JP6325204B2 - Equipment cooling system - Google Patents

Description

  The present invention relates to an apparatus cooling system.

  A data center or the like is provided with an air conditioner that cools a stored ICT device (information communication device). The air conditioner blows cold air to the vicinity of the rack in which the ICT device is stored, and is cooled by the ICT device taking in the cold air. In the ICT device, a CPU (Central Processing Unit), a power transformer, and other devices are generally housed. The heat generated from the accommodated equipment is radiated to the above-mentioned cold air directly or via a radiation fin or the like (hereinafter referred to as “air cooling method”).

  In recent years, the density of ICT devices has been increased, and the amount of heat generated from each device tends to increase. In order to operate the ICT apparatus stably, it is necessary to keep each device at a predetermined temperature. For this reason, when the amount of heat generation increases, it is necessary to increase the amount of cold air taken away from the ICT device by taking away the generated heat. However, it has been known that the heat dissipation method using air has a limit due to physical properties such as heat transfer coefficient of air.

  As a technique corresponding to this, a technique for directly cooling a device such as a CPU housed in an ICT apparatus with circulating water or a refrigerant (hereinafter referred to as “liquid cooling method”) has been proposed (for example, (See Patent Documents 1 and 2.) Since the liquid cooling method has a higher heat transfer coefficient than air, it is easier to increase the amount of heat dissipation than the air cooling method. Furthermore, the liquid cooling system can transfer heat directly outside the ICT device without air, the point that the temperature of the refrigerant can be set high, and the use of outside air heat is easy, and it is absorbed and recovered from the equipment. It has the advantage that heat can be used in other facilities and spaces, and is characterized by higher energy saving than air cooling.

  On the other hand, in an air-cooled cooling device, a plurality of air conditioners are installed in an area to be cooled where a plurality of ICT devices are arranged, and a predetermined air conditioner is assigned to each of a plurality of zones obtained by dividing the above-described area. Technology is known. In this case, a technique has been proposed in which data processing load information in a plurality of ICT devices is acquired, and data processing distribution control to the ICT devices is linked with cooling capacity control in the air conditioner to save energy in cooling. (For example, see Patent Documents 3 to 7.)

JP2013-003636A JP 2013-008888 A JP 2010-002148 A JP 2010-133625 A JP 2010-133626 A JP 2012-104576 A JP 2012-193877 A

  The liquid cooling system techniques described in Patent Documents 1 and 2 described above have a problem that a high-temperature failure is more likely to occur than in the air cooling system. In the liquid cooling system, a configuration in which cooling is performed by directly contacting a device such as a CPU that generates heat is common. In this case, it is difficult to bring the spare cooling system into direct contact with the equipment because there is little space in the ICT device. Therefore, it is difficult to arrange a spare cooling device that cools the ICT device when the cooling device of the ICT device fails, and there is a risk that a high-temperature failure occurs in the ICT device.

  On the other hand, in the case of the air cooling method, the air on the floor is cooled, and the cooled air is taken into the ICT device, so that it is easy to secure a space for arranging the spare cooling device. Therefore, even if the cooling device used at normal time fails, it is easy to continue cooling the ICT device using the spare cooling device, and it is easy to eliminate the risk of high temperature failure.

  In addition, there are many electronic / electrical equipments used in the ICT apparatus, and it is preferable to avoid contact with liquids such as water and refrigerant. For this reason, there is a problem that it is difficult to cool the ICT apparatus only with the liquid cooling type cooling apparatus.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an apparatus cooling system capable of ensuring reliability of temperature adjustment and reducing power consumption.

In order to achieve the above object, the present invention provides the following means.
The apparatus cooling system of the present invention circulates a liquid refrigerant that is in thermal contact with a plurality of arithmetic units arranged in a predetermined section, and cools the arithmetic unit, and includes a plurality of liquid-cooled cooling units that cool the arithmetic unit, An air-cooled cooling unit that cools the air in the predetermined compartment that is an atmosphere and is introduced into the computing device and used for cooling the computing device, and the cooling capacity of the liquid-cooled cooling unit and the air-cooled cooling unit A cooling control unit for controlling the liquid cooling type, a detection unit for detecting at least a liquid cooling margin that is a margin of cooling capacity in the liquid cooling type cooling unit, and the liquid cooling type cooling in which the liquid cooling margin is equal to or greater than a warning threshold value. When there is a unit, a linkage process for performing control to increase the amount of calculation performed by the arithmetic unit cooled by the liquid cooling type cooling unit having a large liquid cooling margin compared to other liquid cooling type cooling units And is provided with And features.

  According to the apparatus cooling system of the present invention, the liquid cooling type cooling unit has a cooling capacity and the margin (liquid cooling margin) is equal to or higher than a warning threshold that is a predetermined threshold. By increasing the amount of calculation performed by the calculation device cooled by the liquid cooling type cooling unit having a large margin, reliability of temperature adjustment can be ensured and power consumption can be reduced.

  That is, the liquid cooling type cooling unit having a relatively large liquid cooling margin as compared with the case where the arithmetic unit that increases the amount of calculation is an arithmetic device that is cooled by the liquid cooling type cooling unit having a relatively small liquid cooling margin. By using the arithmetic device cooled by the above, even if the amount of heat generated by the arithmetic device increases, it is easy to adjust the temperature by the amount of sufficient cooling capacity. In other words, it is easy to ensure the reliability of temperature adjustment.

  Reduced power consumption by selecting an arithmetic device that is cooled by a liquid-cooled cooling unit as compared to selecting an arithmetic device that is cooled by an air-cooled cooling unit as an arithmetic device that increases the amount of calculation. Is easier to plan.

  In the above invention, when the calculation amount performed by the plurality of calculation devices increases, the linkage processing unit calculates the calculation amount corresponding to the increase in the calculation device cooled by the liquid cooling type cooling unit having a large liquid cooling margin. Is preferably allocated.

  In this way, when the amount of computation performed by the whole of the plurality of computing devices increases, by selecting a computing device that is cooled by the liquid cooling type cooling unit having a large liquid cooling margin, the temperature adjustment is performed. It is possible to ensure reliability and reduce power consumption.

  In the above invention, the linkage processing unit includes the liquid cooling type cooling unit according to the arithmetic unit that is cooled by the liquid cooling type cooling unit having a large liquid cooling margin after the increased amount of calculation is distributed. The arithmetic unit that estimates the liquid cooling margin and is cooled by a liquid cooling type cooling unit having a large liquid cooling margin when the estimated margin that is the estimated liquid cooling margin is equal to or greater than the warning threshold. It is preferable to distribute the increased amount of calculation.

  Thus, when selecting an arithmetic device that distributes an increase in the amount of calculation, the liquid cooling margin after distribution is estimated, and only when the estimated liquid cooling margin is equal to or greater than the warning threshold, By increasing the amount of calculation, the reliability of temperature adjustment can be ensured. In other words, as a result of distributing the increase in the calculation amount, the liquid cooling margin related to the calculation device becomes less than the warning threshold value, in other words, there is no margin for the cooling capacity, and the occurrence of the problem that the temperature rises is suppressed in advance. Can do.

  In the above invention, when the liquid cooling margin is less than the warning threshold, or the estimated liquid cooling margin is less than the warning threshold, the linkage processing unit is cooled by the air cooling type cooling unit. It is preferable to perform control for allocating the increased amount of calculation to the arithmetic device and increasing the cooling capacity of the air-cooled cooling unit according to the distribution of the increased amount of calculation.

  As described above, when the liquid cooling margin or the estimated liquid cooling margin in the liquid cooling type cooling unit is less than the warning threshold value, the increased amount of calculation is distributed to the arithmetic device cooled by the air cooling type cooling unit. Thus, the reliability of temperature adjustment can be ensured. In general, it is difficult for the liquid cooling type cooling unit to cope with the amount of heat exceeding the cooling capacity as compared with the air cooling type cooling unit. Therefore, when a heat load equal to or exceeding the cooling capacity of the liquid cooling type cooling unit is applied, the increase in the amount of calculation is distributed to the arithmetic unit cooled by the air cooling type cooling unit to increase the temperature. It becomes easy to suppress.

  In the above invention, the detection unit detects an alarm issued when a malfunction occurs from the liquid cooling type cooling unit, and the linkage processing unit detects the liquid cooling type cooling related to the alarm when the alarm is detected. The liquid cooling type cooling unit having a large liquid cooling margin is selected from the liquid cooling type cooling unit different from the liquid cooling type cooling unit related to the alarm from the arithmetic device cooled by the unit. It is preferable to perform control to distribute the calculation amount to the arithmetic device or the arithmetic device cooled by the air-cooling type cooling unit.

  Thus, when a problem occurs in the liquid cooling type cooling unit, the calculation performed in the calculation device related to the problem, the calculation device cooled by the liquid cooling type cooling unit with a large liquid cooling margin, or By distributing to the arithmetic unit cooled by the air-cooling type cooling unit, it is possible to suppress the occurrence of a high temperature failure.

In the above-mentioned invention, it is preferable that a notification unit for notifying the alarm is further provided when an alarm is issued from the liquid cooling type cooling unit when a malfunction occurs.
By providing the notification unit in this manner, it is possible to notify the operator of the apparatus cooling system that a problem has occurred in the liquid cooling type cooling unit, and to solve the problem at an early stage. As a result, it is possible to suppress an increase in the burden on other liquid-cooled cooling units and air-cooled cooling units, and to ensure the reliability of temperature adjustment.

  In the above invention, the detection unit includes a frequency measurement unit that measures a drive frequency of a circulation pump that circulates the liquid refrigerant, and the liquid cooling margin is obtained based on at least the drive frequency of the circulation pump. Is preferred.

  Thus, by calculating | requiring a liquid cooling margin based on the drive frequency of a circulation pump, the precision of the liquid cooling margin calculated | required can be improved. Therefore, the amount of increase in the amount of calculation performed based on the liquid cooling margin is more appropriately distributed, and the reliability of temperature adjustment can be ensured.

  In the above invention, the detection unit further includes a surface temperature sensor that measures a cooling target surface temperature that is a temperature of a surface that is in thermal contact with the liquid refrigerant in the arithmetic device, and the liquid cooling margin is: It is preferable that it is obtained based on at least the surface temperature to be cooled and the driving frequency of the circulation pump.

  Thus, by calculating | requiring a liquid cooling margin based on the cooling target surface temperature and the drive frequency of a circulation pump, the precision of the liquid cooling margin calculated | required can be raised. Therefore, the amount of increase in the amount of calculation performed based on the liquid cooling margin is more appropriately distributed, and the reliability of temperature adjustment can be ensured.

  In the above invention, the detection unit includes a refrigerant temperature sensor that measures a temperature of the liquid refrigerant or a refrigerant return temperature difference that is a temperature difference between the liquid refrigerant before and after being in thermal contact with the arithmetic device. The liquid cooling margin is preferably obtained based on at least the temperature of the liquid refrigerant or the refrigerant return temperature difference.

  Thus, by calculating | requiring a liquid cooling margin based on the temperature of a liquid refrigerant, or a refrigerant | coolant return temperature difference, the precision of the liquid cooling margin calculated | required can be improved. Therefore, the amount of increase in the amount of calculation performed based on the liquid cooling margin is more appropriately distributed, and the reliability of temperature adjustment can be ensured.

  In the above invention, the liquid cooling margin is determined based on at least the temperature of the liquid refrigerant, the driving frequency of the circulation pump, and the cooling capacity of the liquid cooling type cooling unit calculated based on the specific heat of the liquid refrigerant. It is preferred that

  Thus, the liquid cooling margin based on at least the temperature of the liquid refrigerant, the driving frequency of the circulation pump (in other words, the flow rate of the liquid refrigerant), and the cooling capacity of the liquid cooling type cooling unit calculated based on the specific heat of the liquid refrigerant. By calculating the degree, the accuracy of the required liquid cooling margin can be increased. Therefore, the amount of increase in the amount of calculation performed based on the liquid cooling margin is more appropriately distributed, and the reliability of temperature adjustment can be ensured.

  According to the apparatus cooling system of the present invention, the liquid cooling type cooling unit has a sufficient cooling capacity and the liquid cooling margin is equal to or greater than the warning threshold value, and is performed by an arithmetic unit having a large liquid cooling margin. Since the control for increasing the amount is performed, the reliability of the temperature adjustment is ensured and the power consumption can be reduced.

It is a model diagram which shows the structure of the apparatus cooling system which concerns on one Embodiment of this invention. It is a block diagram explaining the control part of FIG. It is a flowchart explaining control when a data processing amount increases. It is a flowchart explaining the control when a liquid cooling margin decreases.

An apparatus cooling system according to an embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, description will be made by applying to an example in which the apparatus cooling system 1 according to the present invention is used for air conditioning of a data center. As shown in FIG. 1, the data center includes a computing device 60L and a computing device 60A such as a number of servers and computers constituting IT (information technology) devices and ICT (information communication technology) devices. The cold aisle C and the hot aisle H are housed in a rack 65L and a rack 65A that are arranged to form a cold aisle C and a hot aisle H therein. Note that the rack 65L stores the arithmetic device L, and the rack 65A stores the arithmetic device 60A. The apparatus cooling system 1 is used to process a large amount of heat generated from the arithmetic device 60L and the arithmetic device 60A.

  The apparatus cooling system 1 includes a liquid cooling type cooling device (liquid cooling type cooling unit) 10 that cools the arithmetic unit 60L, an air cooling type cooling unit (air cooling type cooling unit) 30 that cools the arithmetic unit 60L and the arithmetic unit 60A, and the like. The control units (cooling control unit, linkage processing unit) 40 for controlling the arithmetic devices 60L and 60A, the liquid cooling type cooling device 10 and the air cooling type cooling device 30 are mainly provided.

  The liquid cooling type cooling device 10 circulates a liquid refrigerant to cool the computing device 60L. The liquid cooling type cooling device 10 includes a plurality of rack-side circulation systems 11 that are arranged in each of the racks 65L and in which the liquid refrigerant circulates, and a cooling unit that is arranged outside the floor F and generates cold heat that cools the arithmetic device 60L. 21 and a plurality of rack-side circulation systems 11 and a cooling unit 21 are mainly provided, and a main circulation system 22 through which liquid refrigerant circulates is mainly provided.

  The rack side circulation system 11 is disposed on the surface of the rack 65L on the hot aisle H side. The rack-side circulation system 11 is a portion that is in contact with an electronic component that generates heat, such as a CPU (central processing unit), in the arithmetic device 60L so as to be able to transfer heat, and absorbs heat from the circulating refrigerant such as the CPU. 12 and a heat exchange unit 13 that exchanges heat between the refrigerant circulating in the main circulation system 22 and a circulation pump 14 that circulates the refrigerant are mainly provided.

  The main circulation system 22 releases the heat of the refrigerant in the cooling unit 21, the flow path through which the refrigerant circulates between the heat exchange unit 13 of the rack-side circulation system 11, the cooling unit 21, the main pump 23 that circulates the refrigerant, and the cooling unit 21. The heat dissipating part 24 is mainly provided. In the present embodiment, the main circulation system 22 is disposed on the upper side of the rack 65L, and is applied to a configuration in which heat is exchanged with each refrigerant in the heat exchange unit 13 that is also disposed on the upper end of the rack 65L. explain. The main circulation system 22 may be arranged on the upper side of the rack 65L or may be arranged on the lower side of the rack 65L, and the arrangement position thereof is not particularly limited.

  The cooling unit 21 generates cold heat, in other words, releases heat of the CPU and the like carried through the main circulation system 22 and the rack-side circulation system 11 to the outside. Therefore, a device that realizes a refrigeration cycle may be disposed inside the cooling unit 21 or may be provided with a blowing means that simply sends outside air to the heat radiating unit 24, and the configuration is particularly limited. Not what you want.

  The air-cooling type cooling device 30 cools the indoor air on the floor F, and cools the arithmetic device 60L and the arithmetic device 60A via the cooled indoor air. The air-cooled cooling device 30 mainly includes an AHU (air handling unit) 31 arranged in the floor F constituting the refrigeration cycle, and an outdoor unit (not shown) arranged outside the floor F. Is provided. The AHU 31 includes an evaporator 32 that evaporates when the refrigerant circulating in the refrigeration cycle takes away the heat of the room air, and sucks room air from the floor F, and blows out the cooled room air to the underfloor space FU of the floor F. The blower 33 is mainly provided.

  In other words, the arithmetic device 60L is an ICT device or the like that is cooled using both the liquid cooling type cooling device 10 and the air cooling type cooling device 30, and the arithmetic device 60A is an ICT device that is cooled using the air cooling type cooling device 30. Etc.

  Here, the floor F has a double floor structure provided with an underfloor space FU. The cooled indoor air supplied to the underfloor space FU is blown out from the floor surface of the cold aisle C to the indoor space FR of the floor F. The indoor air supplied to the cold aisle C is guided to the inside by a fan 61 provided in the arithmetic device 60L and the arithmetic device 60A, and cools electronic components that generate heat, such as a CPU (central arithmetic unit). The cooled indoor air is blown out from the arithmetic device 60L and the arithmetic device 60A to the hot aisle H, and is sucked into the AHU 31 again.

  The control unit 40 controls the apparatus cooling system 1 in an integrated manner, and is a microcomputer having a CPU (Central Processing Unit), ROM, RAM, input / output interface, and the like. The control program stored in the ROM or the like causes the CPU to function as the arithmetic control unit 41 that is the cooling control unit or the linkage processing unit, and causes the ROM or the like to function as the storage unit 42. Details of control of the apparatus cooling system 1 by the control unit 40 will be described later.

  The control unit 40 includes a measurement signal of the surface temperature of the cooling target measured by the surface temperature sensor (detection unit) 51, a measurement signal of the refrigerant temperature measured by the feed refrigerant temperature sensor 52, and a measurement signal of the return refrigerant temperature sensor 53. The coolant temperature measurement signal, the circulation pump drive frequency measured by the frequency measurement unit 54, and an alarm signal issued from the liquid cooling type cooling device 10 are mainly input. On the other hand, control signals are output from the control unit 40 to the arithmetic device 60L, the arithmetic device 60A, the air cooling type cooling device 30, and the liquid cooling type cooling device 10.

  The surface temperature sensor 51 is an electronic device that generates heat, such as a CPU, in the arithmetic device 60L, and is a sensor that measures the temperature of the surface that is in thermal contact with the heat absorbing unit 12. The feed refrigerant temperature sensor 52 is a sensor that measures the temperature of the refrigerant that flows through the rack-side circulation system 11 of the liquid-cooled cooling device 10 and flows toward the heat absorption unit 12. The return refrigerant temperature sensor 53 is a sensor that flows through the rack-side circulation system 11 and measures the temperature of the refrigerant that has flowed out of the heat absorption unit 12.

  The alarm signal issued from the liquid cooling type cooling device 10 includes a signal notifying the failure of the liquid cooling type cooling device 10 and a signal notifying the occurrence of an emergency. The failure is a situation in which the operation of the liquid cooling type cooling device 10 becomes impossible, and the emergency situation is a state in which a temperature abnormality in each part of the liquid cooling type cooling device 10, a refrigerant leak, a stop of each pump, or the like has occurred.

  Next, control in the apparatus cooling system 1 having the above configuration will be described. First, control when the amount of data processing in the arithmetic devices 60A and 60L increases will be described with reference to the flowchart of FIG.

  When data processing (in other words, arithmetic processing) in arithmetic device 60A and arithmetic device 60L is started and operation of device cooling system 1 is started, cooling of arithmetic device 60A and arithmetic device 60L by air-cooled cooling device 30 starts. At the same time, the cooling of the arithmetic device 60L by the liquid cooling type cooling device 10 is started.

  When the operation of the device cooling system 1 is started as described above, the calculation unit 41 of the control unit 40 performs a process of determining whether or not the data processing amount in the calculation device 60A and the calculation device 60L has increased (S11). . If the data processing amount has not increased (in the case of NO), the process returns to S11 again to determine whether or not the data processing amount has increased.

  When it is determined that the data processing amount has increased (in the case of YES), the calculation unit 41 performs a process of determining whether or not there is a liquid cooling margin greater than the warning threshold (S12). Here, the liquid cooling margin is a coefficient representing the margin of cooling capacity in the liquid cooling type cooling device 10. The warning threshold value is a threshold value stored in advance in the storage unit 42, and has a value larger than an alarm threshold value that increases the possibility of a high-temperature failure occurring in the calculation unit 41.

The liquid cooling margin described above is obtained by calculation based on the following equation (1). M in the formula (1) below is liquid-cooled margin, X _a is a processing load (or the driving frequency of the circulation pump 14), the upper limit of X ₀ is the processing load (or drive frequency limit of the circulation pump 14) It is. S _i is the cooling target surface temperature, and S ₀ is the upper limit of the cooling target surface temperature. α and β are coefficients.

なお、Ｓ_ｉの冷却対象表面温度は表面温度センサ５１から入力される測定信号に基づく値であり、Ｓ_０の冷却対象表面温度の上限は記憶部４２に予め記憶されている値である。

The cooling target surface temperature of the S _i is a value based on the measurement signal input from the surface temperature sensor 51, the upper limit of the cooling target surface temperature of the S ₀ is the value which is previously stored in the storage unit 42.

  The calculation unit 41 may sequentially calculate the liquid cooling margin based on the equation (1) stored in the storage unit 42, or a map related to the liquid cooling margin previously calculated using the equation (1). You may memorize | store in the memory | storage part 42, and may obtain | require the calculating part 41 using the said map.

The equation for obtaining the liquid cooling margin may be the above equation (1) or the following equation (2), and the content of the equation is not particularly limited. In equation (2), P (S _i ) is a fine function. More specifically, the function is a function in which the value of P (S _i ) is small (eg, 0) when the cooling target surface temperature S _i exceeds a predetermined threshold.

Ｓ１２の処理において液冷余裕度がワーニング閾値以上であると判定された場合（ＹＥＳの場合）には、演算部４１はさらに、液冷余裕度が最大の演算装置６０Ｌが存在するか否かを判定する処理を行う（Ｓ１３）。液冷余裕度が最大の演算装置６０Ｌが存在する場合（ＹＥＳの場合）には、演算部４１は、当該演算装置６０Ｌへ増加したデータ処理量を配分した後の液冷余裕度である推定余裕度を求める処理を行う（Ｓ１４）。

When it is determined in the process of S12 that the liquid cooling margin is equal to or greater than the warning threshold value (in the case of YES), the calculation unit 41 further determines whether or not there is an arithmetic device 60L having the maximum liquid cooling margin. A determination process is performed (S13). When there is a computing device 60L with the maximum liquid cooling margin (in the case of YES), the computing unit 41 estimates the liquid cooling margin after allocating the increased data processing amount to the computing device 60L. Processing for obtaining the degree is performed (S14).

  Specifically, the estimated margin is obtained using the learning ability of the control unit 40. The storage unit 42 of the control unit 40 stores data on the change in the liquid cooling margin in the arithmetic device 60L when the data processing amount is increased in the past. It is preferable that the accumulated data includes contents of increased data processing, contents capable of identifying a change in the liquid cooling margin in each of the plurality of arithmetic devices 60L, and the like.

  The control unit 40 acquires data representing a change in the liquid cooling margin in a similar situation from the storage unit 42 based on the content and processing amount of the increased data processing, information specifying the distribution destination arithmetic device 60L, and the like. Based on this data, an estimated margin is obtained.

  Thereafter, the calculation unit 41 performs a process of determining whether or not the estimated margin is equal to or greater than the above-described warning threshold (S15). When it is determined that the estimated margin is equal to or greater than the warning threshold (in the case of YES), the calculation unit 41 performs a process of allocating the increased data processing amount to the calculation device 60L having the maximum liquid cooling margin (S16). . After the distribution process is performed, the process returns to S11 again and the above process is repeated.

  In addition, after performing the process which distributes the increased data processing amount of S16 to the arithmetic device 60L with the largest liquid cooling margin, the drive frequency in the circulation pump 14 which concerns on the said arithmetic device 60L is increased, and the flow volume of the circulating refrigerant | coolant You may perform control which increases. Furthermore, after performing control to increase the drive frequency in the circulation pump 14, processing for allocating the increased data processing amount may be performed. By doing so, it becomes easy to cope with a sudden increase in the amount of heat generated in the arithmetic device 60L to which the increased data processing amount is allocated.

  Further, in the data processing distribution process performed in S16, when there is an arithmetic device 60L having a liquid cooling margin greater than or equal to a predetermined threshold, in other words, an arithmetic device 60L having a data processing amount smaller than a desired amount and a low operation rate. May distribute the data processing performed in the arithmetic device 60L to the other arithmetic devices 60L and 60A. In other words, the operating device 60L that is operating may be offset. By doing in this way, the cooling efficiency of arithmetic unit 60L and arithmetic unit 60A can be raised.

  On the other hand, when it is determined in step S12 that the liquid cooling margin is less than the warning threshold (in the case of NO), it is determined in step S13 that there is no arithmetic device 60L having the maximum liquid cooling margin. In the case (in the case of NO), and when it is determined in the process of S15 that the estimated margin is less than the warning threshold (in the case of NO), the control unit 40 distributes the increased data processing amount to the arithmetic device 60A. (S17).

  Thereafter, the control unit 40 performs a process of outputting a control signal for increasing the cooling capacity to the air cooling type cooling device 30 (S18). Even if the heat generation amount in the arithmetic device 60A to which the increased data processing amount is distributed by this processing is increased, the cooling capacity through the indoor air on the floor F is increased, so that the temperature increase of the arithmetic device 60A can be suppressed.

  In addition, after performing the process which distributes the increased data processing amount of S17 as mentioned above, you may perform control which increases the cooling capacity of the air-cooling type cooling device 30 of S18, and conversely of the air-cooling type cooling device 30. After performing control to increase the cooling capacity, processing for allocating the increased data processing amount may be performed. By doing so, it becomes easy to cope with a sudden increase in the amount of heat generated in the arithmetic device 60A to which the increased data processing amount is allocated.

Next, the control when the liquid cooling margin is reduced due to the occurrence of a malfunction in the liquid cooling type cooling apparatus 10 will be described with reference to the flowchart of FIG.
When the operation of the device cooling system 1 is started, the calculation unit 41 of the control unit 40 performs a process of determining whether or not the liquid cooling margin in all the calculation devices 60L is equal to or greater than a warning threshold (S21). Here, the liquid cooling margin is obtained using a method similar to the calculation method described above. When it is determined that all the liquid cooling margins are equal to or greater than the warning threshold value (in the case of YES), the process returns to S21 again, and the same processing is performed.

  In the process of S21, it may be determined whether or not the liquid cooling margins in all the arithmetic devices 60L are equal to or greater than the warning threshold value, or the average value of the liquid cooling margins in all the arithmetic devices 60L is obtained, You may determine whether the said average value is on a warning threshold value.

  When it is determined in S21 that all the liquid cooling margins are not equal to or greater than the warning threshold (in the case of NO), in other words, when it is determined that there is a liquid cooling margin below the warning threshold, A process is performed to determine whether or not there is an arithmetic device 60L whose margin is a warning threshold (S22).

  When it is determined in S22 that there is an arithmetic device 60L having a liquid cooling margin equal to or greater than the warning threshold (in the case of YES), the arithmetic unit 41 is performed by the arithmetic device 60L having a liquid cooling margin less than the warning threshold. A control signal for distributing the data processing to the arithmetic devices 60L having a liquid cooling margin higher than the others (above the warning threshold) is output to these arithmetic devices 60L (S23). Thereafter, the control unit 40 returns to S21 and repeats the above processing.

  On the other hand, when it is determined in S22 that there is no arithmetic device 60L whose liquid cooling margin is equal to or greater than the warning threshold value (in the case of NO), the arithmetic unit 41 calculates the arithmetic device whose liquid cooling margin is less than the warning threshold value. A control signal for distributing the data processing performed at 60L to the arithmetic device 60A is output to the arithmetic device 60L and the arithmetic device 60A (S24).

  Next, the control part 40 performs the process which outputs the control signal which increases cooling capacity with respect to the air cooling type cooling device 30 (S25). Even if the heat generation amount in the arithmetic device 60A to which the increased data processing amount is distributed by this processing increases, the temperature rise of the arithmetic device 60A can be suppressed. Thereafter, the control unit 40 returns to S21 and repeats the above processing.

  When a problem occurs in the liquid cooling type cooling device 10, control may be performed to distribute data processing to the arithmetic device 60L having a liquid cooling margin equal to or greater than the warning threshold as in the above-described embodiment. Control for distributing data processing to the arithmetic device 60A may be performed, and selection can be made in a timely manner according to the operation policy of the device cooling system 1.

  As in the process of S21 of the above-described embodiment, the occurrence of a malfunction in the liquid cooling type cooling device 10 may be indirectly detected by a decrease in the liquid cooling margin. Instead of the process of S21, liquid cooling type cooling is performed. The apparatus 10 is provided with a notification unit 55 that issues a warning by detecting the occurrence of a failure or emergency such as temperature abnormality of each part, refrigerant leakage, stoppage of the circulation pump 14 or the like, and determines whether or not the warning is notified. You may perform the process to do.

  According to the apparatus cooling system 1 having the above-described configuration, the liquid cooling type cooling apparatus 10 has a cooling capacity and a liquid cooling margin that is equal to or higher than a warning threshold that is a predetermined threshold. By increasing the amount of computation performed by the computing device 60L cooled by the liquid cooling type cooling device 10 having a large degree, reliability of temperature adjustment can be ensured and power consumption can be reduced.

  That is, the liquid crystal cooling with a relatively large liquid cooling margin is used as compared with the case where the arithmetic device 60L that increases the amount of calculation is an arithmetic device 60L that is cooled by the liquid cooling type cooling device 10 with a relatively small liquid cooling margin. By using the arithmetic device 60L cooled by the type cooling device 10, even if the amount of heat generated by the arithmetic device 60L is increased, the temperature can be easily adjusted by a large margin of the cooling capacity. In other words, it is easy to ensure the reliability of temperature adjustment.

  Compared to the case where the arithmetic device 60A cooled by the air-cooled cooling device 30 is selected as the arithmetic device that increases the amount of calculation, the arithmetic device 60L cooled by the liquid-cooled cooling device 10 is selected and consumed. This makes it easier to reduce power consumption.

  When the amount of calculation performed by the plurality of arithmetic devices 60L and 60A increases, by selecting the arithmetic device 60L that is cooled by the liquid cooling type cooling device 10 having a large liquid cooling margin, the increase is The reliability of adjustment can be ensured and the power consumption can be reduced.

  When selecting the computing device 60L that distributes the increased amount of computation, the liquid cooling margin after distribution is estimated, and the computation in the computing device 60L is performed only when the estimated liquid cooling margin is equal to or greater than the warning threshold. By increasing the amount, the reliability of temperature adjustment can be ensured. That is, as a result of distributing the increase in the calculation amount, the liquid cooling margin related to the calculation device 60L becomes less than the warning threshold, in other words, there is no cooling capacity margin, and the occurrence of a problem that the temperature rises is suppressed in advance. be able to.

  When the liquid cooling margin in the liquid cooling type cooling device 10 or the estimated liquid cooling margin is less than the warning threshold value, the increased amount of calculation is distributed to the arithmetic device 60A cooled by the air cooling type cooling device 30. Thus, the reliability of temperature adjustment can be ensured. In general, the liquid cooling type cooling device 10 is difficult to cope with the heat amount exceeding the cooling capacity as compared with the air cooling type cooling device 30. Therefore, when a thermal load equal to or exceeding the cooling capacity of the liquid cooling type cooling device 10 is applied, by distributing the increased amount of calculation to the calculation device 60A cooled by the air cooling type cooling device 30, It becomes easy to suppress the rise in temperature.

  When a failure occurs in the liquid cooling type cooling device 10, the calculation performed by the calculation device 60L related to the failure is distributed to the calculation device 60L cooled by the liquid cooling type cooling device 10 having a large liquid cooling margin. By doing so, it is possible to suppress the occurrence of high temperature failure.

  By providing the notification unit 55, it is possible to notify the operator of the apparatus cooling system 1 that a problem has occurred in the liquid cooling type cooling apparatus 10, and to solve the problem at an early stage. As a result, it is possible to suppress an increase in the burden on the other liquid cooling type cooling device 10 and the air cooling type cooling device 30, and to ensure the reliability of temperature adjustment.

  Thus, by calculating | requiring a liquid cooling margin based on Formula (1) or Formula (2), the precision of the calculated | required liquid cooling margin can be improved. Therefore, the amount of increase in the amount of calculation performed based on the liquid cooling margin is more appropriately distributed, and the reliability of temperature adjustment can be ensured.

  Note that the liquid cooling margin may be obtained based on the formula (1) or the formula (2) as in the above-described embodiment, or the liquid cooling margin based on the temperature of the liquid refrigerant or the refrigerant return temperature difference. The liquid cooling margin may be obtained based on the temperature of the liquid refrigerant, or the liquid cooling temperature calculated based on the temperature of the liquid refrigerant, the driving frequency of the circulation pump 14 (in other words, the flow rate of the liquid refrigerant), and the specific heat of the liquid refrigerant. The liquid cooling margin may be obtained based on the cooling capacity of the apparatus 10, and is not particularly limited.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the air conditioning system according to the present invention is applied to the example of using the data center. However, the object to be used is not limited to the data center, and can be applied to other facilities. is there.

  DESCRIPTION OF SYMBOLS 1 ... Device cooling system, 10 ... Liquid cooling type cooling device (liquid cooling type cooling unit), 14 ... Circulation pump, 30 ... Air cooling type cooling device (air cooling type cooling unit), 40 ... Control unit (cooling control unit, linkage processing) Part), 51 ... surface temperature sensor (detection part), 54 ... frequency measurement part, 55 ... notification part, 60L, 60A ... arithmetic unit, F ... floor (predetermined section)

Claims (10)

A plurality of liquid-cooled cooling units that circulate a liquid refrigerant that is in thermal contact with a plurality of arithmetic units arranged in a predetermined section and cool the arithmetic unit;
An air-cooled cooling unit that cools the air in the predetermined section that is the atmosphere of the arithmetic device and is introduced into the arithmetic device and used for cooling the arithmetic device;
A cooling control unit for controlling the cooling capacity of the liquid cooling unit and the air cooling unit;
A detection unit that detects at least a liquid cooling margin that is a margin of cooling capacity in the liquid cooling type cooling unit;
When the liquid cooling type cooling unit having the liquid cooling margin equal to or greater than the warning threshold exists, the liquid cooling type cooling unit has a larger liquid cooling margin than other liquid cooling type cooling units. A linkage processing unit that performs control to increase the amount of computation performed by the computing device;
Is provided,
The detection unit includes a frequency measurement unit that measures a drive frequency of a circulation pump that circulates the liquid refrigerant,
The apparatus cooling system according to claim 1, wherein the liquid cooling margin is obtained based on at least a driving frequency of the circulation pump. The detection unit further includes a surface temperature sensor that measures a surface temperature of a cooling target that is a temperature of a surface that is in thermal contact with the liquid refrigerant in the arithmetic device,
The liquid cooling margin is at least the cooling target surface temperature, device cooling system according to claim 1, characterized in that it is determined based on the driving frequency of the circulation pump. The liquid cooling margin, the driving frequency of at least the circulation pump, and, according to claim 1, characterized in that it is determined based on the cooling capacity of the liquid-cooling type cooling unit which is calculated on the basis of the specific heat of the liquid coolant or device cooling system according to 2. A plurality of liquid-cooled cooling units that circulate a liquid refrigerant that is in thermal contact with a plurality of arithmetic units arranged in a predetermined section and cool the arithmetic unit;
An air-cooled cooling unit that cools the air in the predetermined section that is the atmosphere of the arithmetic device and is introduced into the arithmetic device and used for cooling the arithmetic device;
A cooling control unit for controlling the cooling capacity of the liquid cooling unit and the air cooling unit;
A detection unit that detects at least a liquid cooling margin that is a margin of cooling capacity in the liquid cooling type cooling unit;
When the liquid cooling type cooling unit having the liquid cooling margin equal to or greater than the warning threshold exists, the liquid cooling type cooling unit has a larger liquid cooling margin than other liquid cooling type cooling units. A linkage processing unit that performs control to increase the amount of computation performed by the computing device;
Is provided,
The detection unit includes a refrigerant temperature sensor that measures a temperature of the liquid refrigerant or a refrigerant return temperature difference that is a temperature difference between the liquid refrigerant before and after being in thermal contact with the arithmetic device,
The apparatus cooling system according to claim 1, wherein the liquid cooling margin is obtained based on at least a temperature of the liquid refrigerant or a difference between the refrigerant return temperatures. The liquid cooling margin, the temperature of at least the liquid refrigerant, and, according to claim 4, characterized in that it is determined based on the cooling capacity of the calculated on the basis of the specific heat of the liquid coolant the liquid-cooled-type cooling unit Equipment cooling system. When the amount of calculation performed by the plurality of calculation devices increases, the linkage processing unit allocates the increased calculation amount to the calculation device cooled by the liquid cooling type cooling unit having a large liquid cooling margin. The apparatus cooling system according to any one of claims 1 to 5, wherein the apparatus cooling system is provided. The linkage processing unit is configured such that the liquid cooling of the liquid cooling type cooling unit according to the arithmetic unit is cooled by the liquid cooling type cooling unit having a large liquid cooling margin after the increased amount of calculation is distributed. Estimate the margin,
When the estimated margin, which is the estimated liquid cooling margin, is equal to or greater than the warning threshold, the amount of calculation for the increased amount is added to the arithmetic unit cooled by the liquid cooling type cooling unit having the large liquid cooling margin. 7. The apparatus cooling system according to claim 6, wherein distribution is performed. When the liquid cooling margin is less than the warning threshold value or the estimated liquid cooling margin is less than the warning threshold value, the linkage processing unit is configured to provide the arithmetic unit cooled by the air cooling type cooling unit. Allocate the increased amount of computation,
The apparatus cooling system according to claim 7 , wherein control is performed to increase a cooling capacity of the air-cooling type cooling unit according to the distribution of the increased amount of calculation. The detection unit detects an alarm issued when a malfunction occurs from the liquid cooling type cooling unit,
When the alarm is detected, the linkage processing unit, from the arithmetic device cooled by the liquid cooling type cooling unit according to the alarm,
The arithmetic unit cooled by the liquid cooling type cooling unit having a large liquid cooling margin from the liquid cooling type cooling unit different from the liquid cooling type cooling unit related to the alarm, or the air cooling type cooling unit The apparatus cooling system according to any one of claims 1 to 5, wherein control is performed to distribute a calculation amount to the calculation apparatus cooled by the apparatus. The apparatus cooling system according to claim 9, further comprising a notification unit that notifies a warning when an alarm that is issued when a malfunction occurs is input from the liquid cooling type cooling unit.

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