CN111465299A - Liquid cooling system combining data center immersion type and indirect contact type - Google Patents
Liquid cooling system combining data center immersion type and indirect contact type Download PDFInfo
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- CN111465299A CN111465299A CN202010510229.5A CN202010510229A CN111465299A CN 111465299 A CN111465299 A CN 111465299A CN 202010510229 A CN202010510229 A CN 202010510229A CN 111465299 A CN111465299 A CN 111465299A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20763—Liquid cooling without phase change
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Abstract
The invention provides a liquid cooling system combining immersion type and indirect contact type of a data center, which combines an immersion type liquid cooling technology and a contact type liquid cooling technology and solves the problems that the loss of a pump is large, the greening degree of the data center is reduced and the like in the traditional single-phase direct immersion type liquid cooling. The liquid cooling system comprises a liquid cooling cabinet, a cold quantity distribution unit, a water chilling unit, heat extraction equipment, a liquid storage tank, a refrigerant pump and the like. The liquid cooling cabinet comprises a liquid cooling box body, a server and a layered cold plate, wherein a single-phase refrigerant is filled in the box body, the server is immersed in the single-phase refrigerant, and the layered cold plate is non-uniformly fixed in the box body from bottom to top. The invention can avoid the driving of a pump to the high-viscosity single-phase refrigerant and the circulating flow of the single-phase refrigerant outside the box body, can completely replace a compressor to run all the year round, really realizes the refrigeration of the data center by utilizing a natural cold source, improves the PUE value of the data center, and ensures the cooling effect of the data center while saving energy.
Description
Technical Field
The invention relates to the technical field of data center heat dissipation devices, in particular to a liquid cooling system combining a data center immersion type and an indirect contact type.
Background
The data center is a large-power-consumption household, the electronic information equipment and the refrigerating unit which run continuously all the year round can consume a large amount of electric energy, and the effective heat dissipation mode is adopted for the data center to reduce the power consumption of the refrigerating unit, so that the energy conservation of the whole data center is facilitated. And the coming of the 5G era must further increase the power consumption and heat dissipation of the data computer room, and bring new challenges to the existing heat dissipation technology of the data computer room.
Immersion liquid cooling is a new heat dissipation technology that has recently received much attention from the industry. Immersion liquid cooling has significant advantages. Firstly, in the immersion type liquid cooling, the cooling liquid is directly contacted with heating equipment, so that the convection resistance is low, and the heat transfer coefficient is high; secondly, the cooling liquid has higher heat conductivity and specific heat capacity, and the change rate of the operating temperature is smaller; thirdly, the mode does not need a fan, reduces energy consumption and noise and has high refrigeration efficiency; finally, the cooling liquid has excellent insulating property, high flash point and no flammability, and is non-toxic, harmless and non-corrosive. Therefore, the liquid cooling technology is suitable for large-scale data centers, super computing, industries and other computing fields and scientific research institutions with high requirements on heat flux density and green energy conservation, and particularly has obvious advantages for data centers which are located in severe cold and high altitude areas or have special terrain and limited space, have high requirements on environmental noise, are close to places where people work and live, and need to be muted. The single-phase direct immersion type liquid cooling means that the single-phase refrigerant does not change phase in the process of absorbing heat of a server, the single-phase refrigerant continuously circulates and flows under the driving of a pump, the single-phase refrigerant absorbs heat in a box body and rises the temperature, then flows out along a pipeline, enters a heat exchanger, and flows back to the box body again after heat exchange to complete one circulation. The single-phase refrigerant used by the single-phase direct immersion type liquid cooling has high viscosity coefficient and poor fluidity, increases the loss of a pump, and reduces the greening degree of a data center. Therefore, in order to solve the above technical problems, it is necessary to upgrade the existing single-phase immersion liquid cooling technology to achieve effective heat dissipation of the data center and effective control of the greening degree of the data center.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a liquid cooling system combining an immersion type liquid cooling system and an indirect contact type liquid cooling system, aiming at the problems of large pump loss, reduced greening degree of a data center and the like in the traditional single-phase direct immersion type liquid cooling, wherein the liquid cooling system can avoid the driving of a high-viscosity single-phase refrigerant by a pump and the circulating flow of the single-phase refrigerant outside a box body, and the heat dissipation system can completely replace a compressor to run all the year round, really realizes the refrigeration of the data center by utilizing a natural cold source, improves the PUE value of the data center, and ensures the cooling effect of the data center while saving energy.
The technical scheme is as follows: in order to achieve the purpose, the liquid cooling system with the combination of the immersion type and the indirect contact type of the data center structurally comprises a liquid cooling cabinet, a cold quantity distribution unit, a water chilling unit, a liquid storage tank and a refrigerant pump; the liquid cooling cabinet comprises a liquid cooling box body, a server and a layered cold plate; the single-phase refrigerant is filled in the box body, the server is immersed in the single-phase refrigerant, and the layered cold plate is fixed in the box body from top to bottom from sparse to dense; the inlet end of the layered cold plate is connected with the cold quantity distribution unit, and the cold plate is sequentially connected with the water pump, the liquid storage tank, the water chilling unit and the cold quantity distribution unit to form a circulation loop.
Preferably, the single-phase refrigerant is a fluorinated liquid with a boiling point lower than the normal working temperature of the server.
Preferably, the cold plates are arranged in parallel, and the flow of the refrigerant can be independently controlled by each cold plate.
Furthermore, the liquid cooling system also comprises a heat extraction device, wherein the heat extraction device is used for cooling high-temperature return water and can adopt an evaporative condenser or a cooling tower.
Further, the liquid cooling system further comprises a waste heat recovery device, and the waste heat recovery device is used for recovering and utilizing waste heat of hot water in the liquid storage tank.
The working principle of the liquid cooling system is as follows:
(1) the refrigerant flows through the pipeline by the refrigerant pump to flow to the layer-mounted cold plates which are non-uniformly arranged in the box body, the layer-mounted cold plates absorb heat generated by the server and transferred to a single refrigerant, and the cold plates on the upper part of the box body are denser and can carry away more heat, so that the density of the single-phase refrigerant on the upper part of the box body is higher, the single-phase refrigerant generates density difference with the single-phase refrigerant on the lower part of the box body, natural circulation is generated under the action of gravity, the heat exchange effect is improved, and disturbance of a circulation loop or.
(2) The hot water discharged from the refrigerant outlet of the liquid cooling box body reaches the liquid storage tank through the water collector, and part of heat is taken away through the waste heat recovery device.
(3) The refrigerant in the liquid storage tank further enters the water chilling unit, the temperature is reduced under the action of the heat extraction equipment, and the refrigerant flows into the cold plate of each layer through the cold quantity distribution unit to absorb the heat of the single-phase refrigerant.
Has the advantages that: compared with the prior art, the invention has the following beneficial effects:
(1) the layered cold plates are non-uniformly arranged in the box body, namely, the layered cold plates are fixed in the box body from top to bottom in a sparse mode, the heat exchange area is large, the single-phase refrigerant generates natural circulation in the box body due to density difference, and disturbance of a circulation loop or a propeller is not needed, so that the PUE value of a data center is improved. In addition, a single refrigerant density difference can be generated by adjusting the refrigerant flow of each layer of cold plate.
(2) The waste heat recovery device is used for taking away heat of a part of refrigerant in the liquid storage tank, so that the load of the water chilling unit is reduced on one hand, and on the other hand, recovered waste heat can be utilized, such as domestic hot water.
(3) The system realizes 'waterless' cooling of the server and realizes the operation of a compressor.
Drawings
FIG. 1 is a schematic diagram of a system architecture and circuitry according to an embodiment of the present invention;
FIG. 2 is a front view of an internal structure of a liquid-cooled cabinet according to an embodiment of the present invention;
fig. 3 is a top view of the internal structure of a liquid-cooled cabinet in an embodiment of the invention.
Description of reference numerals: 1-box, 2-single-phase refrigerant, 3-refrigerant inlet/outlet, 301-refrigerant inlet, 302-refrigerant outlet, 4-connecting piece, 5-layer cooling plate, 6-server, 7-server fastener, 8-connecting piece.
Detailed Description
The operation of the systems of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a liquid cooling system with a combination of an immersion type and an indirect contact type for a data center disclosed in the embodiment of the present invention structurally includes a liquid cooling cabinet, a cold energy distribution unit, a water chiller, a heat extraction device, a liquid storage tank, a refrigerant pump, a waste heat recovery device, and the like. As shown in fig. 2-3, the liquid-cooled cabinet comprises a liquid-cooled box body 1, a server 6 and a layered cold plate 5, wherein a single-phase refrigerant 2 is filled in the box body 1, the server 6 is immersed in the single-phase refrigerant 2, and the layered cold plate 5 is fixed in the box body 1 from bottom to top through connectors 4 and 8 for thinning to densifying. The single-phase refrigerant 2 adopts fluorinated liquid, and the boiling point is lower than the normal working temperature of the server 6. The layered cold plates 5 are installed in parallel and fixed in the box body 1 from bottom to top in a sparse mode, the refrigerant flow can be independently controlled by the layered cold plates 5, the refrigerant liquid inlet 301 of the layered cold plates 5 is connected with the cold quantity distribution unit, and the cold plates 5 are sequentially connected with the refrigerant pump, the liquid storage tank, the water chilling unit and the cold quantity distribution unit to form a circulation loop. The heat extraction equipment is used for cooling high-temperature return water and can adopt an evaporative condenser or a cooling tower. The waste heat recovery device is used for recovering and utilizing the waste heat of the hot water in the liquid storage tank.
The working process of the liquid cooling system of the embodiment of the invention is as follows:
the refrigerant flows through the pipeline by the refrigerant pump to flow to the layer-mounted cold plates 5 which are non-uniformly arranged in the box body 1, the layer-mounted cold plates 5 absorb heat generated by the server 6 and transferred to the single refrigerant 2, the cold plates 5 on the upper part of the box body 1 are denser and can carry away more heat, the density of the single-phase refrigerant 2 on the upper part of the box body 1 is higher, the density difference is generated between the single-phase refrigerant 2 on the upper part of the box body 1 and the single-phase refrigerant 2 on the lower part of the box body 1, natural circulation is generated under the action of gravity, the heat exchange effect. The hot water discharged from the refrigerant outlet 302 of the box body 1 reaches the liquid storage tank through the water collector, and part of the heat is taken away through the waste heat recovery device. The refrigerant in the liquid storage tank further enters the water chilling unit, the temperature is reduced under the action of the heat extraction equipment, and the refrigerant flows into the cold plates 5 of each layer through the cold quantity distribution unit to absorb the heat of the single-phase refrigerant 2.
The above description is only a preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (5)
1. The utility model provides a liquid cooling system of data center submergence formula and indirect contact combination which characterized in that: the system comprises a liquid cooling cabinet, a cold quantity distribution unit, a water chilling unit, a liquid storage tank and a refrigerant pump; the liquid cooling cabinet comprises a liquid cooling box body, a server and a layered cold plate; the single-phase refrigerant is filled in the box body, the server is immersed in the single-phase refrigerant, and the layered cold plate is fixed in the box body from top to bottom from sparse to dense; the inlet end of the layered cold plate is connected with the cold energy distribution unit, and the cold plate is sequentially connected with the refrigerant pump, the liquid storage tank, the water chilling unit and the cold energy distribution unit to form a circulation loop.
2. The data center immersion and indirect contact combination liquid cooling system of claim 1, wherein: the single-phase refrigerant adopts fluorinated liquid, and the boiling point of the single-phase refrigerant is lower than the normal working temperature of the server.
3. The data center immersion and indirect contact combination liquid cooling system of claim 1, wherein: the cold plates are arranged in parallel, and the flow of the refrigerant can be independently controlled by each cold plate.
4. The data center immersion and indirect contact combination liquid cooling system of claim 1, wherein: the system also comprises heat extraction equipment, wherein the heat extraction equipment is used for cooling the high-temperature return water and adopts an evaporative condenser or a cooling tower.
5. The data center immersion and indirect contact combination liquid cooling system of claim 1, wherein: the system also comprises a waste heat recovery device, and the waste heat recovery device is used for recovering and utilizing the waste heat of the hot water in the liquid storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010510229.5A CN111465299A (en) | 2020-06-08 | 2020-06-08 | Liquid cooling system combining data center immersion type and indirect contact type |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010510229.5A CN111465299A (en) | 2020-06-08 | 2020-06-08 | Liquid cooling system combining data center immersion type and indirect contact type |
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| CN111465299A true CN111465299A (en) | 2020-07-28 |
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| CN202010510229.5A Pending CN111465299A (en) | 2020-06-08 | 2020-06-08 | Liquid cooling system combining data center immersion type and indirect contact type |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112770597A (en) * | 2020-12-10 | 2021-05-07 | 国网浙江省电力有限公司杭州供电公司 | Cooling device for liquid cooling data center |
| CN112867341A (en) * | 2020-12-10 | 2021-05-28 | 国网浙江省电力有限公司双创中心 | Container type liquid cooling data center |
| CN113342144A (en) * | 2021-04-29 | 2021-09-03 | 山东英信计算机技术有限公司 | Liquid cooling server and external fence type water inlet flow regulator thereof |
| CN117055708A (en) * | 2023-10-10 | 2023-11-14 | 苏州元脑智能科技有限公司 | Server and liquid cooling system for server |
| US11889663B1 (en) | 2022-12-07 | 2024-01-30 | Southeast University | Immersion dual-cycle multi-mode liquid cooling regulation system and method for data center |
-
2020
- 2020-06-08 CN CN202010510229.5A patent/CN111465299A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112770597A (en) * | 2020-12-10 | 2021-05-07 | 国网浙江省电力有限公司杭州供电公司 | Cooling device for liquid cooling data center |
| CN112867341A (en) * | 2020-12-10 | 2021-05-28 | 国网浙江省电力有限公司双创中心 | Container type liquid cooling data center |
| CN112867341B (en) * | 2020-12-10 | 2023-05-30 | 国网浙江省电力有限公司双创中心 | Container type liquid cooling data center |
| CN112770597B (en) * | 2020-12-10 | 2023-07-07 | 国网浙江省电力有限公司杭州供电公司 | Cooling device for liquid cooling data center |
| CN113342144A (en) * | 2021-04-29 | 2021-09-03 | 山东英信计算机技术有限公司 | Liquid cooling server and external fence type water inlet flow regulator thereof |
| US11889663B1 (en) | 2022-12-07 | 2024-01-30 | Southeast University | Immersion dual-cycle multi-mode liquid cooling regulation system and method for data center |
| CN117055708A (en) * | 2023-10-10 | 2023-11-14 | 苏州元脑智能科技有限公司 | Server and liquid cooling system for server |
| CN117055708B (en) * | 2023-10-10 | 2024-01-23 | 苏州元脑智能科技有限公司 | Server and liquid cooling system for server |
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