Two-phase flow immersion liquid cooling data center cooling system

Abstract

The invention discloses a two-phase flow immersion liquid cooling data center cooling system, and relates to the technical field of liquid cooling data centers, the two-phase flow immersion liquid cooling data center cooling system comprises a data center server and a condensing device, the data center server is provided with a cooling liquid inlet and a cooling liquid outlet, and a cooling liquid return pipe is connected between the input end of the condensing device and the cooling liquid outlet; the two-phase liquid cooling method is adopted to cool the data center server, compared with a traditional monomial cooling method and other types of cooling methods, the two-phase liquid cooling method has more excellent heat exchange capacity, more heat can be taken away by phase change, meanwhile, the heat exchange effect is greatly enhanced by arranging the external heat pipe, and the heat exchange efficiency is improved. The two-phase flow system has higher heat exchange capacity, the adjustable communicating vessel is communicated with the servers, cooling liquid uniformly cools the servers, operation and maintenance are facilitated, the movable communicating vessel is communicated with the data center servers, the cooling liquid uniformly cools the data center servers, the operation and maintenance mode is optimized, and the service life of the two-phase flow system is prolonged. And a convenient and flexible operation and maintenance system is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling data centers, and in particular to a two-phase flow immersion liquid cooling data center cooling system. Background Art

[0002] The power consumption of global digital technology is a growing trend, increasing from less than 2% in 2018 to 10% in 2023, and is expected to reach 20% by 2030. With the rapid development of AI technology, the computing power and power density of chips are also rising rapidly. The power density of emerging data centers such as intelligent computing centers and supercomputing centers has increased to 5 times that of traditional data centers. Traditional thermal management systems can hardly meet the high quality and sustainable development needs of data centers. Innovation in thermal management systems will become the key to further development of the industry.

[0003] In the existing technology, air cooling can no longer meet the cooling requirements of high-density computer rooms due to the small heat capacity of air-cooled data centers. Liquid cooling technology provides a new solution for high-density data centers. At present, the liquid cooling technologies on the market are mainly single-phase immersion liquid cooling technology and cold plate liquid cooling technology. Compared with cold plate cooling, single-phase immersion liquid cooling has better cooling capacity and greatly improved cooling effect. However, there are still disadvantages such as waste of coolant consumption, uneven cooling, and large space occupation.

[0004] At present, the operation and maintenance of liquid-cooled data centers is an issue that needs to be solved urgently. It is mainly reflected in the fact that in containerized servers, when a single server fails, the entire server needs to be shut down to clear the fault before it can continue to work, which affects the working time of other servers and results in low efficiency of liquid-cooled data centers. Therefore, the present invention proposes a two-phase flow immersion liquid-cooled data center cooling system to solve the problems existing in the prior art. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to propose a two-phase flow immersion liquid cooling data center cooling system to solve the problems of existing data center liquid cooling technology, such as waste of cooling liquid, uneven cooling, large space occupation, and low efficiency of liquid cooled data centers.

[0006] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a two-phase flow immersion liquid cooling data center cooling system, including a data center server and a condensing device, wherein the data center server is respectively provided with a coolant inlet and a coolant outlet, a coolant reflux pipe is connected between the input end and the coolant outlet of the condensing device, the output end of the condensing device is connected to a coolant circulation storage device through a first circulation pipe, the output end of the coolant circulation storage device is connected to a circulation pump through a second circulation pipe, and a coolant injection pipe is connected between the output end of the circulation pump and the coolant inlet;

[0007] The data center server includes a server shell and a data center module located inside the server shell. Adjacent server shells are connected by movable connecting pieces. The movable connecting pieces are equidistantly provided with connecting openings for connecting adjacent server shells. The data center module includes a motherboard, a graphics card, a main control and a power supply. A coolant inlet and outlet channel connected to a coolant inlet and a coolant outlet is provided inside the server shell. An external heat pipe is provided on a side wall of the server shell.

[0008] A further improvement is that: the data center server is provided with several groups, the coolant inlet is fixed with a coolant input branch pipe with an electric control valve, several groups of the coolant input branch pipes are connected in parallel to the coolant injection pipe, the coolant outlet is fixed with a coolant output branch pipe, and several groups of the coolant output branch pipes are connected in parallel to the coolant return pipe.

[0009] A further improvement is that the opening and closing of the electronically controlled valve is determined by the operating status of the data center server, and different electronically controlled valve openings are matched according to the operating and load conditions of the data center server.

[0010] A further improvement is that the condensing device is used to condense the coolant gas that absorbs heat and undergoes phase change in the coolant return pipe, and after the coolant gas is condensed into liquid, the coolant liquid is injected into the coolant circulation storage device through the first circulation pipe.

[0011] A further improvement is that the coolant circulation storage device is used to store the coolant in the system, and under the drive of the circulation pump, the coolant is injected into the coolant injection pipe through the second circulation pipe.

[0012] A further improvement is that a connector handle is fixed to one side of the movable connector outside the server housing, and the movable connector is connected to each individual data center server.

[0013] A further improvement is that the coolant inlet and outlet channels are used to connect the coolant transported by the system, and each of the coolant inlet and outlet channels is a single channel that converges into a main channel and is driven to flow by the circulating pump.

[0014] A further improvement is that the external heat pipe transfers heat by circulating an evaporation-condensation process in a fully enclosed vacuum tube, and the external heat pipe is used to enhance heat exchange after the coolant takes away the heat generated by the data center server.

[0015] The beneficial effects of the present invention are as follows: the present invention adopts a two-phase liquid cooling method to cool down the data center server, which has better heat exchange capacity than the traditional single-phase and other types of cooling methods. The phase change will take away more heat. At the same time, the heat exchange effect is greatly enhanced by setting an external heat pipe, so that the two-phase flow system has a stronger heat exchange capacity. The adjustable communication vessel connects the various servers, so that the coolant cools the various servers evenly, which is convenient for operation and maintenance. The phase-changing coolant can enhance the heat exchange effect, so that the data center has a lower PUE and higher efficiency, and the waste of coolant is eliminated when the sealing is intact.

[0016] In addition, in terms of operation and maintenance, the various data center servers are connected through movable connectors so that the coolant can evenly cool the various data center servers, which optimizes the operation and maintenance methods and forms a convenient and flexible operation and maintenance system. This avoids the situation where a single data center server has problems and all data center servers have to be shut down for maintenance, breaking the conventional operation and maintenance methods and greatly improving the work efficiency of the data center. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the two-phase flow immersion liquid cooling data center cooling system of the present invention;

[0018] Figure 2 It is a schematic diagram of the appearance structure of the data center server of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the data center server of the present invention;

[0020] Figure 4 It is a side view of the external heat pipe of the present invention.

[0021] Among them: 1. Data center server; 2. Condensation equipment; 3. Coolant inlet; 4. Coolant outlet; 5. Coolant reflux pipe; 6. First circulation pipe; 7. Coolant circulation storage equipment; 8. Second circulation pipe; 9. Circulation pump; 10. Coolant injection pipe; 11. Electric control valve; 12. Coolant input branch pipe; 13. Coolant output branch pipe; 101. Server shell; 102. Data center module; 103. Removable connecting vessel; 104. Connecting port; 105. Coolant inlet and outlet channels; 106. External heat pipe; 1021. Motherboard; 1022. Graphics card; 1023. Main control; 1024. Power supply. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The global power consumption of digital technology is a growing trend. With the development of technology and the advancement of digital transformation, this trend is expected to continue to rise, but its impact on the environment can be reduced through measures such as improving energy efficiency, using renewable energy and green design. The impact of data center cooling on the global power consumption of digital technology is significant. Data center cooling systems usually account for 30% to 50% of the total energy consumption of data centers. As the number and scale of data centers grow, the energy consumption of cooling systems also increases, which has an important impact on global electricity demand;

[0024] Data center cooling technology is a key link in ensuring the normal operation of equipment inside the data center, because excessively high temperatures will affect equipment performance and even cause failures. Choosing the right cooling technology requires considering factors such as the size of the data center, geographical location, climate conditions, and budget. For example, liquid cooling systems are more suitable for large data centers and high-performance computing environments. However, most existing data center liquid cooling technologies waste cooling liquid and lead to low efficiency of liquid-cooled data centers.

[0025] In view of the problems existing in the above-mentioned prior art, according to Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present embodiment provides a two-phase flow immersion liquid cooling data center cooling system, including a data center server 1 and a condensing device 2 for providing a condensation function for vaporized coolant, the data center server 1 is respectively provided with a coolant inlet 3 for coolant injection and a coolant outlet 4 for coolant discharge, a coolant return pipe 5 is fixedly connected to the input end water inlet of the condensing device 2, the end of the coolant return pipe 5 away from the condensing device 2 is fixedly connected to the coolant outlet 4 on the data center server 1, a first circulation pipe 6 is fixedly connected to the output end water outlet of the condensing device 2, the end of the first circulation pipe 6 away from the condensing device 2 is connected to a coolant circulation storage device 7 for storing coolant, a second circulation pipe 8 is connected to the output end water outlet of the coolant circulation storage device 7, the end of the second circulation pipe 8 away from the coolant circulation storage device 7 is provided with a circulation pump 9 for extracting the coolant in the coolant circulation storage device 7, a coolant injection pipe 10 is fixedly connected to the output end water outlet of the circulation pump 9, and the end of the coolant injection pipe 10 away from the circulation pump 9 is connected to the coolant inlet 3;

[0026] The data center server 1 includes a server shell 101 and a data center module 102, wherein the data center module 102 is located inside the server shell 101, and the server shell 101 protects the data center module 102. Two adjacent groups of server shells 101 are connected by a movable connecting piece 103, and connecting ports 104 are equidistantly provided on the movable connecting piece 103 to connect adjacent server shells 101. The data center module 102 is composed of a motherboard 1021, a graphics card 1022, a main control 1023 and a power supply 1024. A coolant inlet and outlet channel 105 is provided inside the server shell 101, and the coolant inlet 3 and the coolant outlet 4 are both connected to the coolant inlet and outlet channel 105. An external heat pipe 106 is provided on the side wall of the server shell 101. Each data center module 102 can be connected to each other, and the connection state can be controlled by the movable connecting piece 103, which is convenient for operation and maintenance.

[0027] The data center server 1 is provided with several groups, and a coolant input branch pipe 12 with an electric control valve 11 is fixed on the coolant inlet 3, and several groups of coolant input branch pipes 12 are connected in parallel to the coolant injection pipe 10, so that the coolant injection pipe 10 injects the coolant into each data center server 1 respectively, and a coolant output branch pipe 13 is fixed on the coolant outlet 4, and several groups of coolant output branch pipes 13 are connected in parallel to the coolant return pipe 5, so that the coolant in each data center server 1 can flow back and converge into the coolant return pipe 5.

[0028] The opening and closing of the electric control valve 11 is determined by the operating status of the data center server 1. Different openings of the electric control valve 11 are matched according to the operation and load conditions of the data center server 1. The circulating pump 9 can also adjust the appropriate flow rate. The electric control valve 11 is used to control the opening and closing of each coolant input branch pipe 12 to provide conditions for the operation and maintenance of a single data center server 1. When a problem occurs in a single data center server 1, it can be closed by the electric control valve 11 to ensure that the operation and maintenance does not affect the work of other data center servers 1, and the data center server 1 that needs operation and maintenance is separated out.

[0029] The condensing device 2 is used to condense the coolant gas that absorbs heat and undergoes phase change in the coolant return pipe 5, and after the coolant gas is condensed into liquid, the coolant liquid is injected into the coolant circulation storage device 7 through the first circulation pipe 6. The coolant circulation storage device 7 is used to store the coolant in the system, and under the drive of the circulation pump 9, the coolant is injected into the coolant injection pipe 10 through the second circulation pipe 8 to enter the data center server 1 for heat exchange to complete the closed loop.

[0030] The movable connector 103 is located on one side outside the server housing 101 and is fixed with a connector handle. The movable connector 103 connects each individual data center server 1, which is conducive to the sufficient flow of cooling liquid. During operation and maintenance, the movable connector 103 around the data center server 1 that needs to be repaired is closed, and this data center server 1 is operated and maintained alone. The server housing 101 is used to ensure the sealing of the data center server 1 to prevent liquid leakage.

[0031] The coolant inlet and outlet channels 105 are used to connect the coolant transported by the system to complete the system closed loop, and each coolant inlet and outlet channel 105 is a single channel that converges into a main channel and is driven to flow by the circulation pump 9.

[0032] As a highly efficient heat transfer device, the external heat pipe 106 transfers a large amount of heat by circulating the evaporation and condensation process in a fully enclosed vacuum tube. The external heat pipe 106 is used to enhance heat exchange after the coolant takes away the heat generated by the data center server 1, so as to facilitate the phase change of the two-phase coolant and take away more heat.

[0033] In terms of control logic, the electric control valve 11 controls the flow of coolant in the coolant input branch pipe 12 to achieve cooling on demand and reduce waste. When a problem occurs in a data center server 1, the electric control valve 11 of the coolant input branch pipe 12 is controlled to close the corresponding flow channel according to the steps, and the movable connecting vessel 103 around the corresponding data center server 1 is adjusted. After the liquid is discharged, the movable connecting vessel 103 is closed to ensure normal cooling of other data center servers 1, and the corresponding server cover is opened for maintenance.

[0034] When the two-phase flow immersion liquid cooling data center cooling system is in operation, the cooling liquid in the cooling liquid circulation storage device 7 is introduced into the data center server 1 through the second circulation pipe 8, the cooling liquid injection pipe 10 and the cooling liquid inlet 3 by the circulation pump 9, and a movable connecting vessel 103 is provided between different data center servers 1, and the cooling liquid immersion data center module 102 takes away the heat generated by the operation of the data center server 1. Due to the low boiling point of the cooling liquid, part of the cooling liquid evaporates and enters the condensing device 2 through the cooling liquid return pipe 5 under the action of pressure, and after condensing into liquid, it flows back to the cooling liquid circulation storage device 7 through the first circulation pipe 6, and the above steps are repeated. The cooling liquid enters the data center server 1 to take away the heat again, completing the entire liquid cooling cycle;

[0035] The multiple external heat pipes 106 arranged on the back panel of one side of the data center server 1 can enhance the heat exchange, so that part of the coolant vapor enters the external heat pipe 106, condenses and refluxes into liquid in the condensation section, promotes system heat exchange, and can take away more heat. The movable connecting tubes 103 arranged between each data center server 1 are also for more extensive circulation of the coolant and uniform cooling, and the movable connecting tubes 103 are set to be adjustable, which is convenient for the operation and maintenance of a single data center server 1 without affecting the normal operation of other data center servers 1.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A two-phase flow immersion liquid cooling data center cooling system, comprising a data center server (1) and a condensing device (2), characterized in that: The data center server (1) is provided with a cooling liquid inlet (3) and a cooling liquid outlet (4), respectively; a cooling liquid return pipe (5) is connected between the input end of the condensing device (2) and the cooling liquid outlet (4); the output end of the condensing device (2) is connected to a cooling liquid circulation storage device (7) via a first circulation pipe (6); the output end of the cooling liquid circulation storage device (7) is connected to a circulation pump (9) via a second circulation pipe (8); and a cooling liquid injection pipe (10) is connected between the output end of the circulation pump (9) and the cooling liquid inlet (3); The data center server (1) comprises a server housing (101) and a data center module (102) located inside the server housing (101); adjacent server housings (101) are connected via a movable connecting piece (103); the movable connecting piece (103) is provided with connecting openings (104) for connecting adjacent server housings (101) at equal intervals; the data center module (102) comprises a mainboard (1021), a graphics card (1022), a main control (1023) and a power supply (1024); a cooling liquid inlet and outlet channel (105) communicating with a cooling liquid inlet (3) and a cooling liquid outlet (4) is provided inside the server housing (101); and an external heat pipe (106) is provided on a side wall of the server housing (101).

2. A two-phase flow immersion liquid cooling data center cooling system according to claim 1, characterized in that: The data center server (1) is provided with a plurality of groups, a cooling liquid input branch pipe (12) with an electric control valve (11) is fixed on the cooling liquid inlet (3), and a plurality of groups of the cooling liquid input branch pipes (12) are connected in parallel to the cooling liquid injection pipe (10), and a cooling liquid output branch pipe (13) is fixed on the cooling liquid outlet (4), and a plurality of groups of the cooling liquid output branch pipes (13) are connected in parallel to the cooling liquid return pipe (5).

3. A two-phase flow immersion liquid cooling data center cooling system according to claim 2, characterized in that: The opening and closing of the electric control valve (11) is determined by the operating state of the data center server (1), and different opening degrees of the electric control valve (11) are matched according to the operating and load conditions of the data center server (1).

4. The two-phase flow immersion liquid cooling data center cooling system according to claim 1, characterized in that: The condensing device (2) is used to condense the coolant gas that absorbs heat and undergoes phase change in the coolant return pipe (5), and after the coolant gas is condensed into liquid, the coolant liquid is injected into the coolant circulation storage device (7) through the first circulation pipe (6).

5. The two-phase flow immersion liquid cooling data center cooling system according to claim 1, characterized in that: The cooling liquid circulation storage device (7) is used to store the cooling liquid in the system and, driven by the circulation pump (9), injects the cooling liquid into the cooling liquid injection pipe (10) through the second circulation pipe (8).

6. The two-phase flow immersion liquid cooling data center cooling system according to claim 1, characterized in that: A connector handle is fixed to one side of the movable connector (103) located outside the server housing (101), and the movable connector (103) is connected to each individual data center server (1).

7. The two-phase flow immersion liquid cooling data center cooling system according to claim 1, characterized in that: The coolant inlet and outlet channels (105) are used to connect the coolant transported by the system, and each of the coolant inlet and outlet channels (105) is a single channel that converges into a main channel and is driven to flow by the circulation pump (9).

8. The two-phase flow immersion liquid cooling data center cooling system according to claim 1, characterized in that: The external heat pipe (106) transfers heat by circulating an evaporation and condensation process in a fully enclosed vacuum tube. The external heat pipe (106) is used to enhance heat exchange after the cooling liquid takes away the heat generated by the data center server (1).

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