Evaluation assistance device, evaluation assistance method, and program

Abstract

Provided is an evaluation assistance device for assisting in evaluating air flows in a space in which one or more air conditioners and one or more devices are installed, the evaluation assistance device comprising: an acquisition unit that acquires, for at least one air conditioner and at least one device, values representing air temperatures at an air intake point and a supply air outlet point of the air conditioner, air temperatures at an air inlet point and an exhaust air outlet point of the device, and the amount of heat generated by the device; and a calculation unit that solves equations representing the relationship between the amount of heat, the air temperatures, and the air flow rate for a first air flow from the supply air outlet point to the air inlet point, a second air flow from the exhaust air outlet point to the air intake point, a third air flow from the supply air outlet point to the air intake point, and a fourth air flow from the exhaust air outlet point to the air inlet point using the acquired values, and thus determines the amount of heat at each of the air intake point, the supply air outlet point, the air inlet point, and the exhaust air outlet point.

Description

Evaluation Support Device, Evaluation Support Method, and Program

[0001] The present disclosure relates to an evaluation support device, an evaluation support method, and a program. This application claims priority based on Japanese Patent Application No. 2024-174350 filed in Japan on October 3, 2024, and incorporates its content herein by reference.

[0002] Patent Document 1 describes the following airflow evaluation device aimed at easily detecting deterioration of airflow in a rack equipped with an information and communication device. In the airflow evaluation device described in Patent Document 1, the state of the airflow is evaluated based on the ratio f between the actual temperature rise amount of the airflow passing through the rack and the temperature rise amount in an ideal state where all the airflow passing through the rack contributes to cooling the information and communication device. In Patent Document 1, the case where this ratio f is 1 is the ideal state, less than 1 indicates a state where the airflow bypasses (a state where cold air leakage occurs), and greater than 1 indicates a state where the airflow recirculates (a state where warm air circulation occurs).

[0003] International Publication No. 2020 / 261541

[0004] However, the airflow evaluation device described in Patent Document 1 has a problem that when both cold air leakage and warm air circulation occur, the magnitudes of cold air leakage and warm air circulation cannot be quantitatively grasped.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide an evaluation support device, an evaluation support method, and a program that can appropriately evaluate cold air leakage and warm air circulation.

[0006] To solve the above problems, the evaluation support device according to the present disclosure is an evaluation support device that supports the evaluation of airflow in a space in which one or more air conditioners and one or more devices are installed, and comprises: an acquisition unit that acquires the air temperature at the intake point and outlet point of the air conditioner, the air temperature at the intake point and exhaust point of the device, and values ​​representing the heat output of the device for at least one of the air conditioners and at least one of the devices; and a calculation unit that calculates the heat output at the intake point, outlet point, intake point, and exhaust point by solving equations representing the relationship between heat output, air temperature, and airflow rate for a first airflow from the outlet point to the intake point, a second airflow from the exhaust point to the intake point, a third airflow from the outlet point to the intake point, and a fourth airflow from the exhaust point to the intake point, using the acquired values.

[0007] The evaluation support method relating to this disclosure is a method for supporting the evaluation of airflow in a space in which one or more air conditioners and one or more devices are installed, and includes the steps of: obtaining the air temperature at the intake point and outlet point of the air conditioner, the air temperature at the intake point and exhaust point of the device, and values ​​representing the heat output of the device for at least one of the air conditioners and at least one of the devices; and determining the heat output at the intake point, outlet point, intake point, and exhaust point by solving equations representing the relationship between heat output, air temperature, and airflow rate for a first airflow from the outlet point to the intake point, a second airflow from the exhaust point to the intake point, a third airflow from the outlet point to the intake point, and a fourth airflow from the exhaust point to the intake point, using the obtained values.

[0008] The program relating to this disclosure is a program for supporting the evaluation of airflow in a space in which one or more air conditioners and one or more devices are installed, and causes a computer to perform the following steps: acquire the air temperature at the intake and outlet points of the air conditioners, the air temperature at the intake and exhaust points of the devices, and values ​​representing the heat output of the devices for at least one of the air conditioners and at least one of the devices; and solve equations representing the relationship between heat output, air temperature, and airflow rate for a first airflow from the outlet point to the intake point, a second airflow from the exhaust point to the intake point, a third airflow from the outlet point to the intake point, and a fourth airflow from the exhaust point to the intake point, using the acquired values, to determine the heat output at the intake point, the outlet point, the intake point, and the exhaust point.

[0009] The evaluation apparatus, evaluation method, and program disclosed herein enable the proper evaluation of cold air leakage and warm air circulation.

[0010] This is a schematic block diagram of an evaluation support device according to an embodiment of this disclosure. This is a diagram showing the overall configuration of an air conditioning system according to an embodiment of this disclosure. This is a diagram showing an airflow model of a server room according to an embodiment of this disclosure. This is a diagram showing the environmental state diagram of a server room according to an embodiment of this disclosure. This is a diagram showing the processing flow according to an embodiment of this disclosure. This is a diagram showing an example of the temperature distribution of a server room according to an embodiment of this disclosure. This is a diagram showing another example of the temperature distribution of a server room according to an embodiment of this disclosure. This is a diagram showing an example of a heat quantity change state diagram according to an embodiment of this disclosure. This is a diagram showing another example of a heat quantity change state diagram according to an embodiment of this disclosure. This is a diagram showing an example of a heat quantity circulation diagram according to an embodiment of this disclosure. This is a diagram showing another example of a heat quantity circulation diagram according to an embodiment of this disclosure. This is a schematic block diagram showing the configuration of a computer according to an embodiment of this disclosure.

[0011] Hereinafter, the evaluation support device, evaluation support method, and program according to the embodiments of this disclosure will be described with reference to Figures 1 to 12. In each figure, the same or corresponding components are given the same reference numerals, and their descriptions will be omitted as appropriate.

[0012] Figure 1 is a schematic block diagram of an evaluation support device 100 according to an embodiment of the present disclosure. Figure 2 is a diagram showing the overall configuration of an air conditioning system 1 according to an embodiment of the present disclosure. The evaluation support device 100 is an evaluation support device that assists in the evaluation of airflow in a space R in which one or more air conditioners 30 and one or more devices 2 are installed, as shown in Figure 2. The evaluation support device 100 can be configured using a computer such as a server, personal computer, tablet terminal, or smartphone, and comprises the following parts as a functional block composed of a combination of hardware such as a computer and peripheral devices, and software such as a program executed by the computer. That is, the evaluation support device 100 comprises an acquisition unit 101, a calculation unit 102, and an output unit 103 as a functional block.

[0013] Now, referring to Figure 2, an example of the configuration of the air conditioning system 1 to be evaluated by the evaluation support device 100 will be described. As shown in Figure 2, the air conditioning system 1 comprises a plurality of devices 2, air conditioning equipment 3, and a control device 10.

[0014] Device 2 is a heat-generating element, and is an IT (information technology) device such as a server or communication equipment installed in a space R such as a server room (hereinafter, space R will also be referred to as server room R). (Hereafter, device 2 will also be referred to as server 2.) Server 2 has a fan 20 that takes in cold air from the outside and exhausts air heated by the heat generated by server 2. As shown in Figure 2, the servers 2 are arranged in the left-right direction indicated by the arrows, and also in the up-down direction indicated by the arrows across a passageway. In this case, in the up-down direction, the intake sides and exhaust sides of the fans 20 of each server 2 face each other. The passageway where the intake sides of the fans 20 are located will also be referred to as the cold aisle CA, and the passageway where the exhaust sides are located will also be referred to as the hot aisle HA.

[0015] Furthermore, the server 2 is equipped with an intake air temperature sensor 21 for measuring the intake air temperature of the server 2 (fan 20) and an exhaust air temperature sensor 22 for measuring the exhaust air temperature. In other embodiments, instead of or in addition to the intake air temperature sensor 21 and the exhaust air temperature sensor 22, a temperature sensor for measuring the temperature of the CPU (Central Processing Unit) and GPU (Graphics Processing Unit) of the server 2 may be provided.

[0016] The air conditioning system 3 has at least one air conditioner 30. The air conditioner 30 draws in air from the server room R, cools it with a heat exchanger (not shown), and blows it back into the server room R. The number of air conditioners 30 can be arbitrarily changed depending on the size of the server room R, the number of servers 2, etc.

[0017] Furthermore, the air conditioner 30 is equipped with an intake temperature sensor 31 that measures the temperature of the air being drawn in (air temperature) and an outlet temperature sensor 32 that measures the temperature of the air being blown out (cooled air).

[0018] Furthermore, the fan 20 of server 2 may also be used as part of the air conditioning equipment 3.

[0019] Furthermore, the server room R is equipped with a room temperature sensor 51 for measuring the room temperature of the server room R, and a humidity sensor 52 for measuring the humidity of the server room R.

[0020] The control device 10 controls the air conditioning equipment 3 so that the environment inside the server room R satisfies predetermined environmental conditions. These environmental conditions are, for example, target values ​​for the room temperature and humidity of the server room R.

[0021] Returning to Figure 1, the acquisition unit 101 of the evaluation support device 100 acquires the air temperature at the intake and exhaust points of the air conditioner 30, the air temperature at the intake and exhaust points of the air conditioner 2, and values ​​representing the heat generation of the server 2 for at least one air conditioner 30 and at least one server 2. These values ​​may be measured values, calculated values ​​obtained by CFD analysis (Computational Fluid Dynamics analysis), or a mixture of measured and calculated values. The acquisition unit 101 acquires these values, for example, under the instruction of an operator. In this embodiment, acquisition by the acquisition unit 101 includes input, reception, referencing of a database, etc.

[0022] The calculation unit 102, in the airflow model M1 of the server room R shown in Figure 3, solves the equations (equation (1)) that represent the relationship between heat quantity, air temperature, and airflow rate for the first airflow F1, second airflow F2, third airflow F3, and fourth airflow 4 as a system of simultaneous equations (as a heat balance calculation) using the values ​​acquired by the acquisition unit 101, thereby determining the heat quantities at the intake point ra, discharge point sa, intake point ca, and exhaust point ha.

[0023] In this embodiment, the airflow model M1 simulates the flow from the air conditioner 30 outlet → cold aisle CA → server 2 → hot aisle HA → air conditioner 30 intake using a one-dimensional system of point masses. That is, in the airflow model M1, the first airflow F1 is the airflow from the air outlet point sa of the air conditioner 30A (one or more air conditioners 30) to the intake point ca of the server 20A (one or more servers 2). The second airflow F2 is the airflow from the air exhaust point ha of the server 2A to the intake point ra of the air conditioner 30A. The third airflow F3 is the airflow from the air outlet point sa of the air conditioner 30A to the intake point ra of the air conditioner 30A. Furthermore, the fourth airflow F4 is the airflow from the exhaust point ha of server 2A to the intake point ca of server 2A. The third airflow F3 corresponds to the cold air leakage flow, and the fourth airflow F4 is the flow from the hot aisle HA to the cold aisle CA, relative to the warm air circulation flow. The intake point ra, discharge point sa, intake point ca, and exhaust point ha correspond to the respective mass points in the airflow model M1.

[0024] Furthermore, the intake point ra and discharge point sa can be evaluated, for example, by the average temperature of multiple air conditioners 30. Also, for the intake point ca and exhaust point ha, in the case of a single server evaluation, they can be evaluated using the intake and exhaust temperatures of the server 2 being evaluated, and in the case of multiple detections, they can be evaluated using the average temperature of the cold aisle CA and hot aisle HA. Additionally, the amount of heat generated by server 2A (power consumption) and the amount of heat generated by air conditioner 30A (cooling) are equal in absolute value.

[0025]

[0026] Equation (1) is an equation in which the left side is the heat quantity Q [W], and the right side is the product of density ρ [kg / m³] (the number after "^" represents an exponent), specific heat Cp [J / (kg·K)], volumetric flow rate V [m³ / s], and the temperature difference ΔT [K] between the point masses. The calculation unit 102 sets up equation (1) for the first to fourth air flows F1 to F4, and solves them as a system of equations using the values ​​acquired by the acquisition unit 101 to calculate the heat quantities at the intake point ra, discharge point sa, intake point ca, and exhaust point ha.

[0027] Furthermore, the output unit 103 outputs a diagram showing the relationship between the heat quantities at the intake point ra, outlet point sa, intake point ca, and exhaust point ha, as calculated by the calculation unit 102. Figure 4 shows an example of a diagram output by the output unit 103 (referred to as an environmental state diagram of the server room R). Figure D1 in Figure 4 shows the degree of deviation from the ideal state (a state with no cold air leakage or warm air circulation). Figure D1 also shows the change in heat quantity and the temperature difference at each point (outlet point sa, intake point ca, exhaust point ha, and intake point ra) from the outlet point sa, through the intake point ca, exhaust point ha, and back to the outlet point ra in that order. In this case, Figure D1 is a diagram in which one axis represents heat quantity Q and the other axis represents temperature difference ΔT, and the change in heat quantity and temperature difference at each point are shown from the discharge point sa, through the intake point ca, exhaust point ha, and suction point ra in that order, back to the discharge point sa, with the discharge point sa as the reference point. The output from the output unit 103 includes display on a display screen, recording and transmission in file format, printing with a printing device, etc.

[0028] As described above, the ideal state is one in which there is no cold air leakage between the air conditioner 30 and the server 2 (cold air is not drawn into the air conditioner 30), and there is no warm air circulation from the server 2 (exhaust air from the server 2 is not drawn into the server 2). In Figure D1, where the horizontal axis is heat quantity and the vertical axis is temperature difference, in the ideal state the line from the outlet point sa to the exhaust point ha is linear (a straight line shown by a dashed line) (outlet point sa = intake point ca and intake point ra = exhaust point ha). If there is cold air leakage or warm air circulation, the diagram will show a gap between the outlet point sa and the exhaust point ha. To approach the ideal state, the intake point ca should be brought closer to the outlet point sa, and the intake point ra should be brought closer to the exhaust point ha.

[0029] In Figure D1, both the heat quantity and temperature difference at the outlet point sa are set to zero. The intake point ca is plotted on a coordinate system corresponding to the heat quantity at the intake point ca (= heat quantity from warm air circulation) and the temperature difference between the air temperature at the intake point ca and the air temperature at the outlet point sa. The exhaust point ha is plotted on a coordinate system corresponding to the heat quantity at the exhaust point ha (= heat quantity obtained by adding the heat quantity at the intake point ca to the heat quantity generated) and the temperature difference between the air temperature at the exhaust point ha and the air temperature at the outlet point sa. The intake point ra is plotted on a coordinate system corresponding to the heat quantity obtained by subtracting the heat quantity from the heat quantity at the exhaust point ha (= heat quantity obtained by adding the heat quantity for cooling to the heat quantity at the outlet point sa (zero)) and the temperature difference between the air temperature at the intake point ra and the air temperature at the outlet point sa. Note that the form of the figure output by the output unit 103 is not limited to the form shown in Figure 4 (other examples will be described later).

[0030] Next, with reference to Figure 5 and other figures, an example of the operation of the evaluation support device 100 shown in Figure 1 will be described. Figure 5 shows an example of the processing flow of the evaluation support device 100 according to this embodiment. In the processing flow shown in Figure 5, first, information representing the air temperature (3D information) is prepared by measurement or CFD analysis (step S10). Also, information representing the amount of heat generated by the server 2 (1D information) is prepared by measurement (step S20). Note that the 3D information is information that has 3D coordinates as an attribute.

[0031] Next, in the evaluation support device 100's processing (step S30), processing related to heat balance calculation (step S300) is executed. First, the acquisition unit 101 acquires (inputs) the air temperature at the intake point ra, outlet point sa, intake point ca, and exhaust point ha, as well as the server heat generation amount (step S301). Figures 6 and 7 show examples of air temperatures at the intake point ra, outlet point sa, intake point ca (cold aisle CA), and exhaust point ha (hot aisle HA). Figure 6 is an example before structural improvement, and Figure 7 is an example after structural improvement. "〇" represents the values ​​of multiple measurement points (or calculation points), and the bar values ​​represent the average value. The temperature difference between the air conditioner outlet temperature and the cold aisle CA temperature is due to the effect of warm air circulation. Also, the temperature difference between the hot aisle HA temperature and the air conditioner intake temperature is due to the effect of cold air leakage.

[0032] Next, the calculation unit 102 sets up equation (1) for each airflow F1 to F4 of the airflow model M1 of the server room R (step S302). Next, the calculation unit 102 solves equation (1) for each airflow F1 to F4 as a system of simultaneous equations (step S303). Here, the state variables (temperature and heat quantity) of each point (suction point ra, discharge point sa, intake point ca, and exhaust point ha) and the state variables (flow rate) of each airflow F1 to F4 are obtained (step S304). Next, the output unit 305 outputs the respective diagrams (heat quantity change state diagram and heat quantity circulation diagram) (step S305).

[0033] In this embodiment, the heat change phase diagram is a diagram that adds some information to the contents of Figure D1, which was explained with reference to Figure 4. Figure 8 shows the heat change phase diagram D11 based on the air temperature etc. shown in Figure 6, and Figure 9 shows the heat change phase diagram D12 based on the air temperature etc. shown in Figure 7. Heat change phase diagrams D11 and D12 include information representing the heat quantity of warm air circulation (75 kW and 49 kW in this example), the heat output of server 2A (122 kW in this example), and the ratio η (38% and 29% in this example) of the maximum temperature rise (η = (heat quantity of warm air circulation) / (heat output + heat quantity of warm air circulation) [%]). The heat change phase diagram allows evaluation of the degree of achievement of the ideal state through heat balance calculation in the server room R. The smaller the area enclosed by each mass point (each node), the smaller the ratio of the maximum temperature rise accounted for by the cooling loss.

[0034] In this embodiment, the heat circulation diagram is a diagram that represents the flow of heat and air within the server room R using arrows, with the heat flow represented by arrows of varying thickness depending on the magnitude of the heat. Figure 10 shows the heat circulation diagram D21 based on the air temperature shown in Figure 6, and Figure 11 shows the heat circulation diagram D22 based on the air temperature shown in Figure 7. Furthermore, heat circulation diagrams D21 and D22 represent the variation in temperature distribution within the server room R, and are expressed with arrows of varying thickness depending on the magnitude of the heat to further visualize the heat change state diagram. In an ideal state, there are no arrows for cold air leakage and warm air circulation, and the thicker the arrow, the greater the loss of cooling energy.

[0035] (Effects) The evaluation support device 100 with the above configuration is an evaluation support device that supports the evaluation of airflow in a space R in which one or more air conditioners 30 and one or more devices 2 are installed, and comprises an acquisition unit 101 and a calculation unit 102. The acquisition unit 101 acquires the air temperature at the intake point ra and discharge point sa of the air conditioner 30 (air conditioner 30A), the air temperature at the intake point ca and exhaust point ha of the air device 2 (device 2A), and values ​​representing the heat generation amount of device 2 for at least one air conditioner 30 and at least one device 2. Furthermore, the calculation unit 102 solves the equations (equation (1)) that represent the relationship between heat quantity Q, air temperature (temperature difference ΔT), and air flow rate (V) for the first airflow F1 from the outlet point sa to the intake point ca, the second airflow F2 from the exhaust point ha to the intake point ra, the third airflow F3 from the outlet point sa to the intake point ra, and the fourth airflow F4 from the exhaust point ha to the intake point ca, using the acquired values, to determine the heat quantity Q at the intake point ra, outlet point sa, intake point ca, and exhaust point ha. With this configuration, it is possible to appropriately evaluate cold air leakage (third airflow F3) and warm air circulation (fourth airflow F4).

[0036] Furthermore, the evaluation support device 100 includes an output unit 103 that outputs the relationships between each heat quantity as diagrams (Figures D11, D12, D21, D22). This configuration makes it easy to understand the relationships between each heat quantity.

[0037] Furthermore, the diagrams showing the relationships between each heat quantity (Figures D11, D12, D21, D22) represent the degree of deviation from the ideal state. This configuration makes it easy to grasp the degree of deviation from the ideal state.

[0038] Furthermore, the diagrams showing the relationships between the various heat quantities (Figures D11 and D12) illustrate the change in heat quantity and the temperature difference at each point from the discharge point sa, through the intake point ca, exhaust point ha, and suction point ra in that order, back to the discharge point sa. This configuration allows for the understanding of the change in heat quantity.

[0039] Furthermore, the diagrams showing the relationships between heat quantities (Figures D11 and D12) represent the change in heat quantity and the temperature difference, with the outlet point sa as the reference point. These diagrams show the change in heat quantity and the temperature difference at each point from the outlet point sa back to the outlet point sa, passing through the intake point ca, exhaust point ha, and suction point ra in that order. This configuration allows for an understanding of the relationship between heat quantity and temperature difference.

[0040] Furthermore, the diagrams showing the relationships between the various heat quantities (Figures D21 and D22) represent the flow of heat and air within space R. This configuration allows us to understand the amount of heat circulation.

[0041] (Other Embodiments) Although embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments and may include design changes and the like that do not depart from the gist of the present disclosure.

[0042] (Computer Configuration) Figure 12 is a schematic block diagram showing the configuration of a computer according to at least one embodiment. The computer 90 includes a processor 91, main memory 92, storage 93, and interface 94. The evaluation support device 100 described above is implemented in the computer 90. The operation of each processing unit described above is stored in the storage 93 in the form of a program. The processor 91 reads the program from the storage 93, loads it into the main memory 92, and executes the above processing according to the program. The processor 91 also allocates storage areas in the main memory 92 corresponding to each of the storage units described above according to the program.

[0043] The program may be for realizing a part of the functions to be exerted by the computer 90. For example, the program may exert functions by combining with other programs already stored in the storage or by combining with other programs implemented in other devices. In other embodiments, the computer may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or instead of the above configuration. Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), FPGA (Field Programmable Gate Array), and the like. In this case, part or all of the functions realized by the processor may be realized by the integrated circuit.

[0044] Examples of the storage 93 include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, magneto-optical disk, CD-ROM (Compact Disc Read Only Memory), DVD-ROM (Digital Versatile Disc Read Only Memory), semiconductor memory, and the like. The storage 93 may be an internal medium directly connected to the bus of the computer 90, or may be an external medium connected to the computer 90 via the interface 94 or a communication line. Also, when this program is distributed to the computer 90 via a communication line, the computer 90 that has received the distribution may expand the program in the main memory 92 and execute the above processing. In at least one embodiment, the storage 93 is a non-transitory tangible storage medium.

[0045] <Appendix> The evaluation support device 100 described in this embodiment is understood as follows, for example.

[0046] (1) The evaluation support device 100 according to the first aspect is an evaluation support device that supports the evaluation of the air flow in a space where one or more air conditioners and one or more devices are installed. The evaluation support device 100 includes an acquisition unit 101 that acquires, for at least one of the air conditioners and at least one of the devices, each air temperature at the air intake point and the air outlet point of the air conditioner, each air temperature at the air intake point and the exhaust point of the device, and each value representing the heat generation amount of the device. The evaluation support device 100 further includes a calculation unit 102 that obtains the heat amounts at the intake point, the outlet point, the intake point, and the exhaust point by solving each equation representing the relationship between the heat amount, the air temperature, and the air flow rate for the first air flow from the outlet point to the intake point, the second air flow from the exhaust point to the intake point, the third air flow from the outlet point to the intake point, and the fourth air flow from the exhaust point to the intake point, using the acquired values. According to this aspect and each of the following aspects, it is possible to appropriately evaluate cold air leakage and warm air circulation.

[0047] (2) The evaluation support device 100 according to the second aspect is the evaluation support device 100 of (1), and includes an output unit that outputs the relationship of the heat amounts as a diagram.

[0048] (3) The evaluation support device 100 according to the third aspect is the evaluation support device 100 of (2), and the diagram represents the degree of deviation from an ideal state.

[0049] (4) The evaluation support device 100 according to the fourth aspect is the evaluation support device 100 of (2) or (3), and the diagram represents the change in heat amount and the temperature difference at each point from the outlet point, via the intake point, the exhaust point, and the intake point in this order, back to the outlet point.

[0050] (5) The evaluation support device 100 according to the fifth aspect is the evaluation support device 100 of (2) to (4), and the diagram has one axis representing the heat amount and the other axis representing the temperature difference, and represents the change in heat amount and the temperature difference at each point from the outlet point, via the intake point, the exhaust point, and the intake point in this order, back to the outlet point, with the outlet point as a reference.

[0051] (6) The evaluation support device 100 of the sixth embodiment is the evaluation support device 100 of (2) or (3), wherein the figure is a diagram showing the flow of heat and air in the space.

[0052] The evaluation apparatus, evaluation method, and program disclosed herein enable the proper evaluation of cold air leakage and warm air circulation.

[0053] 100...Evaluation support device 101...Acquisition unit 102...Calculation unit 103...Output unit ra...Intake point sa...Outlet point ca...Intake point ha...Exhaust point M1...Airflow model F1-F4...First to fourth airflows

Claims

1. An evaluation support device for assisting in the evaluation of airflow in a space in which one or more air conditioners and one or more devices are installed, comprising: an acquisition unit that acquires the air temperature at the intake and outlet points of the air conditioners, the air temperature at the intake and exhaust points of the devices, and values ​​representing the heat output of the devices for at least one of the air conditioners and at least one of the devices; and a calculation unit that calculates the heat output at the intake point, outlet point, intake point, and exhaust point by solving equations representing the relationship between heat output, air temperature, and airflow rate for a first airflow from the outlet point to the intake point, a second airflow from the exhaust point to the intake point, a third airflow from the outlet point to the intake point, and a fourth airflow from the exhaust point to the intake point, using the acquired values.

2. The evaluation support device according to claim 1, further comprising an output unit that outputs the relationships between the respective heat quantities as a diagram.

3. The above figure is a diagram showing the degree of deviation from the ideal state. The evaluation support device according to claim 2.

4. The evaluation support device according to claim 3, wherein the figure is a diagram showing the change in heat quantity and the temperature difference at each point from the discharge point, through the intake point, the exhaust point, and the suction point in that order, back to the discharge point.

5. The evaluation support device according to claim 4, wherein the figure shows the change in heat quantity and the temperature difference at each point, with one axis representing heat quantity and the other axis representing temperature difference, and is a figure that shows the change in heat quantity and the temperature difference at each point from the discharge point back to the discharge point, passing through the intake point, exhaust point, and suction point in that order.

6. The evaluation support device according to claim 2 or 3, wherein the figure is a diagram showing the flow of heat and air in the space.

7. A method for supporting the evaluation of airflow in a space in which one or more air conditioners and one or more devices are installed, comprising the steps of: acquiring the air temperature at the intake and outlet points of the air conditioners, the air temperature at the intake and exhaust points of the devices, and values ​​representing the heat output of the devices for at least one of the air conditioners and at least one of the devices; and determining the heat output at the intake point, outlet point, intake point, and exhaust point by solving equations representing the relationship between heat output, air temperature, and airflow rate for a first airflow from the outlet point to the intake point, a second airflow from the exhaust point to the intake point, a third airflow from the outlet point to the intake point, and a fourth airflow from the exhaust point to the intake point, using the acquired values.

8. A program for supporting the evaluation of airflow in a space in which one or more air conditioners and one or more devices are installed, comprising the steps of: obtaining the air temperature at the intake and outlet points of the air conditioners, the air temperature at the intake and exhaust points of the devices, and values ​​representing the heat output of the devices for at least one of the air conditioners and at least one of the devices; and causing a computer to perform the following steps: solving equations representing the relationship between heat output, air temperature, and airflow rate for a first airflow from the outlet point to the intake point, a second airflow from the exhaust point to the intake point, a third airflow from the outlet point to the intake point, and a fourth airflow from the exhaust point to the intake point, using the obtained values, to determine the heat output at the intake point, the outlet point, the intake point, and the exhaust point.

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