Data center cooling control method and data center cooling system

Abstract

The invention discloses a data center cooling system and a data center cooling control method thereof, and belongs to the field of edge data centers. The method is applied to a data center cold supply system, the data center cold supply system comprises a cold supply pipeline, cold source equipment and a circulating water pump, a cooling medium circularly flows through the cold supply pipeline, the cold source equipment and the circulating water pump are arranged on the cold supply pipeline, and the cold supply pipeline passes through a server of a data center; the data center cooling control method comprises the steps that the current temperature value T0 of a cooling medium in a cooling pipeline is obtained; when the current temperature value T0 is not larger than the first temperature value T1, the working frequency fa of the circulating water pump is controlled to be the lowest working frequency fa0 for operation; and according to the corresponding relation between the viscosity of the cooling medium and the temperature, the first temperature value T1 is determined according to the temperature corresponding to the viscosity mu of the cooling medium during safe operation of the circulating water pump. Operation pressure of the circulating water pump can be reduced, and the service life of the circulating water pump is prolonged.

Description

Technical Field

[0001] The present application relates to the field of data centers, and in particular to a data center cooling control method and a data center cooling system. Background Art

[0002] As an important infrastructure supporting distributed computing and storage, edge data center systems are usually located in remote or outdoor areas and often face harsh climatic conditions. For example, in high-latitude areas or cold outdoor areas, the ambient temperature may be below zero for a long time.

[0003] In the process of realizing the invention, the inventors found that there are at least the following technical problems in the prior art:

[0004] When the edge data center system is running in a harsh environment during the startup phase, a circulating water pump will be used to allow the cooling medium to flow through the edge data center system for heat exchange. However, the viscosity of the cooling medium increases significantly in a low-temperature environment, and the flow resistance of the cooling medium in the pipeline increases. If the circulating water pump operates too frequently, it may cause overload problems and cause damage. Summary of the invention

[0005] The present application is intended to at least improve the problem in the prior art that in a low temperature environment, the operating frequency of the circulating water pump is too high during the startup phase, which may cause overload operation damage.

[0006] In a first aspect, the present application provides a data center cooling control method, which is applied to a data center cooling system, wherein the data center cooling system includes a cooling pipeline for circulating a cooling medium and a cold source device and a circulating water pump arranged on the cooling pipeline, wherein the cooling pipeline passes through a server in the data center; the data center cooling control method includes:

[0007] Get the current temperature value T0 of the cooling medium in the cooling pipeline;

[0008] When the current temperature value T0 is not greater than the first temperature value T1, the operating frequency f of the circulating water pump is controlled a is the minimum operating frequency f a0 run;

[0009] According to the corresponding relationship between the viscosity and temperature of the cooling medium, the first temperature value T1 is determined by the temperature corresponding to the viscosity μ of the cooling medium when the circulating water pump is operating safely.

[0010] According to one embodiment of the present application, when the current temperature value T0 is greater than the first temperature value T1, the operating frequency f of the circulating water pump is controlled according to the PID algorithm. a .

[0011] According to one embodiment of the present application, when the current temperature value T0 is greater than the first temperature value T1, the operating frequency f of the circulating water pump is a The control quantity is calculated using the following formula:

[0012]

[0013] Where: u(k) represents the output control quantity, which is used to set the operating frequency f a ; e(k) represents the difference between T1 and T0; K P Coefficient of proportionality; K I Indicates the coefficient of integration; K D represents the coefficient of differentiation; ∑e(i) represents the accumulation of errors; e(k)-e(k-1) represents the current error minus the last error.

[0014] According to one embodiment of the present application, the cold source device is provided with a cold source fan for exchanging heat for the cold source device:

[0015] When the current temperature value T0 is not greater than the first temperature value T1, the cold source fan is not started;

[0016] When the current temperature value T0 is not greater than the second temperature value T2, the operating frequency f of the cold source fan is controlled b is the minimum operating frequency f b0 run;

[0017] The second temperature value T2 is lower than the target temperature value T3 by a preset temperature difference value X, and the target temperature value T3 is the temperature of the cooling medium when the server operates normally.

[0018] According to an embodiment of the present application, the preset temperature difference X is 15°C-25°C.

[0019] According to one embodiment of the present application, when the current temperature value T0 is greater than the second temperature value T2, the operating frequency f of the cold source fan is controlled according to the PID algorithm. b .

[0020] According to one embodiment of the present application, when the current temperature value T0 is greater than the second temperature value T2, the operating frequency f of the cold source fan b The control quantity is calculated using the following formula:

[0021]

[0022] Where: u(k) represents the output control quantity, which is used to set the operating frequency f b ; e(k) represents the difference between T2 and the current temperature value T0; K PCoefficient of proportionality; K I Indicates the coefficient of integration; K D represents the coefficient of differentiation; ∑e(i) represents the accumulation of errors; e(k)-e(k-1) represents the current error minus the last error.

[0023] According to one embodiment of the present application, it also includes:

[0024] Get the temperature rise rate of the current temperature value T0 at different times

[0025] The temperature value corresponding to the previous moment is less than the temperature value corresponding to the next moment, and the temperature rise rate When the temperature rise rate is greater than the target, the operating frequency f of the cooling fan is increased. b ;

[0026] When the temperature value corresponding to the previous moment is greater than the temperature value corresponding to the next moment, and the current temperature value T0 is not greater than the first temperature value T1, the cold source fan is controlled to stop.

[0027] According to one embodiment of the present application, the data center cooling system is provided with a bypass valve on a circulation pipeline section flowing through the server;

[0028] When the current temperature value T0 is not greater than the first temperature value T1, the bypass valve is controlled to open.

[0029] In the second aspect, the present application also proposes an edge data center system, including: a cooling pipeline, a circulating water pump, a cold source device and a bypass valve; the cooling pipeline is used for circulating cooling medium, the cold source device and the circulating water pump are arranged on the cooling pipeline, the cooling pipeline passes through the server of the data center, and the bypass valve is connected to the circulating pipeline section passing through the server; the cold source device is provided with a cold source fan for heat exchange for the cold source device:

[0030] The data center cooling system also includes a temperature sensor and a controller, the controller signal is connected to the temperature sensor, the circulating water pump and the cold source fan, and executes the data center cooling control method according to any of the above embodiments; the temperature sensor is used to collect the temperature value of the cooling medium entering the server to obtain the current temperature value T0.

[0031] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0032] When the temperature is too low, such as below zero, the cooling medium will not freeze, but the viscosity is very high. If the circulating water pump runs at a high frequency, it will cause excessive workload and it is easy to be damaged. At this time, the minimum operating frequency fa0 is used as the minimum frequency of the circulating water pump, which can reduce the operating pressure of the circulating water pump and extend its service life.

[0033] Furthermore, when the server is initially started or running at low load, the heat generated is low, and the cooling medium needs time to absorb the heat. The cold source fan is not started to reduce heat loss. The cooling medium temperature is allowed to rise quickly to exceed the first temperature value T1, so as to reduce the time from startup to stable operation of the cooling system and reduce the time for the computing power server to find the best solution.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 is a structural schematic diagram of a data center cooling system provided in the first embodiment of the present application;

[0037] Figure 2 is a structural schematic diagram of a data center cooling system provided in a second embodiment of the present application;

[0038] Figure 3 is a flow chart of a data center cooling control method provided in the third embodiment of the present application;

[0039] Figure 4 is a temperature rise rate variation diagram of the temperature value at different times of the data center cooling control method provided by the fourth embodiment of the present application;

[0040] Figure 5 This is a temperature rise rate variation diagram of the temperature values ​​of the data center cooling control method of the data center cooling system provided in the fifth embodiment of the present application at different times.

[0041] Reference numerals:

[0042] 10. Server; 20. Circulating water pump; 30. Cold source equipment; 31. Cold source fan; 40. Bypass valve; 51. First pipeline; 52. Second pipeline; 61. Temperature sensor; 62. Controller. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0044] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0045] The existing edge data center system has a relatively harsh usage scenario and application environment, usually involving extreme climate conditions, such as cold outdoor areas or high latitudes. Generally speaking, the edge data center system needs to meet the requirement of operating at an ambient temperature of -40°C. The present application provides a data center cooling control method, which is used to improve the problem in the prior art that the operating frequency of the circulating water pump is too high in a low temperature environment, which may cause overload operation damage.

[0046] The data center cooling system and the data center cooling control method of the data center cooling system provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0047] like Figure 1 As shown, the cooling system of the data center includes a circulation pipeline for conveying cooling medium to the server 10 of the data center, and a circulation water pump 20 and a cold source device 30 are arranged on the circulation pipeline. The cooling medium is conveyed from the cold source device 30 to the server 10 along the circulation pipeline to take away the heat generated in the server 10, and the circulation water pump 20 is arranged on the circulation pipeline to provide power for the cooling medium. The cold source device 30 is provided with a cold source fan 31, and the cold source fan 31 dissipates heat for the cold source device 30 by accelerating the air flow.

[0048] like Figure 2 As shown, the data center cooling system also includes a temperature sensor 61 and a controller 62 , wherein the temperature sensor 61 is used to detect the temperature of the cooling medium in the circulation pipeline, and the circulation water pump 20 , the cold source fan 31 and the temperature sensor 61 are all signal-connected and controlled by the controller 62 .

[0049] In actual implementation, the server 10 has a liquid inlet and a liquid outlet, and a circulation pipeline between the liquid inlet of the server 10 and the liquid outlet of the server 10 is arranged around the core components of the server 10, and is used to exchange heat with the core components of the server 10 through the flowing cooling medium in the circulation pipeline, thereby taking away heat to cool the server 10.

[0050] In actual implementation, the cooling medium may be an ethylene glycol solution or a propylene glycol solution.

[0051] In actual implementation, the temperature sensor 61 may be disposed at the liquid inlet of the server 10 to detect the temperature of the cooling medium delivered to the server 10. The core heat generating components of the server 10 include but are not limited to a central processing unit (CPU), a graphics processing unit (GPU), a memory module and a power supply unit (PSU).

[0052] The liquid outlet of the server 10 is connected to a first pipe 51 , and the first pipe 51 is connected to the liquid inlet of the circulating water pump 20 and the cold source device 30 in sequence.

[0053] The liquid outlet of the cold source device 30 is connected to a second pipe 52 , and the second pipe 52 is connected to the liquid inlet of the server 10 .

[0054] The cold source fan 31 is disposed in the cold source device 30 . An air outlet is provided at the top of the cold source device 30 to dissipate heat from the cooling medium flowing through the cold source device 30 .

[0055] The controller 62 is signal-connected to the temperature sensor 61 , and controls the operating frequency of the circulating water pump 20 and the start-up state of the cold source fan 31 .

[0056] In a specific implementation, the heat generated by the server 10, after heat exchange with the cooling medium, flows from the liquid outlet of the server 10 through the first pipe 51 through the circulating water pump 20, and the circulating water pump 20 provides power for the cooling medium, and transports the cooling medium to the cold source device 30 for cooling; during the operation of the cold source device 30, the external air passes through the cold source device 30, and after heat exchange with the cooling medium in the cold source device 30, the cold source fan 31 discharges the heat-exchanged air from the air outlet, thereby achieving the purpose of heat exchange. At the same time, the cooling medium finally flows into the liquid inlet of the server 10 through the second pipe 52, and circulates back and forth.

[0057] like Figure 1 As shown, in some embodiments, the data center cooling system further includes a bypass valve 40 .

[0058] A first pipe 51 is provided between the liquid outlet of the server 10 and the liquid inlet of the circulating water pump 20, and a second pipe 52 is provided between the liquid outlet of the cold source device 30 and the liquid inlet of the server 10; the bypass valve 40 is provided between the first pipe 51 and the second pipe 52. That is, the bypass valve 40 is connected to the circulating pipeline section of the circulating pipeline that flows through the server 10 through the bypass pipeline, and when the bypass valve 40 is closed, the cooling medium directly enters the circulating pipeline section in the server 10, and when the bypass valve 40 is opened, the cooling medium simultaneously enters the circulating pipeline section in the server 10 and enters the bypass pipeline where the bypass valve 40 is located.

[0059] In this embodiment, during the startup phase of the cooling system, due to the low temperature of the cooling medium, its high viscosity and poor fluidity, if the cooling medium flows entirely through the cold source device 30 and the server 10, it will cause a high flow resistance; the opening of the bypass valve 40 of the present application provides a low-resistance bypass line for the cooling medium, which can reduce the total pressure loss of the system and reduce the operating pressure of the circulating water pump 20.

[0060] The data center cooling control method of the data center cooling system of the present application can be applied to a terminal, and can be specifically executed by hardware or software in the terminal.

[0061] The terminal includes, but is not limited to, a portable communication device such as a mobile phone or tablet computer with a touch-sensitive surface (e.g., a touch screen display and / or a touch pad). It should also be understood that in some embodiments, the terminal may not be a portable communication device, but a desktop computer with a touch-sensitive surface (e.g., a touch screen display and / or a touch pad).

[0062] In the following various embodiments, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, a mouse and a joystick.

[0063] The data center cooling control method of the data center cooling system provided in the embodiment of the present application can be an electronic device or a functional module or functional entity in the electronic device that can implement the data center cooling control method. The electronic devices mentioned in the embodiment of the present application include but are not limited to mobile phones, tablet computers, computers, cameras and wearable devices. The data center cooling control method provided in the embodiment of the present application is described below using the electronic device as an example of the execution subject.

[0064] like Figure 3 As shown, the data center cooling control method includes: step 110 and step 120.

[0065] Step 110: Obtain the current temperature value T0 of the cooling medium in the cooling pipeline.

[0066] In this step, the temperature of the liquid inlet or the liquid outlet of the server 10 may be detected to obtain the current temperature value T0 of the cooling medium.

[0067] This step does not require the temperature detection method. For example, an infrared temperature sensor can be installed to measure the current temperature value T0 of the cooling medium at the liquid inlet of the server 10 through non-contact temperature measurement; a thermocouple can also be installed to measure the current temperature value T0 of the cooling medium at the liquid inlet of the server through contact temperature measurement.

[0068] Step 120: When the current temperature value T0 is not greater than the first temperature value T1, control the operating frequency f of the circulating water pump. a is the minimum operating frequency f a0 run.

[0069] According to the corresponding relationship between the viscosity and temperature of the cooling medium, the first temperature value T1 is determined by the temperature corresponding to the viscosity μ of the cooling medium when the circulating water pump 20 is operating safely.

[0070] This step determines the target viscosity of the cooling medium, which is the viscosity at which the circulating water pump 20 can operate safely. At the same time, according to the medium viscosity-temperature physical property table, the corresponding values ​​of viscosity-temperature are inserted to fit the input viscosity-temperature equation curve to find the temperature value corresponding to the target viscosity.

[0071] For example, the viscosity values ​​of the cooling medium, such as a 50% ethylene glycol solution, at different temperatures are obtained through experiments or by referring to a physical property table.

[0072] For example: temperature = -40°C, viscosity = 200mPa·s; temperature = -20°C, viscosity = 100mPa·s; temperature = 0°C, viscosity = 30mPa·s; temperature = 20°C, viscosity = 10mPa·s.

[0073] Insert the corresponding values ​​of viscosity-temperature to fit the input viscosity-temperature equation curve. Specifically, a variety of fitting methods (such as exponential fitting, polynomial fitting, etc.) can be used. This application exemplarily shows a fitting model:

[0074] μ(T)=ae bT +c;

[0075] Where: μ(T): viscosity of cooling medium;

[0076] e is the base of natural logarithms;

[0077] T: temperature; a, b, c: parameters determined by fitting.

[0078] According to the technical specifications of the circulating water pump 20, a safety viscosity is set as the target viscosity at which the circulating water pump 20 can operate safely; at the same time, the target viscosity is brought into the fitting model to find the first temperature value T1 corresponding to the target viscosity; when the temperature value is not greater than the first temperature value T1, the circulating water pump 20 is controlled to operate at the lowest operating frequency fa0, and the cold source fan 31 is not started.

[0079] It should be noted that when the temperature is too low, the viscosity of the cooling medium (such as ethylene glycol solution) is relatively high, resulting in large flow resistance in the pipeline. If the circulating water pump 20 is operated at a high frequency, it will result in an excessively high workload and may be easily damaged.

[0080] In this step, the operating frequency f of the circulating water pump 20 is controlled. a is the minimum operating frequency f a0 Operation can reduce the operating pressure of the circulating water pump 20 and extend its service life.

[0081] In the above-mentioned embodiment of the present application, when the temperature is too low, such as at sub-zero temperature, the cooling medium will not freeze, but the viscosity is very high. If the circulating water pump 20 is operated at a high frequency, it will cause excessive workload and it is easy to be damaged. At this time, the minimum operating frequency fa0 is used as the minimum frequency of the circulating water pump 20, which can reduce the operating pressure of the circulating water pump 20 and extend its service life.

[0082] In some embodiments, after step 120 , the data center cooling control method further includes: step 130 .

[0083] Step 130: When the current temperature value T0 is greater than the first temperature value T1, the operating frequency f of the circulating water pump is controlled according to the PID algorithm. a .

[0084] In this step, when the temperature value exceeds the first temperature value T1, it indicates that the viscosity of the cooling medium has been reduced to a reasonable range. At this time, increasing the frequency of the circulating water pump 20 can increase the flow rate of the cooling medium and ensure that the cooling medium circulates quickly in the system.

[0085] Exemplarily, in step 130, when the current temperature value T0 is greater than the first temperature value T1, the operating frequency f of the circulating water pump a The control quantity is calculated using the following formula:

[0086]

[0087] Where: u(k) represents the output control quantity, which is used to set the operating frequency f a ;

[0088] e(k) represents the difference between the first temperature value T1 and the current temperature value T0; KP The coefficient representing the proportion;

[0089] K I represents the coefficient of integration;

[0090] K D represents the coefficient of differentiation;

[0091] ∑e(i), represents the accumulation of errors;

[0092] e(k)-e(k-1) means current error minus last error.

[0093] In some embodiments, the cold source device 30 is provided with a cold source fan 31 for exchanging heat for the cold source device 30 .

[0094] After step 120 , the data center cooling control method further includes: step 141 and step 142 .

[0095] Step 141: When the current temperature value T0 is not greater than the first temperature value T1, the cold source fan 31 is not started.

[0096] In this step, when the server 10 is initially started or running at a low load, the heat generated is relatively low, and the cooling medium needs time to absorb the heat. The cold source fan 31 is not started to reduce heat loss. The cooling medium temperature is allowed to quickly rise to a temperature exceeding the first temperature value T1, so as to reduce the time from startup to stable operation of the cooling system and reduce the time for the computing power server to find the best solution.

[0097] Step 142: When the current temperature value T0 is not greater than the second temperature value T2, control the operating frequency f of the cold source fan 31. b is the minimum operating frequency f b0 run.

[0098] The second temperature value T2 is lower than the target temperature value T3 by a preset temperature difference X. The target temperature value T3 is the temperature of the cooling medium when the server is operating normally. When the cooling medium temperature reaches or exceeds this value, the system needs to increase the heat dissipation.

[0099] In actual implementation, the preset temperature difference X is 15°C-25°C, and the preset temperature difference X is preferably 20°C.

[0100] In some embodiments, after step 142 , the data center cooling control method further includes: step 143 .

[0101] Step 143: When the current temperature value T0 is greater than the second temperature value T2, the operating frequency f of the cold source fan is controlled according to the PID algorithm. b .

[0102] In this embodiment, when the cooling medium temperature exceeds the second temperature value T2, the server 10 generates more heat and the system may be in a high load state. By controlling the operating frequency of the cold source fan 31 by PID, the heat dissipation can be flexibly adjusted according to the actual temperature situation to prevent overheating.

[0103] Exemplarily, in step 143, when the current temperature value T0 is greater than the second temperature value T2, the operating frequency f of the cold source fan b The control quantity is calculated using the following formula:

[0104]

[0105] Where: u(k) represents the output control quantity, which is used to set the operating frequency f b ;

[0106] e(k) represents the difference between the second temperature value T2 and the current temperature value T0;

[0107] K P The coefficient representing the proportion;

[0108] K I represents the coefficient of integration;

[0109] K D represents the coefficient of differentiation;

[0110] ∑e(i), represents the accumulation of errors;

[0111] e(k)-e(k-1) means current error minus last error.

[0112] It should be noted that the second temperature value T2 = the third temperature value T3-20°C, and when the current temperature value T0 exceeds the second temperature value T2, the operating frequency of the cold source fan 31 is controlled by the PID control algorithm, and two possible situations may occur:

[0113] like Figure 4 As shown, situation 1: the current temperature value T0 rises, but begins to drop before exceeding the third temperature value T3.

[0114] like Figure 5 As shown, situation 2: the current temperature value T0 rises and exceeds the third temperature value T3, which may cause the cooling medium temperature to be too high and cause shutdown, or cause the system to stabilize for a long time.

[0115] For the above two situations, in some embodiments, after step 143 , the data center cooling control method further includes: step 151 , step 152 and step 153 .

[0116] Step 151: Obtain the temperature rise rate of the current temperature value T0 at different times

[0117] In this step, the current temperature value T0 is measured in real time by the temperature sensor 61 in the cooling medium pipeline. The temperature sensor 61 can capture the temperature change of the liquid inlet of the server 10 or the liquid outlet of the server 10 .

[0118] The temperature rise rate can be calculated by the following formula:

[0119]

[0120] Wherein, T0(t2): cooling medium temperature at time t2;

[0121] T0(t1): cooling medium temperature at time t1;

[0122] t2-t1: the interval between time t2 and time t2.

[0123] Step 152: The temperature value corresponding to the previous moment is less than the temperature value corresponding to the next moment, and the temperature rise rate When the temperature rise rate is greater than the target, the operating frequency f of the cooling fan is increased. b ;

[0124] In this step, the previous moment may be moment t1, and the next moment may be moment t2. When the temperature T0 is relatively large, the frequency of the cold source fan 31 is increased in advance to accelerate the heat dissipation of the cooling medium, which can prevent the current temperature value T0 from rapidly approaching or even exceeding the third temperature value T3.

[0125] Step 153: When the temperature value corresponding to the previous moment is greater than the temperature value corresponding to the next moment, and the current temperature value T0 is not greater than the first temperature value T1, control the cold source fan to stop.

[0126] In this step, the previous moment may be moment t1, and the next moment may be moment t2. When the temperature starts to drop, and the current temperature value T0≤the first temperature value T1, the server generates low heat, and the cooling medium needs time to absorb heat. Shutting down the cold source fan 31 can reduce heat loss, allowing the cooling medium temperature to quickly rise to exceed the first temperature value T1, thereby shortening the time for the cooling medium temperature to stabilize.

[0127] In some embodiments, the data center cooling system is provided with a bypass valve on the circulation pipeline section passing through the server.

[0128] After step 120 , the data center cooling control method further includes: step 160 .

[0129] Step 160: When the current temperature value T0 is not greater than the first temperature value T1, control the bypass valve 40 to open.

[0130] In this embodiment, Figure 1 As shown, a first pipe 51 is provided between the liquid outlet of the server 10 and the liquid inlet of the circulating water pump 20 , a second pipe 52 is provided between the liquid outlet of the cold source device 30 and the liquid inlet of the server 10 , and a bypass valve 40 is provided between the first pipe 51 and the second pipe 52 .

[0131] During the startup phase of the cooling system, since the temperature of the cooling medium is relatively low, its viscosity is relatively high, and its fluidity is poor, if the cooling medium flows entirely through the cold source device 30 and the server 10, it will cause relatively high flow resistance. The opening of the bypass valve 40 of the present application provides a low-resistance circulation channel for the cooling medium, which can reduce the total pressure loss of the system and reduce the operating pressure of the circulating water pump 20.

[0132] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0133] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage cooling medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of each embodiment of the present application.

[0134] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0135] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0136] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A data center cooling control method, applied to a data center cooling system, wherein the data center cooling system comprises a cooling pipeline for circulating a cooling medium, and a cold source device and a circulating water pump arranged on the cooling pipeline, wherein the cooling pipeline passes through a server in the data center; characterized in that: The data center cooling control method comprises: Get the current temperature value T0 of the cooling medium in the cooling pipeline; When the current temperature value T0 is not greater than the first temperature value T1, the operating frequency f of the circulating water pump is controlled a is the minimum operating frequency f a0 run; According to the corresponding relationship between the viscosity and temperature of the cooling medium, the first temperature value T1 is determined by the temperature corresponding to the viscosity μ of the cooling medium when the circulating water pump is operating safely.

2. The data center cooling control method according to claim 1, characterized in that: When the current temperature value T0 is greater than the first temperature value T1, the operating frequency f of the circulating water pump is controlled according to the PID algorithm. a .

3. The data center cooling control method according to claim 2, characterized in that: When the current temperature value T0 is greater than the first temperature value T1, the operating frequency f of the circulating water pump a The control quantity is calculated using the following formula: Where: u(k) represents the output control quantity, which is used to set the operating frequency f a ; e(k) represents the difference between the first temperature value T1 and the current temperature value T0; K P Coefficient of proportionality; K I Indicates the coefficient of integration; K D represents the coefficient of differentiation; ∑e(i) represents the accumulation of errors; e(k)-e(k-1) represents the current error minus the last error.

4. The data center cooling control method according to claim 3, characterized in that: The cold source device is provided with a cold source fan for heat exchange for the cold source device: When the current temperature value T0 is not greater than the first temperature value T1, the cold source fan is not started; When the current temperature value T0 is not greater than the second temperature value T2, the operating frequency f of the cold source fan is controlled b is the minimum operating frequency f b0 run; The second temperature value T2 is lower than the target temperature value T3 by a preset temperature difference X, and the target temperature value T3 is the temperature of the cooling medium when the server is operating normally.

5. The data center cooling control method according to claim 4, characterized in that: The preset temperature difference X is 15°C-25°C.

6. The data center cooling control method according to claim 4, characterized in that: When the current temperature value T0 is greater than the second temperature value T2, the operating frequency f of the cold source fan is controlled according to the PID algorithm. b .

7. The data center cooling control method according to claim 5, characterized in that: When the current temperature value T0 is greater than the second temperature value T2, the operating frequency f of the cold source fan b The control quantity is calculated using the following formula: Where: u(k) represents the output control quantity, which is used to set the operating frequency f b ; e(k) represents the difference between the second temperature value T2 and the current temperature value T0; K P Coefficient of proportionality; K I Indicates the coefficient of integration; K D represents the coefficient of differentiation; ∑e(i) represents the accumulation of errors; e(k)-e(k-1) represents the current error minus the last error.

8. The data center cooling control method according to claim 4, characterized in that: Also includes: Get the temperature rise rate of the current temperature value T0 at different times The temperature value corresponding to the previous moment is less than the temperature value corresponding to the next moment, and the temperature rise rate When the temperature rise rate is greater than the target, the operating frequency f of the cooling fan is increased. b ; When the temperature value corresponding to the previous moment is greater than the temperature value corresponding to the next moment, and the current temperature value T0 is not greater than the first temperature value T1, the cold source fan is controlled to stop.

9. The data center cooling control method according to claim 1, characterized in that: The data center cooling system is provided with a bypass valve on the circulation pipeline section flowing through the server; When the current temperature value T0 is not greater than the first temperature value T1, the bypass valve is controlled to open.

10. A data center cooling system, characterized in that: include: A cooling pipeline, a circulating water pump, a cold source device and a bypass valve; the cooling pipeline is used for circulating cooling medium, the cold source device and the circulating water pump are arranged on the cooling pipeline, the cooling pipeline passes through the server of the data center, and the bypass valve is connected to the circulating pipeline section passing through the server; the cold source device is provided with a cold source fan for heat exchange for the cold source device: The data center cooling system also includes a temperature sensor and a controller, the controller signal is connected to the temperature sensor, the circulating water pump and the cold source fan, and executes the data center cooling control method according to any one of claims 1 to 9; the temperature sensor is used to collect the temperature value of the cooling medium entering the server to obtain the current temperature value T0.

Images