JP7438831B2 - Air conditioning control device, air conditioning control method, and program - Google Patents

Description

The present invention relates to an air conditioning control device, an air conditioning control method, and a program.

Heat source equipment is operated outside of the hours when air conditioning is required to store heat in the building frame in order to create a target thermal environment indoors from the start of air conditioning using air conditioners and to cut peak air conditioning loads. It is known to perform a heat storage operation in which the fuel cell is kept in a cool state (see, for example, Patent Document 1).

Patent No. 4418885

However, in heat storage operation, since the frame in contact with the indoor environment is used as a heat storage material, heat is radiated from the frame at the same time as heat is stored. For this reason, unlike a thermal storage air conditioning system provided with a thermal storage tank, it is difficult to grasp the amount of heat storage under thermal storage operation, and it is difficult to determine how much time is required for thermal storage operation.

Therefore, an object of the present invention is to take the above-mentioned problems into consideration and make it possible to appropriately determine the time required for heat storage operation.

One aspect of the present invention that solves the above-mentioned problem is to set a target temperature that is a target room temperature at a timing corresponding to the end of a heat storage operation in which heat is stored in a building frame by a heat source device, and a target temperature that is a target room temperature at a timing corresponding to the end of a heat storage operation in which heat is stored in a building frame by a heat source device, and a The frame processing load indicating the heat load that the frame should handle during the usage time and the outside temperature corresponding to the usage time are input as the first parameters, and by a predetermined first calculation using the input first parameters, A target building body temperature at a timing corresponding to the end of the heat storage operation is calculated, and the calculated target building body temperature, the building body temperature corresponding to the current time, and the medium temperature supplied from the heat source equipment according to heat storage in the building body are calculated. The air conditioning control device includes a heat storage operation time calculation unit that is input as a second parameter and calculates the heat storage operation time required for the heat storage operation by a predetermined second calculation using the input second parameter.

Further, one aspect of the present invention provides a target temperature that is a target room temperature at a timing corresponding to the end of a heat storage operation in which heat is stored in a building frame by a heat source device, and a usage time during which the building is used by a user. The frame processing load indicating the heat load to be processed by the frame and the outside temperature corresponding to the usage time are input as the first parameters, and the heat storage operation is terminated by a predetermined first calculation using the input first parameters. The target building body temperature at the timing corresponding to the current time is calculated, and the calculated target building body temperature, the building body temperature corresponding to the present time, and the medium temperature supplied from the heat source device according to the heat storage in the building body are used as second parameters. The air conditioning control method includes a step of calculating a heat storage operation time required for the heat storage operation by inputting and performing a predetermined second calculation using the input second parameter.

Further, one aspect of the present invention is to set a computer as an air conditioning control device to a target temperature that is a target room temperature at a timing corresponding to the end of a heat storage operation in which heat is stored in a building frame using a heat source device, and a target temperature that is a target room temperature at a timing corresponding to the end of a heat storage operation in which a The frame processing load indicating the heat load that the frame should handle during the usage time when the object is used and the outside temperature corresponding to the usage time are input as the first parameters, and a predetermined first parameter using the input first parameter is input. By the calculation, the target body temperature at the timing corresponding to the end of the heat storage operation is calculated, and the temperature is supplied from the heat source equipment according to the calculated target body temperature, the body temperature corresponding to the current time, and the heat storage in the body This is a program for functioning as a heat storage operation time calculation unit that inputs the medium temperature as a second parameter and calculates the heat storage operation time required for heat storage operation by performing a predetermined second calculation using the input second parameter. .

As described above, according to the present invention, it is possible to appropriately determine the time required for heat storage operation.

It is a diagram showing an example of the configuration of an air conditioning control system in a first embodiment. 1 is a diagram showing a configuration example of an air conditioning control device according to a first embodiment; FIG. It is a flowchart which shows the example of a process procedure which the air-conditioning control apparatus of 1st Embodiment performs corresponding to calculation of heat storage operation time. FIG. 3 is a diagram showing calculated parameters according to the first embodiment by classification. It is a figure which shows the example of the calculation result of the heat storage operation time of 1st Embodiment by the relationship between slab temperature and cold/hot water temperature. 12 is a flowchart illustrating an example of a processing procedure executed by the coefficient deriving unit of the second embodiment in response to calculation of coefficients. It is a figure which shows an example of load calculation evaluation in 2nd Embodiment. It is a figure which shows the result of thermal network calculation in 2nd Embodiment. It is a figure which shows the modification of the structure of the air conditioning system in embodiment. It is a figure which shows the modification of the structure of the air conditioning system in embodiment. It is a figure which shows the modification of the structure of the air conditioning system in embodiment.

<First embodiment>
[Example of air conditioning system configuration]
FIG. 1 shows a configuration example of an air conditioning system that is controlled by an air conditioning control device in this embodiment. The following explanation will be based on an example in which air conditioning is mainly performed for cooling.
The air conditioning system shown in the figure air-conditions a living room 1a of a building 1. The air conditioning system in the figure includes an underground heat exchanger 20 and a heat exchanger 30 as air conditioning equipment.

The underground heat exchanger 20 functions as a heat source using natural energy, and is a device installed underground in the ground GD to extract geothermal heat as a heat source. The underground heat exchanger 20 includes a U-tube buried underground to a depth of several hundred meters, for example. Cold heat (or heat) is generated in the U-tube due to the temperature depending on the geothermal heat.
The heat exchanger 30 is configured to include, for example, a pump, and produces cold water (or hot water) by transferring the heat of the U tube to the water supplied to itself and supplying the heat to the cold/hot water pipe.
The underground heat exchanger 20 in this embodiment is used as a heat source device for storing heat in the frame of the building 1 during a heat storage operation performed before air conditioning time.

The slab 2 forms a ceiling surface in the living room 1a. The slab 2 has beams 2a formed in, for example, a lattice shape. For example, cold and hot water pipes (not shown), which are thermal energy media, are attached to the slab 2 so as to form a predetermined flow path pattern. A radiation panel (radiation fin) 2b is attached to the cold and hot water pipe via a heat sink (not shown) as a heat exchange member.

The cold water produced by the heat exchanger 30 using the cold heat of the underground heat exchanger 20 is supplied to the cold and hot water pipe, and the heat of the cold water transmitted from the cold and hot water pipe is transmitted to the living room 1a by the radiant panel. heat is dissipated and heat is stored in the slab 2 (framework).
In this way, in the air conditioning system of this embodiment, air conditioning using the underground heat exchanger 20 as a heat source by operating the heat exchanger 30 is possible.

[About heat storage operation]
The air conditioning system of this embodiment air-conditions the living room 1a by operating the air-cooling heat pump 10, for example, during a time period (air conditioning time) when a user is present in the living room 1a.
In addition, the air conditioning system of the present embodiment performs a heat storage operation in which heat (cold heat may be used) of the frame such as the slab 2 is accumulated during a time period other than the air conditioning time period.
In the description of this embodiment, the air conditioning during the air conditioning time will be referred to as "main air conditioning", and if it includes main air conditioning and heat storage operation, or if there is no particular distinction between main air conditioning and heat storage operation, it will be simply referred to as "main air conditioning". "Air conditioning".

By heat storage operation, for example, the temperature of the living room 1a can be controlled to a predetermined target temperature corresponding to the start of main air conditioning (startup), so the peak of heat load at the start of main air conditioning can be reduced. In the heat storage operation of this embodiment, the underground heat exchanger 20 is used as a heat source.

The air conditioning system of this embodiment includes an air conditioning control device. The air conditioning control device performs control related to air conditioning in the building 1. That is, the air conditioning control device controls the air conditioning equipment and performs control corresponding to air conditioning such as main air conditioning and heat storage operation.

Here, the heat storage operation is performed during a time period when main air conditioning is not performed (for example, from 22:00 to 8:00). The heat storage operation is performed for the purpose of bringing the thermal environment, such as the temperature of the building frame or the living room, to a predetermined target value at the end of the heat storage operation. If the thermal environment matches the target value at the end of the heat storage operation, the main air conditioning that will continue to be performed can be started with a small heat load, which is advantageous for energy saving, for example.

However, the time required for such heat storage operation (thermal storage operation time) may vary depending on weather conditions, usage conditions (number of users, length of time users use (stay) in the building, etc.) and the time when main air conditioning is not operated. For this reason, for example, when an operation manager wants to perform heat storage operation, it is difficult for him or her to set an appropriate heat storage operation time.

For example, if heat storage operation is performed without setting the heat storage operation time appropriately, the system will be in a state of excessive cooling (overcooling) or excessive heating (overheating) at the end of heat storage operation. there is a possibility. In this case, when the main air conditioner starts up after the end of the heat storage operation, air conditioning is performed in accordance with a large heat load, resulting in wasteful energy consumption. Furthermore, when the main air conditioner is turned on, the thermal environment may not be comfortable for the user.

Therefore, in order to appropriately determine the time required for heat storage operation, the air conditioning control device of this embodiment is configured to be able to calculate an appropriate heat storage operation time as described below.

[Example of configuration of air conditioning control device]
FIG. 2 shows a configuration example of the air conditioning control device 100 of this embodiment. In the figure, devices and devices included in the air conditioning system together with the air conditioning control device 100 include a heat exchanger 30, slab temperature sensors SN1 (SN1-1 to SN1-21), and room temperature sensors SN2 (SN2-1, SN-2). 4), cold and hot water temperature sensor SN3 is shown. Furthermore, a weather information server SV is shown as a device with which the air conditioning control device 100 communicates via the network.
In the following description, unless there is a particular distinction between slab temperature sensor SN1 (SN1-1 to SN1-21), room temperature sensor SN2 (SN2-1, SN-4), and cold/hot water temperature sensor SN3, sensors SN, Alternatively, they are written as sensors SN1 to SN3.

First, the sensors SN1 to SN3 and the weather information server SV will be explained.
The slab internal temperature sensor SN1 is a sensor that detects the temperature within the slab 2 in the building 1 (slab internal temperature).
In this embodiment, an example is given in which 21 slab temperature sensors SN1-1 to SN1-21 are provided as the slab internal temperature sensor SN1. These intra-slab temperature sensors SN1-1 to SN1-21 are provided to detect the temperature within the slab 2 at different positions.
The room temperature sensor SN2 (SN2-1, SN-4) is a sensor that detects the temperature inside the living room 1a.
In this embodiment, an example is given in which four room temperature sensors SN2-1 to SN2-4 are provided as room temperature sensors SN2. These room temperature sensors SN2-1 to SN2-4 are provided to detect temperatures at different positions in the living room 1a, respectively.
The cold and hot water temperature sensor SN3 is a sensor that detects the temperature of cold and hot water obtained by exchanging heat from the underground heat exchanger 20 with the heat exchanger 30 (cold and hot water temperature (an example of medium temperature)). be. The cold and hot water temperature sensor SN3 measures, for example, the temperature of water near the outlet of the heat exchanger 30, or the temperature of the water flowing near the entrance of the cold and hot water pipe at a portion of the entire cold and hot water pipe located corresponding to the slab 2. It may be arranged to detect temperature.
The weather information server SV is a server that provides weather information on a network such as the Internet, for example.

Next, a configuration example of the air conditioning control device 100 will be described. The air conditioning control device 100 shown in the figure includes a communication section 101, a control section 102, a storage section 103, an operation section 104, and a display section 105. The functions of the air conditioning control device 100 under the configuration shown in the figure are realized by a CPU (Central Processing Unit) included in the air conditioning control device 100 executing a program.

The communication unit 101 communicates with other devices and devices provided in correspondence with the air conditioning system, such as the heat exchanger 30 and the sensor SN. Furthermore, the communication unit 101 communicates with the weather information server SV via the network. Furthermore, the communication unit 101 may be connected to an upper level server (not shown) or the like.

The control unit 102 executes various controls in the air conditioning control device 100. The control unit 102 in the figure includes a heat storage operation time calculation unit 121, a notification unit 122, and an operation control unit 123.
Note that since the coefficient deriving unit 124 is a functional unit corresponding to the second embodiment, its explanation here will be omitted.

The heat storage operation time calculation unit 121 calculates the heat storage operation time.

The notification unit 122 notifies the operation manager of the heat storage operation time calculated by the heat storage operation time calculation unit 121. The notification unit 122 may notify the heat storage operation time by displaying it on the display unit 105, for example, or may notify the heat storage operation time by transmitting a notification of the heat storage operation time to a terminal owned by the operation manager.

The operation control unit 123 controls the operation of air conditioning equipment corresponding to main air conditioning. Further, the operation control unit 123 controls the operation of air conditioning equipment (heat source equipment) corresponding to heat storage operation.

The storage unit 103 stores various types of information used by the control unit 102. The storage unit 103 in the figure includes a registration calculation parameter storage unit 131.
The registered calculation parameter storage unit 131 stores parameters registered in advance among the parameters (calculation parameters) used by the heat storage operation time calculation unit 121 to calculate the heat storage operation time. In other words, the registered calculated parameter storage unit 131 stores, among the calculated parameters, parameters registered and set in advance as known and calculated parameters set by the operation manager.

The operation unit 104 collectively represents operators and input devices used to operate the air conditioning control device 100.
The display unit 105 performs display under the control of the control unit 102.

[Processing procedure example]
An example of a processing procedure executed by the air conditioning control device 100 in response to calculation of the heat storage operation time will be described with reference to the flowchart in FIG. 3 .
Step S101: In the air conditioning control device 100, the heat storage operation time calculation unit 121 acquires calculation parameters.
FIG. 4 shows calculated parameters by classification. The calculated parameters in the figure are classified into, for example, usage conditions, boundary conditions, initial construction conditions, and equipment setting conditions.

The calculation parameters of the usage conditions are the air conditioning start time (U1), the number of users (U2), the usage time (U3), and the usage details (U4).
The air conditioning start time (U1) is the time when main air conditioning is started. The number of users (U2) is the number of users who use the building 1 for business, work, etc. The usage content is the usage content (work content) of the user in the building 1. The usage time (U3) is the length of time that the user uses the building 1. The usage time (U3) may be, for example, the time during which main air conditioning is performed.
The air conditioning start time (U1), number of users (U2), usage time (U3), and usage details (U4) included in the calculation parameters of the usage conditions are each stored in the registered calculation parameter storage unit 131. The heat storage operation time calculation unit 121 acquires the air conditioning start time (U1), the number of users (U2), the usage time (U3), and the usage details (U4) from the registered calculation parameter storage unit 131.

The calculation parameters for the boundary conditions are the equipment heat generation load (B1), the outside air temperature (B2), and the amount of solar radiation (B3).
The device heat generation load (B1) is the amount of heat generated by the devices operated in the building 1 during the usage time. In other words, it is a heat load that occurs corresponding to the usage time. The device heat generation load (B1) is stored in the registered calculation parameter storage unit 131 as a known value, for example. The heat storage operation time calculation unit 121 acquires the equipment heat generation load (B1) from the registered calculation parameter storage unit 131.
The outside air temperature (B2) is a predicted value of the temperature outside the building 1 during the usage time (target usage time) corresponding to the main air conditioning period following the heat storage operation for which the heat storage operation time is calculated. The heat storage operation time calculation unit 121 acquires the outside air temperature (B2) based on information regarding the temperature forecast provided by the weather information server SV.
The amount of solar radiation (B3) is, for example, the amount of solar radiation to the building 1 during the target use time. The heat storage operation time calculation unit 121 obtains the solar radiation amount (B3) based on the information regarding the solar radiation provided by the weather information server SV. The solar radiation amount (B3) in this case may be, for example, the total solar radiation amount.

The calculation parameters of the initial building conditions are the slab internal temperature (I1), the room temperature (I2), and the cold/hot water temperature (I3).
The slab internal temperature (I1) is the slab internal temperature detected by the slab temperature sensor SN1. The heat storage operation time calculation unit 121 obtains 21 slab internal temperatures (I1) detected by each of the slab temperature sensors SN1-1 to SN1-21.
Room temperature (I2) is the room temperature detected by room temperature sensor SN2. The heat storage operation time calculation unit 121 obtains four room temperatures (I2) detected by each of the room temperature sensors SN2-1 to SN2-4.
The cold/hot water temperature (I3) is the water temperature detected by the cold/hot water temperature sensor SN3. The heat storage operation time calculation unit 121 acquires the water temperature detected by the cold and hot water temperature sensor SN3 as the cold and hot water temperature (I3).

The calculation parameters for the equipment setting conditions are the target temperature (M1) and the target start-up load (M2).
The target temperature (M1) is a target value of the room temperature at the start of main air conditioning (at startup: an example of a predetermined timing after the end of heat storage operation). If the main air conditioning is started at the end of the heat storage operation, the startup time is the same as the end of the heat storage operation. Further, in the case of operation in which main air conditioning is started after a certain time interval from the end of heat storage operation, the start time of main air conditioning is the startup time. Alternatively, in the case of an operation in which main air conditioning is started at a certain time interval after the end of heat storage operation, the target temperature (M1) is a predetermined temperature from the end of heat storage operation to the time when main air conditioning is started. The timing may be set to the rising time.
The target temperature (M1) is set, for example, by an operation manager by operating the operation unit 104, and the set value is stored in the registered calculation parameter storage unit 131. The heat storage operation time calculation unit 121 acquires the target temperature (M1) from the registered calculation parameter storage unit 131.
Note that the target temperature (M1) is not limited to one in which the target value is room temperature. For example, the target temperature (M1) may be a target value such as mean radiant temperature (MRT), or an operating temperature that is the average value of room temperature and MRT.

The target start-up load (M2) is the target value of the thermal load at the time of start-up. The target start-up load (M2) is set, for example, by an operation manager by operating the operation unit 104, and the set value is stored in the registered calculation parameter storage unit 131. The heat storage operation time calculation unit 121 acquires the target start-up load (M2) from the registered calculation parameter storage unit 131.

Step S102: The heat storage operation time calculation unit 121 calculates the usage internal load q _u using the following equation (1). The internal load q _u during use is, for example, the heat load inside the living room 1a during the use time. As shown in equation (1), the internal load during use q _u is calculated using the equipment heat generation load (B1), the number of users (U2), and the content of use (U4) among the calculation parameters acquired in step S101. is used.

In calculating the usage internal load q _u , the heat storage operation time calculation unit 121 uses the usage details (U4) to set the coefficients a, b, and c in (Formula 1). Table 1 shows an example of the definition of the coefficients a, b, and c in (Formula 1) according to the content of use (U4). Note that in the example of (Equation 1), the term a is a constant, but in this embodiment, such a constant is also treated as being included in the "coefficient."

Table 1 shows an example in which usage contents (U4) are classified by work contents (action contents) such as "work,""work/lecture," and "lecture."
"Work" refers to the usage of living room 1a, in which the user does not work while sitting at a desk ("lecture"), but mainly performs some kind of "work" such as construction work or maintenance. That is what it is.
"Work/lecture" means that the user uses the living room 1a as a mixture of "work" and "lecture", for example.
``Lecture lecture'' means that the user hardly performs ``work'' and mainly performs ``lecture'' as the content of use of the living room 1a.
As an example, when the usage content (U4) is "work", the coefficients in (Formula 1) are set as a=0, b-1, and c=70.
The classification of usage content (U4) is not limited to the above-mentioned "work", "work/lecture", and "lecture", and may be changed as appropriate depending on the use of Building 1, etc. good.

Step S103: Further, the heat storage operation time calculation unit 121 calculates the equivalent outside temperature T _sat (an example of outside temperature) using the following (Formula 2). As shown in equation (2), to calculate the equivalent outside temperature T _sat , among the calculation parameters acquired in step S101, air conditioning start time (U1), usage time (U3), outside air temperature (B2), The amount of solar radiation (B3) is used.
As shown in (Equation 2), the average value of the outside air temperature (B2) in the time period (U1 to U1+U3) from the start time to the end time corresponding to the usage time is assigned to the variable _X2 .
Further, the average value of the amount of solar radiation (B3) in the time period (U1 to U1+U3) corresponding to the usage time is assigned to the variable _Y2 . Therefore, depending on (Equation 2), the average value of the equivalent outside temperature during the usage time is calculated as the equivalent outside temperature T _sat .
Further, the coefficients a, b, and c in (Equation 2) are set to different values depending on the season (time) of the year. Table 2 is an example of the definition of coefficients a, b, and c in Equation 2.
Note that, depending on step S103, for example, a normal outside temperature may be calculated instead of the equivalent outside temperature T _sat , but the equivalent outside temperature T _sat can improve the accuracy of the heat storage operation time that is finally calculated. can do.

Step S104: The heat storage operation time calculation unit 121 calculates the skeleton processing load qb. The frame processing load qb is the heat load that the frame, such as the slab 2, should handle in response to startup. The heat storage operation time calculation unit 121 uses the usage internal load q _u calculated in step S102 and the target start-up load (M2) in the calculation parameters acquired in step S101, and calculates it by the following (Formula 3). Calculate the frame processing load qb.
In (Equation 3), the target rising load (M2) is set to q _set . Table 3 is an example of the definition of coefficients a, b, and c in (Equation 3).

Step S105: The heat storage operation time calculation unit 121 calculates the target rising slab/beam temperature T _sb,set .
The target starting slab/beam temperature _Tsb,set is a target value of the slab/beam temperature (framework temperature) at the time of starting. The heat storage operation time calculation unit 121 uses the target temperature (M1) in the calculation parameter acquired in step S101, the equivalent outside temperature T _sat calculated in step S103, and the frame processing load qb calculated in step S104. Then, the target rising slab/beam temperature _Tsb,set is calculated using the following (Equation 4). Table 4 shows an example of the definition of coefficients a, b, c, d, e, and f in (Equation 4).
The heat storage operation time calculation unit 121 calculates the target rising slab/beam temperature _Tsb,set by repeatedly performing calculations so that the frame processing load qb, which is the input value to Equation 4, is satisfied. Note that under the definitions of coefficients a, b, c, d, e, and f in Table 4, coefficients c, d, e, and f are each zero. This is because the specifications of the building 1, such as heat capacity, heat insulation, airtightness, etc., assume that there will be no influence from external weather conditions.

Step S106: The heat storage operation time calculation unit 121 calculates the slab temperature _Ts . The slab temperature T _s is the current temperature of the slab 2, which is cooled by the radiation panel 2b, in the building structure.
The heat storage operation time calculation unit 121 calculates the slab temperature T _s using the following (Equation 5) using the slab internal temperature (I1) and room temperature (I2) in the calculation parameters acquired in step S101.
In (Formula 5), the slab internal temperature (I1) detected by each of the 21 slab internal temperature sensors SN1 is set as T _s,k (k=1 to 21). Further, the room temperature (I2) detected by each of the four room temperature sensors SN2 is set to T _r,k (k=1 to 4). Table 5 shows an example of the definition of the coefficients a (a ₁ to a ₂₁ ) and b (b ₁ to b ₄ ) in (Equation 5).

Step S107: The heat storage operation time calculation unit 121 calculates the beam temperature _Tb . The beam temperature T _b is the current temperature of the beam 2a, which is not cooled by the radiation panel 2b, in the building frame.
The heat storage operation time calculation unit 121 calculates the beam temperature T _b using the following (Equation 6) using the slab internal temperature (I1) in the calculation parameters acquired in step S101 and the room temperature (I2).
In (Equation 6), the slab internal temperature (I1) detected by each of the 21 slab internal temperature sensors SN1 is set as T _s,k (k=1 to 21). Further, the room temperature (I2) detected by each of the four room temperature sensors SN2 is set to T _r,k (k=1 to 4). Table 6 shows an example of the definition of the coefficients a (a ₁ to a ₂₁ ) and b (b ₁ to b ₄ ) in (Equation 6).

Step S108: The heat storage operation time calculation unit 121 calculates the slab/beam temperature _Tsb . The slab/beam temperature T _sb is the average temperature of the entire building frame including the slab 2 and the beam 2a.
The heat storage operation time calculation unit 121 uses the slab temperature T _s calculated in step S106 and the beam temperature T _b calculated in step S107 to calculate the slab/beam temperature T _sb by the following (Equation 7). calculate. Table 7 shows an example of the definition of coefficients a, b, c, d, e, and f in (Equation 7).

Step S109: The heat storage operation time calculation unit 121 calculates the heat storage operation time t. The heat storage operation time t is the length of the heat storage operation time required to bring the frame, room temperature, etc. to the target thermal environment.
The heat storage operation time calculation unit 121 calculates the target rising slab/beam temperature T _sb,set calculated in step S105, the slab/beam temperature T _sb calculated in step S108, and the cold temperature in the calculation parameters acquired in step S101. Using the water temperature (I3), the heat storage operation time t is calculated by the following (Equation 8). In (Formula 8), the cold/hot water temperature (I3) is expressed as _Tw . Table 8 shows an example of the definition of coefficients a, b, c, d, e, and f in (Equation 7).

Note that the order of the processing of each step shown in the figure may be changed as appropriate as long as the calculation parameters and calculation results necessary for calculation in the processing of each step have already been obtained.

FIG. 5 shows an example of the calculation result of the heat storage operation time t based on the relationship between the slab temperature and the cold/hot water temperature (in this case, the cold/hot water temperature). In the figure, the vertical axis shows the heat storage operation time t, and the horizontal axis shows the difference between the slab temperature before the start of the heat storage operation and the target slab temperature (adjusted slab temperature). Moreover, regarding the cold/hot water temperature, the conditions are 15°C and 20°C.
As can be understood from the figure, the heat storage operation time t becomes longer as the cold/hot water temperature is higher and as the adjusted slab temperature is higher.

The heat storage operation time t calculated by the heat storage operation time calculation unit 121 as described above may be stored in the storage unit 103, for example. The notification unit 122 may notify the operation manager of the heat storage operation time t at a predetermined timing by displaying, sending a notification, or the like.

Note that the heat storage operation time calculation unit 121 may determine the heat storage operation start time based on the heat storage operation time t calculated in step S109. As an example, if the main air conditioning is started at 8:00 a.m. and the heat storage operation time t is 10 hours, 10:00 p.m., which is 10 hours back from 8:00 a.m., is determined as the heat storage operation start time. It's fine.
In this case, the notification unit 122 may notify the operation manager of the heat storage operation start time together with the heat storage operation time t or in place of the heat storage operation time t.
Further, the operation control unit 123 may start the heat storage operation in response to reaching the operation start time determined as described above, and may terminate the heat storage operation in response to the elapse of the heat storage operation time. .

Note that the heat storage operation time calculation unit 121 may obtain the equivalent outside temperature T _sat by a method other than calculation using equation (2). For example, after the operation manager performs an operation to input the value of the equivalent outside temperature confirmed by looking at weather information, the heat storage operation time calculation unit 121 converts the input value into the equivalent outside temperature T. It may be obtained as _{a sat} .
Further, the heat storage operation time calculation unit 121 may obtain the frame processing load qb and the slab/beam temperature T _sb by methods other than calculations using equations (3) and (7), respectively. For example, an operation manager is required to determine the values of the frame processing load and slab/beam temperature from the current temperature based on experience, etc., input the determined values, and then determine the heat storage operation time. The calculation unit 121 may obtain the values input through the operation as the frame processing load qb and the slab/beam temperature _Tsb .

<Second embodiment>
Next, a second embodiment will be described. For the coefficients (a, b, c, d, e, f) in (Equation 8) used to calculate the heat storage operation time t, one value each derived based on predetermined conditions may be applied. However, depending on the building in which the heat storage operation is performed, for example, specifications that affect the heat storage operation time, such as heat capacity, heat insulation, and airtightness, may vary greatly. Considering this, the accuracy of the thermal storage operation time t calculated by Equation 8 is better if the coefficient of (Equation 8) is derived from a value that conforms to the specifications of Building 1, rather than from it according to a unique condition. This is preferable because it makes it possible to increase the
Therefore, as a second embodiment, a configuration for the air conditioning control device 100 of this embodiment to derive the coefficients of (Equation 8) in consideration of the specifications of the building 1 will be described.

The control unit 102 of the air conditioning control device 100 of this embodiment includes a coefficient derivation unit 124. The coefficient deriving unit 124 derives the coefficients (a, b, c, d, e, f) of (Equation 8) used for calculating the heat storage operation time t.

The flowchart in FIG. 6 is a flowchart illustrating an example of a processing procedure executed by the coefficient deriving unit 124 in response to calculation of the coefficients (a, b, c, d, e, f) of (Equation 8).
Step S201: The coefficient deriving unit 124 sets primary input conditions to be used when performing heat load calculation in step S202, which will be described later. The primary input conditions include predetermined information items regarding the specifications of the building 1.

Step S202: The coefficient deriving unit 124 performs heat load calculation using the input conditions set in step S201. The heat load calculation in step S202 is a heat load calculation for the structure of the building 1 itself. The coefficient deriving unit 124 performs thermal circuit network calculation in the heat load calculation in step S202.

Step S203: The coefficient deriving unit 124 evaluates the heat load calculation result obtained in step S202 (thermal load calculation evaluation).
FIG. 7 is an example of load calculation evaluation corresponding to step S203. Figure 7 (A) shows the relationship between the frame temperature (initial frame temperature) at the start of air conditioning (startup time) and the heat load of Building 1 for each condition of equivalent outside temperature, as a result of a certain heat load calculation evaluation. It shows a relationship. The horizontal axis is the initial temperature of the skeleton, and the vertical axis is the heat load. Furthermore, the equivalent outside temperature conditions are 31.1°C, 35.1°C, 38.6°C, and 44.8°C. The figure shows that the heat load relative to the initial temperature of the building frame is almost uniquely determined without being affected by the considerable outside temperature.
Moreover, FIG. 7(B) shows the evaluation results for the same heat load calculation results as in FIG. 7(B) as a relationship between the equivalent outside air temperature and the heat load for each condition of the initial temperature of the building frame. The figure also shows that the heat load is determined almost uniquely in response to the initial temperature of the building frame, without being affected by the considerable outside temperature.
In other words, depending on the heat load calculation evaluation shown in Figures 7(A) and 7(B), the heat load is almost unaffected by the considerable outside temperature, and therefore Building 1 is not affected by airtightness, heat capacity, and insulation. It is derived that the characteristics, etc. are high.

The explanation returns to FIG. 6.
Step S204: The coefficient deriving unit 124 classifies the building 1 into either type A or type B based on the result of the heat load calculation evaluation in step S203. Type A is a building that has high airtightness, heat capacity, heat insulation, etc., and is determined to be less susceptible to weather conditions such as considerable outside temperature. Type B is a building that has low airtightness, heat capacity, thermal insulation, etc., and is determined to be more affected by weather conditions than a certain level.

Step S205: If it is determined that the type is A in step S204, the coefficient deriving unit 124 sets the cold/hot water temperature, the initial temperature of the building frame, and the heat storage operation time as the secondary input conditions used for the thermal network calculation in step S206. Set.
Step S206: The coefficient deriving unit 124 performs thermal load calculation by thermal circuit network calculation using the input conditions set in step S205 as variable conditions.

Step S207: The coefficient deriving unit 124 outputs the result of the thermal network calculation in step S206. FIG. 8 shows the results of the thermal network calculation in step S207. The figure shows the relationship between the building body cooling temperature range and the heat storage time under conditions where the difference value between the initial temperature of the building body and the cold/hot water temperature is changed. The horizontal axis is the adjusted slab temperature, and the vertical axis is the heat storage time.

The explanation returns to FIG. 6.
Step S208: The coefficient deriving unit 124 identifies each coefficient in (Equation 8) based on the result of the thermal network calculation output in step S207. For example, the coefficient deriving unit 124 identifies coefficients a, b, c, d, e, and f by substituting them into the variables in (Equation 8) based on the result of the thermal network calculation output in step S207. be made to do.

Step S209: If it is determined that the type is B in step S204, the coefficient deriving unit 124 sets the cold/hot water temperature, the initial temperature of the building frame, and the heat storage operation time as the secondary input conditions used for the thermal network calculation in step S206. , and set weather conditions. The weather conditions may include the relative outside temperature, amount of solar radiation, and the like.
In other words, in the input condition setting in step S205 corresponding to type A, the heat load is almost uniquely determined by the initial temperature of the building frame, regardless of external weather conditions, etc., so weather conditions should not be included in the input conditions. be done. On the other hand, in the case of type B, since external conditions such as weather also affect the heat load, the weather conditions are also included in the input conditions.
Step S210: The coefficient deriving unit 124 performs heat load calculation by thermal circuit network calculation using the input conditions set in step S209 as variable conditions.

Step S211: The coefficient deriving unit 124 outputs the result of the thermal network calculation in step S206.
Step S212: The coefficient deriving unit 124 identifies each coefficient in (Equation 8) based on the result of the thermal network calculation output in step S207.
In this manner, in this embodiment, a value suitable for the type of building 1 can be derived for each coefficient in (Equation 8).

<Variations of air conditioning system>
Note that the configuration of the air conditioning system corresponding to the heat storage operation of each of the embodiments described above is not limited to the example shown in FIG. 1.
FIG. 9 shows another example (first example) of the air conditioning system that supports the heat storage operation of this embodiment. In the figure, the same parts as in FIG. 1 are given the same reference numerals.
In the figure, a cooling tower 40 and a water-cooled heat pump 50 are provided in place of the underground heat exchanger 20 and heat exchanger 30 in FIG. In such a configuration, the cooling tower 40 functions as a heat source device. The air conditioning system shown in the figure uses water (chilled water) cooled by a cooling tower 40 as cooling water for a water-cooled heat pump 50, and transmits the cold heat cooled by the water-cooled heat pump 50 to the slab 2 (framework).
In addition, during the middle seasons of the year when the air temperature is not high and the humidity is low, such as spring and autumn, the cold water cooled by the cooling tower 40 is supplied to the building frame without heat exchange by the water-cooled heat pump 50. (free cooling). Thereby, there is no need to operate the water-cooled heat pump 50, so it is possible to save energy.

FIG. 10 shows another example (second example) of the air conditioning system that supports the heat storage operation of this embodiment. In the figure, the same parts as in FIG. 1 are given the same reference numerals.
In the figure, a water-cooled heat pump 60 (geothermal heat pump) is provided in place of the heat exchanger 30 of FIG. 1. In this case, the water-cooled heat pump 50 uses the heat absorbed from the underground heat exchanger 20 to produce cold water and supplies it to the slab 2 side.

FIG. 11 shows another example (third example) of the air conditioning system that supports the heat storage operation of this embodiment. In the figure, the same parts as in FIG. 1 are given the same reference numerals.
In the figure, in addition to the heat sources of the underground heat exchanger 20 and the heat exchanger 30 shown in FIG. 1, an air-cooled heat pump 10 is further provided as a heat source.
In this case, during the heat storage operation, there is a heat storage operation mode that uses only the heat source of the underground heat exchanger 20 and the heat exchanger 30, and a heat storage operation mode that uses only the heat source of the underground heat exchanger 20 and the heat exchanger 30, and the air-cooled heat pump 10 is assisted with the heat source of the underground heat exchanger 20 and the heat exchanger 30. It is possible to switch between an operation mode in which the air-cooled heat pump 10 is used as a heat source and a heat storage operation mode in which only the air-cooled heat pump 10 is used as a heat source. The heat storage operation mode may be switched depending on, for example, the status of the thermal environment of the frame or the like due to the current heat storage operation.

In each of the above embodiments, an example is given of a configuration in which two, the underground heat exchanger 20 and the air-cooled heat pump 10, function as heat sources in heat storage operation, but it is also possible to provide three or more devices that function as heat sources. From among a predetermined number of heat source operation modes based on a combination of these devices, a heat source operation mode designated by an operation or determined as a switching destination may be applied to the heat storage operation.

Note that in this embodiment, the heat source device that is a heat source using natural energy is not limited to the underground heat exchanger 20. For example, equipment equipped with a cooling tower to perform free cooling may be used as the heat source equipment.

Note that by recording a program for realizing the functions of the air conditioning control device 100, etc. described above on a computer-readable recording medium, and causing the computer system to read and execute the program recorded on this recording medium, the above-mentioned The processing may be performed as the air conditioning control device 100 or the like. Here, "reading a program recorded on a recording medium into a computer system and executing it" includes installing the program on the computer system. The "computer system" here includes hardware such as an OS and peripheral devices. Further, a "computer system" may include a plurality of computer devices connected via a network including the Internet, a WAN, a LAN, a communication line such as a dedicated line, etc. Furthermore, the term "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into computer systems. In this way, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM. The recording medium also includes a recording medium provided internally or externally that can be accessed from the distribution server to distribute the program. The code of the program stored in the recording medium of the distribution server may be different from the code of the program in a format executable by the terminal device. That is, as long as it can be downloaded from the distribution server and installed in an executable form on the terminal device, the format in which it is stored on the distribution server does not matter. Note that a configuration in which a program is divided into a plurality of parts and downloaded at different timings and then combined on a terminal device, or a distribution server that distributes each of the divided programs may be different. Furthermore, a "computer-readable recording medium" refers to a storage medium that retains a program for a certain period of time, such as volatile memory (RAM) inside a computer system that serves as a server or client when a program is transmitted via a network. This shall also include things. Moreover, the above-mentioned program may be for realizing part of the above-mentioned functions. Furthermore, it may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

1 building, 1a living room, 2 slab, 2a beam, 2b radiant panel, 20 underground heat exchanger, 30 heat exchanger, 100 air conditioning control device, 101 communication section, 102 control section, 103 storage section, 104 operation section, 105 Display unit, 121 Heat storage operation time calculation unit, 122 Notification unit, 123 Operation control unit, 124 Coefficient derivation unit, 131 Registered calculation parameter storage unit

Claims (6)

A building frame that indicates a target temperature that is the target room temperature at a predetermined timing after the end of a heat storage operation in which heat is stored in the building frame by a heat source device, and a heat load that the building frame should handle in response to a predetermined timing after the end of the heat storage operation. The processing load and the outside temperature corresponding to the usage time during which the building is used by the user are input as first parameters, and the heat storage operation is terminated by a predetermined first calculation using the input first parameters. Calculate the target body temperature at subsequent predetermined timings,
The calculated target building body temperature, the building body temperature corresponding to the current time, and the medium temperature supplied from the heat source equipment according to the heat storage in the building body are input as second parameters, and a predetermined temperature is calculated using the input second parameters. An air conditioning control device comprising: a heat storage operation time calculation unit that calculates a heat storage operation time required for the heat storage operation by the second calculation. The heat storage operation time calculation unit includes:
The air conditioning control device according to claim 1, wherein in the first calculation, when the degree of influence of the building by weather conditions is below a certain level, the calculation is performed with the coefficient for the outside temperature set to zero. The heat storage operation time calculation unit includes:
The target value of the heat load at a predetermined timing after the end of the heat storage operation in which the heat source equipment stores heat in the building frame and the heat load during the usage time are input as third parameters, and the target value of the input heat load and The air conditioning control according to claim 1 or 2, wherein the frame processing load in the first parameter is calculated by performing a third calculation of adding a value obtained by multiplying each of the heat loads in the usage time by a predetermined coefficient. Device. The heat storage operation time calculation unit includes:
The device heat generation load, which is the amount of heat of the equipment operated in the building during the usage time, the number of users of the building during the usage time, and the user's behavior during the usage time are input as fourth parameters. death,
The heat load for the usage time in the third parameter is calculated by a third calculation using the input heat generation load of the device, the number of users, and a coefficient determined according to the input action content. 3. The air conditioning control device according to 3. A building frame that indicates a target temperature that is the target room temperature at a predetermined timing after the end of a heat storage operation in which heat is stored in the building frame by a heat source device, and a heat load that the building frame should handle in response to a predetermined timing after the end of the heat storage operation. The processing load and the outside temperature corresponding to the usage time during which the building is used by the user are input as first parameters, and the heat storage operation is terminated by a predetermined first calculation using the input first parameters. Calculate the target body temperature at subsequent predetermined timings,
The calculated target building body temperature, the building body temperature corresponding to the current time, and the medium temperature supplied from the heat source equipment according to the heat storage in the building body are input as second parameters, and a predetermined temperature is calculated using the input second parameters. The air conditioning control method includes a heat storage operation time calculation step of calculating the heat storage operation time required for the heat storage operation by the second calculation. A computer as an air conditioning control device,
A building frame that indicates a target temperature that is the target room temperature at a predetermined timing after the end of a heat storage operation in which heat is stored in the building frame by a heat source device, and a heat load that the building frame should handle in response to a predetermined timing after the end of the heat storage operation. The processing load and the outside temperature corresponding to the usage time during which the building is used by the user are input as first parameters, and the heat storage operation is terminated by a predetermined first calculation using the input first parameters. A target building body temperature at a subsequent predetermined timing is calculated, and the calculated target building body temperature, the building body temperature corresponding to the current time, and the medium temperature supplied from the heat source device according to heat storage in the building body are used as second parameters. A program for functioning as a heat storage operation time calculation unit that calculates a heat storage operation time required for heat storage operation by inputting and performing a predetermined second calculation using the input second parameters.

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