit that determines whether the elapsed time exceeds a predetermined time when the heat production efficiency of the currently operating pattern falls below the heat production efficiency of other operating patterns. Based on the heat production efficiency for each operating pattern calculated by the heat production efficiency calculation unit 123, the elapsed time determination unit 130 determines whether the heat production efficiency of the currently operating pattern falls below the heat production efficiency of other operating patterns. If it does, the elapsed time determination unit 130 determines whether the heat production efficiency of the current operating pattern will continue to fall below the heat production efficiency of other operating patterns for, for example, 20 minutes. If the heat production efficiency of the currently operating pattern falls below the heat production efficiency of other operating patterns for more than 20 minutes, the elapsed time determination unit 130 outputs a command to the operating pattern determination unit 129 to output the operating pattern to be controlled to the control condition determination unit 140.

[0068] (Control condition determination unit) The control condition determination unit 140 is a processing unit that determines the conditions for controlling the heat source system S based on the operating pattern determined by the operating pattern determination unit 120. For example, let's explain the case where the current operating pattern is operating pattern 1 in Table 1 above, and the operating pattern determined by the operating pattern determination unit is operating pattern 2. The control condition determination unit 140 determines control conditions such that heat source H2 is started as part of the operation of operating pattern 1, while heat source H2 is started as part of the operation of operating pattern 2. Then, after, for example, 30 minutes have passed since heat source H2 was started in operating pattern 2, and the status of heat source H has been confirmed, the unit determines operating conditions such that heat source H1 in operating pattern 1 is stopped.

[0069] (Heat source control unit) The heat source control unit 150 is a processing unit that controls multiple heat sources H based on the control conditions determined by the control condition determination unit 140. The heat source control unit 150 outputs control signals to the multiple heat sources H based on the heat source conditions.

[0070] [1.2 Control] The control of the heat source system S will be explained using the flowcharts in Figures 4 to 6. Figure 4 is a flowchart showing an example of the processing procedure of the first coefficient calculation unit 124 performed before operating the heat source system S to which this embodiment is applied. Figure 5 is a flowchart showing an example of the processing procedure of the second coefficient calculation unit 127 performed before operating the heat source system S. Figure 6 is a flowchart showing an example of the processing procedure of the operation pattern determination unit 120 while the heat source system S is in operation.

[0071] (Coefficient settings before initial operation) Before starting and controlling the heat source system S, it is necessary to apply the first coefficient for each operating pattern calculated by the first coefficient calculation unit 124 to equation 1 used by the heat production efficiency calculation unit 123. Furthermore, if the heat source system S includes a turbo chiller as the heat source H, it is necessary to apply the second coefficient for each operating pattern calculated by the second coefficient calculation unit 127 to equation 4 used by the cooling water temperature calculation unit 126. Prior to calculating the first and second coefficients, heat source information is stored in the heat source information storage unit 111 and operating patterns are stored in the operating pattern storage unit 112.

[0072] Furthermore, the initial calculation of the coefficients by the first coefficient calculation unit 124 and the second coefficient calculation unit 127 does not necessarily have to be performed before starting the heat source system S. For example, the heat source system S can be operated for a certain period of time using an existing operating pattern to accumulate operating data and then the initial coefficients can be calculated. Also, as described above, the second coefficient is required when the heat source H includes a turbo chiller, so if the heat source H does not include a turbo chiller, the calculation process by the second coefficient calculation unit 127 is unnecessary.

[0073] As shown in Figure 4, the first coefficient calculation unit 124 reads known operating data for each operating pattern stored in the operating data storage unit 114 (step S01). Then, based on the read operating data, it calculates the first coefficient ajklm for each operating pattern, which is used to calculate the heat production efficiency, using equations 2 and 3 (step S02). The coefficient ajklm calculated by the first coefficient calculation unit 124 is output to the heat production efficiency calculation unit 123. Then, the heat production efficiency calculation unit 123 applies the coefficient ajklm input from the first coefficient calculation unit 124 to equation 1 for each operating pattern to complete the setting of the first coefficient (step S03).

[0074] If the calculation for all driving patterns is not yet complete (step S04, NO), the first coefficient calculation unit 124 increments the driving pattern (step S05), returns to step S01, and calculates the first coefficient for the next driving pattern. If the calculation of the first coefficient is completed for all driving patterns (step S04, YES), the setting process for the first coefficient is completed.

[0075] As shown in Figure 5, the second coefficient calculation unit 127 reads known operating data for each operating pattern stored in the operating data storage unit 114 (step S11). Based on the read operating data, it calculates the second coefficient ajklm for each operating pattern, which is used to calculate the cooling water temperature, using equations 5 and 6 (step S12). The coefficient ajklm calculated by the second coefficient calculation unit 127 is output to the cooling water temperature calculation unit. The cooling water temperature calculation unit then applies the coefficient ajklm input from the second coefficient calculation unit to equation 4 for each operating pattern to complete the setting of the second coefficient (step S13).

[0076] If the calculation for all driving patterns is not yet complete (step S14, NO), the second coefficient calculation unit 127 increments the driving pattern (step S15), returns to step S11, and calculates the second coefficient for the next driving pattern. If the calculation of the second coefficient is completed for all driving patterns (step S14, YES), the setting process for the first coefficient is completed.

[0077] (Determining the driving pattern) When the heat source system S is started, the heat production efficiency for each operating pattern is calculated in real time, and a process is performed to determine the operating pattern with the optimal heat production efficiency. As shown in Figure 6, the control unit 100 acquires values ​​from measurement sensors installed in the heat source system S, such as the supply chilled water temperature measured by the supply chilled water temperature sensor T1, the return chilled water temperature measured by the return chilled water temperature sensor T2, the outside air temperature and humidity measured by the outside air temperature and humidity sensor T3, and the flow rate measured by the flow meter F, and stores them in the acquired value storage unit 113 (step S21). Note that the measurement sensor values ​​are always acquired in real time and stored in the acquired value storage unit 113. The heat load calculation unit 121 calculates the heat load based on the measurement values ​​stored in the acquired value storage unit 113 (step S22). The heat production amount calculation unit 122 calculates the total heat production amount of the heat source system S based on the measurement values ​​stored in the acquired value storage unit 113 (step S23).

[0078] Next, the heat production efficiency calculation unit 123 uses the heat source system information to calculate the heat production efficiency of the heat source system S for each operating pattern (step S24). If the heat source system S includes a turbo chiller as the heat source H, the cooling water temperature calculation unit 126 uses the heat source system information to calculate the cooling water temperature for each operating pattern prior to calculating the heat production efficiency. The heat production efficiency calculation unit 123 calculates the heat production efficiency for each of the multiple operating patterns stored in the operating pattern storage unit 112. If the calculation has not been completed for all operating patterns (step S25, NO), the heat production efficiency calculation unit 123 increments the operating pattern (step S26), returns to step S24, and calculates the heat production efficiency for the next operating pattern.

[0079] If the calculation of heat production efficiency for all operating patterns is completed (step S25, YES), the operating pattern determination unit 129 compares the heat production efficiency for each operating pattern and determines the operating pattern with the highest heat production efficiency for the air conditioning load calculated by the heat load calculation unit (step S27). If the determined operating pattern is the first operating pattern determined after the heat source system S is started (step S28, YES), the control condition determination unit 140 determines the conditions for controlling the heat source system S based on the determined operating pattern, and the heat source control unit 150 performs control based on the control conditions (step S29).

[0080] After the operating pattern is switched, the process returns to step S21 and continues calculating the real-time heat production efficiency as long as the heat source system S continues to operate (step S30, NO). The calculation of the heat production efficiency continues until the heat source system S is stopped.

[0081] If the determined operating pattern is the second or later operating pattern determined after the start of the heat source system S (step S28, NO), the system determines whether the current operating pattern and the operating pattern determined by the operating pattern determination unit are the same (step S31). If they are the same operating patterns (step S31, YES), the system returns to step S21 and continues calculating the real-time heat production efficiency.

[0082] If the current operating pattern differs from the operating pattern determination unit (step S31, NO), the elapsed time determination unit 130 determines whether the elapsed time during which the heat production efficiency of the current operating pattern is lower than that of the other operating pattern is greater than or equal to a predetermined time (step S32). If the time during which the heat production efficiency of the determined operating pattern exceeds that of the current operating pattern is less than the predetermined time (step S32, NO), the operating pattern is not switched, and the process returns to step S21 to continue calculating the real-time heat production efficiency.

[0083] If the heat production efficiency of the determined operating pattern exceeds that of the current operating pattern for a predetermined time or longer (step S32, YES), the control condition determination unit 140 determines the conditions for controlling the heat source system S based on the determined operating pattern, and the heat source control unit 150 performs control based on the control conditions (step S29).

[0084] (Coefficient update) As the operation of the heat source system S continues, the heat production efficiency of the heat source H may change due to aging deterioration, etc. Therefore, it is preferable to update the first coefficient and the second coefficient every six months to one year. The first coefficient update unit 125 and the second coefficient update unit 128 refer to the operation data storage unit 114, for example, the operation data for each operation pattern for the past year, and recalculate the first coefficient and the second coefficient for each operation pattern, respectively.

[0085] The specific update process is the same as described above regarding the flowcharts in Figures 4 and 5. Once the update process is complete, the heat production efficiency calculation unit 123 updates equation 1 with the coefficient ajklm input from the first coefficient update unit 125 and performs subsequent calculations of heat production efficiency. The cooling water temperature calculation unit 126 updates equation 4 with the coefficient ajklm input from the second coefficient update unit 128 and performs subsequent calculations of cooling water temperature.

[0086] [1.5. Effects of the First Embodiment] The effects and benefits of the heat source system S of this embodiment are as follows.

[0087] (1) A control device for a heat source system S having multiple heat sources H, comprising: a heat source information storage unit 111 that stores heat source information for the multiple heat sources H; an operation pattern storage unit 112 that stores multiple operation patterns which determine combinations of heat sources H to be started and heat sources H to be stopped for the multiple heat sources H; a first coefficient calculation unit 124 that calculates a first coefficient for each operation pattern used to calculate the heat production efficiency for each of the multiple operation patterns based on the heat source system information; a heat production efficiency calculation unit 123 that calculates the heat production efficiency for each of the multiple operation patterns by applying the first coefficient for each operation pattern to the heat source system information; and an operation pattern determination unit 120 that determines the operation pattern which maximizes the heat production efficiency.

[0088] The control device for the heat source system S in this embodiment is configured to calculate a first coefficient for each operating pattern based on the heat source system information, and to calculate the heat production efficiency for each operating pattern by applying this first coefficient to the heat source system information. By determining the operating pattern that maximizes this heat production efficiency as the operating pattern for the heat source system S, it becomes possible to determine the optimal operating pattern in real time.

[0089] The heat source system information includes information on the heat source H, the operating environment, and the amount of heat produced. When the operating environment is the same, such as the chilled water temperature [°C], ambient temperature [°C], cooling water temperature [°C], and amount of heat produced [kW], the heat source H will have almost the same heat production efficiency, and therefore the calculation using the first coefficient is reproducible. Here, regarding the heat production efficiency ("amount of heat produced / power consumption", "amount of heat produced / CO2 emissions", "amount of heat produced / running cost"), it is preferable to determine the optimal operating pattern by calculating the heat production efficiency for all operating patterns, as in the control device of the heat source system S in this embodiment.

[0090] When measuring heat production efficiency, it is possible to measure the heat production efficiency of an operating heat source H, but it is not possible to obtain measurement values ​​for a stopped heat source H. Therefore, the configuration of the heat production efficiency calculation unit 123 makes it possible to calculate the heat production efficiency of both an operating and a stopped heat source H if they were operating under the current conditions. Thus, the control device of the heat source system S can select the most efficient operating pattern from all operating patterns. Furthermore, the control device of the heat source system S can perform calculations of heat production efficiency in real time in response to changes in heat source system information and select an appropriate operating pattern. As a result, it is possible to provide a control device, control program, and heat source system that can maximize performance indicators.

[0091] The control device for the heat source system S can be configured without using special sensors or AI, and can be implemented, for example, using a general-purpose PLC (control) + general-purpose PC (recording + HIM). Therefore, even when the control device for the heat source system S of this embodiment is applied to an existing heat source system, it is possible to control the operating efficiency based on the values ​​acquired by the measurement sensors. Thus, it is possible to provide a control device, control program, and heat source system that are cost-effective and require less effort to introduce a new system.

[0092] (2) At least one of the multiple heat sources H is an air-cooled chiller, and the heat source system information includes chilled water temperature, ambient air temperature, and heat production quantity, and the heat production efficiency calculation unit 123 is configured to calculate the heat production efficiency of the air-cooled chiller by multiplying the variables chilled water temperature, ambient air temperature, and heat production quantity by the first coefficient for each operating pattern.

[0093] If the heat source H includes an air-cooled chiller, the heat source system information includes the chilled water temperature, ambient air temperature, and the amount of heat produced. Based on this heat source system information, a first coefficient is determined, and the heat production efficiency calculation unit 123 calculates the heat production efficiency of the air-cooled chiller in real time by multiplying the variables of chilled water temperature, ambient air temperature, and the amount of heat produced by the first coefficient for each operating pattern.

[0094] (3) At least one of the multiple heat sources H is a turbo chiller, and the heat source system information includes chilled water temperature, cooling water temperature, and heat production quantity, and the heat production efficiency calculation unit 123 is configured to calculate the heat production efficiency of the turbo chiller by multiplying the variables chilled water temperature, cooling water temperature, and heat production quantity by the first coefficient for each operating pattern.

[0095] If the heat source H includes a turbo chiller, the heat source system information includes chilled water temperature, cooling water temperature, and heat production quantity. Based on this heat source system information, a first coefficient is determined, and the heat production efficiency calculation unit 123 calculates the heat production efficiency of the turbo chiller in real time by multiplying the variables chilled water temperature, cooling water temperature, and heat production quantity by the first coefficient for each operating pattern.

[0096] (4) The multiple heat sources H include an air-cooled chiller and a turbo chiller, and the heat source system information includes chilled water temperature, ambient air temperature, cooling water temperature, and heat production quantity. The heat production efficiency calculation unit 123 is configured to calculate the heat production efficiency of the air-cooled chiller by multiplying the variables chilled water temperature, ambient air temperature, and heat production quantity by a first coefficient for each operating pattern, and to calculate the heat production efficiency of the turbo chiller by multiplying the variables chilled water temperature, cooling water temperature, and heat production quantity by a first coefficient for each operating pattern.

[0097] If the heat source H includes an air-cooled chiller and a turbo chiller, the heat source system information includes chilled water temperature, ambient air temperature, cooling water temperature, and heat production quantity. Based on this heat source system information, a first coefficient is determined, and the heat production efficiency calculation unit 123 calculates the heat production efficiency of the air-cooled chiller and turbo chiller in real time by multiplying the variables chilled water temperature, ambient air temperature, cooling water temperature, and heat production quantity by the first coefficient for each operating pattern.

[0098] (5) The system further includes a second coefficient calculation unit 127 that calculates a second coefficient for each of the multiple operating patterns used to calculate the cooling water temperature based on the heat source system information, and a cooling water temperature calculation unit 126 that calculates the cooling water temperature by applying the second coefficient for each of the multiple operating patterns to the heat source system information.

[0099] The control device of the heat source system S can also calculate the cooling water temperature using calculations. If the heat source H has a stopped turbo chiller, even if a cooling water temperature sensor is installed, it is not possible to measure the cooling water temperature when the turbo chiller is running. The configuration of the cooling water temperature calculation unit 126 makes it possible to calculate the cooling water temperature when the system is operating under the current conditions, based on the heat source system information. By applying the cooling water temperature calculated by the cooling water temperature calculation unit 126 to the heat production efficiency calculation unit 123, it becomes possible to calculate the heat production efficiency when the system is operating under the current conditions, for both the heat source H that is operating and the heat source H that is stopped, even if the heat source H includes a turbo chiller.

[0100] (6) At least one of the multiple heat sources H is a hot water heat source, and the heat source system information includes hot water temperature, ambient temperature, and heat production quantity, and the heat production efficiency calculation unit 123 is configured to calculate the heat production efficiency of the hot water heat source by multiplying the variables of hot water temperature, ambient temperature, and heat production quantity by a first coefficient for each operating pattern.

[0101] If the heat source H includes a hot water heat source, the heat source system information includes the hot water temperature, ambient temperature, and the amount of heat produced. Based on this heat source system information, a first coefficient is determined, and the heat production efficiency calculation unit 123 calculates the heat production efficiency of the hot water heat source in real time by multiplying the variables of hot water temperature, ambient temperature, and the amount of heat produced by the first coefficient for each operating pattern.

[0102] (7) The heat source information includes the number of heat sources H included in the heat source system S, the number of heat sources H is the heat source system information, and the heat production efficiency calculation unit 123 is configured to calculate the heat production efficiency using the number of heat sources H as a variable.

[0103] The heat production efficiency is affected by the number of heat sources H included in the heat source system S. Therefore, by adding the number of heat sources H as a variable to the calculation of the heat production efficiency, it becomes possible to calculate a more accurate heat production efficiency.

[0104] (8) The system further includes an operation data storage unit 114 that stores operation data for each operation pattern, the operation data includes known operation data, and the first coefficient calculation unit 124 is configured to calculate a first coefficient for each operation pattern based on the heat source system information included in the known operation data.

[0105] By calculating a first coefficient based on known operating data, the first coefficient can be calculated from the operating data accumulated during the initial operation of the heat source system S. By calculating a first coefficient based on known operating data, it becomes possible to calculate the heat production efficiency from the start of operation of the heat source system S.

[0106] (9) The system further includes an operation data storage unit 114 that stores operation data for each operation pattern, the operation data includes known operation data, and the second coefficient calculation unit 127 is configured to calculate a second coefficient for each operation pattern based on the heat source system information included in the known operation data.

[0107] By calculating a second coefficient based on known operating data, the second coefficient can be calculated from the operating data accumulated during the initial operation of the heat source system S. By calculating a second coefficient based on known operating data, it becomes possible to calculate the cooling water temperature from the start of operation of the heat source system S.

[0108] [2. Other Embodiments] In the above embodiment, the case where the heat source H is an air-cooled chiller and a turbo chiller was described as a specific example. However, the control device of the heat source system S in this embodiment is also applicable to a heat source that produces hot water. When calculating the heat production efficiency for a heat source H that produces hot water, the chilled water in the above embodiment is replaced with hot water in the calculation. [Explanation of Symbols]

[0109] S: Heat source system H: Heat source L: Load side P1: Cooling water header pipe P2: Recirculating water header pipe P3: Bypass pipe T1: Cooling water temperature sensor T2: Return cooling water temperature sensor T3: Outdoor temperature and humidity sensor F:Flowmeter 100: Control Unit 110: Storage section 111:Heat source information storage unit 112: Driving pattern memory unit 113: Acquired value storage unit 114: Operation data storage unit 120: Driving pattern determination unit 121: Heat load calculation section 122: Manufacturing heat amount calculation section 123: Thermal Manufacturing Efficiency Calculation Unit 124: First coefficient calculation unit 125: First coefficient update section 126: Cooling water temperature calculation section 127: Second coefficient calculation unit 128: Second coefficient update section 129: Driving pattern determination unit 130: Elapsed time determination unit 140: Control condition determination unit 150: Heat source control unit I: Input section O: Output section

Claims

1. A control device for a heat source system having multiple heat sources, A heat source information storage unit that stores heat source information for the aforementioned multiple heat sources, The operation pattern storage unit stores multiple operation patterns that determine combinations of heat sources to be started and heat sources to be stopped for the aforementioned multiple heat sources, For each of the aforementioned plurality of operating patterns, a first coefficient calculation unit calculates a first coefficient for each operating pattern used to calculate the heat production efficiency based on the heat source system information, A heat production efficiency calculation unit calculates the heat production efficiency by applying the first coefficient for each of the above operating patterns to the heat source system information for each of the above operating patterns, An operating pattern determination unit that determines the operating pattern that maximizes the heat production efficiency, A control device for a heat source system.

2. At least one of the aforementioned multiple heat sources is an air-cooled chiller. The heat source system information includes chilled water temperature, ambient air temperature, and heat quantity produced. The control device for a heat source system according to claim 1, wherein the heat production efficiency calculation unit is configured to calculate the heat production efficiency of the air-cooled chiller by multiplying the variables of the chilled water temperature, the ambient air temperature, and the amount of heat produced by the first coefficient for each operating pattern.

3. At least one of the aforementioned multiple heat sources is a turbo chiller, The heat source system information includes chilled water temperature, cooling water temperature, and heat quantity produced. The control device for a heat source system according to claim 1, wherein the heat production efficiency calculation unit is configured to calculate the heat production efficiency of the turbo chiller by multiplying the variables of the chilled water temperature, the cooling water temperature, and the amount of heat produced by the first coefficient for each operating pattern.

4. The aforementioned multiple heat sources include an air-cooled chiller and a turbo chiller. The heat source system information includes chilled water temperature, ambient air temperature, cooling water temperature, and heat quantity produced. The control device for a heat source system according to claim 1, wherein the heat production efficiency calculation unit is configured to calculate the heat production efficiency of the air-cooled chiller by multiplying the variables of chilled water temperature, ambient air temperature, and heat production amount by the first coefficient for each operating pattern, and to calculate the heat production efficiency of the turbo chiller by multiplying the variables of chilled water temperature, cooling water temperature, and heat production amount by the first coefficient for each operating pattern.

5. A second coefficient calculation unit calculates a second coefficient for each of the above-mentioned operating patterns, based on the heat source system information, which is used to calculate the cooling water temperature, for each of the above-mentioned multiple operating patterns. A control device for a heat source system according to claim 3 or 4, further comprising: a cooling water temperature calculation unit that calculates the cooling water temperature by applying the second coefficient for each of the plurality of operating patterns to the heat source system information for each of the plurality of operating patterns.

6. At least one of the aforementioned multiple heat sources is a hot water heat source, The heat source system information includes hot water temperature, ambient air temperature, and heat output. The control device for a heat source system according to claim 1, wherein the heat production efficiency calculation unit is configured to calculate the heat production efficiency of the hot water heat source by multiplying the variables of the hot water temperature, the ambient air temperature, and the amount of heat produced by the first coefficient for each operating pattern.

7. The heat source information includes the number of heat sources included in the heat source system. The number of heat sources is the heat source system information, The control device for a heat source system according to claim 2 or 3, wherein the heat production efficiency calculation unit is further configured to calculate the heat production efficiency using the number of heat sources as a variable.

8. The system further includes an operation data storage unit that stores operation data for each of the aforementioned operation patterns, The aforementioned operating data includes known operating data, The control device for a heat source system according to claim 1 or 2, wherein the first coefficient calculation unit is configured to calculate the first coefficient for each operating pattern based on the heat source system information included in the known operating data.

9. The system further includes an operation data storage unit that stores operation data for each of the aforementioned operation patterns, The aforementioned operating data includes known operating data, The control device for a heat source system according to claim 5, wherein the second coefficient calculation unit is configured to calculate the second coefficient for each operating pattern based on the heat source system information included in the known operating data.

10. A control program for a heat source system having multiple heat sources, In a computer or electronic circuit, A heat source information storage step that stores heat source information for the plurality of heat sources, A step of storing multiple operating patterns which determine combinations of heat sources to be started and heat sources to be stopped for the aforementioned multiple heat sources, For each of the aforementioned plurality of operating patterns, a first coefficient calculation step is performed to calculate a first coefficient for each operating pattern used to calculate the heat production efficiency based on the heat source system information, A heat production efficiency calculation step in which, for each of the plurality of operating patterns, the first coefficient for each operating pattern is applied to the heat source system information to calculate the heat production efficiency, A step of determining the operating pattern that maximizes the heat production efficiency, A control program for a heat source system that executes the process.

11. A heat source system comprising a plurality of heat sources and a control unit for controlling the plurality of heat sources, The control unit, A heat source information storage unit that stores heat source information for the aforementioned multiple heat sources, The operation pattern storage unit stores multiple operation patterns that determine combinations of heat sources to be started and heat sources to be stopped for the aforementioned multiple heat sources, For each of the aforementioned plurality of operating patterns, a first coefficient calculation unit calculates a first coefficient for each operating pattern used to calculate the heat production efficiency based on the heat source system information, A heat production efficiency calculation unit calculates the heat production efficiency by applying the first coefficient for each of the above operating patterns to the heat source system information for each of the above operating patterns, An operating pattern determination unit that determines the operating pattern that maximizes the heat production efficiency, A heat source system having

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