JP2018017469A - Cooling system, air conditioning control device and air conditioning control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling system, an air conditioning control device and an air conditioning control method for achieving energy saving.SOLUTION: A cooling system includes: racks 10 in which an electronic apparatus incorporating a fan for cooling the electronic apparatus itself; air conditioners 20, 25 for maintaining a suction temperature of the racks 10 at a prescribed temperature or below; temperature measurement parts 30 for detecting an increase and a decrease of the suction temperature of the racks 10; and a control device 40 for calculating a treatment heat quantity from a suction temperature, a blowout temperature, and an air quantity ratio of the air conditioners 20, 25, and instructing to operate or stop the air conditioners 20, 25 in accordance with a measurement value of the temperature measurement parts 30. The control device 40 changes a determination temperature of the temperature measurement parts 30 for determining whether the suction temperature of the racks 10 is an allowable temperature or below in accordance with a load factor of the racks.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooling system, an air conditioning control device, and an air conditioning control method, and more particularly to a cooling system, an air conditioning control device, and an air conditioning control method for controlling air conditioning in a server room.

  A large number of electronic devices (hereinafter referred to as “devices”) such as computers and servers are installed in the server room, and these devices are continuously operated day and night. Rack-mounting is the mainstream for installing equipment in server rooms. The rack mount system is a system in which racks (housings) for storing devices divided into functional units are stacked in a cabinet, and a large number of such cabinets are arranged in a line on the floor of a server room. Generally, the equipment stored in the rack sucks low-temperature air from the front, cools the inside of the equipment, and exhausts high-temperature air from the back.

  Since these devices may cause problems such as system shutdown when they reach a high temperature state, the server room is managed in a constant temperature environment by cooling the high-temperature air exhausted from the devices by multiple cooling devices. In particular, the rack suction temperature is controlled to be equal to or lower than a predetermined temperature. For this reason, the server room is provided with a temperature sensor for rack suction temperature and room temperature management.

  For example, in Patent Document 1, a computer calculates a temperature gradient in the space based on a thermal fluid simulation result performed on an analysis model of a space to be temperature controlled stored in a memory of the computer, Based on the area information indicating the installation area of the temperature sensor stored in the memory, the division target area including the installation area in the space is converted into a plurality of areas having a temperature difference within a predetermined range using the temperature gradient. There is disclosed a temperature sensor installation position determination method that divides and determines a temperature sensor installation position for each of the plurality of areas (refer to claim 1).

JP, 2014-120035, A

  However, even when the amount of heat generated from the equipment is small and it is not necessary to operate all the cooling devices, it is concerned that the suction temperature of the rack exceeds the predetermined temperature, and all the cooling devices are operated. Currently. Therefore, from the viewpoint of energy saving, there is a demand for a technique that maintains the suction temperature of the rack below a predetermined temperature and operates only the required number of cooling devices to reduce the power consumption of the entire system.

  Then, this invention makes it a subject to provide the cooling system, air-conditioning control apparatus, and air-conditioning control method which implement | achieve energy saving.

  In order to solve such a problem, a cooling system according to the present invention includes a rack in which an electronic device including a fan for cooling itself is installed, and a suction temperature of the rack for keeping the temperature below a predetermined temperature. An air conditioner, a temperature measurement unit that detects an increase and a decrease in the suction temperature of the rack, and calculates a processing heat amount from the suction temperature, blow-out temperature, and air volume ratio of the air conditioner, and a measured value of the temperature measurement unit And a control device for instructing operation or stop of the air conditioner according to the control device, wherein the control device determines whether the suction temperature of the rack is equal to or lower than an allowable temperature according to a load factor of the rack. The determination temperature of the temperature measuring unit is changed.

  The air conditioning control device according to the present invention includes a rack in which an electronic device including a fan for cooling itself is installed, an air conditioner for keeping the suction temperature of the rack below a predetermined temperature, An air-conditioning control device that controls the air conditioner in a room that includes a temperature measuring unit that detects an increase and a decrease in suction temperature, wherein the air-conditioning control device includes a suction temperature, an outlet temperature, and an air flow ratio of the air-conditioner. The processing heat amount is calculated from the above, and the determination temperature of the temperature measurement unit for determining whether the suction temperature of the rack is equal to or lower than the allowable temperature is changed according to the load factor of the rack, and the measured value of the temperature measurement unit is The operation or stop of the air conditioner is instructed according to the determination temperature.

  Further, the air conditioning control method according to the present invention includes a rack in which an electronic device including a fan for cooling itself is installed, an air conditioner for keeping the suction temperature of the rack below a predetermined temperature, A temperature measurement unit that detects an increase and a decrease in the suction temperature, and calculates the heat of treatment from the suction temperature, the blowout temperature, and the air flow ratio of the air conditioner, and the air conditioner of the air conditioner according to the measurement value of the temperature measurement unit A temperature control unit for determining whether or not the suction temperature of the rack is equal to or lower than an allowable temperature according to a load factor of the rack. It is characterized by changing the judgment temperature of

  According to the present invention, it is possible to provide a cooling system, an air conditioning control device, and an air conditioning control method that realize energy saving.

It is a top view which shows the structural example of the cooling system which concerns on 1st Embodiment. It is a graph explaining the determination method of a sensor temperature determination value. It is an example of the table data of the sensor temperature determination value of the cooling system which concerns on 1st Embodiment. It is a top view which shows the structural example of the cooling system which concerns on 2nd Embodiment. It is an example of the table data of the sensor temperature determination value of the cooling system which concerns on a modification.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.

<< First Embodiment >>
<Cooling system S>
The cooling system S according to the first embodiment will be described with reference to FIG. FIG. 1 is a plan view illustrating a configuration example of the cooling system S according to the first embodiment.

  As shown in FIG. 1, in a room (computer room, server room) R such as a data center, a rack (server rack) 10 that stores electronic devices (hereinafter referred to as “devices”) such as computers and servers is stored. Several are installed. The rack 10 uses a fan (not shown) built in the equipment to cool the inside of the equipment with air taken from the air supply surface with the front surface as the air supply surface and the back surface as the exhaust surface, and draws hot air from the exhaust surface. It is designed to exhaust.

  The rack 10 forms a rack row 12 in which the air supply surface and the exhaust surface are aligned, and a rack group 15 is formed in which the exhaust surfaces of the two rack rows 12 face each other. . The rack group 15 is arranged with the air supply surfaces of the rack row 12 facing each other. Accordingly, as shown in FIG. 1, the cold aisle CA in which the air supply surfaces of the rack row 12 face each other and the hot aisle in which the exhaust surfaces of the rack row 12 face each other are hot. The passages HA are alternately formed.

  The cooling system S according to the first embodiment includes an overall air conditioner 20, a local air conditioner 25, a temperature sensor 30, and a control device 40.

  As shown in FIG. 1, a plurality of general air conditioners 20 are installed around the room R. The whole air conditioner 20 is an air conditioner (Computer Room Air Conditioning; CRAC), takes in the high-temperature air from the hot aisle HA, cools it, and supplies the low-temperature air to the cold aisle CA. The operation / stop of the overall air conditioner 20 is controlled by the control device 40.

  As shown in FIG. 1, the high-temperature air (warm air) exhausted from the exhaust surface of the rack 10 is exhausted to the hot aisle HA, and sucked into the entire air conditioner 20 through the upper part of the chamber R. Then, the low-temperature air (cold air) cooled by the overall air conditioner 20 is supplied to each cold aisle CA through the double floor space of the room R, and is sucked from the air supply surface of the rack 10. In this way, the cooling system S cools the rack 10 installed in the room R, in other words, cools the equipment (not shown) housed in the rack 10.

  The local air conditioner 25 is installed in the vicinity of the equipment installed in the rack 10 and locally cools the heat generated by the equipment. That is, the local air conditioner 25 takes in and cools high-temperature air from the hot aisle HA in contact with the exhaust surface of the rack 10 to be cooled, and cools the low-temperature air to the cold aisle CA in contact with the air supply surface of the rack 10 to be cooled. Supply.

  In FIG. 1, the local air conditioners 25 are illustrated as being arranged in some of the rack rows 12, but the present invention is not limited to this, and the local air conditioners 25 are arranged in all the rack rows 12. May be.

  Each cold aisle CA is provided with a temperature sensor 30 so that the temperature of the low-temperature air sucked into the rack 10 from the air supply surface of the rack 10 can be measured. A detection signal of the temperature sensor 30 is output to the control device 40.

  The temperature sensor 30 is associated with the air supply surface of the rack group 15. In the configuration shown in FIG. 1, the air supply surface on both sides of the rack group 15 (in other words, the cold aisle in contact with the rack group 15). For CA), three measurement points of the temperature sensor 30 are provided.

  The control device 40 determines the operation / stop of the overall air conditioner 20 based on the temperature detected by the temperature sensor 30 and controls the operation / stop of the overall air conditioner 20. As illustrated in FIG. 1, the control device 40 includes a temperature acquisition unit 41, an operation state acquisition unit 42, a load factor acquisition unit 43, a determination temperature setting unit 44, an operation determination unit 45, a storage unit 46, It has.

  The temperature acquisition unit 41 acquires the temperature of the cold aisle CA detected by the temperature sensor 30.

  The operation state acquisition unit 42 acquires the current operation state of the general air conditioner 20 and the local air conditioner 25 (which general air conditioner 20 and local air conditioner 25 are operating or stopped).

  The load factor acquisition unit 43 acquires the load factor (%) of the thermal load released from the equipment accommodated in the rack 10 of the rack row 12 (hereinafter also referred to as “rack load factor”). Details of the load factor acquisition unit 43 will be described later.

  The determination temperature setting unit 44 sets a determination temperature based on a table (see FIG. 4 described later) stored in the storage unit 46 and the load factor information acquired by the load factor acquisition unit 43. Details of the determination temperature setting unit 44 will be described later.

  The operation determination unit 45 is based on the temperature information acquired by the temperature acquisition unit 41, the determination temperature set by the determination temperature setting unit 44, and the current operation state information acquired by the operation state acquisition unit 42. Judgment of running / stopping. That is, when the operation determination unit 45 determines that the temperature of the cold aisle CA detected by the temperature sensor 30 is sufficiently lower than a predetermined allowable value (determination temperature), the air conditioner (the overall air conditioner 20 and / or the local air conditioner 25). It is determined that the excessive air conditioner is to be stopped from the operating air conditioners acquired by the operation state acquisition unit 42, assuming that the operation of (2) is excessive. On the other hand, if the operation determination unit 45 determines that the temperature of the cold aisle CA detected by the temperature sensor 30 has approached a predetermined allowable value (determination temperature), the air conditioner (entire air conditioner 20 and / or local air conditioner 25). Judgment such as driving in addition.

  The storage unit 46 stores information used when the determination temperature setting unit 44 sets the determination temperature.

  And the control apparatus 40 controls the whole cooling system S by controlling the driving | operation / stop of each whole air conditioner 20 based on the determination result of the driving | operation determination part 45. FIG.

  In addition, although illustration is abbreviate | omitted, the temperature sensor (not shown) which detects the blowing temperature and suction temperature of the whole air conditioner 20 or the local air conditioner 25 is provided, and the detection signal of those temperature sensors also includes the control apparatus 40. Is output. Further, the air volume ratio (the current air volume with respect to the maximum air volume) of the overall air conditioner 20 and the local air conditioner 25 is also output to the control device 40. The air volume ratio may be obtained directly by a flow rate sensor or the like, or may be estimated from the control value of the fan motor. The control device 40 also collects these temperature information and air volume ratio information.

<Table>
As described above, the determination temperature set by the determination temperature setting unit 44 of the control device 40 is used when the operation determination unit 45 determines operation / stop of the overall air conditioner 20. Here, the storage unit 46 stores a table (see FIG. 3 described later) in which the rack load factor and the determination temperature are associated with each other, and the determination temperature setting unit 44 stores the table stored in the storage unit 46 ( The determination temperature is set based on the load factor information acquired by the load factor acquisition unit 43 and the load factor acquisition unit 43 described later. Hereinafter, the table stored in the storage unit 46 will be described.

  First, with a simulation device (not shown) composed of a workstation or the like, layout information of the target room R in advance (dimensions of the room R, equipment configuration, specifications, arrangement, etc. of the rack 10 and the air conditioners 20 and 25) Based on the above, air temperature simulation is performed. This simulation shows the rack 10 suction temperature and the temperature at the installation position of the temperature sensor 30 for each rack load factor and each air conditioner 20 and 25 operating condition (a combination of which air conditioner is operating or stopped). Calculate

  Then, from the result of the simulation of each condition, for each rack row 12, the maximum value of the temperature of the rack suction surface of that row (the maximum value of the rack suction surface temperature) and the detected temperature of the temperature sensor 30 that manages the rack row 12 The relationship between the maximum value (sensor temperature maximum value) is acquired.

  FIG. 2 shows the relationship between the rack suction surface temperature maximum value and the sensor temperature maximum value obtained from the simulation results for the rack load factor (%) and the operating conditions of the air conditioners 20 and 25. It is a conceptual diagram which shows an example plotted on the graph for every.

  Here, the horizontal axis represents the maximum rack suction surface temperature of the rack row 12 obtained by simulation, and the vertical axis represents the maximum sensor temperature value of the rack row 12. A certain operating condition of the air conditioners 20 and 25 corresponds to one graph (see FIG. 2), and one curve is drawn in the graph corresponding to the load factor of the rack. That is, from the simulation results, there are as many graphs as shown in FIG. 2 for the number of operating conditions of the air conditioners 20 and 25.

  Further, the load factor of the rack in the first embodiment is a load factor of the entire rack 10 in the room R. In FIG. 2, the relationship between the load factors Q1 to Qn is “Q1 <Q2 <... <Qn”, the simulation values at the load factor Q1 are plotted with white ellipses, and the simulation values at the load factor Q2 are plotted with white squares. And the simulation values at the load factor Qn are plotted with white triangles. The distribution of plots varies depending on the layout conditions of the room R.

  For example, in the example shown in FIG. 2, the temperature sensor 30 is installed at a location that is relatively susceptible to the influence of heated air from the rack 10, and the temperature sensor 30 has a temperature higher than the temperature at the rack suction surface (rack suction surface temperature). The case where the detected temperature (sensor temperature) becomes high is assumed.

  In such a configuration, since the amount of heat generated from the rack 10 is not so large at the load factor Q1 with a small load factor, the difference between the rack suction surface temperature and the temperature (sensor temperature) at the location where the temperature sensor 30 is installed is small. As the load factor increases (Q2... Qn), the difference between the rack suction surface temperature and the temperature (sensor temperature) at the location where the temperature sensor 30 is installed increases.

  From this result, as shown in FIG. 2, an approximate curve for each load factor is created, and the sensor temperature corresponding to the management temperature of the rack suction temperature (ie, the maximum value of the rack suction surface temperature) is calculated from the approximate curve and determined. Value.

  Here, in FIG. 2, the approximate curve of the load factor Q1 is indicated by a solid line, the approximate curve of the load factor Q2 is indicated by a one-dot chain line, and the approximate curve of the load factor Qn is indicated by a broken line. In addition, the approximate curve is created so as to be lower than all plotted points given by the rack suction surface temperature maximum value and the sensor temperature maximum value from the viewpoint of maintaining the approximate curve below the control temperature.

  Further, in FIG. 2, when the management temperature of the rack suction temperature is set to 27 ° C., the sensor temperature judgment value T1 is obtained at the load factor Q1, the sensor temperature judgment value T2 is obtained at the load factor Q2, and the sensor temperature judgment value is obtained at the load factor Qn. Tn. The relationship between the sensor temperature determination values T1 to Tn is “T1 <T2 <.

  FIG. 3 is an example of table data of sensor temperature determination values of the cooling system S according to the first embodiment.

  As described above, the sensor temperature determination value (determination temperature) is determined for the rack load factor, and a table in which the rack load factor and the sensor temperature determination value are associated with each other as shown in FIG. 3 is created. It is stored in the storage unit 46 of the control device 40. In addition, the table as shown in FIG. 3 is also stored in the memory | storage part 46 by the number of the operating conditions of the air conditioners 20 and 25 similarly to the graph shown in FIG. Further, when there are a plurality of management temperatures of the rack suction temperature, the table is stored in the storage unit 46 as much as the number is integrated.

  The table data (see FIG. 3) has been described as being created by a simulation device (not shown) and stored in the storage unit 46 of the control device 40, but is not limited thereto. For example, a computer constituting the control device 40 may also serve as a simulation device.

<Load factor>
The load factor acquisition unit 43 of the control device 40 calculates the load L [kW] of the air conditioner by the equation (1) from the collected blowout temperature Tout, suction temperature Tin, and air volume ratio RateQ [%]. calculate. Q ₁₀₀ is the air volume [m ³ / min] at an air volume ratio of 100%, Cp is the specific heat [kJ / kg · K], and α is the specific gravity of air [kg / m ³ ]. Further, since the heat load from the entire rack 10 in the room R is the total amount of heat processed by the air conditioners 20 and 25, the load factor Z [%] of the rack can be obtained by Expression (2). . L ₁₀₀ is the total load when the load factor of all racks is 100%.

_{L = Q 100 × (RateQ /} 100) × Cp × α × (Tin-Tout) / 60 ... (1)
Z = L / L ₁₀₀ (2)

  As described above, the load factor acquisition unit 43 can acquire the load factor Z of the rack. The load factor is calculated in units of the rack row 10 as in the rack suction surface temperature maximum value and the sensor temperature maximum value.

<Determination temperature>
The determination temperature setting unit 44 refers to the table data (see FIG. 3) stored in the storage unit 46 and sets the management temperature of the rack 10 from the load factor Z (load factor information) acquired by the load factor acquisition unit 43. The corresponding temperature sensor determination value is acquired, and the temperature is set as the determination temperature.

  Then, the operation determination unit 45 determines that the value of the temperature sensor 30 (temperature information acquired by the temperature acquisition unit 41) is equal to or less than the determination temperature (temperature sensor determination value) determined by the determination temperature setting unit 44. 20 run / stops are determined. And the control apparatus 40 controls the driving | operation / stop of the whole air conditioner 20 based on the determination result of the driving | operation determination part 45. FIG. Although the control device 40 has been described as controlling the operation / stop of the overall air conditioner 20 based on the determination result of the operation determination unit 45, the present invention is not limited to this, and the determination unit does not show the determination result. It may be configured to be displayed. Thereby, the operator (data center manager) manually operates / stops the entire air conditioner 20 in accordance with the determination result (operating state information) displayed on the display unit.

<Effect>
As described above, according to the cooling system S according to the first embodiment, the determination temperature (in the temperature sensor 30 for maintaining the rack suction temperature within a predetermined temperature (management temperature) for each load factor of the rack ( Temperature sensor determination value). Then, by controlling the operation / stop of the overall air conditioner 20 based on this determination temperature, it becomes possible to stop the excessive operation of the overall air conditioner 20 and realize energy saving.

<< Second Embodiment >>
<Cooling system S>
A cooling system SA according to the second embodiment will be described with reference to FIG. FIG. 4 is a plan view illustrating a configuration example of the cooling system SA according to the second embodiment. While the cooling system S according to the first embodiment (see FIG. 1) identifies the room R as one unit, the cooling system SA (see FIG. 4) according to the second embodiment has two rows of racks facing each other. 12 and the local air conditioner 25 that cools the rack row 12 is identified as one unit.

  In FIG. 4, the island is divided into four islands I1 to I4. Further, the control device 40A of the cooling system SA according to the second embodiment includes a temperature acquisition unit 41, an operation state acquisition unit 42, a load factor acquisition unit 43A, a determination temperature setting unit 44A, an operation determination unit 45, And a storage unit 46A.

  In addition, the load factor of the rack in the first embodiment is the load factor of the entire rack 10 in the room R, whereas the load factor of the rack in the second embodiment is within each island for each island I1 to I4. It differs in that it is the load factor of the rack 10. In other words, in the cooling system SA according to the second embodiment, a table (see FIG. 3) in which the rack load factor and the sensor temperature determination value (determination temperature) are associated with each other for each of the islands I1 to I4. It is created by the same method as that of the embodiment, and is stored in the storage unit 46A of the control device 40A.

  The load factor acquisition unit 43A obtains a load factor for each of the islands I1 to I4 by the same method as in the first embodiment. The determination temperature setting unit 44A sets the determination temperature based on the table stored in the storage unit 46A and the load factor acquired by the load factor acquisition unit 43A. And the driving | operation determination part 45 is the whole air conditioner so that the value (temperature information acquired by the temperature acquisition part 41) of the temperature sensor 30 may become below the determination temperature (temperature sensor determination value) determined by the determination temperature setting part 44A. 20 run / stops are determined. Then, the control device 40A controls the operation / stop of the overall air conditioner 20 based on the determination result of the operation determination unit 45. The control device 40A has been described as controlling the operation / stop of the overall air conditioner 20 based on the determination result of the operation determination unit 45, but is not limited to this, and a display unit that does not illustrate the determination result It may be configured to be displayed. Thereby, the operator (data center manager) manually operates / stops the entire air conditioner 20 in accordance with the determination result (operating state information) displayed on the display unit.

<Effect>
As described above, according to the cooling system SA according to the second embodiment, for each island I1 to I4, the rack suction temperature is maintained within a predetermined temperature (management temperature) for each rack load factor. The determination temperature (temperature sensor determination value) in the temperature sensor 30 can be obtained. Then, by controlling the operation / stop of the overall air conditioner 20 based on this determination temperature, it becomes possible to stop the excessive operation of the overall air conditioner 20 and realize energy saving.

≪Modification≫
The cooling systems S and SA according to the present embodiment (first and second embodiments) are not limited to the configuration of the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. is there.

  The cooling system S according to the first embodiment determines one determination temperature for the load factors Q1 to Qn in the entire room R. Further, the cooling system SA according to the second embodiment determines one determination temperature (that is, four determination temperatures for the room R) for the load factors Q1 to Qn for each of the islands I1 to I4. The determination of the determination temperature is not limited to this. For example, a load factor is set for each island I1 to I4, and a sensor temperature determination value (determination temperature) is set for each combination. It may be determined.

FIG. 5 is an example of table data of sensor temperature determination values of the cooling system according to the modification. As shown in FIG. 5, in a room R having a total number m of islands, a load factor of n patterns is given to each island, a simulation is performed for a total of n ^m combinations, and sensor temperature determination values are determined. Good.

  In the cooling systems S and SA according to the present embodiment, the general air conditioner 20 and the local air conditioner 25 are described as being installed in the room R. However, the present invention is not limited to this. The present invention can also be applied to a configuration in which only one of the local air conditioners 25 is installed in the room R.

  Further, the number and arrangement positions of the overall air conditioners 20 included in the cooling systems S and SA according to the present embodiment are not limited to the number and arrangement positions shown in FIGS. In addition, the general air conditioner 20 has been described as being installed in the room R. However, the present invention is not limited to this, and an air path that takes in high-temperature air from the hot aisle HA and a wind that supplies low-temperature air to the cold aisle CA. And the entire air conditioner 20 may be installed outside the room R (machine room).

Moreover, although control apparatus 40, 40A demonstrated as what controls or displays the operation / stop of the whole air conditioner 20, it is not restricted to this, Control / display the operation / stop of the local air conditioner 25 is performed. Alternatively, the operation / stop of the overall air conditioner 20 and the local air conditioner 25 may be controlled or displayed.

S, SA Cooling system 10 rack (electronic equipment)
12 rack rows 15 rack group 20 overall air conditioner 25 local air conditioner 30 temperature sensor (temperature measuring unit)
40, 40A Control device 41 Temperature acquisition unit 42 Operation state acquisition unit 43, 43A Load factor acquisition unit 44, 44A Determination temperature setting unit 45 Operation determination unit 46, 46A Storage unit HA Hot aisle CA Cold aisle R Room (room)
I1-I4 island

Claims (6)

A rack in which an electronic device including a fan for cooling itself is installed;
An air conditioner for keeping the suction temperature of the rack below a predetermined temperature;
A temperature measuring unit for detecting an increase and a decrease in the suction temperature of the rack;
A control device that calculates the heat of treatment from the suction temperature, the blowout temperature, and the air flow ratio of the air conditioner, and instructs the operation or stop of the air conditioner according to the measurement value of the temperature measurement unit,
The controller is
The cooling system according to claim 1, wherein the determination temperature of the temperature measurement unit for determining whether the suction temperature of the rack is equal to or lower than an allowable temperature is changed according to a load factor of the rack. The controller is
Data that associates the load factor of the rack with the determination temperature of the temperature measurement unit is stored,
Calculate the load factor of the rack from the calculated heat treatment amount of the air conditioner,
The cooling system according to claim 1, wherein a determination temperature of the temperature measurement unit is determined based on the data and the calculated load factor of the rack. The data stored in the control device is
For each load factor of the heat load released from the electronic device and the operating conditions of the air conditioner, calculate the suction temperature of the rack and the temperature at the installation location of the temperature measurement unit,
From the result of the calculation, for each load factor of the heat load, the temperature determination value at the installation location of the temperature measuring unit that can be determined that the suction temperature of the rack satisfies a predetermined management temperature or less is associated. The cooling system according to claim 2. 4. The cooling system according to claim 1, wherein the operation temperature or the stop of the air conditioner is instructed using the determination temperature of the temperature measurement unit as a control set value. 5. A rack in which an electronic device including a fan for cooling itself is installed, an air conditioner for keeping the suction temperature of the rack below a predetermined temperature, and temperature measurement for detecting an increase and a decrease in the suction temperature of the rack An air conditioning control device for controlling the air conditioner in a room comprising:
The air conditioning control device
Calculate the heat of treatment from the suction temperature, blowing temperature, and air volume ratio of the air conditioner,
According to the load factor of the rack, the determination temperature of the temperature measurement unit for determining whether the suction temperature of the rack is lower than the allowable temperature,
An air conditioning control device that instructs to operate or stop the air conditioner according to a measurement value of the temperature measuring unit and the determination temperature. A rack in which an electronic device including a fan for cooling itself is installed, an air conditioner for keeping the suction temperature of the rack below a predetermined temperature, and temperature measurement for detecting an increase and a decrease in the suction temperature of the rack And a control device that calculates the processing heat amount from the suction temperature, the blowing temperature, and the air flow ratio of the air conditioner, and instructs the operation or stop of the air conditioner according to the measurement value of the temperature measurement unit, A cooling system air conditioning control method comprising:
An air conditioning control method for a cooling system, wherein a determination temperature of the temperature measuring unit for determining whether the suction temperature of the rack is equal to or lower than an allowable temperature is changed according to a load factor of the rack.

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