JP6476818B2 - Heat demand estimation device, heat demand estimation method, equipment control device, equipment control method, equipment control system, control program, and recording medium - Google Patents

Description

  The present invention relates to a heat demand estimation device and a heat demand estimation method for estimating a heat demand of an air conditioning facility, a facility control device, a facility control method and a facility control for controlling an air conditioning facility based on the heat demand estimated by the heat demand estimation device. The present invention relates to a system, a control program, and a recording medium.

  In recent years, from the viewpoints of prevention of global warming, cost reduction, request of revised energy saving law, etc., energy saving of various facilities (especially air conditioning equipment) installed in buildings such as offices, factories and houses has been promoted. Here, there are roughly two methods for energy saving. The method is to first control the operation of various facilities so that the minimum necessary energy is supplied, and secondly, to ensure that the necessary energy is supplied efficiently. It is to control the operation.

  As a means to realize these energy-saving methods, it is based on a management system that visualizes the energy consumption of the entire building, such as BEMS (Building Energy Management System), and constant measurement of power and environmental data (temperature and humidity, etc.) of air conditioning equipment There are air conditioning equipment automatic control systems.

  For example, as the second energy saving technique, Patent Document 1 calculates the amount of heat by multiplying the temperature difference between the outgoing water and the return water supplied to the air conditioner by the flow rate, and based on the calculated amount of heat. A method for controlling increase / decrease in the number of operating refrigerators is described.

JP 2011-21855 A (published February 3, 2011)

  However, in the conventional technology as described above, it is necessary to install a temperature sensor and a flow rate sensor in each device of the air conditioning equipment in order to calculate the heat demand of the air conditioning equipment (the amount of heat necessary for the air conditioner). However, the flow rate sensor has the following problems. First, the flow sensor is very expensive compared to other sensors such as temperature sensors. Secondly, it takes a lot of time to install the flow sensor (especially, when installing in existing air conditioning equipment, the air conditioning equipment must be stopped). Thirdly, the measurement error due to the installation error of the flow sensor is very large. Fourth, the flow rate sensor requires regular maintenance in order to maintain measurement accuracy.

  Therefore, even if energy saving is performed by applying the above-described conventional technology, there are cases where high cost-effectiveness cannot be obtained. In addition, the conventional technology may not be practically applied to existing air conditioning equipment.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to estimate a heat demand of an air conditioning facility without installing a flow rate sensor, a heat demand estimation method, and a facility control device. It is to realize an equipment control method, an equipment control system, a control program, and a recording medium.

  In order to solve the above-described problem, a heat demand estimation device according to the present invention is a heat demand estimation device that estimates the heat demand of an air conditioning facility equipped with a heat exchanger, and measures the power consumption of the heat exchanger. An acquisition unit that acquires heat exchanger power data from the heat exchanger, and an estimated heat demand calculation that calculates an estimated heat demand that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquisition unit And an output unit that outputs the estimated heat demand calculated by the estimated heat demand calculation unit.

  According to the said structure, the said heat demand estimation apparatus can estimate the heat demand of the said air conditioning equipment only from the power consumption of the said heat exchanger. That is, the heat demand estimation device has an effect that the heat demand of the air conditioning equipment can be estimated without installing a flow sensor in the air conditioning equipment.

  In the heat demand estimation device according to the present invention, the acquisition unit further acquires fluid return temperature data from a sensor that measures a return temperature of the fluid supplied by the heat exchanger, and the fluid return temperature data acquired by the acquisition unit is Based on the return temperature of the fluid shown, the forward temperature of the fluid and the flow rate of the fluid set in advance in the air conditioning equipment, an effective heat demand that is the actual value of the heat demand at the time of learning is calculated An effective heat demand calculation unit, a function representing the relationship between the effective heat demand calculated by the effective heat demand calculation unit and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquisition unit is derived. A function derivation unit, wherein the estimated heat demand calculation unit uses the function derived by the function derivation unit to calculate the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquisition unit. Teinetsu demand may be calculated.

  According to the above configuration, the forward temperature of the fluid and the flow rate of the fluid are preset in the air-conditioning equipment, and the effective heat demand calculation unit calculates the preset forward temperature of the fluid and the fluid. The effective heat demand is calculated based on the flow rate and the return temperature of the fluid measured by the sensor. The estimated heat demand calculation unit calculates the estimated heat demand using the function derived from the effective heat demand by the function deriving unit. By calculating the estimated heat demand using the function, the estimation error of the estimated heat demand can be kept low. Therefore, the said heat demand estimation apparatus can estimate the heat demand of an air conditioning equipment with high precision.

  In the heat demand estimation device according to the present invention, the estimated heat demand calculation unit multiplies the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquisition unit by a predetermined heat exchanger efficiency. The estimated heat demand may be calculated.

  For example, the estimated heat demand calculator calculates a value obtained by multiplying the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit by a predetermined heat exchanger efficiency as the estimated heat demand. It may be calculated. Further, for example, the estimated heat demand calculation unit multiplies the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquisition unit by a predetermined heat exchanger efficiency, and the multiplication value is a constant. May be calculated as the estimated heat demand.

  In the heat demand estimation apparatus according to the present invention, the acquisition unit measures fluid return temperature data from a sensor that measures a return temperature of a fluid supplied by the heat exchanger, and power consumption of a fluid pump that circulates the fluid. A flow rate estimation unit that further acquires fluid pump power data from the sensor and estimates a flow rate of the fluid based on power consumption of the fluid pump indicated by the fluid pump power data acquired by the acquisition unit, and a fluid acquired by the acquisition unit Based on the return temperature of the fluid indicated by the return temperature data, the forward temperature of the fluid preset in the air conditioning equipment, and the flow rate of the fluid estimated by the flow rate estimation unit, the actual heat at the time of learning An effective heat demand calculation unit that calculates an effective heat demand that is a demand value, an effective heat demand calculated by the effective heat demand calculation unit, and a heat exchange acquired by the acquisition unit A function derivation unit for deriving a function representing a relationship with the power consumption of the heat exchanger indicated by the power data, and the estimated heat demand calculation unit uses the function derived by the function derivation unit to obtain the acquisition The estimated heat demand may be calculated from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the unit.

  According to the above configuration, the effective heat demand calculation unit calculates the effective heat demand based on the flow rate estimated by the flow rate estimation unit from the power consumption of the fluid pump. Therefore, at the time of learning, the effective heat demand can be calculated with high accuracy without fixing the set flow rate of the fluid pump.

  In the heat demand estimation device according to the present invention, the acquisition unit measures fluid return temperature data from a sensor that measures a return temperature of the fluid supplied by the heat exchanger, and a forward temperature of the fluid supplied by the heat exchanger. Further, fluid return temperature data is acquired from the sensor, and the difference between the return temperature of the fluid indicated by the fluid return temperature data acquired by the acquisition unit and the forward temperature of the fluid indicated by the fluid return temperature data acquired by the acquisition unit A flow rate estimating unit that estimates the flow rate of the fluid based on the fluid return temperature difference, the fluid return temperature indicated by the fluid return temperature data acquired by the acquisition unit, and the fluid output acquired by the acquisition unit. The effective heat demand that calculates the effective heat demand that is the actual value of the heat demand at the time of learning based on the fluid forward temperature indicated by the temperature data and the fluid flow rate estimated by the flow rate estimation unit A calculation unit, a function derivation unit for deriving a function representing a relationship between the effective heat demand calculated by the effective heat demand calculation unit and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquisition unit; The estimated heat demand calculating unit uses the function derived by the function deriving unit to calculate the estimated heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit. It may be calculated.

  According to the above configuration, the effective heat demand calculation unit calculates the effective heat demand based on the flow rate estimated by the flow rate estimation unit from the return temperature difference of the fluid. Therefore, at the time of learning, the effective heat demand can be calculated with high accuracy without fixing the set flow rate of the fluid pump.

  In the heat demand estimation apparatus according to the present invention, the output unit may cause the display unit to display the estimated heat demand calculated by the estimated heat demand calculation unit.

  According to the above configuration, the heat demand estimation device can notify the user of the calculated estimated heat demand.

  The facility control device according to the present invention may include a control unit that controls the air conditioning facility based on the estimated heat demand estimated by the heat demand estimation device.

  According to said structure, the said control part controls the said air conditioning equipment based on the estimated heat demand estimated without using a flow sensor. Therefore, the equipment control device can control the air conditioning equipment with an inexpensive configuration. Moreover, the said equipment control apparatus can be easily applied to the existing air conditioning equipment.

  In the equipment control device according to the present invention, the control unit determines the number of operating heat exchangers based on the estimated heat demand estimated by the heat demand estimation device and the rated heat amount per one heat exchanger. May be.

  In the equipment control apparatus according to the present invention, the control unit refers to optimum fluid advance temperature information indicating an optimum fluid advance temperature with respect to the heat demand, and is optimal for the estimated heat demand estimated by the heat demand estimation device. The fluid forward temperature may be set as a set temperature of the fluid supplied by the heat exchanger.

  The facility control system according to the present invention may include the heat demand estimation device, the facility control device, and a sensor that measures power consumption of the heat exchanger.

  According to the said structure, there exists an effect similar to the said heat demand estimation apparatus and the said equipment control apparatus.

  In order to solve the above problems, a heat demand estimation method according to the present invention is a heat demand estimation method for estimating the heat demand of an air conditioner equipped with a heat exchanger, and measures the power consumption of the heat exchanger. An acquisition step of acquiring heat exchanger power data from the heat exchanger, and an estimated heat demand amount that calculates an estimated heat demand amount that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquisition step A calculation step; and an output step of outputting the estimated heat demand calculated in the estimated heat demand calculation step.

  According to the said structure, there exists an effect similar to the said heat demand estimation apparatus.

  The facility control method according to the present invention is a facility control method for controlling an air conditioning facility, and may include a control step of controlling the air conditioning facility based on the estimated heat demand estimated by the heat demand estimation method. .

  According to the said structure, there exists an effect similar to the said equipment control apparatus.

  The heat demand estimation device and the equipment control device according to each aspect of the present invention may be realized by a computer. In this case, the computer is operated as each unit included in the heat demand estimation device or the equipment control device. The control program for the heat demand estimation device or the equipment control device that realizes the heat demand estimation device or the equipment control device by a computer, and a computer-readable recording medium that records the control program also fall within the scope of the present invention.

  The present invention has an effect of being able to estimate the heat demand of an air conditioning facility without installing a flow sensor in the air conditioning facility.

It is a block diagram which shows the principal part structure of the control apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows an example of a structure of the equipment control system which concerns on the said Embodiment 1. FIG. It is a figure which shows an example of a structure of the air conditioning equipment provided with a cooling function. 3 is a flowchart illustrating an example of a control process executed by the control device according to the first embodiment. It is the graph which plotted the actual heat demand of the air-conditioning equipment computed using the prior art. It is the graph which plotted the estimated heat demand of the air-conditioning equipment which the control apparatus which concerns on the said Embodiment 1 estimated. It is a block diagram which shows an example of a structure of the equipment control system which concerns on Embodiment 2 of this invention. It is a block diagram which shows an example of the principal part structure of the control apparatus which concerns on the said Embodiment 2. It is a figure which shows the correspondence of the actual heat demand of an air conditioner, and the power consumption of a refrigerator. It is a flowchart which shows an example of the learning process of the control apparatus which concerns on the said Embodiment 2. FIG. It is the graph which plotted the estimated heat demand of the air-conditioning equipment which the control apparatus which concerns on the said Embodiment 2 estimated. It is a block diagram which shows an example of a structure of the equipment control system which concerns on Embodiment 3 of this invention. It is a block diagram which shows an example of a principal part structure of the control apparatus which concerns on the said Embodiment 3. It is a flowchart which shows an example of the learning process of the control apparatus which concerns on the said Embodiment 3. It is a block diagram which shows an example of a principal part structure of the control apparatus which concerns on Embodiment 4 of this invention. It is a block diagram which shows an example of a principal part structure of the control apparatus which concerns on Embodiment 5 of this invention. It is a block diagram which shows an example of a structure of the equipment control system which concerns on Embodiment 6 of this invention. It is a figure which shows the correspondence of a cold water return temperature difference and the inverter frequency of a cold water pump. It is a block diagram which shows an example of a principal part structure of the control apparatus which concerns on Embodiment 6 of this invention.

<Embodiment 1>
An embodiment (Embodiment 1) of the present invention will be described below with reference to FIGS.

[Outline of equipment control system]
First, the outline | summary of the equipment control system which concerns on this embodiment is demonstrated based on FIG. FIG. 2 is a block diagram illustrating an example of the configuration of the facility control system 9 according to the first embodiment.

  As shown in FIG. 2, the equipment control system 9 includes a control device (heat demand estimation device, equipment control device) 1, a control relay 2, an air conditioning equipment 4, and a refrigerator power sensor 5.

(Control device)
The control device 1 estimates the heat demand of the air conditioning equipment 4 based on the data acquired from the refrigerator power sensor 5, and controls the air conditioning equipment 4 based on the estimated heat demand. Specifically, the control device 1 transmits a control signal to each device of the air conditioning equipment 4 via the control repeater 2 to control each device of the air conditioning equipment 4.

(Control repeater)
The control repeater 2 receives the control signal output from the control device 1, converts the received control signal into a signal suitable for each device of the air conditioning equipment 4, and transmits the converted control signal to the device. The control repeater 2 is, for example, a PLC (Programmable logic controller).

(Air conditioning equipment)
The air conditioning equipment 4 is equipment for adjusting the temperature and humidity of a predetermined space. The structure of the air-conditioning equipment 4 which concerns on this embodiment is demonstrated based on FIG. FIG. 3 is a diagram illustrating an example of a configuration of the air conditioning equipment 4 having a cooling function.

  As shown in FIG. 3, the air conditioning equipment 4 includes a cooling tower 41, a cooling water pump 42, a refrigerator 43, a cold water pump 44, and an air conditioner 45. The cooling tower 41 stores cooling water. The cooling water pump 42 supplies cooling water stored in the cooling tower 41 to the refrigerator 43. The refrigerator 43 is a heat exchanger that adjusts the temperature of the cold water using the cooling water. The cold water pump 44 adjusts the flow rate of cold water supplied from the refrigerator 43 to the air conditioner 45. The air conditioner 45 uses the cold water supplied by the cold water pump 44 to cool the outside air taken in from the outside and / or the inside air circulating inside to generate cold air, and the generated cold air is put into a predetermined space. To supply.

  The temperature of the cold water supplied from the refrigerator 43 to the air conditioner 45 is referred to as a cold water feed temperature. Since the refrigerator 43 adjusts and supplies the temperature of the cold water to the set temperature, the cold water going temperature is usually the same temperature as the temperature (set temperature) set in the refrigerator 43. Moreover, the temperature of the cold water which returns to the refrigerator 43 from the air conditioner 45 is called cold water return temperature. The flow rate of cold water supplied from the refrigerator 43 to the air conditioner 45 is referred to as a cold water flow rate. In order to adjust the flow rate of the chilled water supplied from the refrigerator 43 to the air conditioner 45 by the chilled water pump 44, the chilled water flow rate is normally the same as the flow rate (set flow rate) set in the chilled water pump 44.

  In the present embodiment, the refrigerator 43 is a refrigerator having a characteristic that the refrigerator efficiency (COP: Coefficient Of Performance) of the refrigerator monotonously increases with respect to the load of the refrigerator. For example, the refrigerator 43 is a refrigerant compression refrigerator such as a turbo refrigerator or a screw refrigerator. That is, the refrigerator 43 according to the present embodiment is more efficient at high load than at low load. Therefore, when supplying a predetermined amount of heat as the entire refrigerator 43, it is better to operate the refrigerator 43 with as few units as possible (to maximize the load per unit of the refrigerator 43), Increases efficiency. The refrigerator efficiency (heat exchanger efficiency) of the refrigerator 43 is a so-called coefficient of performance or operation coefficient. Generally, “the amount of heat that the refrigerator 43 moves from the cold water to the cooling water” is expressed as “the efficiency of the refrigerator 43. It is obtained by dividing by “power consumption”.

  In the example shown in FIG. 3, the air conditioning equipment 4 includes five cooling towers 41, four cooling water pumps 42, three refrigerators 43, four cold water pumps 44, and eight air conditioners 45. It is not limited to. The air-conditioning equipment 4 should just be provided with the cooling tower 41, the cooling water pump 42, the refrigerator 43, the cold water pump 44, and the air conditioner 45, respectively.

  Moreover, although the air-conditioning equipment provided with the cooling function is illustrated in FIG. 3, the air-conditioning equipment provided with the heating function or the air-conditioning equipment provided with the air-conditioning function may be used.

  In other words, the cooling tower 41 is a medium reservoir that stores a heat exchange medium for depriving the amount of heat from the fluid supplied by the refrigerator 43 or giving the amount of heat to the fluid. The cooling water pump 42 is a medium pump that supplies the heat exchange medium stored in the cooling tower 41 to the refrigerator 43. The refrigerator 43 is a heat exchanger that adjusts the temperature of the fluid supplied to the air conditioner 45 using the heat exchange medium supplied from the cooling tower 41. The cold water pump 44 is a fluid pump that adjusts the flow rate of the fluid supplied from the refrigerator 43 to the air conditioner 45. The air conditioner 45 uses the fluid supplied by the cold water pump 44 to adjust the temperature of the outside air taken in from the outside and / or the inside air circulating inside, and the adjusted outside air and / or inside air in a predetermined space. To supply.

(Refrigerator power sensor)
The refrigerator power sensor 5 is a sensor that measures the power consumption of the refrigerator 43 of the air conditioning equipment 4. When the air conditioning equipment 4 includes a plurality of refrigerators 43, the refrigerator power sensor 5 measures the power consumption of each of the plurality of refrigerators 43. The refrigerator power sensor 5 transmits refrigerator power data (heat exchanger power data) indicating the measured power consumption of the refrigerator 43 to the control device 1.

  Note that the equipment control system 9 may not include the control repeater 2. In this case, the control device 1 transmits a control signal directly to each device of the air conditioning equipment 4 without using the control repeater 2.

  Moreover, in the example shown in FIG. 2, although the equipment control system 9 is provided with the one control apparatus 1 and the one air conditioning equipment 4, it does not restrict to this. The facility control system 9 may include a plurality of control devices 1 or a plurality of air conditioning facilities 4.

[Configuration of control device]
Next, the configuration of the control device 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram illustrating an example of a main configuration of a control device 1 according to the first embodiment. As shown in FIG. 1, the control device 1 includes a control unit 11, a storage unit 12, a communication unit 13, a display unit 14, and an operation unit 15.

(Communication Department)
The communication unit 13 communicates with other devices such as the air conditioning equipment 4 and the refrigerator power sensor 5 by wireless communication means or wired communication means, and exchanges data according to instructions from the control unit 11. For example, the communication unit 13 acquires refrigerator power data from the refrigerator power sensor 5 in accordance with an instruction from the control unit 11. In addition, the communication unit 13 transmits a control signal to the control repeater 2 in accordance with an instruction from the control unit 11.

(Display section)
The display unit 14 displays an image in accordance with an instruction from the control unit 11. The display unit 14 may be any unit that displays an image in accordance with an instruction from the control unit 11. For example, an LCD (liquid crystal display), an organic EL display, or the like can be applied. In the example illustrated in FIG. 1, the control device 1 includes the display unit 14. However, the present invention is not limited to this, and the control device 1 and the display unit 14 may be separate. That is, a display device separate from the control device 1 may display an image in accordance with an instruction from the control device 1.

(Operation section)
The operation unit 15 is for a user to input an instruction signal to the control device 1 and operate the control device 1. The operation unit 15 may be configured with input devices such as a keyboard, a mouse, a keypad, and operation buttons. Further, a touch panel in which the operation unit 15 and the display unit 14 are integrated may be used. The operation unit 15 may be a remote control device such as a remote controller that is separate from the control device 1.

(Control part)
The control unit 11 performs various calculations by executing a program read from the storage unit 12 to a temporary storage unit (not shown), and comprehensively controls each unit included in the control device 1. .

  In the present embodiment, the control unit 11 includes, as functional blocks, a data collection unit (acquisition unit) 21, an estimated heat demand calculation unit (output unit) 22, a display control unit (output unit) 23, and an equipment control unit (control unit). ) 24 and the input analysis unit 25. Each functional block of the control unit 11 is realized by a CPU (central processing unit), a program stored in a storage device realized by a ROM (read only memory) or the like, by a RAM (random access memory) or the like. This can be realized by reading out to the temporary storage unit and executing it.

(Data collection part)
The data collection unit 21 collects sensor data transmitted from sensors installed in each device of the air conditioning equipment 4. Specifically, the data collection unit 21 receives refrigerator power data from the refrigerator power sensor 5 installed in the refrigerator 43 of the air conditioning equipment 4. The data collection unit 21 outputs the received refrigerator power data to the estimated heat demand calculation unit 22.

(Estimated heat demand calculator)
The estimated heat demand calculation unit 22 estimates the heat demand of the air conditioning equipment 4. Specifically, the estimated heat demand calculation unit 22 receives the refrigerator power data from the data collection unit 21 and reads the conversion function 31 from the storage unit 12. And the estimated heat demand calculation part 22 calculates the estimated value (estimated heat demand) of heat demand based on the power consumption of the refrigerator 43 which the received refrigerator power data shows, and the read conversion function 31. calculate. The estimated heat demand calculation unit 22 outputs the calculated estimated heat demand to the display control unit 23 and the facility control unit 24. In other words, the estimated heat demand calculator 22 calculates the estimated heat demand from the power consumption of the refrigerator 43 indicated by the refrigerator power data.

  Here, the conversion function 31 is a function for estimating the heat demand of the air conditioning equipment 4 from the power consumption of the refrigerator 43. For example, the estimated heat demand calculation unit 22 uses the rated value of the refrigerator efficiency (COP) of the refrigerator 43 as the coefficient a of the conversion function 31 (f (x) = ax). In this case, the estimated heat demand calculation unit 22 calculates the estimated heat demand by multiplying the power consumption of the refrigerator 43 by the rated value of the refrigerator efficiency.

(Display control unit)
The display control unit 23 displays an image or characters on the display unit 14. Specifically, the display control unit 23 receives the estimated heat demand from the estimated heat demand calculation unit 22 and causes the display unit 14 to display the received estimated heat demand.

(Equipment control unit)
The facility control unit 24 controls each device of the air conditioning facility 4. Specifically, the facility control unit 24 receives the estimated heat demand from the estimated heat demand calculation unit 22, determines the control content for each device of the air conditioning facility 4 based on the received estimated heat demand, and determines A control signal indicating the control content is transmitted to the control repeater 2 via the communication unit 13.

  For example, the facility control unit 24 may determine the number of operating refrigerators 43 based on the estimated heat demand and the rated heat amount per unit of the refrigerator 43. More specifically, the facility control unit 24 may determine the number of operating refrigerators 43 by dividing the rated heat amount per unit of the refrigerator 43 from the estimated heat demand.

  In addition, the facility control unit 24 may control the number of devices (the cooling tower 41, the cooling water pump 42, and the cooling water pump 44) of the air conditioning facility 4 other than the refrigerator 43. For example, the facility control unit 24 refers to the optimum cooling tower operation number information indicating the optimum number of operation of the cooling tower 41 with respect to the heat demand of the air conditioning equipment 4, and determines the optimum number of operation of the cooling tower 41 with respect to the estimated heat demand. The cooling tower 41 may be operated with the specified number. The optimum cooling tower operation number information may be a table in which the heat demand of the air conditioning equipment 4 and the operation number of the cooling tower 41 are associated with each other.

  The facility control unit 24 also controls the output (load factor, operating rate, operating frequency, etc.) of each device (cooling tower 41, cooling water pump 42, refrigerator 43, chilled water pump 44) of the air conditioning facility 4. Good.

  In addition, the facility control unit 24 refers to the optimum cold water flow temperature information (optimum fluid flow temperature information) indicating the optimum cold water flow temperature with respect to the heat demand of the air conditioning equipment 4, and determines the optimum cold water flow temperature for the estimated heat demand. Alternatively, the set temperature of the cold water pump 44 may be set. The optimum cold water temperature information may be a table in which the heat demand of the air conditioning equipment 4 is associated with the cold water temperature.

  Thereby, the equipment control unit 24 can automatically control each device of the air conditioning equipment 4 based on the estimated heat demand.

(Input analysis unit)
The input analysis unit 25 receives an instruction signal from the operation unit 15, analyzes the received instruction signal, specifies the operation content of the user, and executes processing according to the specified operation content. For example, when the user inputs the refrigerator efficiency of the refrigerator 43, the input analysis unit 25 stores the conversion function 31 having the input refrigerator efficiency of the refrigerator 43 as a coefficient in the storage unit 12.

(Memory part)
The storage unit 12 stores programs, data, and the like referred to by the control unit 11, and stores, for example, the conversion function 31 and the like.

[Control device processing]
Next, control processing of the control device 1 will be described with reference to FIG. FIG. 4 is a flowchart illustrating an example of a control process executed by the control device 1.

  As shown in FIG. 4, first, the data collection unit 21 receives refrigerator power data from the refrigerator power sensor 5 (S1: acquisition step). The estimated heat demand calculation unit 22 calculates the estimated heat demand based on the power consumption of the refrigerator 43 indicated by the refrigerator power data and the conversion function 31 (S2: estimated heat demand calculation step). The estimated heat demand calculation unit 22 outputs the calculated estimated heat demand to the display control unit 23 and the facility control unit 24 (output step). The facility control unit 24 determines the control content for each device of the air conditioning facility 4 based on the estimated heat demand, and transmits a control signal indicating the determined control content to the control repeater 2 via the communication unit 13. (S3: Control step). The control repeater 2 appropriately converts the control signal transmitted from the control device 1 and transfers it to each device of the air conditioning equipment 4. Each device of the air conditioning equipment 4 receives the control signal and operates according to the control content indicated by the received control signal. Moreover, while performing the process of S3, the display control part 23 displays the estimated heat demand on the display part 14 (S4: output step).

  In addition, the control apparatus 1 may perform only one process of S3 or S4. That is, the control device 1 may control only each device of the air conditioning equipment 4 based on the estimated heat demand without displaying the estimated heat demand after the process of S2. Moreover, the control apparatus 1 may perform only the display to the display part 14 of estimated heat demand, without performing control of the air conditioning equipment 4 based on estimated heat demand after the process of S2.

  As described above, the control device 1 according to the present embodiment can estimate the heat demand of the air conditioning equipment 4 without installing a flow sensor in the air conditioning equipment 4. Therefore, by introducing the control device 1 (equipment control system 9) according to the present embodiment, high cost-effectiveness can be obtained with regard to energy saving. Moreover, since it is not necessary to install a flow sensor, the facility control system 9 according to the present embodiment can be easily introduced to the existing air conditioning facility 4.

〔Example〕
Next, an example of this embodiment will be described.

  First, the actual measurement value of the heat demand of the air conditioning equipment 4 calculated using the prior art is shown in FIG. FIG. 5 is a graph in which the actual heat demand 51 of the air conditioning equipment 4 calculated using the prior art is plotted with the vertical axis representing heat demand (MJ) and the horizontal axis representing time. The actual heat demand 51 shown in FIG. 5 is obtained by installing a flow sensor and a temperature sensor in the air conditioning equipment 4 and multiplying the cold water flow rate by the cold water return temperature difference.

  FIG. 6 shows the estimated heat demand of the air conditioning equipment 4 estimated by the control device 1 according to this embodiment. FIG. 6 is a graph in which the estimated heat demand 52 of the air conditioning equipment 4 estimated by the control device 1 according to the present embodiment is plotted with the vertical axis representing heat demand (MJ) and the horizontal axis representing time. In addition, in the graph shown in FIG. 6, the actual heat demand 51 of the air conditioning equipment 4 calculated using the prior art shown in FIG. 5 is also plotted. In this embodiment, the refrigerator efficiency is used as the coefficient a of the conversion function 31 (f (x) = ax), and the value “6.0” of the refrigerator efficiency with a load factor of 100% is used as the coefficient a.

  From the results shown in FIG. 6, the estimated heat demand 52 of the air conditioning equipment 4 estimated by the control device 1 according to this embodiment is less than the actual heat demand 51 of the air conditioning equipment 4. It is almost reproduced.

  Since the estimated heat demand 52 of the air conditioning equipment 4 estimated by the control device 1 according to the present embodiment is correlated with the actual heat demand, it is sufficiently utilized for controlling the air conditioning equipment 4 such as control of the number of refrigerators. can do. That is, the control device 1 according to the present embodiment can estimate the heat demand of the air conditioning equipment 4 with sufficient accuracy for use in controlling the air conditioning equipment 4.

<Embodiment 2>
Another embodiment (second embodiment) of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those shown in the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  In the second embodiment, the conversion function 31 is derived by learning, and the estimation error of the estimated heat demand is reduced compared to the first embodiment. Hereinafter, in the second embodiment, differences from the first embodiment will be mainly described.

[Outline of equipment control system]
First, the outline | summary of the equipment control system which concerns on this embodiment is demonstrated based on FIG. FIG. 7 is a block diagram illustrating an example of a configuration of the facility control system 9a according to the second embodiment.

  As shown in FIG. 7, the facility control system 9 a includes a control device 1 a instead of the control device 1 and further includes a cold water return temperature sensor 6, as compared with the facility control system 9.

(Control device)
The control device 1a derives the conversion function 31 in advance by learning, estimates the heat demand of the air conditioning equipment 4 using the derived conversion function, and controls the air conditioning equipment 4 based on the estimated heat demand. is there. Details of the configuration and functions of the control device 1a will be described later.

(Chilled water return temperature sensor)
The cold water return temperature sensor 6 is a sensor that measures the temperature of the cold water returning from the air conditioner 45 to the refrigerator 43 (cold water return temperature). When the air conditioning equipment 4 includes a plurality of refrigerators 43, the cold water return temperature sensor 6 measures the cold water return temperature of each of the plurality of refrigerators 43. The cold water return temperature sensor 6 transmits cold water return temperature data (fluid return temperature data) indicating the measured cold water return temperature to the control device 1a.

[Configuration of control device]
Next, the configuration of the control device 1a according to the present embodiment will be described with reference to FIG. FIG. 8 is a block diagram illustrating an example of a main configuration of the control device 1a according to the second embodiment. As illustrated in FIG. 8, the control device 1 a includes a control unit 11 a instead of the control unit 11 and includes a storage unit 12 a instead of the storage unit 12 as compared with the control device 1 according to the first embodiment. Yes.

(Memory part)
Compared with the storage unit 12 according to the first embodiment, the storage unit 12a further stores a device setting value 32.

  The device setting value 32 is a setting value set for each device of the air conditioning equipment 4. For example, the device set value 32 includes the set temperature of the chilled water supplied by the refrigerator 43 (that is, the chilled water going temperature), the set flow rate of the chilled water pump 44, the cooling tower 41, the cooling water pump 42, the chiller 43, and the chilled water pump 44. The number of operating units, the output value or the output rate (load factor, operating frequency, etc.) for each of the cooling tower 41, the cooling water pump 42, the refrigerator 43, and the cooling water pump 44 are included.

  The device setting value 32 may be set by the equipment control unit 24. That is, the facility control unit 24 transmits a control signal to the air conditioning facility 4 and stores the device setting value 32 corresponding to the control content indicated by the control signal in the storage unit 12a. The device setting value 32 may be set by the user. That is, when the user inputs a set value of each device of the air conditioning equipment 4, the input analysis unit 25 stores the input set value as the device set value 32 in the storage unit 12 a.

(Control part)
In this embodiment, compared with the control unit 11 according to the first embodiment, the control unit 11a replaces the data collection unit 21 and the estimated heat demand calculation unit 22 with a data collection unit 21a and an estimated heat demand calculation unit 22a. And an effective heat demand calculating unit 26 and a conversion function deriving unit (function deriving unit) 27.

  Moreover, the control part 11a switches learning mode and control mode by a user's operation. The control unit 11a executes a learning process described later in the learning mode, and executes the control process shown in FIG. 4 in the control mode. The control unit 11a may automatically continue the control process after executing the learning process.

  In the learning mode, cold water is circulated at a fixed flow rate to the cold water pump 44 of the air conditioning equipment 4. The facility control unit 24 may transmit a control signal to set the set flow rate of the chilled water pump 44 to a predetermined fixed value, or the user may manually set the set flow rate of the chilled water pump 44 to a predetermined fixed value. May be.

  Thus, in the learning mode, the set flow rate of the chilled water pump 44 is set to a predetermined fixed value, and the fixed value is input to the control device 1, so that the control can be performed without installing the flow rate sensor in the air conditioning equipment 4. The device 1 can know the cold water flow rate in the learning mode.

(Data collection part)
The data collection unit 21 a collects sensor data transmitted from sensors installed in each device of the air conditioning equipment 4. Specifically, the data collection unit 21a receives refrigerator power data from the refrigerator power sensor 5 installed in the refrigerator 43 of the air conditioning equipment 4 in the control mode. The data collection unit 21a outputs the received refrigerator power data to the estimated heat demand calculation unit 22a. On the other hand, in the learning mode, the data collection unit 21 a freezes the cold water return temperature data from the cold water return temperature sensor 6 installed in the air conditioning equipment 4 and the freezer power sensor 5 installed in the refrigerator 43 of the air conditioning equipment 4. Receive power data. The data collection unit 21 a outputs the received chilled water return temperature data to the effective heat demand calculation unit 26, and outputs the received refrigerator power data to the conversion function derivation unit 27.

(Effective heat demand calculator)
The effective heat demand calculation unit 26 calculates an actual heat demand value (effective heat demand) of the air conditioning equipment 4 in the learning mode. Specifically, the effective heat demand calculation unit 26 receives the cold water return temperature data from the data collection unit 21a, and reads the device setting value 32 from the storage unit 12a. The effective heat demand calculating unit 26 then sets the cold water return temperature indicated by the received cold water return temperature data, the preset set temperature of the refrigerator 43 indicated by the read device setting value 32, and the set flow rate of the cold water pump 44. Based on the above, the effective heat demand of the air conditioning equipment 4 in the learning mode is calculated. More specifically, the effective heat demand calculation unit 26 calculates the effective heat demand by multiplying the difference value between the set temperature (ie, the cold water flow temperature) and the cold water return temperature by the set flow rate (ie, the cold water flow rate). To do. The effective heat demand calculating unit 26 outputs the calculated effective heat demand to the conversion function deriving unit 27. Note that the effective heat demand calculation unit 26 may calculate the effective heat demand in consideration of the specific gravity of the chilled water, the specific heat of the chilled water, and the like in addition to the chilled water return temperature difference and the chilled water flow rate.

(Conversion function derivation unit)
The conversion function deriving unit 27 derives a function representing the correspondence relationship between the effective heat demand of the air conditioning equipment 4 and the power consumption of the refrigerator 43 as the conversion function 31 in the learning mode. Specifically, the conversion function deriving unit 27 receives the refrigerator power data from the data collecting unit 21 a and receives the effective heat demand from the effective heat demand calculating unit 26. Then, the conversion function deriving unit 27 derives a function representing a correspondence relationship between the received effective heat demand and the power consumption of the refrigerator 43 indicated by the received refrigerator power data. The conversion function deriving unit 27 stores the derived function as the conversion function 31 in the storage unit 12a.

  For example, the conversion function deriving unit 27 normalizes the total effective heat demand of the entire air conditioning equipment 4 and the total power consumption of the entire refrigerator 43 with the rating of one refrigerator as 100, respectively, and the thermal load factor and power Convert to quantity load factor. Then, as shown in FIG. 9, the conversion function deriving unit 27 plots the converted thermal load factor and the electric energy load factor with the vertical axis as the thermal load factor and the horizontal axis as the electric energy load factor. The function may be derived by obtaining an approximate straight line.

(Estimated heat demand calculator)
The estimated heat demand calculation unit 22 a estimates the heat demand of the air conditioning equipment 4. Specifically, the estimated heat demand calculation unit 22a receives the refrigerator power data from the data collection unit 21, and reads the conversion function 31, that is, the function derived by the conversion function deriving unit 27 from the storage unit 12. And the estimated heat demand calculation part 22a calculates the value with respect to the power consumption of the refrigerator 43 which the received refrigerator power data shows as an estimated heat demand using the read function. The estimated heat demand calculation unit 22 a outputs the calculated estimated heat demand to the display control unit 23 and the equipment control unit 24. In other words, the estimated heat demand calculation unit 22 uses the function derived by the conversion function deriving unit 27 to calculate the estimated heat demand from the power consumption of the refrigerator 43 indicated by the refrigerator power data.

(Equipment control unit)
The equipment control unit 24 according to the present embodiment may control each device of the air conditioning equipment 4 based on the estimated heat demand and the cold water return temperature in addition to the processing described in the first embodiment. For example, the facility control unit 24 refers to the optimum chilled water flow rate information indicating the optimum chilled water flow rate for the heat demand of the air conditioning equipment 4 and the chilled water return temperature difference, and determines the optimum chilled water flow rate for the estimated heat demand and the chilled water return temperature difference. The specified flow rate of the cold water pump 44 may be set to the specified value of the cold water flow rate. The optimum chilled water flow rate information may be a table in which the heat demand of the air conditioner 4 and the chilled water return temperature difference are associated with each other. Further, the facility control unit 24 calculates the chilled water return temperature difference from the chilled water return temperature indicated by the chilled water return temperature data and the set temperature of the refrigerator 43.

[Control device processing]
Next, the learning process of the control device 1a according to the present embodiment will be described with reference to FIG. FIG. 10 is a flowchart illustrating an example of a learning process of the control device 1a according to the second embodiment.

  As shown in FIG. 10, first, the data collection unit 21a receives the cold water return temperature data from the cold water return temperature sensor 6 and the refrigerator power data from the refrigerator power sensor 5 (S11). The effective heat demand calculation unit 26 is based on the cold water return temperature indicated by the cold water return temperature data, the set temperature of the refrigerator 43 indicated by the device setting value 32 stored in the storage unit 12a, and the set flow rate of the cold water pump 44. Then, the effective heat demand of the air conditioning equipment 4 in the learning mode is calculated (S12).

  Here, the conversion function deriving unit 27 determines whether or not the number of data of the effective heat demand sufficient to derive the conversion function has been collected (S13). If there is not enough effective heat demand data to derive the conversion function (when the conversion function cannot be derived) (NO in S13), the process returns to S11 and sensor data is collected again. On the other hand, when the number of effective heat demand data sufficient to derive the conversion function is collected (YES in S13), the conversion function deriving unit 27 calculates the effective heat demand of the air conditioning equipment 4 in the learning mode and the refrigeration. A function representing a correspondence relationship with the power consumption of the refrigerator 43 indicated by the machine power data is derived (S14). The conversion function deriving unit 27 stores the derived function as the conversion function 31 in the storage unit 12a (S15).

  Moreover, the control process of the control apparatus 1a which concerns on this embodiment is the same as the control process of the control apparatus 1 which concerns on Embodiment 1 shown in FIG. In the control process according to the present embodiment, as described above, the estimated heat demand calculation unit 22a calculates the estimated heat demand using the function derived by the conversion function deriving unit 27.

〔Example〕
Next, an example of this embodiment will be described.

  FIG. 11 shows the estimated heat demand of the air conditioning equipment estimated by the control device 1a according to the present embodiment, that is, the estimated heat demand estimated using the function derived by learning. FIG. 11 is a graph in which the estimated heat demand 53 of the air conditioning equipment 4 estimated by the control device 1a according to the present embodiment is plotted, with the vertical axis representing heat demand (MJ) and the horizontal axis representing time. In the graph shown in FIG. 11, the actual heat demand 51 of the air conditioning equipment 4 calculated using the conventional technology shown in FIG. 5 and the air conditioning equipment 4 estimated by the control device 1 according to the first embodiment shown in FIG. The estimated heat demand 52 is also plotted. In the present embodiment, the conversion function deriving unit 27 derives f (x) = ax + b as the conversion function.

  From the results shown in FIG. 6, the estimated heat demand 53 of the air conditioning equipment 4 estimated by the control device 1 a according to the present embodiment is approximately less than the actual heat demand 51 of the actual air conditioning equipment 4. It was 5%.

  Therefore, the heat demand can be estimated with high accuracy by using the conversion function derived by learning. Therefore, the control apparatus 1a can control each apparatus of the air-conditioning equipment 4 with the control content according to more actual heat demand, and can perform energy saving more effectively.

<Embodiment 3>
Another embodiment (Embodiment 3) of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those shown in the first embodiment and the second embodiment are given the same reference numerals, and explanation thereof is omitted.

  In the second embodiment, the cold water flow rate (the set flow rate of the cold water pump 44) must be fixed in order to estimate the cold water flow rate without installing a flow sensor. However, the air conditioner 4 may change the operation content of the air conditioner according to the judgment of the site operator or the control of the existing system in order to maintain the comfort of the room or maintain the facility. Therefore, the set flow rate of the cold water pump 44 may not be fixed, and the learning process may not be executed.

  Therefore, in the present embodiment, the learning process can be normally executed even if the cold water flow rate fluctuates. Specifically, in the present embodiment, the cold water flow rate is estimated from the power consumption of the cold water pump 44, and the effective heat demand is calculated based on the estimated cold water flow rate. Hereinafter, the points of the third embodiment different from the second embodiment will be mainly described.

[Outline of equipment control system]
First, the outline | summary of the equipment control system which concerns on this embodiment is demonstrated based on FIG. FIG. 12 is a block diagram illustrating an example of the configuration of the facility control system 9b according to the third embodiment.

  As shown in FIG. 12, the equipment control system 9b includes a control device 1b instead of the control device 1a, and further includes a chilled water pump power sensor 7, as compared with the equipment control system 9a.

(Control device)
The control device 1b derives the conversion function 31 in advance by learning, estimates the heat demand of the air conditioning equipment 4 using the derived conversion function, and controls the air conditioning equipment 4 based on the estimated heat demand. is there. Details of the configuration and functions of the control device 1b will be described later.

(Cold water pump power sensor)
The chilled water pump power sensor 7 is a sensor that measures the power consumption of the chilled water pump 44 of the air conditioning equipment 4. When the air conditioning equipment 4 includes a plurality of cold water pumps 44, the cold water pump power sensor 7 measures the power consumption of each of the plurality of cold water pumps 44. The chilled water pump power sensor 7 transmits chilled water pump power data (fluid pump power data) indicating the measured power consumption of the chilled water pump 44 to the control device 1b.

[Configuration of control device]
Next, the configuration of the control device 1b according to the present embodiment will be described with reference to FIG. FIG. 13 is a block diagram illustrating an example of a main configuration of the control device 1b according to the third embodiment. As illustrated in FIG. 13, the control device 1b includes a control unit 11b in place of the control unit 11a, as compared with the control device 1a according to the second embodiment.

(Control part)
In the present embodiment, the control unit 11b is different from the control unit 11a according to the second embodiment in that the data collection unit 21b and the effective heat demand calculation unit 26b are replaced with the data collection unit 21a and the effective heat demand calculation unit 26. And a chilled water flow rate estimating unit (flow rate estimating unit) 28.

  Moreover, the control part 11b switches learning mode and control mode by a user's operation similarly to the control part 11a which concerns on Embodiment 2. FIG. The control unit 11b executes a learning process described later in the learning mode, and executes the control process shown in FIG. 4 in the control mode. The control unit 11b may automatically continue the control process after executing the learning process.

  In the present embodiment, as described above, unlike the second embodiment, the learning process is executed without fixing the set flow rate of the chilled water pump 44.

(Data collection part)
The data collection unit 21 b collects sensor data transmitted from sensors installed in each device of the air conditioning equipment 4. Specifically, the data collection unit 21b receives refrigerator power data from the refrigerator power sensor 5 installed in the refrigerator 43 of the air conditioning equipment 4 in the control mode. The data collection unit 21b outputs the received refrigerator power data to the estimated heat demand calculation unit 22a. On the other hand, in the learning mode, the data collection unit 21b receives the chilled water pump power data from the chilled water pump power sensor 7 installed in the chilled water pump 44 of the air conditioning equipment 4 and the chilled water return temperature from the chilled water return temperature sensor 6 installed in the air conditioning equipment 4. The data and the refrigerator power data are received from the refrigerator power sensor 5 installed in the refrigerator 43 of the air conditioning equipment 4. The data collection unit 21b outputs the received chilled water pump power data to the chilled water flow rate estimation unit 28, outputs the received chilled water return temperature data to the effective heat demand calculation unit 26b, and derives a conversion function derivation from the received refrigerator power data. To the unit 27.

(Cooling water flow estimation part)
The cold water flow rate estimating unit 28 estimates a cold water flow rate. Specifically, the chilled water flow rate estimating unit 28 receives the chilled water pump power data from the data collecting unit 21b, and estimates the chilled water flow rate based on the power consumption of the chilled water pump 44 indicated by the received chilled water pump power data. The chilled water flow rate estimating unit 28 outputs the estimated chilled water flow rate (estimated flow rate) to the effective heat demand calculating unit 26b.

  For example, the cold water flow rate estimation unit 28 may estimate the cold water flow rate based on the following mathematical formula (1). In Expression (1), “rated flow rate” and “rated power” are the rated flow rate and rated power of one chilled water pump 44. “Pump power” is power consumption of the chilled water pump 44 indicated by the chilled water pump power data.

また、冷水流量推定部２８は、受け取った冷水ポンプ電力データが示す冷水ポンプ４４の消費電力が一定の変動幅内に収まっている場合、冷水流量が変動していないと判断し、事前に設定した冷水ポンプ４４の設定流量を推定流量としてもよい。

Further, the chilled water flow rate estimation unit 28 determines that the chilled water flow rate has not fluctuated when the power consumption of the chilled water pump 44 indicated by the received chilled water pump power data is within a certain fluctuation range, and is set in advance. The set flow rate of the cold water pump 44 may be an estimated flow rate.

(Effective heat demand calculator)
The effective heat demand calculation unit 26b calculates an actual heat demand value (effective heat demand) of the air conditioning equipment 4 in the learning mode. Specifically, the effective heat demand calculation unit 26b receives the chilled water return temperature data from the data collection unit 21a, reads the device setting value 32 from the storage unit 12a, and calculates the estimated flow rate of the chilled water pump 44 from the chilled water flow rate estimation unit 28. receive. Then, the effective heat demand calculating unit 26b uses the cold water return temperature indicated by the received cold water return temperature data, the preset set temperature of the refrigerator 43 indicated by the read device setting value 32, and the received estimated flow rate. Based on this, the effective heat demand of the air conditioning equipment 4 in the learning mode is calculated. More specifically, the effective heat demand calculation unit 26b calculates the effective heat demand by multiplying the difference value between the set temperature (that is, the cold water going temperature) and the cold water return temperature by the estimated flow rate. The effective heat demand calculation unit 26 b outputs the calculated effective heat demand to the conversion function deriving unit 27.

[Control device processing]
Next, the learning process of the control device 1b according to the present embodiment will be described with reference to FIG. FIG. 14 is a flowchart illustrating an example of a learning process of the control device 1b according to the third embodiment.

  As shown in FIG. 14, first, the data collection unit 21 b receives the chilled water pump power data from the chilled water pump power sensor 7, the chilled water return temperature data from the chilled water return temperature sensor 6, and the chiller power data from the refrigerator power sensor 5. Receive (S21). The chilled water flow rate estimation unit 28 estimates the chilled water flow rate based on the power consumption of the chilled water pump 44 indicated by the chilled water pump power data (S22). Based on the cold water return temperature indicated by the cold water return temperature data, the cold water return temperature indicated by the device setting value 32 stored in the storage unit 12a, and the estimated flow rate, the effective heat demand calculation unit 26b is in the learning mode. The effective heat demand of the air conditioning equipment 4 is calculated (S23).

  Here, the conversion function deriving unit 27 determines whether or not the number of data of the effective heat demand sufficient to derive the conversion function has been collected (S24). If there is not enough effective heat demand data to derive the conversion function (when the conversion function cannot be derived) (NO in S24), the process returns to S11 and sensor data is collected again. On the other hand, when the number of effective heat demand data sufficient to derive the conversion function is collected (YES in S24), the conversion function deriving unit 27 calculates the effective heat demand of the air conditioning equipment 4 in the learning mode, A function representing a correspondence relationship with the power consumption of the refrigerator 43 indicated by the machine power data is derived (S25). The conversion function deriving unit 27 stores the derived function as the conversion function 31 in the storage unit 12a (S26).

  Moreover, the control process of the control apparatus 1b which concerns on this embodiment is the same as the control process of the control apparatus 1 which concerns on Embodiment 1 shown in FIG. In the control process according to the present embodiment, the estimated heat demand calculating unit 22a calculates the estimated heat demand using the function derived by the conversion function deriving unit 27, as in the second embodiment.

<Embodiment 4>
Another embodiment (Embodiment 4) of the present invention will be described below with reference to FIG. For convenience of explanation, members having the same functions as those shown in the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  The fourth embodiment further has a function of evaluating the basic unit of the air conditioning equipment based on the estimated heat demand and outputting the evaluation result. In the following, in the fourth embodiment, differences from the first embodiment will be mainly described.

[Configuration of control device]
The structure of the control apparatus 1c which concerns on this embodiment is demonstrated based on FIG. FIG. 15 is a block diagram illustrating an example of a main configuration of a control device 1c according to the fourth embodiment. As illustrated in FIG. 15, the control device 1 c includes a control unit 11 c instead of the control unit 11 as compared with the control device 1 according to the first embodiment.

(Control part)
In this embodiment, compared with the control unit 11 according to the first embodiment, the control unit 11c replaces the estimated heat demand calculation unit 22 and the display control unit 23 with an estimated heat demand calculation unit 22c and a display control unit. 23c, and further includes a basic unit evaluation unit 29.

(Estimated heat demand calculator)
The estimated heat demand calculation unit 22 c estimates the heat demand of the air conditioning equipment 4. The estimated heat demand calculation unit 22 c outputs the calculated estimated heat demand to the basic unit evaluation unit 29 in addition to the display control unit 23 and the facility control unit 24.

(Basic unit evaluation department)
The basic unit evaluation unit 29 evaluates the basic unit of the air conditioning equipment based on the estimated heat demand, and outputs the evaluation result. Specifically, the basic unit evaluation unit 29 receives the estimated heat demand from the estimated heat demand calculation unit 22c, and divides the received estimated heat demand by the total floor area of the space where the air conditioning equipment performs air conditioning. The basic unit is calculated. Then, the basic unit evaluation unit 29 calculates the basic unit and the past basic unit of the same air conditioning equipment 4 or the basic unit of another air conditioning equipment (such as the same type of air conditioning equipment installed in another place). Compare The basic unit evaluation unit 29 outputs the comparison result to the display control unit 23c.

  For example, the basic unit evaluation unit 29 subtracts the past basic unit of the same air conditioning equipment 4 from the calculated basic unit, determines whether or not the subtracted value is larger than a predetermined threshold value, and controls the display of the determination result. You may output to the part 23c. In addition, the basic unit evaluation unit 29 specifies the fluctuation range of the calculated basic unit in a predetermined period, subtracts the fluctuation range of the basic unit of other air conditioning equipment from the specified fluctuation range, and the subtraction value is a predetermined value. It may be determined whether it is larger than the threshold value, and the determination result may be output to the display control unit 23c. The basic unit evaluation unit 29 determines whether the calculated basic unit or the fluctuation range of the calculated basic unit in a predetermined period is greater than a predetermined threshold, and outputs the determination result to the display control unit 23c. May be.

(Display control unit)
The display control unit 23 displays an image or characters on the display unit 14. Specifically, the display control unit 23 receives the comparison result (determination result) from the basic unit evaluation unit 29 and causes the display unit 14 to display an image or the like based on the received comparison result.

  For example, when the display control unit 23 receives a determination result indicating that the basic unit (or fluctuation range) is larger than a predetermined threshold, “the basic unit of your facility has recently increased abnormally (or changed). Has been confirmed. Perhaps the influence of outside temperature, people coming in and out, heat generation equipment, etc. Check to see if the demand is right. Or the like may be displayed on the display unit 14.

  As a result, the control device 1c prompts the user to confirm the state of the air conditioning equipment 4 with respect to external factors (changes in outside air temperature), internal factors (such as people coming in and out, equipment heat generation, etc.). And energy saving can be maintained.

  Although the present embodiment has been described as a modification of the first embodiment, the configuration according to the present embodiment can also be applied to the second and third embodiments.

<Embodiment 5>
Another embodiment (Embodiment 5) of the present invention will be described below with reference to FIG. For convenience of explanation, members having the same functions as those shown in the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  In the fifth embodiment, the control device 1 according to the first embodiment is separated into a heat demand estimation device that estimates and outputs heat demand, and a facility control device that controls each device of the air conditioning equipment 4 based on the estimated heat demand. doing. Hereinafter, in the fifth embodiment, differences from the first embodiment will be mainly described.

[Configuration of control device]
The configuration of the control device 1d according to the present embodiment will be described with reference to FIG. FIG. 16 is a block diagram illustrating an example of a main configuration of a control device 1d according to the fifth embodiment. As illustrated in FIG. 16, the control device 1 d includes a heat demand estimation device 100 and a facility control device 200.

[Configuration of heat demand estimation device]
As illustrated in FIG. 16, the heat demand estimation device 100 includes a control unit 110, a storage unit 120, a communication unit 130, a display unit 140, and an operation unit 150.

  The storage unit 120, the communication unit 130, the display unit 140, and the operation unit 150 have the same functions as the storage unit 12, the communication unit 13, the display unit 14, and the operation unit 15 according to the first embodiment.

  The control part 110 is a structure provided with the data collection part 21, the estimated heat demand calculation part 22, the display control part 23, and the input analysis part 25 as a functional block.

  The estimated heat demand calculation unit 22 outputs the calculated estimated heat demand to the display control unit 23 and transmits it to the equipment control device 200 via the communication unit 130.

[Configuration of equipment control device]
As shown in FIG. 16, the facility control apparatus 200 includes a control unit 210, a storage unit 220, and a communication unit 230.

  The storage unit 120 and the communication unit 130 have the same functions as the storage unit 12 and the communication unit 13 according to the first embodiment.

  The control part 210 is a structure provided with the equipment control part 24 as a functional block.

  The facility control unit 24 acquires the estimated heat demand from the estimated heat demand calculation unit 22 via the communication unit 230, and controls each device of the air conditioning facility 4 based on the acquired estimated heat demand.

  Note that the configuration according to the present embodiment is applicable not only to the first embodiment but also to any of the second to fourth embodiments.

<Embodiment 6>
Another embodiment (sixth embodiment) of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those shown in the first to third embodiments are given the same reference numerals, and explanation thereof is omitted.

  In the third embodiment, the chilled water flow rate is estimated from the power consumption of the chilled water pump 44. Instead, in this embodiment, the chilled water flow rate is estimated from the chilled water return temperature difference. That is, also in the present embodiment, as in the third embodiment, the learning process can be normally executed even if the chilled water flow rate fluctuates. In the following, in the sixth embodiment, differences from the third embodiment will be mainly described.

[Outline of equipment control system]
First, the outline | summary of the equipment control system which concerns on this embodiment is demonstrated based on FIG. FIG. 17 is a block diagram illustrating an example of a configuration of an equipment control system 9e according to the sixth embodiment.

  As shown in FIG. 17, the equipment control system 9e is different from the equipment control system 9b in that the control device 1e, the chilled water return temperature sensor 6, and the chilled water pump power sensor 7 are replaced with the control device 1e and the chilled water return temperature sensor, respectively. 6e, a cold water flow temperature sensor 8 is provided, and a cold water pump control device 46 is further provided.

(Control device)
The control device 1e derives the conversion function 31 in advance by learning, estimates the heat demand of the air conditioning equipment 4 using the derived conversion function, and other than the chilled water pump 44 of the air conditioning equipment 4 based on the estimated heat demand. It controls the equipment. Details of the configuration and functions of the control device 1e will be described later.

(Chilled water return temperature sensor)
The chilled water return temperature sensor 6e has the same function as the chilled water return temperature sensor 6 and is a sensor that measures the temperature of the chilled water returning from the air conditioner 45 to the refrigerator 43 (cold water return temperature). The cold water return temperature sensor 6e transmits cold water return temperature data indicating the measured cold water return temperature to the control device 1e and the cold water pump control device 46.

(Cooling water temperature sensor)
The cold water temperature sensor 8 is a sensor that measures the temperature of the cold water (cold water temperature) supplied from the refrigerator 43 to the air conditioner 45. When the air conditioning equipment 4 includes a plurality of refrigerators 43, the cold water temperature sensor 8 measures the cold water temperature of each of the plurality of refrigerators 43. The chilled water temperature sensor 8 transmits chilled water temperature data (fluid temperature data) indicating the measured chilled water temperature to the control device 1e and the chilled water pump control device.

(Cold water pump control device)
The chilled water pump control device 46 controls the number of chilled water pumps 44 included in the air conditioning equipment 4 and the output (operating rate) of each chilled water pump 44 to control the chilled water flow rate. Specifically, the chilled water pump control device 46 receives the chilled water return temperature data and the chilled water return temperature data from the chilled water return temperature sensor 6e and the chilled water return temperature sensor 8, and the chilled water return temperature data and the chilled water return temperature data indicated by the chilled water return temperature data. The cold water return temperature difference which is a difference with the cold water going temperature which is shown in FIG. Then, the chilled water pump control device 46 determines the number of operating chilled water pumps 44 and the output of each chilled water pump 44 from the calculated chilled water return temperature difference using a predetermined algorithm, and the chilled water pumps 44 with the determined operating number and output. The cold water pump 44 is controlled so as to operate. By assuming that the chilled water pump 44 operates at the rated value, the chilled water pump control device 46 can control the chilled water flow rate when the chilled water pump 44 operates with the determined number of operating units and output.

  In the present embodiment, the chilled water pump control device 46 includes a storage unit (not shown) that stores chilled water pump output control information indicating a correspondence relationship between the chilled water return temperature difference and the output of the chilled water pump 44. With reference to the output control information, the output of the chilled water pump 44 corresponding to the chilled water return temperature difference is determined. In this case, the chilled water pump control device 46 controls all the chilled water pumps 44 included in the air conditioning equipment 4 to operate at an output corresponding to the chilled water return temperature difference. That is, the chilled water pump control device 46 controls the chilled water pumps 44 included in the air conditioning equipment 4 to operate with the same output.

  Here, the cold water pump output control information may be information as shown in FIG. 18, for example. FIG. 18 is a graph showing a correspondence relationship between the chilled water return temperature difference and the inverter frequency of the chilled water pump 44. As shown in FIG. 18, the inverter frequency (the output of the chilled water pump 44) increases as the value (absolute value) of the chilled water return temperature difference increases. The chilled water pump output control information is not limited to that shown in FIG. 18, and may be arbitrary as long as the chilled water return temperature difference and the output of the chilled water pump 44 are in an increasing relationship.

[Configuration of control device]
Next, the structure of the control apparatus 1e which concerns on this embodiment is demonstrated based on FIG. FIG. 19 is a block diagram illustrating an example of a main configuration of a control device 1e according to the sixth embodiment. As illustrated in FIG. 19, the control device 1e includes a control unit 11e and a storage unit 12e, respectively, instead of the control unit 11b and the storage unit 12a, as compared with the control device 1b according to the third embodiment.

(Memory part)
The storage unit 12e further stores chilled water pump output control information 33 as compared with the storage unit 12a according to the third embodiment. The chilled water pump output control information 33 is the same as the chilled water pump output control information stored in the storage unit of the chilled water pump control device 46. In other words, in this embodiment, the predetermined algorithm used by the chilled water pump control device 46 only needs to be stored in the storage unit 12e. The predetermined algorithm is an algorithm for determining the number of operating chilled water pumps 44 and each chilled water pump 44 from the chilled water return temperature difference.

(Control part)
In the present embodiment, the control unit 11e is replaced with the data collection unit 21b, the equipment control unit 24, the effective heat demand calculation unit 26b, and the chilled water flow rate estimation unit 28 as compared with the control unit 11b according to the third embodiment. Each configuration includes a data collection unit (acquisition unit) 21e, an equipment control unit (control unit) 24e, an effective heat demand calculation unit 26e, and a cold water flow rate estimation unit (flow rate estimation unit) 28e.

(Data collection part)
The data collection unit 21e collects sensor data transmitted from sensors installed in each device of the air conditioning equipment 4. Specifically, the data collection unit 21e receives refrigerator power data from the refrigerator power sensor 5 installed in the refrigerator 43 of the air conditioning equipment 4 in the control mode. The data collection unit 21e outputs the received refrigerator power data to the estimated heat demand calculation unit 22a. On the other hand, in the learning mode, the data collection unit 21e receives the cold water return temperature data from the cold water return temperature sensor 6e installed in the air conditioner 4, the cold water return temperature data from the cold water return temperature sensor 8 installed in the air conditioner 4, and Refrigerating machine power data is received from the refrigerator power sensor 5 installed in the refrigerator 43 of the air conditioning equipment 4. The data collection unit 21e outputs the received chilled water return temperature data and chilled water forward temperature data to the chilled water flow rate estimation unit 28e and the effective heat demand calculation unit 26e, and outputs the received refrigerator power data to the conversion function derivation unit 27. .

(Cooling water flow estimation part)
The chilled water flow rate estimating unit 28e estimates the chilled water flow rate based on the chilled water return temperature difference. Specifically, the chilled water flow rate estimation unit 28e receives the chilled water return temperature data and the chilled water return temperature data from the data collection unit 21e, and calculates the chilled water return temperature indicated by the chilled water return temperature data and the chilled water return temperature indicated by the chilled water return temperature data. The difference between the cold water return temperature and the difference is calculated. Then, the chilled water flow rate estimating unit 28e reads out the same algorithm as the algorithm used by the chilled water pump control device 46 from the storage unit 12e, and estimates the chilled water flow rate from the calculated chilled water return temperature difference based on the read algorithm. The chilled water flow rate estimating unit 28e outputs the estimated chilled water flow rate (estimated flow rate) to the effective heat demand calculating unit 26e.

  In the present embodiment, the chilled water flow rate estimation unit 28e reads the chilled water pump output control information 33 from the storage unit 12e, refers to the read chilled water pump output control information 33, and corresponds to the calculated chilled water return temperature difference. The output (inverter frequency) is specified. Then, the chilled water flow rate estimation unit 28e refers to the rated value of the chilled water pump 44, and specifies the chilled water flow rate when all the chilled water pumps 44 included in the air conditioning equipment 4 operate with the specified output.

  In other words, the chilled water flow rate estimating unit 28e estimates the chilled water flow rate controlled by the chilled water pump control device 46 based on the chilled water return temperature difference.

(Effective heat demand calculator)
The effective heat demand calculation unit 26e calculates an actual heat demand value (effective heat demand) of the air conditioning equipment 4 in the learning mode. Specifically, the effective heat demand calculation unit 26b receives the chilled water return temperature data and the chilled water forward temperature data from the data collection unit 21e, and receives the estimated flow rate of the chilled water pump 44 from the chilled water flow rate estimation unit 28e. Then, the effective heat demand calculating unit 26e performs the learning mode based on the cold water return temperature indicated by the received cold water return temperature data, the cold water return temperature indicated by the received cold water return temperature data, and the received estimated flow rate. The effective heat demand of the air conditioning equipment 4 is calculated. More specifically, the effective heat demand calculation unit 26e calculates the effective heat demand by multiplying the difference between the cold water going temperature and the cold water return temperature by the estimated flow rate. The effective heat demand calculation unit 26 e outputs the calculated effective heat demand to the conversion function deriving unit 27.

(Equipment Control Department)
The facility control unit 24 e controls each device other than the cold water pump 44 of the air conditioning facility 4. That is, the facility control unit 24e controls the cooling tower 41, the cooling water pump 42, the refrigerator 43, and the air conditioner 45 of the air conditioning facility 4.

  Note that the learning process of the control device 1e according to the present embodiment is the same as the learning process of the control device 1b according to the third embodiment illustrated in FIG.

  Further, in the present embodiment, the control device 1e has the same chilled water pump output control information 33 as the chilled water pump output control information included in the chilled water pump control device 46, and calculates the number of operating chilled water pumps 44 and the output from the chilled water return temperature difference. Although identified, it is not limited to this. For example, the cold water pump control device 46 may notify the determined number of operating cold water pumps 44 and the output to the control device 1e, and the control device 1e may estimate the cold water flow rate based on the notification.

  Further, the control device 1e and the cold water pump control device 46 may be integrated.

  Further, the configuration of Embodiment 4 or 5 can be applied to this embodiment.

<Example of implementation by software>
The control blocks (especially the control units 11, 11a, 11b, 11c, 110 and 210) of the control devices 1, 1a, 1b, 1c and 1d are formed by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like. It may be realized or may be realized by software using a CPU (Central Processing Unit).

  In the latter case, the control devices 1, 1 a, 1 b, 1 c, and 1 d are recorded such that a CPU that executes instructions of a program that is software that realizes each function, the program and various data can be read by a computer (or CPU). A ROM (Read Only Memory) or a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) for expanding the program, and the like. Then, the computer (or CPU) reads the program from the recording medium and executes it to achieve the object of the present invention. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used in a system that controls air conditioning equipment equipped with a heat exchanger.

1, 1a, 1b, 1c, 1d control device (heat demand estimation device, equipment control device)
4 Air-conditioning equipment 5 Refrigeration machine power sensor 6 Chilled water return temperature sensor 7 Chilled water pump power sensor 8 Chilled water feed temperature sensor 9 Equipment control systems 21, 21a, 21b, 21e Data collection unit
22, 22a, 22c Estimated heat demand calculation unit (output unit)
23, 23c Display control unit (output unit)
24, 24e Equipment control part (control part)
26, 26b, 26e Effective heat demand calculation unit 27 Conversion function deriving unit (function deriving unit)
28, 28e Chilled water flow rate estimation unit (flow rate estimation unit)
43 Refrigerator (heat exchanger)
100 heat demand estimation device 200 equipment control device

Claims (16)

A heat demand estimation device for estimating the heat demand of an air conditioner equipped with a heat exchanger,
An acquisition unit that acquires heat exchanger power data from a sensor that measures power consumption of the heat exchanger;
An estimated heat demand calculating unit that calculates an estimated heat demand that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit;
An output unit that outputs the estimated heat demand calculated by the estimated heat demand calculation unit , and
The acquisition unit further acquires fluid return temperature data from a sensor that measures the return temperature of the fluid supplied by the heat exchanger,
The actual heat demand at the time of learning based on the return temperature of the fluid indicated by the fluid return temperature data acquired by the acquisition unit, and the fluid forward temperature and the fluid flow rate preset in the air conditioning equipment An effective heat demand calculating unit for calculating an effective heat demand that is a value of
A function deriving unit for deriving a function representing the relationship between the effective heat demand calculated by the effective heat demand calculating unit and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit; ,
The estimated heat demand calculating unit calculates the estimated heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit using the function derived by the function deriving unit. A heat demand estimation device.   The estimated heat demand calculation unit calculates the estimated heat demand by multiplying power consumption of a heat exchanger indicated by the heat exchanger power data acquired by the acquisition unit by a predetermined heat exchanger efficiency. The heat demand estimation apparatus according to claim 1. A heat demand estimation device for estimating the heat demand of an air conditioner equipped with a heat exchanger,
An acquisition unit that acquires heat exchanger power data from a sensor that measures power consumption of the heat exchanger;
An estimated heat demand calculating unit that calculates an estimated heat demand that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit;
An output unit that outputs the estimated heat demand calculated by the estimated heat demand calculation unit, and
The acquisition unit further acquires fluid return temperature data from a sensor that measures a return temperature of a fluid supplied by the heat exchanger, and fluid pump power data from a sensor that measures power consumption of a fluid pump that circulates the fluid. ,
A flow rate estimating unit that estimates the flow rate of the fluid based on the power consumption of the fluid pump indicated by the fluid pump power data acquired by the acquiring unit;
Based on the return temperature of the fluid indicated by the fluid return temperature data acquired by the acquisition unit, the forward temperature of the fluid preset in the air conditioning equipment, and the flow rate of the fluid estimated by the flow rate estimation unit, An effective heat demand calculator that calculates an effective heat demand that is the actual value of the heat demand at the time of learning;
A function deriving unit for deriving a function representing the relationship between the effective heat demand calculated by the effective heat demand calculating unit and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit; ,
The estimated thermal demand amount calculation section, wherein the function deriving unit using the function derived calculates the estimated thermal demand from the power consumption of the heat exchanger in which the acquiring unit is indicated by the obtained heat exchanger power data A heat demand estimation device. A heat demand estimation device for estimating the heat demand of an air conditioner equipped with a heat exchanger,
An acquisition unit that acquires heat exchanger power data from a sensor that measures power consumption of the heat exchanger;
An estimated heat demand calculating unit that calculates an estimated heat demand that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit;
An output unit that outputs the estimated heat demand calculated by the estimated heat demand calculation unit, and
The acquisition unit further acquires fluid return temperature data from a sensor that measures the return temperature of the fluid supplied by the heat exchanger, and fluid forward temperature data from a sensor that measures the forward temperature of the fluid supplied by the heat exchanger. ,
Based on the fluid return temperature difference that is the difference between the fluid return temperature indicated by the fluid return temperature data acquired by the acquisition unit and the fluid return temperature indicated by the fluid return temperature data acquired by the acquisition unit. A flow rate estimation unit for estimating the flow rate of the fluid;
The return temperature of the fluid indicated by the fluid return temperature data acquired by the acquisition unit, the forward temperature of the fluid indicated by the fluid return temperature data acquired by the acquisition unit, and the flow rate of the fluid estimated by the flow rate estimation unit Based on the effective heat demand calculation unit that calculates the effective heat demand that is the actual value of the heat demand at the time of learning,
A function deriving unit for deriving a function representing the relationship between the effective heat demand calculated by the effective heat demand calculating unit and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired by the acquiring unit; ,
The estimated thermal demand amount calculation section, wherein the function deriving unit using the function derived calculates the estimated thermal demand from the power consumption of the heat exchanger in which the acquiring unit is indicated by the obtained heat exchanger power data A heat demand estimation device. The said output part displays the estimated heat demand calculated by the said estimated heat demand calculation part on a display part, The heat demand estimation apparatus of any one of Claims 1-4 characterized by the above-mentioned. The equipment control apparatus provided with the control part which controls the said air-conditioning equipment based on the estimated heat demand which the heat demand estimation apparatus of any one of the said Claims 1-5 estimated. Wherein the control unit includes: the heat demand estimating device estimates the heat demand estimated, based on the rated heat per the heat exchanger one, claim 6, characterized in that determining the number of operating the heat exchanger The equipment control device described in 1. The control unit refers to the optimum fluid advance temperature information indicating the optimum fluid advance temperature for the heat demand, and the heat exchanger determines the optimum fluid advance temperature for the estimated heat demand estimated by the heat demand estimation device. The equipment control device according to claim 6 , wherein the equipment control device is set as a set temperature of a fluid to be supplied. The heat demand estimation device according to any one of claims 1 to 5 ,
The equipment control device according to any one of claims 6 to 8 ,
A facility control system comprising: a sensor for measuring power consumption of the heat exchanger. A heat demand estimation method for estimating the heat demand of an air conditioner equipped with a heat exchanger,
An acquisition step of acquiring heat exchanger power data from a sensor that measures power consumption of the heat exchanger;
An estimated heat demand calculating step for calculating an estimated heat demand that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquiring step;
An output step for outputting the estimated heat demand calculated in the estimated heat demand calculation step ,
In the obtaining step, fluid return temperature data is further obtained from a sensor that measures the return temperature of the fluid supplied by the heat exchanger,
Based on the fluid return temperature indicated by the fluid return temperature data acquired in the acquisition step, and the fluid forward temperature and the fluid flow rate set in advance in the air conditioning equipment, the actual heat at the time of learning An effective heat demand calculating step for calculating an effective heat demand that is a value of demand;
A function derivation step for deriving a function representing the relationship between the effective heat demand calculated in the effective heat demand calculation step and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquisition step; In addition,
In the estimated heat demand calculation step, the estimated heat demand is calculated from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquisition step, using the function derived in the function derivation step. The heat demand estimation method characterized by this. A heat demand estimation method for estimating the heat demand of an air conditioner equipped with a heat exchanger,
An acquisition step of acquiring heat exchanger power data from a sensor that measures power consumption of the heat exchanger;
An estimated heat demand calculating step for calculating an estimated heat demand that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquiring step;
An output step for outputting the estimated heat demand calculated in the estimated heat demand calculation step,
In the obtaining step, fluid return temperature data is further obtained from a sensor that measures a return temperature of a fluid supplied by the heat exchanger, and fluid pump power data is further obtained from a sensor that measures power consumption of a fluid pump that circulates the fluid. ,
A flow rate estimating step for estimating the flow rate of the fluid based on the power consumption of the fluid pump indicated by the fluid pump power data acquired in the acquiring step;
Based on the return temperature of the fluid indicated by the fluid return temperature data acquired in the acquisition step, the forward temperature of the fluid preset in the air conditioning equipment, and the flow rate of the fluid estimated in the flow rate estimation step An effective heat demand calculating step for calculating an effective heat demand that is a value of the actual heat demand at the time of learning;
A function derivation step for deriving a function representing the relationship between the effective heat demand calculated in the effective heat demand calculation step and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquisition step; In addition,
In the estimated heat demand calculation step, the estimated heat demand is calculated from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquisition step, using the function derived in the function derivation step. The heat demand estimation method characterized by this. A heat demand estimation method for estimating the heat demand of an air conditioner equipped with a heat exchanger,
  An acquisition step of acquiring heat exchanger power data from a sensor that measures power consumption of the heat exchanger;
  An estimated heat demand calculating step for calculating an estimated heat demand that is an estimated value of the heat demand from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquiring step;
  An output step for outputting the estimated heat demand calculated in the estimated heat demand calculation step,
In the obtaining step, fluid return temperature data is further obtained from a sensor that measures the return temperature of the fluid supplied by the heat exchanger, and fluid forward temperature data is obtained from a sensor that measures the forward temperature of the fluid supplied by the heat exchanger. ,
  The fluid return temperature difference, which is the difference between the fluid return temperature indicated by the fluid return temperature data acquired in the acquisition step and the fluid forward temperature indicated by the fluid forward temperature data acquired in the acquisition step. A flow rate estimating step for estimating a flow rate of the fluid based on;
  The return temperature of the fluid indicated by the fluid return temperature data acquired in the acquisition step, the forward temperature of the fluid indicated by the fluid return temperature data acquired in the acquisition step, and the fluid estimated in the flow rate estimation step An effective heat demand calculating step for calculating an effective heat demand that is a value of the actual heat demand at the time of learning based on the flow rate of
  A function derivation step for deriving a function representing the relationship between the effective heat demand calculated in the effective heat demand calculation step and the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquisition step; In addition,
  In the estimated heat demand calculation step, the estimated heat demand is calculated from the power consumption of the heat exchanger indicated by the heat exchanger power data acquired in the acquisition step, using the function derived in the function derivation step. The heat demand estimation method characterized by this. An equipment control method for controlling air conditioning equipment,
The equipment control method characterized by including the control step which controls the said air-conditioning equipment based on the estimated heat demand estimated by the heat demand estimation method of any one of the said Claims 10-12 . A control program for causing a computer to function as the heat demand estimation device according to any one of claims 1 to 5 , wherein the control program causes the computer to function as each unit. A control program for causing a computer to function as the equipment control device according to any one of claims 6 to 8 , wherein the control program causes the computer to function as each unit. The computer-readable recording medium which recorded the control program of Claim 14 or 15 .

Images