A method of server immersion cooling

Abstract

The present application relates to the technical field of immersion cooling, in particular to a server immersion cooling method. The server immersion cooling method provided by the present application comprises the following steps: after the surface of the server is coated with a fluorinated liquid, the server is partially or entirely immersed in insulating oil. Before being immersed in the insulating oil, the server is coated with a layer of fluorinated liquid, so that the surface of the server is completely covered, a firm three-proofing coating is formed on the surface of the server, and after the coated server is immersed in the insulating oil and then taken out, the surface does not adhere to the insulating oil, so that when the server adopting the immersion insulating oil cooling needs to be returned to the factory for maintenance or the cooling mode is changed, the cleaning step is not needed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of immersion cooling technology, in particular to a method for immersion cooling of a server. BACKGROUND

[0002] With the rapid growth of technology, especially in the era of the rapid increase in demand for the Internet, artificial intelligence, and cloud services, the amount of data that data centers need to process is becoming increasingly large. In order to maintain or improve the processing efficiency of the data center, it is necessary to continuously and effectively cool the data center. However, due to the high power density of the data center, the heat generated is too large, and the traditional cooling method needs to be improved in power or scale. However, such a method is very energy-consuming, which greatly increases the cost and impact on the environment.

[0003] In recent years, cooling technologies such as immersion cooling have gradually attracted attention. Specifically, immersion cooling is to immerse the heat source of the data center, such as the motherboard and the electronic components thereon, in a cooling liquid. Since the server and the cooling liquid can be in full contact, immersion cooling can achieve higher cooling efficiency than traditional air cooling.

[0004] When the server using immersion insulation oil cooling needs to be repaired or the cooling method is changed, for example, from oil cooling to air cooling, the server needs to be cleaned first to remove the insulation oil attached to its surface to restore the clean state of the server surface. Currently, the cleaning method is to place the workpiece to be cleaned in an ultrasonic cleaning machine containing a special cleaning agent, and after multiple ultrasonic cleaning, it is finally low-temperature dried.

[0005] The special cleaning agent is generally a hydrocarbon cleaning agent, which is volatile, harmful to inhale, usually has a low flash point, and poses a risk of flammability and explosion in the cleaning workshop. The principle of cleaning is similar to that of solubility, and the cleaning agent after reaching saturation or after use cannot be directly discharged and must be recycled by a professional recycling company.

[0006] Therefore, the present application is proposed. SUMMARY

[0007] The purpose of the present application is to provide a method for immersion cooling of a server. Before the server is immersed in insulation oil, a layer of fluorinated liquid is applied to the server. After the server is immersed in insulation oil, the server is removed, and the surface does not adhere to the insulation oil. This allows the server using immersion insulation oil cooling to be repaired or to change the cooling method without the need for cleaning.

[0008] In order to achieve the above-mentioned purpose of the present application, the following technical solutions are adopted:

[0009] The application provides a method for server immersion cooling, comprising the following steps:

[0010] The server is partially or totally immersed in the insulating oil after the surface of the server is coated with the fluorinated liquid.

[0011] Further, the fluorinated liquid comprises one or more of KEY-113, KEY-114 and KEY-118.

[0012] Further, the fluorinated liquid is KEY-113.

[0013] Further, the thickness of the coating is 0.1-0.3 mm.

[0014] Further, the coating method comprises dip coating or spray coating.

[0015] Further, the dip coating comprises totally immersing the server in the fluorinated liquid.

[0016] Preferably, the immersing time is greater than or equal to 5 min.

[0017] Further, after the surface of the server is coated with the fluorinated liquid, the method further comprises drying.

[0018] Further, the drying temperature is 50-70 DEG C, and the drying time is 1-10 min.

[0019] Further, the insulating oil comprises one or more of silicone oil, mineral oil, hydrocarbon synthetic oil and PAO synthetic oil.

[0020] Further, the insulating oil is hydrocarbon synthetic oil.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] The application provides a method for server immersion cooling, the server is coated with a layer of fluorinated liquid before being immersed in insulating oil, so that the surface of the server is totally covered, a firm three-proofing coating layer is formed on the surface of the server, the server is immersed in insulating oil after being coated, and the surface does not adhere to the insulating oil, so that the server adopting immersion insulating oil cooling does not need to be cleaned when being returned to a factory for maintenance or changing a cooling mode.

[0023] The application adopts KEY-113, KEY-114 and KEY-118 fluorinated liquid as an isolation layer, the fluorinated liquid has strong combination with the surface of a general server, is not easy to fall off in an immersion liquid cooling cooling environment, and can be used for a long time. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be described clearly and completely in connection with the specific embodiments below, but those skilled in the art will understand that the following described embodiments are part of the embodiments of the present application, not all the embodiments, and are only used to illustrate the present application, and should not be regarded as limiting the scope of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The specific conditions not mentioned in the embodiments are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not marked with the manufacturer, which are all conventional products that can be purchased on the market.

[0025] The method for server immersion cooling according to the embodiments of the present application will be described in detail below.

[0026] A method for server immersion cooling is provided in some embodiments of the present application, comprising the following steps:

[0027] The server is partially or entirely immersed in the insulating oil after the surface of the server is coated with the fluorinated liquid.

[0028] The immersion cooling can achieve higher heat dissipation efficiency than the traditional air cooling. When the server using the immersion insulating oil cooling needs to be repaired in the factory or the cooling method is changed, for example, the oil cooling is changed to air cooling, the server needs to be cleaned first to remove the insulating oil adhered to the surface of the server to restore the clean state of the surface of the server.

[0029] In the method for server immersion cooling provided by the present application, the server is coated with a layer of fluorinated liquid before being immersed in the insulating oil, so that the fluorinated liquid completely covers the surface of the server, and a firm three-proofing coating layer can be formed on the surface of the server. After the coated server is immersed in the insulating oil and then taken out, the surface does not adhere to the insulating oil, so that the server using the immersion insulating oil cooling does not need to be cleaned to remove the insulating oil adhered to the surface of the server when the server needs to be repaired in the factory or the cooling method is changed.

[0030] In the method for server immersion cooling of the present application, the server surface is coated with a fluorinated liquid, and then directly contacted with the insulating oil, which has excellent heat dissipation effect. In the server, such as the mainboard and the electronic components thereon, such as capacitors, circuit boards, etc., can be in full contact with the insulating oil, which has higher heat dissipation efficiency.

[0031] In some embodiments of the present application, the immersion in insulating oil comprises: adding high-boiling insulating cooling liquid into the cabinet, the amount of which is enough to completely immerse the server to be placed; placing the server into the insulating cooling liquid; transferring the heat generated by the chips of the server during operation to the cooling liquid; pumping the cooling liquid reaching the process design temperature to the plate or shell heat exchanger to exchange heat with the cooling water cooled by the cooling tower or the dry cooler; and recycling the cooled cooling liquid back to the cabinet.

[0032] In some embodiments of the present application, the fluorinated liquid comprises one or more of KEY-113, KEY-114 and KEY-118; and the fluorinated liquid can be any one of KEY-113, KEY-114 and KEY-118 or a combination of two or three thereof.

[0033] In some embodiments of the present application, the fluorinated liquid further comprises dioctyl phthalate.

[0034] The above fluorinated liquid can be purchased from Shenzhen Huameiya Science and Technology Co., Ltd.

[0035] The fluorinated liquid is a chemical solvent, colorless and transparent, odorless, safe and non-toxic; due to its stable chemical inertness, insulation and non-flammable inert characteristics, it is applied in the electronic industry. It is generally used for cleaning circuit boards, or in the IT industry data center, used as cooling liquid for liquid cooling technology.

[0036] The present application uses the fluorinated liquid as the isolation layer of the server, which is used in the immersion liquid cooling cooling environment, so that the surface of the server does not adhere to the insulating oil.

[0037] In some embodiments of the present application, the fluorinated liquid is KEY-113.

[0038] KEY-113 fluorinated liquid is mainly fluorinated ether polymer, and using KEY-113 fluorinated liquid as the isolation layer can avoid cleaning when the server cooled by the insulating oil cooling liquid is returned to the factory for maintenance and switched to air cooling.

[0039] Other substances as the isolation layer are easy to fall off in the immersion liquid cooling cooling environment, and finally still need to be cleaned with organic solvents.

[0040] KEY-113 has strong combination with the surface of the server, and is not easy to fall off in the immersion liquid cooling cooling environment, and can be used for a long time at 70℃.

[0041] The server is a kind of computer, it runs faster than ordinary computer, load is higher, price is more expensive.Server provides computing or application service for other client (such as PC, smart phone, ATM and other terminal even large equipment such as train system) in network.The server has high-speed CPU operation ability, long-time reliable operation, powerful I / O external data throughput capacity and better scalability.

[0042] The kind of server, material and the like are not limited in the application, and general server can be used.The surface of KEY-113 and general server has strong bonding strength.

[0043] In some embodiments of the application, the thickness of the coating is 0.1-0.3 mm.For example, the thickness of the coating is 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm or 0.3 mm, etc.

[0044] In some embodiments of the application, the thickness of the coating is 0.2 mm.

[0045] In some embodiments of the application, the coating method includes dip coating or spray coating.

[0046] In some embodiments of the application, the dip coating includes completely immersing the server in the fluorinated liquid.

[0047] In some embodiments of the application, the immersion time is ≥5 min.

[0048] There are many electronic components on the server motherboard, such as capacitors, circuit boards and wires, and the immersion time is too short to completely cover the fluorinated liquid in the large number of small spaces inside the server.The immersion time is not strictly limited in the application, and can be adjusted according to the actual situation of the server, as long as the surface of the server is completely covered with the fluorinated liquid.

[0049] In some embodiments of the application, after the server surface is coated with the fluorinated liquid, drying is further included.

[0050] In some embodiments of the application, the drying temperature is 50-70 ℃, and the drying time is 1-10 min.For example, the drying temperature is 50 ℃, 55 ℃, 60 ℃, 65 ℃ or 70 ℃, etc., and the drying time is 1 min, 2 min, 4 min, 6 min, 8 min or 10 min, etc.

[0051] In some specific embodiments of the application, the server immersion cooling method includes the following steps:

[0052] After the server surface is coated with KEY-113, it is dried at 50-70°C for 1-10 min, and then partially or entirely immersed in insulating oil.

[0053] In some embodiments of the present application, the insulating oil comprises one or more of silicone oil, mineral oil, hydrocarbon synthetic oil, and PAO synthetic oil.

[0054] The present application immerses the server in insulating oil, so as to achieve the purpose of cooling and dissipating heat of the server.

[0055] In some embodiments of the present application, the insulating oil is hydrocarbon synthetic oil; more preferably, the hydrocarbon synthetic oil comprises GTL synthetic oil of Shell.

[0056] Example 1

[0057] The method for server immersion cooling provided in this example comprises the following steps:

[0058] (a) The server is completely immersed in KEY-113 fluorinated liquid, and after soaking for 5 min, it is taken out and drained, and then placed in a forced air drying oven for drying at 70°C for 5 min; after drying, the thickness of the fluorinated liquid layer on the surface of the server is 0.3 mm;

[0059] (b) The dried server is then immersed in hydrocarbon synthetic insulating oil in the liquid cooling cabinet, specifically GTL synthetic oil of Shell, 40°C viscosity 9.8 mm 2 / s; the heat generated by the chips during the operation of the server is transferred to the hydrocarbon synthetic insulating oil, and the hydrocarbon synthetic insulating oil reaching the process design temperature is pumped to a plate or shell heat exchanger to exchange heat with cooled water cooled by a cooling tower or a dry cooler, and the cooled hydrocarbon synthetic insulating oil is recycled back to the cabinet.

[0060] Example 2

[0061] The method for server immersion cooling provided in this example comprises the following steps:

[0062] (a) The server is completely immersed in KEY-114 fluorinated liquid, and after soaking for 5 min, it is taken out and drained, and then placed in a forced air drying oven for drying at 70°C for 5 min; after drying, the thickness of the fluorinated liquid layer on the surface of the server is 0.27 mm;

[0063] (b) The dried server is then immersed in hydrocarbon synthetic insulating oil in the liquid cooling cabinet, specifically GTL synthetic oil of Shell, 40°C viscosity 9.8 mm 2The heat generated by the server during operation is transferred to the hydrocarbon synthetic insulating oil, and the hydrocarbon synthetic insulating oil reaching the process design temperature is pumped into the plate or shell heat exchanger to exchange heat with the cooling water cooled by the cooling tower or the dry cooler, and the cooled hydrocarbon synthetic insulating oil is recycled back to the cabinet.

[0064] Example 3

[0065] The server immersion cooling method provided in the embodiment includes the following steps:

[0066] (a) The server is completely immersed in the KEY-118 fluorinated liquid, and after soaking for 5 min, it is taken out and drained, and placed in a forced air drying oven at 70°C for drying for 5 min; after drying, the thickness of the fluorinated liquid layer on the surface of the server is 0.15 mm;

[0067] (b) The dried server is immersed in the hydrocarbon synthetic insulating oil in the liquid cooling cabinet, and specifically, the GTL synthetic oil of Shell is used, which has a viscosity of 9.8 mm 2 / s; The heat generated by the server during operation is transferred to the hydrocarbon synthetic insulating oil, and the hydrocarbon synthetic insulating oil reaching the process design temperature is pumped into the plate or shell heat exchanger to exchange heat with the cooling water cooled by the cooling tower or the dry cooler, and the cooled hydrocarbon synthetic insulating oil is recycled back to the cabinet.

[0068] Example 4

[0069] The server immersion cooling method provided in the embodiment includes the following steps:

[0070] (a) The surface of the server is sprayed with a layer of KEY-113 fluorinated liquid with a thickness of 0.3 mm, and then placed in a forced air drying oven at 70°C for drying for 5 min;

[0071] After drying, the thickness of the fluorinated liquid layer on the surface of the server is 0.3 mm;

[0072] (b) The dried server is immersed in the hydrocarbon synthetic insulating oil in the liquid cooling cabinet, and specifically, the GTL synthetic oil of Shell is used, which has a viscosity of 9.8 mm 2 / s; The heat generated by the server during operation is transferred to the hydrocarbon synthetic insulating oil, and the hydrocarbon synthetic insulating oil reaching the process design temperature is pumped into the plate or shell heat exchanger to exchange heat with the cooling water cooled by the cooling tower or the dry cooler, and the cooled hydrocarbon synthetic insulating oil is recycled back to the cabinet.

[0073] Example 5

[0074] The server immersion cooling method provided in the embodiment includes the following steps:

[0075] (a) The server was completely immersed in KEY-113 fluorinated liquid for 5 minutes, then removed and drained, and placed in a forced-air drying oven at 70°C for 5 minutes; after drying, the thickness of the fluorinated liquid layer on the server surface was 0.3 mm.

[0076] (b) The dried server is then immersed in PAO-2 coolant in the liquid-cooled cabinet; the heat generated by the chip during server operation is transferred to PAO-2 coolant, and the PAO-2 coolant that reaches the process design temperature is pumped to a plate or shell-and-tube heat exchanger to exchange heat with the cooling water that has been cooled by a cooling tower or dry cooler. The cooled PAO-2 coolant is then circulated back to the cabinet.

[0077] Example 6

[0078] The server immersion cooling method provided in this embodiment includes the following steps:

[0079] (a) The server was completely immersed in KEY-113 fluorinated liquid for 5 minutes, then removed and drained, and placed in a forced-air drying oven at 70°C for 5 minutes; after drying, the thickness of the fluorinated liquid layer on the server surface was 0.3 mm.

[0080] (b) The dried server is then immersed in dimethyl silicone oil in a liquid-cooled cabinet at 25°C with a viscosity of 30 mm. 2 / s; During server operation, the heat generated by the chip is transferred to dimethyl silicone oil. Once the dimethyl silicone oil reaches the process design temperature, it is pumped to a plate or shell-and-tube heat exchanger to exchange heat with the cooling water that has been cooled by a cooling tower or dry cooler. The cooled dimethyl silicone oil is then circulated back into the rack.

[0081] Example 7

[0082] The server immersion cooling method provided in this embodiment includes the following steps:

[0083] (a) The server was completely immersed in KEY-113 fluorinated liquid for 5 minutes, then removed and drained, and placed in a forced-air drying oven at 70°C for 5 minutes; after drying, the thickness of the fluorinated liquid layer on the server surface was 0.3 mm.

[0084] (b) The dried server is then immersed in 25# transformer oil in the liquid-cooled cabinet; the heat generated by the chip during the operation of the server is transferred to the 25# transformer oil, and the 25# transformer oil that has reached the process design temperature is pumped to a plate or shell-and-tube heat exchanger to exchange heat with the cooling water that has been cooled by a cooling tower or dry cooler. The cooled 25# transformer oil is then circulated back to the cabinet.

[0085] Comparative Example 1

[0086] The method for server immersion cooling provided by the embodiment comprises the following steps:

[0087] (a) The server is completely immersed in FC-40 fluorinated liquid, and after soaking for 5 min, it is taken out and drained, and placed in a forced air drying oven for drying at 70°C for 5 min; after drying, the thickness of the fluorinated liquid layer on the surface of the server is 0.3 mm;

[0088] (b) The dried server is then immersed in PAO-2 insulating oil in a liquid cooling cabinet; the heat generated by the chip during the operation of the server is transferred to the PAO-2 cooling liquid, and the PAO-2 cooling liquid reaching the process design temperature is pumped into a plate or shell heat exchanger to exchange heat with the cooling water cooled by a cooling tower or a dry cooler, and the cooled PAO-2 cooling liquid is recycled back to the cabinet.

[0089] Test Example 1

[0090] The server surface immersed in insulating oil in Examples 1-7 and Comparative Example 1 is tested for whether it adsorbs insulating oil, the method used is that the treated server is taken out from the cooling liquid multiple times, whether the surface adsorbs insulating oil is observed, and the maximum number of times the server surface does not adsorb an oil film (no oil film indicates that the server does not use a hydrocarbon solvent to remove the insulating oil adsorbed on the surface) is recorded, and the results are shown in Table 1.

[0091] Table 1

[0092]

[0093]

[0094] The heat dissipation effect of Examples 1-7 is tested, the method used is that the temperature of the heat-generating core CPU and GPU of the server is recorded, whether the core temperature rises is observed, the temperature rise indicates that the heat is not dissipated, and whether the formed coating has an influence on heat dissipation is judged. The results are shown in Table 2.

[0095] Table 2

[0096] Heat dissipation effect Example 1 No effect Example 2 No effect Example 3 No effect Example 4 No effect Example 5 No effect Example 6 No effect Example 7 No effect

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for part or all of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of server immersion cooling, characterized by, The method comprises the following steps: After the server surface is coated with the fluorinated liquid, the server is partially or totally immersed in the insulating oil; The fluorinated liquid comprises one or more of KEY-113, KEY-114 and KEY-118; After the server surface is coated with the fluorinated liquid, the method further comprises drying; The insulating oil comprises one or more of silicon oil, mineral oil, hydrocarbon synthetic oil and PAO synthetic oil; The fluorinated liquid further comprises dioctyl phthalate; The server forms a solid three-proofing coating on the server surface before being immersed in the insulating oil.

2. The method of server immersion cooling of claim 1, wherein, The fluorinated liquid is KEY-113.

3. The method of server immersion cooling of claim 1, wherein, The thickness of the coating is 0.1-0.3mm.

4. The method of server immersion cooling of claim 1, wherein, The coating method comprises dip coating or spray coating.

5. The method of server immersion cooling of claim 4, wherein, The dip coating comprises totally immersing the server in the fluorinated liquid; Preferably, the immersing time is ≥5min.

6. The method of server immersion cooling of claim 1, wherein, The drying temperature is 50-70℃, and the drying time is 1-10min.

7. The method of server immersion cooling of claim 1, wherein, The insulating oil is hydrocarbon synthetic oil.

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