JP2013040705A - Controller, control method, control program and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve energy-saving with high cost-effectiveness in an air conditioning system, and to facilitate introduction.SOLUTION: A set temperature corresponding to a measured load-heat amount of an air conditioner 7 is specified, and a heat-source machine 2 is controlled so that cold or hot water at the specified set temperature is supplied, with reference being made to a cold/hot-water-set-temperature-specifying table in which a set temperature of cold or hot water from the heat-source machine 2 and the load-heat amount of the air conditioner 7 are associated.

Description

  The present invention relates to a control device, a control method, a control program, and a recording medium for controlling a heat source device that adjusts the temperature of fluid circulated in an air conditioner, a fan coil unit, and the like in an air conditioning system.

  Conventionally, a heat source device that supplies cold / hot water, a transport device such as a pump that conveys the cold / hot water supplied from the heat source device to an air conditioner, and an air conditioner that adjusts the air conditioning of a predetermined space using the supplied cold / hot water There is an air conditioning system including a machine.

  In recent years, energy saving has been demanded for devices that consume energy such as electric power from an economic and environmental viewpoint. In particular, energy saving is more strongly demanded for air conditioning systems that consume more power than other devices.

  In the conventional air conditioning system, the temperature of the cold / hot water outlet of the heat source machine is often set to be constant. Therefore, even if the load heat amount on the air conditioner side is reduced, the power consumed by the heat source device is not reduced as much as the reduction amount of the load heat amount, resulting in wasted energy. Therefore, an air conditioning system administrator or the like has manually changed the cold / hot water outlet temperature of the heat source machine depending on the season or season.

  However, since there is no standard for the appropriate value of the cold / hot water outlet temperature, it has been difficult to set an optimum temperature for energy saving. Further, since the temperature setting is manually changed, it is difficult to perform fine temperature control in which the setting value is changed every time. Therefore, a technology for automatically controlling the cold / hot water outlet temperature of the heat source machine has been developed so that the energy efficiency is optimized.

  For example, in Patent Document 1, the system power consumption is calculated by summing the power consumption of the local pump of the secondary side equipment, the cold / hot heat source machine, and the primary cold / hot water pump, and the secondary power is calculated from the flow rate and temperature difference of the secondary side equipment. It describes that the amount of heat of the side equipment is calculated, and the outlet temperature of the cold / hot heat source machine is set so that the system COP calculated from the secondary side heat amount and the system power consumption is maximized.

  Patent Document 2 also describes controlling the temperature of the cold / hot water outlet of the cold / hot heat source machine so that the system COP is maximized.

Japanese Patent Laying-Open No. 2006-27597 (released on October 12, 2006) JP 2006-38379 A (published February 9, 2006)

  However, the conventional technology as described above has a problem that it is not easy to introduce it into an existing air conditioning system.

  Specifically, in existing air conditioning systems that have not introduced energy-saving technologies, there are measuring devices that measure the power consumption of local pumps (secondary pumps), cold / heat source units, and primary pumps for secondary equipment. It is not installed. Therefore, when introducing the above-described technology, it is necessary to newly install a power measuring instrument or the like for the existing air conditioning system. In addition, since a new power measuring instrument is installed, the introduction cost also increases. Furthermore, depending on the equipment of the air conditioning system, it may not be possible to install a power meter or the like, and the above-described technology cannot be introduced.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a control device, a control method, a control program, and a cost-effective energy saving in an air conditioning system that can be easily introduced. To realize a recording medium.

  In order to solve the above problems, a control device according to the present invention is a control device that controls a heat source device that adjusts the temperature of a fluid that passes through an air conditioner in an air conditioning system. Temperature acquisition means for acquiring an inflow temperature of the fluid, an outflow temperature of the fluid after passing through the air conditioner, a flow rate acquisition means for acquiring a flow rate of the fluid passing through the air conditioner, and the temperature acquisition means. A heat amount calculating means for calculating the load heat amount of the air conditioner based on the inflow temperature and the outflow temperature acquired by the air flow, and the flow rate acquired by the flow rate acquiring means, and the degree of output of the temperature adjustment of the heat source device The output level specifying the output level corresponding to the load heat quantity calculated by the heat quantity calculation means is referred to the output level specifying information in which the output level indicating the load heat quantity of the air conditioner is associated. And Le specifying means, is characterized in that it comprises a heat source unit control means for controlling the heat source apparatus so as to operate at a power level specified is the output level specifying means.

  In order to solve the above problems, a control method according to the present invention is a control method for controlling a heat source device that adjusts the temperature of a fluid that passes through an air conditioner in an air conditioning system. A temperature acquisition step of acquiring the fluid inflow temperature, an outflow temperature of the fluid after passing through the air conditioner, a flow rate acquisition step of acquiring the flow rate of the fluid passing through the air conditioner, and the temperature acquisition step A calorific value calculating step for calculating a load calorific value of the air conditioner based on the inflow temperature and the outflow temperature acquired in step A, and the flow rate acquired in the flow rate acquiring step, and an output of temperature adjustment of the heat source unit Is calculated in the calorific value calculating step with reference to the output level specifying information in which the output level indicating the degree of the air conditioner is associated with the load calorific value of the air conditioner. An output level specifying step for specifying an output level corresponding to the load heat amount, and a heat source unit control step for controlling the heat source unit to operate at the output level specified in the output level specifying step. Yes.

  Moreover, even if the output level of the heat source unit is changed, the power consumption of the transport system of the air conditioning system does not actually increase so much. Efficiency can be improved.

  According to said structure, the said output level specific | specification means refers to the said output level specific information, The output level corresponding to the load calorie | heat amount of the said air conditioner calculated from the said inflow temperature, the said outflow temperature, and the said flow volume which were acquired Is identified. The heat source unit control means controls the heat source unit so as to operate at the specified output level. Therefore, since the heat source unit operates at an optimum output level corresponding to the load heat amount specified in the output level specifying information, the efficiency of the heat source unit can be improved. Therefore, the efficiency of the entire air conditioning system can be improved, and energy saving can be realized.

  Even in the method of the present invention, a thermometer, a flow meter, and the like are required in order to calculate the load heat amount of the air conditioner. However, in general air conditioning systems, a meter or the like for calculating the load heat amount of the air conditioner is often installed. Therefore, even when the technology of the present invention is introduced into an existing air conditioning system, there is no need to newly install a meter or the like.

  In this way, by using the instruments already installed in the air conditioning system and improving the efficiency of the air conditioning system, it is possible to achieve cost-effective and energy-saving compared to the conventional case, and the existing air conditioning system. There is an effect that the technique of the present invention can be easily introduced to the system.

  In the output level specifying information, it is preferable that the output level and the load heat amount are associated with each other in an increasing relationship, and a predetermined lower limit value is set for the output level.

  According to said structure, according to the increase / decrease in the load calorie | heat amount of the said air conditioner, the output level of the said heat source machine increases / decreases. Therefore, the efficiency of the heat source device can be improved.

  Further, the present inventor shows that the efficiency of the entire air conditioning system is a function proportional to the temperature of the cold / hot water when the temperature of the cold water at the time of cooling is about 15 ° C. or less or the temperature of the hot water at the time of heating is about 35 ° C. or more. I found. Therefore, by setting a predetermined lower limit value for the output level of the heat source machine and operating the heat source machine at the lower limit value or more, the efficiency of the heat source machine can be improved reliably.

  The heat quantity calculation means calculates the load heat quantity by Q = | T2−T1 | × FL, where Q is the load heat quantity, T1 is the inflow temperature, T2 is the outflow temperature, and FL is the flow rate. It is preferable.

  The output level included in the output level specifying information is a set temperature of the fluid supplied by the heat source unit, and the output level specifying means refers to the output level specifying information and the load calculated by the calorific value calculating means. Preferably, a set temperature corresponding to the amount of heat is specified, and the heat source device control means controls the heat source device so as to adjust the temperature of the fluid to the set temperature specified by the output level specifying means.

  The control device may be realized by a computer. In this case, a control program for realizing the control device by the computer by operating the computer as each unit of the control device, and recording the program. Such computer-readable recording media also fall within the scope of the present invention.

  As described above, the control device according to the present invention includes a temperature acquisition unit that acquires the inflow temperature of the fluid before passing through the air conditioner, and the outflow temperature of the fluid after passing through the air conditioner, Based on the flow rate acquisition means for acquiring the flow rate of the fluid passing through the air conditioner, the inflow temperature and the outflow temperature acquired by the temperature acquisition means, and the flow rate acquired by the flow rate acquisition means, the air conditioner With reference to the output level specifying information in which the heat amount calculating means for calculating the load heat amount of the air source, the output level indicating the degree of the temperature adjustment output of the heat source unit, and the load heat amount of the air conditioner are referred to, the heat amount An output level specifying means for specifying an output level corresponding to the load heat quantity calculated by the calculating means, and a heat source machine control means for controlling the heat source machine so as to operate at the output level specified by the output level specifying means. A configuration that includes and.

  The control method according to the present invention includes a temperature acquisition step of acquiring an inflow temperature of the fluid before passing through the air conditioner, an outflow temperature of the fluid after passing through the air conditioner, and the air conditioner. Based on the flow rate acquisition step of acquiring the flow rate of the fluid passing through, the inflow temperature and the outflow temperature acquired in the temperature acquisition step, and the flow rate acquired in the flow rate acquisition step, the air conditioner With reference to the output level specifying information in which the heat amount calculation step for calculating the load heat amount, the output level indicating the degree of output of the temperature adjustment of the heat source unit, and the load heat amount of the air conditioner are referred to, the heat amount calculation An output level specifying step for specifying an output level corresponding to the load heat quantity calculated in the step, and an output level specified in the output level specifying step. And a heat source unit control step of controlling the heat source apparatus so as to operate at the level.

  Therefore, by using the instruments already installed in the air conditioning system and improving the efficiency of the air conditioning system, it is possible to achieve energy saving that is more cost-effective than in the past, and to the existing air conditioning system. On the other hand, there is an effect that the technique of the present invention can be easily introduced.

1, showing an embodiment of the present invention, is a block diagram illustrating a configuration of a main part of a heat source machine control device. FIG. It is a figure which shows an example of a structure of the air conditioning system containing the said heat-source equipment control apparatus. It is a figure which shows an example of the cold water preset temperature specific table stored in the memory | storage part of the said heat-source equipment control apparatus. It is a figure which shows an example of the warm water preset temperature specific table stored in the memory | storage part of the said heat-source equipment control apparatus. It is a sequence diagram which shows a series of operation examples of each apparatus contained in the said air conditioning system. It is a figure which shows an example of the heat-source equipment control process which the said heat-source equipment control apparatus performs.

[Outline of the Invention]
Generally, in an air conditioning system, the power consumption of a heat source device decreases as the temperature of cold water (hot water) rises (decreases), but the flow rate of cold / hot water conveyed to the air conditioner is the same under the condition that the amount of heat of load is the same. Therefore, the power consumption of a transport system such as a pump increases. Therefore, in the prior art, the power consumption of both the heat source device and the conveyance system is measured, and the optimum temperature of the cold / hot water is set by learning from past data.

  In the system in which the chilled / hot water pump adjusts the flow rate according to the load heat amount, the team of the inventors of the present invention increases the temperature of the chilled water supplied by the heat source device when the chilled water temperature is about 15 ° C. or less during cooling. Even in this case, the flow rate of cold water poured by the cold / hot water pump does not increase so much. In addition, in the case of heating, if the temperature of the hot water is about 35 ° C. or higher, the flow rate of the hot water injected by the cold / hot water pump does not increase so much even if the temperature of the hot water supplied by the heat source device is lowered. .

  Therefore, the present inventor found that the efficiency of the entire air conditioning system is a function proportional to the temperature of the cold / hot water when the temperature of the cold water at the time of cooling is about 15 ° C. or less or the temperature of the hot water at the time of heating is about 35 ° C. or more. I found out that Based on this knowledge, the present inventor provides a method for realizing energy saving without measuring the power consumption of the air conditioning system by providing an upper limit value and a lower limit value for the temperature of the cold water supplied by the heat source device. Was invented.

  In general air conditioning systems, the upper limit value of the cold water temperature during cooling is often set to 15 ° C., and the lower limit value of the hot water temperature during heating is often set to 35 ° C. Therefore, there is no problem even if the upper limit value of the cold water temperature and the lower limit value of the hot water temperature are limited to 15 ° C. and 35 ° C., respectively.

  Even in the method of the present invention, a thermometer, a flow meter, and the like are required in order to calculate the load heat amount of the air conditioner. However, in general air conditioning systems, a meter or the like for calculating the load heat amount of the air conditioner is often installed. Therefore, even when the technology of the present invention is introduced into an existing air conditioning system, there is no need to newly install a meter or the like.

  As described above, by using the instrument installed in the existing air conditioning system, the present invention can achieve cost-effective and energy saving compared to the conventional system, The technique of the present invention can be easily introduced.

  Hereinafter, a specific embodiment of the present invention will be described with reference to FIGS. First, the air conditioning system according to the present embodiment will be described with reference to FIG. In the present invention, the flow rate indicates a flow rate per unit time. In the embodiment described below, the upper limit value of the cold water temperature is set to 15 ° C., and the lower limit value of the hot water temperature is set to 35 ° C., but these values are not limited to strict values. The critical value of the temperature when the efficiency of the entire air conditioning system is a function proportional to the temperature of the cold / hot water slightly varies depending on the state and type of the equipment of the air conditioning system, the environment in which the air conditioning system is installed, and the like. In the present invention, the upper limit value of the cold water temperature is set to 15 ° C., and the lower limit value of the hot water temperature is set to 35 ° C., but these temperatures are substantially values including the above-described fluctuation range. Specifically, the upper limit value of the cold water temperature is 15 ° C. ± 2 ° C., and the lower limit value of the hot water temperature is 35 ° C. ± 2 ° C.

[Configuration of air conditioning system]
FIG. 2 is a diagram illustrating an example of the configuration of the air conditioning system. As shown in FIG. 2, the air conditioning system 10 includes a heat source device control device (control device) 1, heat source devices 2 a and 2 b, cold / hot water primary pumps 3 a and 3 b, cold / hot water secondary pumps 4 a and 4 b, and an air conditioner ( AHU (Air Handling Unit) 7 is included.

  The heat source units 2a and 2b, the cold / hot water primary pumps 3a and 3b, the cold / hot water secondary pumps 4a and 4b, and the air conditioner 7 are connected via a water pipe and a header, respectively. Cold and hot water circulates. In the present embodiment, cold / hot water circulates between the devices in the air conditioning system, but the present invention is not limited to this, and any fluid may be used. For example, it may be a liquid other than water or a gas such as air.

  Specifically, as shown in the figure, the outflow sides of the cold / hot water primary pumps 3a and 3b are connected to the inflow sides of the heat source units 2a and 2b through water distribution pipes, respectively. Moreover, the inflow side of the cold / hot water primary pumps 3a and 3b is connected with the return water header 11a by the water pipe. The outflow sides of the heat source units 2a and 2b are connected to the water injection primary header 11b by a water pipe.

  Moreover, the water injection primary header 11b is connected with the water injection secondary header 11c by the water pipe. Moreover, the inflow side of the cold / hot water secondary pumps 4a and 4b is connected by the water injection secondary header 11c and the water distribution pipe, and the outflow side is connected by the water injection tertiary header 11d by the water distribution pipe.

  Moreover, the inflow side of the air conditioner 7 is connected by the water injection tertiary header 11d and the water pipe, and the outflow side is connected by the return water header 11a and the water pipe.

  Furthermore, a flow meter 6 and an outlet thermometer 5b are provided on the water distribution pipe between the air conditioner 7 and the water injection tertiary header 11d. Moreover, the inlet thermometer 5a is provided on the water distribution pipe between the air conditioner 7 and the return water header 11a.

  Hereinafter, when the heat source devices 2a and 2b are not distinguished, the heat source devices 2a and 2b are collectively referred to as the heat source device 2. When the cold / hot water primary pumps 3a and 3b are not distinguished, the cold / hot water primary pumps 3a and 3b are collectively referred to as the cold / hot water primary pump 3. When the cold / hot water secondary pumps 4a and 4b are not distinguished, the cold / hot water secondary pumps 4a and 4b are collectively referred to as the cold / hot water secondary pump 4.

  The heat source device control apparatus 1 acquires the inlet temperature data, the outlet temperature data, and the flow rate data from the inlet thermometer 5a, the outlet thermometer 5b, and the flow meter 6, respectively, and supplies the heat source device 2 based on the acquired data. The operation of the heat source device 2 is controlled so that the cold / hot water to be heated has a predetermined temperature. Details of the function and processing of the heat source machine control device 1 will be described later.

  The heat source device 2 heats or cools the cold / hot water conveyed by the cold / hot water primary pump 3 based on the instruction | indication of the heat source device control apparatus 1, and supplies the cold / hot water of predetermined temperature. The heat source device 2 may be anything as long as it can heat or cool cold / hot water, and the system may be any system such as an absorption system, a turbo system, or a heat pump system. Moreover, the heat source device 2 may be composed of a refrigerator that generates cold water and a boiler that generates hot water.

  The cold / hot water primary pump 3 conveys the cold / hot water flowing out from the air conditioner 7 to the air conditioner 7 through the heat source device 2. Specifically, for example, a pressure gauge (not shown) that measures the pressure of cold / hot water passing through the primary water injection header 11b is installed, and the operation of the cold / hot water primary pump 3 is controlled based on the measurement result of the pressure gauge. Assume that a primary pump control device (not shown) is installed. In this case, the cold / hot water primary pump 3 adjusts the flow volume of the cold / hot water conveyed so that the pressure of the cold / warm water passing through the water injection primary header 11b becomes a predetermined value according to the instruction of the primary pump control device.

  The cold / hot water secondary pump 4 adjusts the flow volume of the cold / hot water flowing into the air conditioner 7 from the water injection tertiary header 11d. Specifically, for example, a pressure gauge (not shown) that measures the pressure of cold / hot water passing through the water injection tertiary header 11d is installed, and the operation of the cold / hot water secondary pump 4 is performed based on the measurement result of the pressure gauge. Assume that a secondary pump control device (not shown) to be controlled is installed. In this case, the cold / hot water secondary pump 4 adjusts the flow rate of the cold / hot water to be conveyed so that the pressure of the cold / warm water passing through the water injection tertiary header 11d becomes a predetermined value according to the instruction of the secondary pump control device.

  The air conditioner 7 adjusts the degree of opening and closing of the control valve 9, changes the flow rate of the cold / hot water passing through the air conditioner 7, and supplies the air conditioned by the cold / hot water to the living room (SA: Send Air). Is. Specifically, for example, when the user operates the remote controller to raise the set temperature of the air conditioner 7 during cooling, the air conditioner 7 closes the control valve and decreases the flow rate of the cold / hot water passing through the air conditioner 7. Let On the other hand, when the user operates the remote controller to lower the set temperature of the air conditioner 7 during cooling, the air conditioner 7 opens the control valve to increase the flow rate of the cold / hot water passing through the air conditioner 7.

  The inlet thermometer 5a measures the temperature (outflow temperature) of cold / hot water that flows out of the air conditioner 7 and flows into the return water header 11a. The inlet thermometer 5a outputs inlet temperature data indicating the measured temperature of the cold / hot water to the heat source apparatus control device 1. Here, the temperature of the cold / warm water flowing out from the air conditioner 7 and flowing into the return water header 11a measured by the inlet thermometer 5a is defined as T1.

  The outlet thermometer 5b measures the temperature (inflow temperature) of cold / warm water flowing out from the water injection tertiary header 11d and flowing into the air conditioner 7. The outlet thermometer 5 b outputs outlet temperature data indicating the measured temperature of the cold / hot water to the heat source apparatus control device 1. Here, the temperature of the cold / hot water flowing out from the water injection tertiary header 11d and flowing into the air conditioner 7 measured by the outlet thermometer 5b is defined as T2.

  The flow meter 6 measures the flow rate of cold / hot water flowing out from the water injection tertiary header 11d and flowing into the air conditioner 7. The flow meter 6 outputs flow rate data indicating the flow rate of the measured cold / hot water to the heat source device control device 1. Here, let FL be the flow rate of the cold / warm water flowing out from the water injection tertiary header 11d and flowing into the air conditioner 7 as measured by the flow meter 6.

  In the example shown in FIG. 2, the air conditioning system 10 includes two sets of the cold / hot water primary pump 3 and the heat source unit 2, but is not limited thereto. For example, the air conditioning system 10 may include only one set of the cold / hot water primary pump 3 and the heat source unit 2 or may include three or more sets.

  Moreover, in the example shown in FIG. 2, although the air conditioning system 10 contains the two cold / hot water secondary pumps 4, it is not restricted to this. For example, the air conditioning system 10 may include one cold / hot water secondary pump 4 or may include three or more. In addition, the air conditioning system 10 may not include the cold / hot water secondary pump 4. In this case, cold / hot water is circulated in the air conditioning system only by the cold / hot water primary pump 3.

  Moreover, in the example shown in FIG. 2, although the air conditioning system 10 contains one air conditioner 7, it does not restrict to this. For example, the air conditioning system 10 may include a plurality of air conditioners 7. In this case, the cold / hot water secondary pump 4 may be installed according to the number of the air conditioners 7.

  Moreover, in the example shown in FIG. 2, although the exit thermometer 5b is installed in the water distribution pipe between the water injection tertiary header 11d and the air conditioner 7, it is not restricted to this. For example, the outlet thermometer 5b may be installed in a water distribution pipe between the water injection primary header 11b and the water injection secondary header 11c.

[Configuration of heat source unit control device]
Next, the heat source machine control apparatus 1 is demonstrated based on FIG. FIG. 1 is a block diagram illustrating an example of a configuration of a main part of the heat source machine control device 1. As shown in FIG. 1, the heat source machine control device 1 includes a control unit 21, a storage unit 22, a data input unit 23, and a signal output unit 24. The heat source machine control device 1 is realized by, for example, a PC.

  The data input unit 23 is connected to the inlet thermometer 5a, the outlet thermometer 5b, and the flow meter 6, and is an input interface for receiving data from the inlet thermometer 5a, the outlet thermometer 5b, and the flow meter 6. . The data input unit 23 is connected to the inlet thermometer 5a, the outlet thermometer 5b, and the flow meter 6 by wired communication means or wireless communication means, respectively.

  The signal output unit 24 is connected to the heat source unit 2 and is an output interface for transmitting a control signal to the heat source unit 2. The signal output unit 24 is connected to the heat source device 2 by wired communication means or wireless communication means.

  The control unit 21 performs various calculations by executing a program read from the storage unit 22 to a temporary storage unit (not shown), and comprehensively controls each unit included in the heat source machine control device 1. It is.

  In the present embodiment, the control unit 21 includes, as functional blocks, a data acquisition unit (temperature acquisition unit, flow rate acquisition unit) 31, a heat amount calculation unit (heat amount calculation unit) 32, and a cold / hot water set temperature specification unit (output level specification unit). 33 and a heat source device control unit (heat source device control means) 34. Each functional block (31 to 34) of the control unit 21 includes a CPU (central processing unit) that stores a program stored in a storage device realized by a ROM (read only memory) or the like (RAM (random access memory)). This can be realized by reading out and executing the temporary storage unit realized by the above.

  The data acquisition unit 31 acquires the inlet temperature data, the outlet temperature data, and the flow rate data from the inlet thermometer 5a, the outlet thermometer 5b, and the flow meter 6 via the data input unit 23, respectively. The data acquisition unit 31 acquires each data, for example, every hour. The data acquisition unit 31 outputs the acquired inlet temperature data, outlet temperature data, and flow rate data to the heat quantity calculation unit 32.

  The heat quantity calculation unit 32 calculates the load heat quantity of the air conditioner 7 based on the inlet temperature data, the outlet temperature data, and the flow rate data acquired by the data acquisition unit 31. Specifically, the heat quantity calculation unit 32 calculates the load heat quantity Q of the air conditioner 7 as Q = | T2-T1 | × FL. The heat quantity calculation unit 32 outputs the calculated load heat quantity Q of the air conditioner 7 to the cold / hot water set temperature specifying unit 33.

  The cold / hot water set temperature specifying unit 33 acquires the load heat quantity from the heat quantity calculating unit 32, and reads a cold / hot water set temperature specifying table (details will be described later) from the storage unit 22. The chilled / hot water set temperature specifying unit 33 refers to the read chilled / hot water set temperature specifying table to specify the chilled / hot water set temperature corresponding to the acquired load heat quantity Q. The cold / hot water set temperature specifying unit 33 outputs the specified cold / hot water set temperature to the heat source unit control unit 34.

  For example, when the air conditioner 7 is operating as cooling, the cold / hot water set temperature specifying unit 33 reads the cold water set temperature specifying table from the storage unit 22 and further loads the maximum load heat amount CQmax during cooling of the air conditioner 7. A load heat quantity ratio CQR, which is a ratio of the heat quantity Q, is calculated. The cold / hot water set temperature specifying unit 33 specifies the cold water set temperature corresponding to the calculated load heat quantity ratio CQR with reference to the cold water set temperature specifying table.

  Moreover, when the air conditioner 7 is operating as heating, the cold / hot water set temperature specifying unit 33 reads the hot water set temperature specifying table from the storage unit 22, and further loads the maximum load heat amount HQmax during heating of the air conditioner 7. A load heat quantity ratio HQR, which is a ratio of the heat quantity Q, is calculated. The cold / hot water set temperature specifying unit 33 specifies the hot water set temperature corresponding to the calculated load heat quantity ratio HQR with reference to the hot water set temperature specifying table.

  The heat source machine control unit 34 generates a heat source machine control signal instructing to supply cold / hot water having the cold / hot water set temperature specified by the cold / hot water set temperature specifying part 33, and sends the generated heat source machine control signal to the heat source machine 2. The signal is transmitted via the signal output unit 24.

  The storage unit 22 stores programs, data, and the like referred to by the control unit 21, and stores, for example, the above-described cold / hot water set temperature specifying table 41 and the like. The cold / hot water set temperature specifying table 41 may include a cold water set temperature specifying table and a hot water set temperature specifying table.

  An example of the cold / hot water set temperature specifying table 41 stored in the storage unit 22 will be described with reference to FIGS. 3 and 4. FIG. 3 is a diagram illustrating an example of the cold water set temperature specifying table stored in the storage unit 12. FIG. 4 is a diagram illustrating an example of a hot water set temperature specifying table stored in the storage unit 12.

  First, the cold water set temperature specifying table shown in FIG. 3 will be described. As shown in FIG. 3, in the cold water set temperature specifying table, a load heat quantity ratio CQR, which is a ratio of the load heat quantity Q to the maximum load heat quantity CQmax during cooling of the air conditioner 7, is associated with the cold water set temperature. It is. In the example shown in FIG. 3, the cold water set temperature specifying table is represented by a function indicating the correspondence relationship between the load heat quantity ratio CQR and the cold water set temperature. In the cold water set temperature specifying table shown in FIG. 3, the cold water set temperature increases as the load heat quantity ratio decreases. That is, as shown in FIG. 3, when the X-axis is the load heat quantity ratio and the Y-axis is the chilled water set temperature, the chilled water set temperature specifying table is a downward-sloping graph.

  In the example of the cold water set temperature specifying table shown in FIG. 3, it is assumed that the cold water set temperature during cooling is set as 7 ° C. as the design value of the air conditioning system. In addition, it is assumed that the maximum load heat amount CQmax during cooling of the air conditioner 7 is also a value determined in advance as a design value of the air conditioning system.

  In the example shown in FIG. 3, the cold water set temperature changes linearly when the load heat quantity ratio CQR is 25% to 120%. Further, when the load heat quantity ratio CQR is 25% or less, it is determined that the cooling load is extremely low, and when the load heat quantity ratio CQR is 25% or less, the cold water set temperature is 15 ° C. That is, the upper limit value of the cold water set temperature is set to 15 ° C. The lower limit value of the cold water set temperature is 5 ° C., and the cold water set temperature is 5 ° C. when the load heat quantity ratio CQR is 120% or more. In addition, 15 degreeC is an upper limit of the cold water preset temperature of the general heat source machine at the time of air_conditioning | cooling.

  However, the cold water set temperature specifying table is not limited to the function shown in FIG. In the cold water set temperature specification table, if the upper limit value of the cold water set temperature is 15 ° C. or less and the cold water set temperature rises (decreases) as the load heat amount decreases (increases), the correspondence relationship is There may be. For example, the relationship between the load heat quantity and the cold water set temperature may be nonlinear. Further, the value corresponding to the cold water set temperature may be an absolute value of the load heat amount instead of the load heat amount ratio. The output level can also be provided based on other management conditions calculated so that the use of energy is rational based on the basic unit of energy use facilities, the total basic unit of energy of buildings, and the like.

  Next, the hot water set temperature specifying table shown in FIG. 4 will be described. As shown in FIG. 4, in the hot water set temperature specifying table, a load heat quantity ratio HQR that is a ratio of the load heat quantity Q to the maximum load heat quantity HQmax during heating of the air conditioner 7 is associated with the hot water set temperature. It is. In the example shown in FIG. 4, the hot water set temperature specifying table is represented by a function indicating a correspondence relationship between the load heat quantity ratio HQR and the hot water set temperature. In the hot water set temperature specifying table shown in FIG. 4, the hot water set temperature decreases as the load heat quantity ratio decreases. That is, as shown in FIG. 4, when the X-axis is the load heat quantity ratio and the Y-axis is the hot water set temperature, the hot water set temperature specifying table is a graph that goes upward.

  In the example of the hot water set temperature specifying table shown in FIG. 4, it is assumed that the hot water set temperature during heating is set as 45 ° C. as the design value of the air conditioning system. Further, it is assumed that the maximum load heat amount HQmax during heating of the air conditioner 7 is also a value determined in advance as a design value of the air conditioning system.

  In the example shown in FIG. 4, the hot water set temperature changes linearly when the load heat quantity ratio HQR is 25% to 120%. Further, when the load heat quantity ratio HQR is 25% or less, it is determined that the heating load is extremely low. When the load heat quantity ratio HQR is 25% or less, the hot water set temperature is set to 35 ° C. That is, the lower limit value of the hot water set temperature is set to 35 ° C. Further, the upper limit value of the hot water set temperature is 55 ° C., and the hot water set temperature is 55 ° C. when the load heat quantity ratio HQR is 120% or more. In addition, 35 degreeC is a lower limit of the warm water preset temperature of the general heat source machine at the time of heating.

  However, the hot water set temperature specifying table is not limited to the function shown in FIG. In the hot water set temperature specification table, if the lower limit value of the hot water set temperature is 35 ° C. or less and the hot water set temperature decreases (increases) as the load heat amount decreases (increases), any correspondence relationship is established. There may be. For example, the relationship between the load heat amount and the hot water set temperature may be nonlinear. Further, the value corresponding to the hot water set temperature may be an absolute value of the load heat amount instead of the load heat amount ratio.

  In summary, the cold / hot water set temperature identification table 41 is information in which the output level indicating the degree of output of the temperature adjustment of the heat source device 2 and the load heat amount of the air conditioner 7 are associated with each other in a monotonically increasing relationship. This is output level specifying information in which a predetermined lower limit is set for the output level. At this time, the cold / hot water set temperature specifying unit 33 refers to the output level specifying information, specifies the output level corresponding to the load heat amount calculated by the heat quantity calculation unit 32, and the heat source device control unit 34 sets the cold / hot water set temperature. The heat source device 2 is controlled so that the specifying unit 33 operates at the specified output level.

  For example, when the output level specified by the cold / hot water set temperature specifying unit 33 is low, the heat source unit control unit 34 controls the heat source unit 2 to operate at a low output level, that is, during cooling, the temperature is high. The heat source device 2 is controlled so as to supply cold water, and the heat source device 2 is controlled so as to supply hot water having a low temperature during heating. On the other hand, when the output level specified by the cold / hot water set temperature specifying unit 33 is high, the heat source unit control unit 34 controls the heat source unit 2 so as to operate at a high output level. The heat source device 2 is controlled so as to supply cold water, and the heat source device 2 is controlled so as to supply hot water having a high temperature during heating.

  That is, the lower limit value of the output level corresponds to 15 ° C. which is the upper limit value of the cold water set temperature during cooling, and corresponds to 35 ° C. which is the lower limit value of the hot water set temperature during heating.

[Operation example of each device of the air conditioning system]
Next, operation | movement of each apparatus of the air conditioning system 10 is demonstrated based on FIG. FIG. 5 is a sequence diagram illustrating a series of operation examples of each device of the air conditioning system 10. Here, it is assumed that the air conditioner 7 is operating in cooling.

  As shown in FIG. 5, first, a user in the living room 8 operates a remote controller or the like to increase the set temperature of the air conditioner 7 (S1). The air conditioner 7 receives the set temperature relaxation instruction, and closes the control valve 9 based on the instruction (S2).

  When the air conditioner 7 closes the control valve 9, the pressure in the water injection tertiary header 11d increases (S3). The cold / hot water secondary pump 4 reduces the flow volume of the cold / hot water conveyed to the air conditioner 7 in order to keep the pressure in the water injection tertiary header 11d constant (S4). Thereby, the flow volume which the flow meter 6 measures decreases (S5).

  Here, the heat source machine control device 1 executes a heat source machine control process (details will be described later) (S6), and transmits a control signal to the heat source machine 2 (S7). Here, the heat source unit 2 is instructed to increase the cold water set temperature. The heat source device 2 receives the control signal from the heat source device control device 1, and raises the temperature of the supplied cold water according to the control signal (S8).

[Heat source machine control processing]
Next, the heat source unit control process executed by the heat source unit control device 1 in S6 of FIG. 5 will be described based on FIG. FIG. 6 is a diagram illustrating an example of a heat source machine control process executed by the heat source machine controller 1. Here, it is assumed that the cold water set temperature specifying table and the hot water set temperature specifying table shown in FIGS. 3 and 4 are stored as the cold / hot water set temperature specifying table 41 in the storage unit 22.

  As shown in FIG. 6, first, the data acquisition unit 31 acquires the inlet temperature data, the outlet temperature data, and the flow rate data from the inlet thermometer 5a, the outlet thermometer 5b, and the flow meter 6 via the data input unit 23, respectively. (S11). Next, the calorie | heat amount calculation part 32 calculates the load calorie | heat amount Q of the air conditioner 7 using each acquired data (S12). As described above, since the flow rate measured by the flow meter 6 is decreased, the load heat quantity Q is also decreased.

  The cold / hot water set temperature specifying unit 33 acquires the load heat quantity Q from the heat quantity calculating unit 32, and further reads the cold water set temperature specifying table from the storage unit 22. The cold / hot water set temperature specifying unit 33 calculates the load heat quantity ratio CQR from the load heat quantity Q, and specifies the cold water set temperature corresponding to the calculated load heat quantity ratio CQR in the cold water set temperature specification table (S13). Here, since the load heat quantity Q has decreased, the cold water set temperature specified by the cold / hot water set temperature specifying unit 33 is higher than the current cold water set temperature.

  And the heat source machine control part 34 transmits the heat source machine control signal which instruct | indicates to produce | generate the cold water of the specified cold water preset temperature with respect to the heat source machine 2 (S14). That is, the heat source device control unit 34 instructs to increase the temperature of the cold water supplied to the heat source device 2.

  Thus, the heat source efficiency of the heat source device 2 is improved by increasing the temperature of the cold water supplied by the heat source device 2 in accordance with the decrease in the load heat quantity Q. The amount of heat supplied to the room 8, that is, the load heat amount Q is calculated by the temperature difference × flow rate, and therefore the flow rate does not change if the temperature difference is constant. By raising the cold water set temperature, the temperature of the cold water flowing out of the air conditioner 7 also rises. Therefore, it is assumed that the humidity in the living room 8 increases (decrease in the dehumidifying capacity of the air conditioner 7). However, if the upper limit value of the cold water set temperature is set to 15 ° C. or less, there is no practical problem.

  The heat source machine control device 1 executes the heat source machine control process at predetermined time intervals such as every hour. Not limited to this, the data acquired by the data acquisition unit 31 is recorded in the storage unit 22 as a history, and when the flow rate FL or the load heat quantity Q changes by a predetermined value (or a predetermined ratio) or more, The set temperature specifying unit 33 and the heat source machine control unit 34 may execute processing.

[Supplement]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  Finally, each block of the heat source device control apparatus 1, in particular, the control unit 21 may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the heat source controller 1 includes a central processing unit (CPU) that executes instructions of a control program that realizes each function, a read only memory (ROM) that stores the program, and a random access memory (RAM) that expands the program. ), A storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of the heat source machine control device 1 which is software for realizing the above-described functions is recorded so as to be readable by a computer. Can also be achieved by reading the program code recorded on the recording medium and executing it by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Moreover, the heat source machine control apparatus 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  INDUSTRIAL APPLICABILITY The present invention can be used for an air conditioning system that adjusts the air conditioning of a predetermined space using the amount of heat of fluid.

1 Heat source machine control device (control device)
2 Heat source machine 7 Air conditioner 10 Air conditioning system 31 Data acquisition part (temperature acquisition means, flow rate acquisition means)
32 Calorie calculation part (calorie calculation means)
33 Cold / hot water set temperature specifying part (output level specifying means)
34 Heat source machine control unit (heat source machine control means)

Claims (7)

In the air conditioning system, a control device that controls a heat source device that adjusts the temperature of the fluid that passes through the air conditioner,
Temperature acquisition means for acquiring the inflow temperature of the fluid before passing through the air conditioner and the outflow temperature of the fluid after passing through the air conditioner;
Flow rate acquisition means for acquiring the flow rate of the fluid passing through the air conditioner;
A calorific value calculating means for calculating a load heat quantity of the air conditioner based on the inflow temperature and the outflow temperature acquired by the temperature acquiring means and the flow rate acquired by the flow rate acquiring means;
The output corresponding to the load heat amount calculated by the heat amount calculation means with reference to the output level specifying information in which the output level indicating the degree of output of the temperature adjustment of the heat source unit and the load heat amount of the air conditioner are referred to Output level specifying means for specifying the level;
And a heat source unit control unit for controlling the heat source unit so that the output level specifying unit operates at the specified output level.   The output level specifying information is such that the output level and the load heat amount are associated with each other in an increasing relationship, and a predetermined lower limit is set for the output level. The control apparatus according to 1.   The heat quantity calculation means calculates the load heat quantity by Q = | T2−T1 | × FL, where Q is the load heat quantity, T1 is the inflow temperature, T2 is the outflow temperature, and FL is the flow rate. The control device according to claim 1, wherein the control device is a control device. The output level included in the output level specifying information is a set temperature of the fluid supplied by the heat source unit,
The output level specifying means specifies the set temperature corresponding to the load heat amount calculated by the heat amount calculating means with reference to the output level specifying information,
The heat source device control means controls the heat source device so as to adjust the temperature of the fluid to the set temperature specified by the output level specifying means. The control device described. In the air conditioning system, a control method for controlling a heat source device that adjusts the temperature of the fluid that passes through the air conditioner,
A temperature acquisition step of acquiring an inflow temperature of the fluid before passing through the air conditioner and an outflow temperature of the fluid after passing through the air conditioner;
A flow rate obtaining step for obtaining a flow rate of the fluid passing through the air conditioner;
A calorific value calculating step of calculating a load heat amount of the air conditioner based on the inflow temperature and the outflow temperature acquired in the temperature acquisition step and the flow rate acquired in the flow rate acquisition step;
The output level specifying information in which the output level indicating the degree of the temperature adjustment output of the heat source unit and the load heat amount of the air conditioner is referred to correspond to the load heat amount calculated in the heat amount calculation step. An output level specifying step for specifying an output level;
A heat source unit control step for controlling the heat source unit to operate at the output level specified in the output level specifying step.   A control program for operating the control device according to any one of claims 1 to 4, wherein the control program causes a computer to function as each of the means.   A computer-readable recording medium on which the control program according to claim 6 is recorded.

Images