Immersed phase change cooling system and control method thereof

Abstract

The invention relates to the technical field of heat dissipation, particularly provides an immersed phase change cooling system and a control method thereof, and aims to solve the problems of how to improve the cooling efficiency of a power equipment cooling system and how to reduce energy consumption. In order to achieve the purpose, the immersed phase change cooling system comprises a cooling chamber, a first phase change working medium is contained in the cooling chamber, the first phase change working medium is a liquid-gas phase change working medium, and a cavity is reserved above the first phase change working medium; the condensing device comprises a cooling pipeline arranged in the cavity, a liquid storage container arranged outside the cooling chamber and connected with the cooling pipeline, and a pump device used for providing circulating power for cooling liquid in the cooling pipeline; and the cold storage module is located in the cavity and comprises a shell and a second phase change working medium arranged in the shell, and the second phase change working medium is a solid-liquid phase change working medium. The cooling efficiency of the phase change cooling system can be improved, the power consumption of the system can be saved, and the cost reduction requirement is met.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and specifically provides an immersion phase change cooling system and a control method thereof. Background Art

[0002] Power equipment is the foundation of the operation of modern society and plays an irreplaceable role in various fields. With the advent of the digital economy era, data centers, as important basic power facilities for information, communication and computing, play an increasingly important role in social and economic development.

[0003] Heat dissipation during the operation of data centers has always been a highly concerned issue in the industry. Timely discharge of heat generated during the operation of data centers is not only beneficial to the stability and safety of power grid operation, but also of great significance to the economic and efficient operation of data centers. In the early days of the industry, data center cooling technologies included room-level air conditioners, row-level air conditioners, backplane air conditioners, etc., and later gradually developed to air cooling and forced water cooling circulation. However, no matter which of the above methods is used, there are problems of low cooling efficiency and high PUE value (energy efficiency evaluation index), resulting in energy waste, which is not in line with the current development concept of energy saving and cost reduction.

[0004] Accordingly, the art needs a new technical solution to solve the above problems. Summary of the invention

[0005] The present application aims to solve the above technical problem, that is, to solve the problem of how to improve the cooling efficiency of the cooling system of the power equipment while reducing energy consumption.

[0006] In a first aspect, the present application provides an immersion phase change cooling system, comprising:

[0007] A cooling chamber, wherein a first phase-change working medium is contained therein, wherein the first phase-change working medium is a liquid-gas phase-change working medium, and a cavity is reserved above the first phase-change working medium;

[0008] A condensing device, comprising a cooling pipeline arranged in the cavity, a liquid storage container arranged outside the cooling chamber and connected to the cooling pipeline, and a pump device for providing circulation power for the coolant in the cooling pipeline;

[0009] A cold storage module is located in the cavity. The cold storage module includes a shell and a second phase change working medium arranged in the shell. The second phase change working medium is a solid-liquid phase change working medium.

[0010] In a technical solution of the above phase change cooling system, a plurality of the cold storage modules are arranged in the cavity at intervals, and a gas channel is formed between adjacent cold storage modules;

[0011] The cooling pipeline includes a first cooling pipeline arranged along the gas channel.

[0012] In a technical solution of the above-mentioned phase change cooling system, the cooling pipeline also includes a second cooling pipeline, the second cooling pipeline is arranged in the shell, and the second phase change working medium is wrapped around the outside of the second cooling pipeline.

[0013] In a technical solution of the above phase change cooling system, the first cooling pipeline and the second cooling pipeline are independent of each other, and the phase change cooling system further includes:

[0014] a multi-way control valve, which is arranged near the output end of the pump device, and the first cooling pipeline and the second cooling pipeline are both connected to the multi-way control valve;

[0015] A controller is communicatively connected with the pump device and the multi-way control valve, respectively. The controller controls the operating states of the pump device and the multi-way control valve according to the working state of the equipment to be cooled, so that when the pump device is turned on, the liquid storage container is connected with the first cooling pipeline to form a first circulation loop, and / or the liquid storage container is connected with the second cooling pipeline to form a second circulation loop.

[0016] In a technical solution of the above phase change cooling system, the outer surface of the shell is provided with a porous structure, a micro-groove structure or a wire mesh structure.

[0017] In a technical solution of the above-mentioned phase change cooling system, a fan is provided on the outer surface of the liquid storage container.

[0018] In a second aspect, the present application provides a control method for an immersion phase change cooling system, wherein the phase change cooling system is used to cool power equipment, and the phase change cooling system comprises:

[0019] A cooling chamber, wherein a first phase-change working medium is contained therein, wherein the first phase-change working medium is a liquid-gas phase-change working medium, and a cavity is reserved above the first phase-change working medium;

[0020] A condensing device, comprising a cooling pipeline arranged in the cavity, a liquid storage container arranged outside the cooling chamber and connected to the cooling pipeline, and a pump device for providing circulation power for the coolant in the cooling pipeline;

[0021] A cold storage module is located in the cavity, and comprises a shell and a second phase change medium arranged in the shell, wherein the second phase change medium is a solid-liquid phase change medium;

[0022] The control method comprises:

[0023] When the electric power equipment is running, obtaining the power consumption status of the electric power equipment;

[0024] The operating state of the pump device is adjusted according to the power consumption state.

[0025] In a technical solution of the above control method, obtaining the power usage status of the power equipment includes:

[0026] Determine the peak power consumption period and the off-peak power consumption period of the electric power equipment;

[0027] The step of adjusting the operating state of the pump device according to the power consumption state comprises:

[0028] When the power equipment enters a low power consumption period, controlling the pump device to start;

[0029] When the electric power equipment enters the peak period of electricity consumption, the pump device is controlled to be turned off.

[0030] In a technical solution of the above control method, a plurality of cold storage modules are arranged at intervals in the cavity, a gas channel is formed between adjacent cold storage modules, the cooling pipeline includes a first cooling pipeline arranged along the gas channel and a second cooling pipeline arranged in the shell; the first cooling pipeline and the second cooling pipeline are independent of each other, the phase change cooling system further includes a multi-way control valve, which is arranged near the output end of the pump device, and the first cooling pipeline and the second cooling pipeline are both connected to the multi-way control valve;

[0031] The obtaining of the power usage status of the power equipment comprises:

[0032] Determine the peak power consumption period and the off-peak power consumption period of the electric power equipment;

[0033] The step of adjusting the operating state of the pump device according to the power consumption state comprises:

[0034] When the power equipment enters a low power consumption period, controlling the pump device to start;

[0035] Controlling the working state of the multi-way control valve so that the coolant in the liquid storage container enters the first cooling pipeline and the second cooling pipeline at the same time;

[0036] After the electric power equipment has been running for a first preset time during the low-power consumption period, the working state of the multi-way control valve is controlled so that the coolant in the liquid storage container only enters the first cooling pipeline;

[0037] When the electric power equipment enters the peak period of electricity consumption, controlling the pump device to shut down;

[0038] After the electric power equipment runs for a second preset time period during the peak power consumption period, the pump device is controlled to start.

[0039] In a technical solution of the above control method, determining the peak power consumption period and the valley power consumption period of the electric power equipment includes:

[0040] The peak power consumption period and the low power consumption period of the electric equipment are determined according to the power load curve.

[0041] As mentioned above, the present application adjusts the operating state of the pump device according to the power consumption state of the power equipment to be cooled, so that when the power consumption is low, the operation of the pump device is controlled so that the coolant takes away a small amount of heat in the cooling chamber to meet the condensation demand. At the same time, the existence of the cooling pipeline in this process also stores cold for the second phase change working fluid. During peak power consumption, the pump device is controlled to be turned off, and the cold storage capacity accumulated by the second phase change working fluid during the low power consumption stage is used to achieve rapid cooling, improve cooling efficiency, and also avoid power loss due to the operation of the pump device. In this way, the phase change cooling system of the present application cooperates with the system regulation on the supply side of the power grid and the demand side of the power equipment, which not only plays a role of "peak shaving and valley filling" on the energy consumption side, improves the cooling efficiency of the phase change cooling system, and is beneficial to the stability of the power grid, but also "flexible energy use" is carried out in the phase change cooling system, which reduces electricity costs and improves the operating economy of the entire power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which:

[0043] Figure 1 is a schematic diagram of an immersion phase change cooling system according to an embodiment of the present application;

[0044] Figure 2 is a flow chart of the main steps of a control method for an immersion phase change cooling system according to an embodiment of the present application;

[0045] Figure 3 It is a detailed step flow chart of a control method of an immersion phase change cooling system according to an embodiment of the present application.

[0046] In the figures, the reference numerals refer to the following:

[0047] 1. Cooling chamber; 100. Gas channel; 11. First phase-change working fluid; 2. Condensing device; 21. Cooling pipeline; 211. First cooling pipeline; 212. Second cooling pipeline; 22. Liquid storage container; 221. Fan; 23. Pump device; 24. Multi-way control valve; 25. Multi-way valve; 3. Cold storage module; 31. Shell; 32. Second phase-change working fluid. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application and are not used to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0049] It should be noted that in the description of this application, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the ordinal numbers "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] Reference Figure 1 , is an immersion phase change cooling system according to an embodiment of the present application, which includes a cooling chamber 1, a condensing device 2 and a cold storage module 3.

[0052] The interior of the cooling chamber 1 is a closed chamber, and the cooling chamber 1 contains a first phase change medium 11. When the phase change cooling system is installed in the power equipment, the power module (i.e., the heat source) of the power equipment is located in the lower part of the cooling chamber 1, so that the first phase change medium 11 immerses the power module to be cooled, so that when the power module generates heat, it fully exchanges heat with the first phase change medium 11. The first phase change medium 11 is a liquid-gas phase change medium, which means that it is liquid at room temperature and changes to gas after absorbing heat. A cavity is reserved above the first phase change medium 11, so that after the first phase change medium 11 is heated and becomes a gaseous medium, it can rise along the cavity, and then exchange heat with the condensing device 2, and then condense into a liquid and flow back downward to the lower part of the cooling chamber 1 under the action of gravity. In this way, the cooling of the heat-generating power module is achieved through the self-circulation of the first phase change medium 11 in the cooling chamber 1.

[0053] The condensing device 2 includes a cooling pipeline 21, a liquid storage container 22 and a pump device 23. The cooling pipeline 21 is located in the above-mentioned cavity, and both ends of the cooling pipeline 21 pass through the cooling chamber 1 and are sealed and connected to the cooling chamber 1. The liquid storage container 22 is located outside the cooling chamber 1, and the liquid storage container 22 contains a coolant, which can be a liquid with a high specific heat capacity such as water. The liquid storage container 22 is connected to the cooling pipeline 21 to form a circulation loop, and the pump device 23 is connected and arranged in the circulation loop. The pump device 23 is used to provide circulation power for the coolant to flow in the above-mentioned circulation loop.

[0054] After the first phase-change medium 11 is heated and transformed into a gaseous medium, it rises and contacts the cooling pipe 21. The coolant takes away the heat in the cavity of the cooling chamber 1 during the process of flowing through the cooling pipe 21, thereby achieving heat exchange and liquefying the gaseous medium.

[0055] The cold storage module 3 is located in the cavity. The cold storage module 3 includes a shell 31 and a second phase change medium 32 arranged in the shell 31. The interior of the shell 31 is also a closed space. The second phase change medium 32 is filled in the above-mentioned sealed space. The second phase change medium 32 is a solid-liquid phase change medium. The solid-liquid phase change medium means that it is solid at room temperature and changes into liquid after absorbing heat.

[0056] It should be noted that the liquid storage container 22 is located in the external environment, and the coolant inside it is at the ambient temperature. When the first phase change working medium 11 is transformed into a gaseous working medium, the temperature in the cavity of the cooling chamber 100 is greater than the ambient temperature. Therefore, the coolant at the ambient temperature can also achieve the condensation effect on the gaseous working medium. In order to improve the heat exchange effect, in some embodiments of the present application, a fan 221 is also provided on the outer surface of the liquid storage container 22, and the fan 221 is used to accelerate the airflow to quickly release the heat absorbed during the circulation of the coolant to the external environment, thereby improving the condensation effect of the condensing device 2. Of course, it should be understood that in some other implementations, an active refrigeration device (such as a semiconductor refrigeration device, etc.) can also be provided on the outer surface of the liquid storage container 22 to reduce the temperature of the coolant to below the ambient temperature, thereby further improving the condensation effect. In actual applications, the specific method to be adopted can be comprehensively determined based on the heat dissipation requirements and economy of the power equipment to be cooled.

[0057] It should also be noted that the boiling point temperature of the first phase change working fluid 11 and the liquefaction temperature of the second phase change working fluid 32 can be determined according to actual needs. For example, in some embodiments of the present application, the first phase change working fluid 11 can be a fluorocarbon compound with a boiling point temperature of 40°C-60°C. The second phase change working fluid 32 can be a solid silicone grease material, and its liquefaction temperature is usually around 50°C. Therefore, in the process of the first phase change working fluid 11 being heated and transformed into a gaseous working fluid and rising, when the temperature in the cavity reaches the liquefaction temperature of the second phase change working fluid 32, the second phase change working fluid 32 can also exchange heat with the gaseous working fluid, and the second phase change working fluid 32 is heated and liquefied, absorbing the heat of the gaseous working fluid, and the gaseous working fluid is condensed into a liquid working fluid and refluxed, that is, the "cold storage" function of the cold storage module 3 is used to further enhance the cooling effect of the phase change cooling system.

[0058] The phase change cooling system of the present application is applied to the cooling of electric equipment. In specific applications, the heat generating power module of the electric equipment must be placed inside the cooling chamber 1, and the first phase change working fluid 11 must be ensured to immerse the power module to maximize the cooling efficiency. At the same time, the sealing of the cooling chamber 1 must be ensured. As can be seen from the above, during the operation of the electric equipment and the phase change cooling system, the first phase change working fluid 11 is heated and transformed into a gaseous working fluid, and then rises along the cavity of the cooling chamber 1. At the same time, the pump device 23 operates to cause the coolant in the liquid storage container 22 to circulate along the cooling pipeline 21, and condense the gaseous working fluid to achieve self-circulation of the first phase change working fluid 11. Similarly, when the temperature in the upper part of the cooling chamber 1 reaches the liquefaction temperature of the second phase change working fluid 32, the second phase change working fluid 32 will also condense the gaseous working fluid. However, the heat generation of power equipment is different under different power consumption conditions. When the power equipment is in a low power consumption period, the heat generation is lower. When the power equipment is in a peak power consumption period, the heat generation naturally increases. The present application relies on the second phase change medium 32 to further improve the cooling effect. Since the second phase change medium 32 has a higher cold storage density, it will absorb a large amount of latent heat when it begins to liquefy. Therefore, if the pump device 23 is always controlled to operate during the operation of the power equipment, it will cause cold "overflow" and may not significantly help the condensation process, thereby causing a waste of electric energy.

[0059] Therefore, during the operation of the power equipment, the present application adaptively adjusts the operation state of the pump device 23 based on the power consumption state of the power equipment. Specifically, when the power equipment is in the low power consumption, the pump device 23 is controlled to be turned on. At this time, the heat generation of the power equipment is low, and condensation can be performed by relying on the heat exchange between the cooling pipeline 21 and the gaseous working medium. In addition, in this process, the cooling pipeline 21 will also exchange heat with the second phase-change working medium 32, so that in the previous peak power consumption stage of the low power consumption stage, the liquefied second phase-change working medium 32 is re-solidified to form a solid working medium, that is, a "cold storage" process is performed to increase the cold storage capacity of the second phase-change working medium 32. When the power equipment is in the peak power consumption, the pump device 23 is controlled to be turned off. At this time, the heat generation of the power equipment is high, and the second phase-change working medium 32 is liquefied to absorb a large amount of heat, releasing the cold storage capacity, and quickly condensing the gaseous working medium to improve the heat dissipation efficiency of the system. At the same time, the system power consumption is reduced by stopping the operation of the pump device 23. As above, when the low power consumption stage and the peak power consumption stage are alternately performed, the above process is circulated.

[0060] As mentioned above, the present application adjusts the operating state of the pump device 23 according to the power consumption state of the power equipment to be cooled, so that when the power consumption is low, the pump device 23 is controlled to operate so that the coolant takes away a small amount of heat in the cooling chamber 1 to meet the condensation requirements. At the same time, the existence of the cooling pipeline 21 in this process also stores cold for the second phase change medium 32. During peak power consumption, the pump device 23 is controlled to be closed, and the cold storage capacity accumulated by the second phase change medium 32 during the low power consumption stage is used to achieve rapid cooling, improve cooling efficiency, and also avoid power loss due to the operation of the pump device 23. In this way, the phase change cooling system of the present application cooperates with the system regulation on the supply side of the power grid and the demand side of the power equipment, not only plays a role of "peak shaving and valley filling" on the energy consumption side, improves the cooling efficiency of the phase change cooling system, and is beneficial to the stability of the power grid, but also "flexible energy use" is carried out in the phase change cooling system, reducing electricity costs and improving the operating economy of the entire power system.

[0061] In one embodiment of the present application, the phase change cooling system further includes a controller (not shown in the figure), which can control the operating state of the pump device 23 according to the power consumption state of the power equipment to achieve automatic control.

[0062] It should be noted that, in practical applications, the phase change material used for the second phase change medium 32 can be determined according to demand. For example, the liquefaction temperature of the second phase change medium 32 can be above 50°C, so that in the low power consumption stage, only the cooling pipeline 21 exchanges heat with the gaseous medium, and the cooling pipeline 21 also solidifies the second phase change medium 32 to "store cold", so as to better reflect the above-mentioned "peak shaving and valley filling" effect. Of course, it should be understood that since the cooling pipeline 21 is also responsible for storing cold for the second phase change medium 32, the arrangement of the cooling pipeline 21 is as close to the second phase change medium 32 as possible, and at the same time increases the contact area between the cooling pipeline 21 and the second phase change medium 32. For example, the cooling pipeline 21 can be in the form of a coil, which is wrapped around the outside of the second phase change medium 32 or the shell 31, or the cooling pipeline 21 is located in the second phase change medium 32, so that the second phase change medium 32 wraps the cooling pipeline 21. This application does not limit this specific form.

[0063] Reference Figure 1 In one embodiment of the present application, the cooling pipeline 21 includes a first cooling pipeline 211 and a second cooling pipeline 212, and the first cooling pipeline 211 is located in the cavity of the cooling chamber 1. The second cooling pipeline 212 is located in the shell 31 of the cold storage module 3, and the second phase change medium 32 is wrapped on the outside of the second cooling pipeline 212. In this way, the first cooling pipeline 211 is mainly used for heat exchange with the gaseous medium during the low power consumption stage, and the second cooling pipeline 212 is mainly used for heat exchange with the second phase change medium 32 to store cold for the second phase change medium 32.

[0064] Optionally, a plurality of cold storage modules 3 are arranged at intervals in the cavity, a gas channel 100 is formed between adjacent cold storage modules 3, and the first cooling pipeline 211 is arranged along the gas channel 100. Since a shell 31 is arranged outside the second phase-change working medium 32, the contact area between the second phase-change working medium 32 and the gaseous working medium is limited, and the present application adopts the above-mentioned method to arrange a plurality of cold storage modules 3 at intervals, and the gaseous working medium can enter the gas channel 100 between adjacent cold storage modules 3, which is conducive to increasing the heat exchange area between the second phase-change working medium 32 and the gaseous working medium, and the first cooling pipeline 211 is located in a position fully exposed to the gas channel 100, which can also enhance the heat exchange efficiency between the first cooling pipeline 211 and the gaseous working medium.

[0065] In order to further increase the heat exchange efficiency between the second phase change working medium 32 and the gaseous working medium, in some embodiments, the outer surface of the shell 31 is provided with an enhanced heat exchange structure, which includes but is not limited to a porous structure, a microgroove structure or a wire mesh structure, as long as the specific surface area of ​​the shell 31 can be increased.

[0066] Reference Figure 1As an optional implementation of the present application, the first cooling pipeline 211 and the second cooling pipeline 212 are two independent pipelines connected in parallel in the entire circulation loop of the condensing device 2. A multi-way control valve 24 is provided near the output end of the pump device 23 in the circulation loop, and the first cooling pipeline 211 and the second cooling pipeline 212 are both connected to the multi-way control valve 24. The controller is also connected to the multi-way control valve 24 in communication, and the control valve can also control the operation state of the multi-way control valve 24 according to the working state of the power equipment to be cooled. For example, when the pump device 23 is turned on, the controller can control the operation state of the multi-way control valve 24, so that the liquid storage container 22 is only connected to the first cooling pipeline 211 to form a first circulation loop, or the liquid storage container 22 is only connected to the second cooling pipeline 212 to form a second circulation loop, or the liquid storage container is simultaneously connected to the first cooling pipeline 211 and the second cooling pipeline 212, at which time the first circulation loop and the second circulation loop are in parallel. Of course, when the controller controls the pump device 23 to be turned off, all circulation loops are cut off.

[0067] When the above technical solution is adopted, the phase change cooling system can be more finely controlled according to the power consumption state of the power equipment. For example, when the power equipment enters the low power consumption period, the working state of the multi-way control valve 24 is first controlled so that the coolant in the liquid storage container 22 enters the first cooling pipeline 211 and the second cooling pipeline 212 at the same time. In this process, the first cooling pipeline 211 mainly condenses the gaseous working medium, and the second cooling pipeline 212 mainly solidifies the second phase change working medium 32 for cold storage. After the power equipment runs for the first preset time during the low power consumption period, the second phase change working medium 32 may have been completely solidified, and the second cooling pipeline 212 is located in the second phase change working medium 32, and its condensation effect on the gaseous working medium is very small. In order to reduce the flow rate of the pump device 23 and thus reduce its operating power, the working state of the multi-way control valve 24 is controlled at this time so that the coolant in the liquid storage container 22 only enters the first cooling pipeline 211, thereby reducing the power consumption of the system. When the power equipment enters the peak power consumption period, the pump device 23 is controlled to be closed, and only the cold storage capacity of the second phase change working medium 32 is relied on for heat exchange. After the power equipment runs for a second preset period of time during the peak power consumption period, most of the cold storage capacity of the second phase change working medium 32 may have been released, and the remaining cold storage capacity of the second phase change working medium 32 is insufficient to meet the heat exchange demand, which may cause the temperature in the cooling chamber 1 to rise. At this time, the pump device 23 is controlled to be turned on, and at the same time, the multi-way control valve 24 is controlled to introduce coolant into the first cooling pipeline 211 and / or the second cooling pipeline 212 to perform auxiliary heat exchange.

[0068] As mentioned above, by further controlling the phase change cooling system, the cooling efficiency of the system can be guaranteed on the basis of energy saving, thereby seeking a balance between improving cooling efficiency and reducing costs and saving energy.

[0069] Reference Figure 1 In the circulation loop of the condensing device, a multi-way valve 25 is also provided near the liquid return end of the liquid storage device. In the embodiment of the present application, the multi-way valve 25 does not have a control function, and it only serves to converge multiple paths.

[0070] Although in the above-mentioned embodiments of the present application, the first cooling pipeline 211 and the second cooling pipeline 212 are arranged independently of each other for illustrative description, it does not constitute a limitation to the present application. It is only an optional method provided by the present application. In some other implementation methods, in order to simplify the system structure, the first cooling pipeline 211 and the second cooling pipeline 212 can also be arranged in series.

[0071] The phase change cooling system of the present application includes but is not limited to being applied to data centers, converter valves or other power equipment. When the phase change cooling system is applied to a data center, the corresponding power module (i.e., heat source) of the data center can be immersed in the first phase change working medium 11. The control method of the phase change cooling system applied to a data center is introduced below as an example.

[0072] Reference Figure 2 , is a flow chart of the main steps of a control method for an immersion phase change cooling system according to an embodiment of the present application, which includes:

[0073] S101: When the data center is running, the power consumption status of the data center is obtained.

[0074] In step S101, the power consumption status of the data center can be reflected by the peak power consumption period and the valley power consumption period, that is, the peak power consumption period indicates that the data center is at the peak power consumption, at this time the data center is in a high computing power operation state, the power consumption is high, and therefore the system heat generation is also high. Correspondingly, the valley power consumption period indicates that the data center is in the valley power consumption, at this time the data center is in a low computing power operation state, the power consumption is low, and therefore the system heat generation is also low.

[0075] Specifically, the data center can divide the 24 hours of a day into different time periods, each of which corresponds to different power demand and load conditions. The peak power consumption period is usually during the day, especially during the working hours of weekdays, and the low power consumption period is usually at night. Of course, the specific range of the above peak power consumption period and low power consumption period is also affected by seasonal factors, regional factors, sudden application needs, etc. Therefore, the peak power consumption period and low power consumption period can be comprehensively determined in combination with the power load curve of the data center, that is, summarized by the alternating change pattern of peaks and troughs presented by the power load curve of the data center.

[0076] S102: Adjust the operating state of the pump device according to the power consumption state.

[0077] For example, step S102 may include:

[0078] When the data center enters the off-peak period of electricity consumption, the pump device is controlled to turn on.

[0079] When the data center enters the peak power consumption period, the pump device is controlled to shut down.

[0080] Reference Figure 3 , is a detailed step flow chart of a control method for an immersion phase change cooling system according to an embodiment of the present application, and step S102 is specifically introduced. Step S102 specifically includes:

[0081] S1021: Determine whether the data center has entered a period of low electricity consumption. When the data center has entered a period of low electricity consumption, control the pump device to start.

[0082] S1022: Control the working state of the multi-way control valve so that the coolant in the liquid storage container enters the first cooling pipeline and the second cooling pipeline at the same time.

[0083] S1023: Determine whether the data center has been running for a first preset time. When the data center has been running for the first preset time, control the working state of the multi-way control valve so that the coolant in the liquid storage container only enters the first cooling pipeline.

[0084] The above-mentioned first preset duration can be specifically determined based on the total duration of the low-power consumption period, the characteristics of the data center itself, or the heat generation pattern of the data center, etc., and this application does not impose any restrictions on this.

[0085] S1024: Determine whether the data center has entered a peak power consumption period. When the data center has entered a peak power consumption period, control the pump device to shut down.

[0086] S1025: Determine whether the data center has been running for a second preset time period, and when the data center has been running for the second preset time period, control the pump device to start.

[0087] The above-mentioned second preset duration can be specifically determined based on the total duration of the peak power consumption period, the characteristics of the data center itself, or the heat generation pattern of the data center, etc., and this application does not impose any restrictions on this.

[0088] From the above, it can be seen that through the immersion phase change cooling system and its control method of the present application, the characteristics of the solid-liquid phase change working fluid "high cold storage density and large phase change latent heat" are utilized to "store cold" during the low electricity consumption period, so that the data center can be cooled more efficiently during the peak electricity consumption period, which is beneficial to improving the stability of the operation of power equipment and the entire power grid system. At the same time, combined with the difference in heat generation between the low electricity consumption period and the peak electricity consumption period of the data center, the pump device is controlled to be turned on or off in different stages, which can also save system power consumption and meet cost reduction needs.

[0089] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. An immersion phase change cooling system, characterized in that: include: A cooling chamber, wherein a first phase-change working medium is contained therein, wherein the first phase-change working medium is a liquid-gas phase-change working medium, and a cavity is reserved above the first phase-change working medium; A condensing device, comprising a cooling pipeline arranged in the cavity, a liquid storage container arranged outside the cooling chamber and connected to the cooling pipeline, and a pump device for providing circulation power for the coolant in the cooling pipeline; A cold storage module is located in the cavity. The cold storage module includes a shell and a second phase change working medium arranged in the shell. The second phase change working medium is a solid-liquid phase change working medium.

2. The phase change cooling system according to claim 1, characterized in that: A plurality of cold storage modules are arranged in the cavity at intervals, and a gas channel is formed between adjacent cold storage modules; The cooling pipeline includes a first cooling pipeline arranged along the gas channel.

3. The phase change cooling system according to claim 2, characterized in that: The cooling pipeline also includes a second cooling pipeline, the second cooling pipeline is arranged in the shell, and the second phase-change working medium is wrapped around the outside of the second cooling pipeline.

4. The phase change cooling system according to claim 3, characterized in that: The first cooling pipeline and the second cooling pipeline are independent of each other, and the phase change cooling system further includes: a multi-way control valve, which is arranged near the output end of the pump device, and the first cooling pipeline and the second cooling pipeline are both connected to the multi-way control valve; A controller is communicatively connected with the pump device and the multi-way control valve, respectively. The controller controls the operating states of the pump device and the multi-way control valve according to the working state of the equipment to be cooled, so that when the pump device is turned on, the liquid storage container is connected with the first cooling pipeline to form a first circulation loop, and / or the liquid storage container is connected with the second cooling pipeline to form a second circulation loop.

5. The phase change cooling system according to claim 1, characterized in that: The outer surface of the shell is provided with a porous structure, a micro-groove structure or a wire mesh structure.

6. The phase change cooling system according to claim 1, characterized in that: A fan is arranged on the outer surface of the liquid storage container.

7. A control method for an immersion phase change cooling system, characterized in that: The phase change cooling system is used to cool the power equipment, and the phase change cooling system comprises: A cooling chamber, wherein a first phase-change working medium is contained therein, wherein the first phase-change working medium is a liquid-gas phase-change working medium, and a cavity is reserved above the first phase-change working medium; A condensing device, comprising a cooling pipeline arranged in the cavity, a liquid storage container arranged outside the cooling chamber and connected to the cooling pipeline, and a pump device for providing circulation power for the coolant in the cooling pipeline; A cold storage module is located in the cavity, and comprises a shell and a second phase change medium arranged in the shell, wherein the second phase change medium is a solid-liquid phase change medium; The control method comprises: When the electric power equipment is running, obtaining the power consumption status of the electric power equipment; The operating state of the pump device is adjusted according to the power consumption state.

8. The control method according to claim 7, characterized in that: The obtaining of the power usage status of the power equipment comprises: Determine the peak power consumption period and the off-peak power consumption period of the electric power equipment; The step of adjusting the operating state of the pump device according to the power consumption state comprises: When the power equipment enters a low power consumption period, controlling the pump device to start; When the electric power equipment enters the peak period of electricity consumption, the pump device is controlled to be turned off.

9. The control method according to claim 7, characterized in that: The cold storage modules are arranged in plurality in the cavity, and a gas channel is formed between adjacent cold storage modules. The cooling pipeline includes a first cooling pipeline arranged along the gas channel and a second cooling pipeline arranged in the shell. The first cooling pipeline and the second cooling pipeline are independent of each other. The phase change cooling system further includes a multi-way control valve, which is arranged near the output end of the pump device. The first cooling pipeline and the second cooling pipeline are both connected to the multi-way control valve. The obtaining of the power usage status of the power equipment comprises: Determine the peak power consumption period and the off-peak power consumption period of the electric power equipment; The step of adjusting the operating state of the pump device according to the power consumption state comprises: When the power equipment enters a low power consumption period, controlling the pump device to start; Controlling the working state of the multi-way control valve so that the coolant in the liquid storage container enters the first cooling pipeline and the second cooling pipeline at the same time; After the electric power equipment has been running for a first preset time during the low-power consumption period, the working state of the multi-way control valve is controlled so that the coolant in the liquid storage container only enters the first cooling pipeline; When the electric power equipment enters the peak period of electricity consumption, controlling the pump device to shut down; After the electric power equipment runs for a second preset time period during the peak power consumption period, the pump device is controlled to start.

10. The control method according to claim 8, characterized in that: Determining the peak power consumption period and the low power consumption period of the electric equipment comprises: The peak power consumption period and the low power consumption period of the electric equipment are determined according to the power load curve.

Images