Oil-based cooling liquid for data center and preparation method of oil-based cooling liquid

Abstract

The invention discloses oil-based cooling liquid for a data center and a preparation method of the oil-based cooling liquid, and relates to the technical field of liquid coolant.The oil-based cooling liquid is prepared by taking base oil as a main component, adding a proper amount of heat-conducting filler, a dispersing agent, a coupling agent, an antioxidant, a corrosion inhibitor and a defoaming agent as auxiliary components and simply stirring and mixing; the cooling liquid is high in heat dissipation efficiency, good in fluidity, good in storage stability and chemical stability, low in volatility, high in safety and suitable for immersed cooling of the data center.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling, and in particular to an oil-based cooling liquid for a data center and a preparation method thereof. Background Art

[0002] As electricity consumption increases day by day, equipment operation generates huge amounts of heat, and the cooling system of data centers has great energy-saving potential. In the data centers currently in operation, cooling is mainly based on air cooling, which has low energy utilization.

[0003] Data center server cabinets are divided into low power density cabinets (<5kW / r), medium power density cabinets (5-10kW / r) and high power density cabinets (>10kW / r) according to power. Currently, the data center cabinets in use are mainly medium power density cabinets. The power density of super large data center cabinets exceeds 30kW / r, or even 100kW / r.

[0004] Air cooling is suitable for cabinets with low power density, and can cool cabinets with a maximum of 30kW / r. Natural air cooling has poor cooling effect and has been eliminated. Forced air cooling uses fans to force air convection and is the most widely used cooling method in data centers. Among them, air conditioning refrigeration is easy to maintain, but the cooling effect is low; fresh air cooling saves about 40% energy compared to air conditioning refrigeration, which can save a lot of cooling costs, but is sensitive to air conditions. Conventional air cooling is difficult to meet the ultra-high heat dissipation requirements of data centers, and liquid cooling, especially immersion liquid cooling, has attracted much attention in the industry. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an oil-based coolant for data centers and a preparation method thereof, wherein the obtained coolant has the characteristics of high heat dissipation efficiency, good fluidity, good storage stability and chemical stability, low volatility, high safety, etc.

[0006] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0007] The first object of the present invention is to provide an oil-based coolant for a data center, comprising the following components in weight percentage:

[0008]

[0009] Furthermore, the base oil is a GTL base oil. The GTL base oil has a high saturated hydrocarbon content, is substantially free of nitrogen and sulfur, has no aromatics, is 100% isoparaffin, has excellent oxidation stability and low-temperature performance, has low volatility, and has an extremely high viscosity index. It can be used to blend high-grade internal combustion engine oils and automatic transmission fluids, meeting the needs of high-standard lubricant products.

[0010] Furthermore, the thermal conductive filler is one or more of aluminum nitride, silicon nitride, boron nitride, aluminum oxide, silicon oxide, magnesium oxide, zinc oxide, and silicon carbide. The role of the thermal conductive filler in the coolant is to effectively transfer heat to ensure the normal operation of the data center.

[0011] Furthermore, the dispersant is a succinimide dispersant. The role of the dispersant in the coolant is to promote uniform dispersion of components, prevent aggregation or precipitation of components, maintain the stability and fluidity of the coolant, extend the service life of the coolant, and enable the coolant to exert the expected cooling efficiency.

[0012] Furthermore, the coupling agent is one or more of a silane coupling agent, a titanate coupling agent, and a fluorosilane coupling agent. The coupling agent is used to improve the compatibility of the thermal conductive filler with the base oil and promote the uniform dispersion of the thermal conductive filler in the coolant.

[0013] Furthermore, the antioxidant is one or more of phenolic antioxidants and amine antioxidants. The function of the antioxidant is to prevent the coolant from oxidizing during use, maintain the stability and effectiveness of the coolant, and extend the service life of the coolant.

[0014] Furthermore, the corrosion inhibitor is one or more of benzotriazole and its derivatives, thiadiazole and its derivatives. The function of the corrosion inhibitor is to reduce metal corrosion, improve the durability of the cooling system, and extend the service life of the cooling system.

[0015] Furthermore, the defoamer is one or more of a polyether defoamer, a silicone defoamer, and a polyether-modified silicone defoamer. The function of the defoamer is to inhibit foam generation, improve exhaust, and ensure the fluidity and heat dissipation effect of the coolant.

[0016] The second object of the present invention is to provide a method for preparing an oil-based coolant for a data center, wherein a thermal conductive filler, a dispersant, a coupling agent, an antioxidant, a corrosion inhibitor and a defoaming agent are added to the base oil, and the mixture is stirred evenly to obtain the coolant.

[0017] The beneficial effects of the present invention are as follows: the present invention uses base oil as a main component, and adds appropriate amounts of thermal conductive fillers, dispersants, coupling agents, antioxidants, corrosion inhibitors and defoaming agents as auxiliary components, and an oil-based coolant can be prepared by simple stirring and mixing; the coolant has high heat dissipation efficiency, good fluidity, good storage stability and chemical stability, low volatility, high safety, and is suitable for immersion cooling in data centers. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0019] The present invention provides an oil-based coolant for a data center, comprising the following components in percentage by weight:

[0020]

[0021] In order to further improve the performance of the coolant, the present invention also adds modified silicone oil as a component on the basis of the above coolant.

[0022] The present invention also provides a modified silicone oil-based coolant for a data center, comprising the following components in percentage by weight:

[0023]

[0024] Antioxidant 0.05~0.5%

[0025] Corrosion inhibitor 0.05~0.5%

[0026] Defoamer 0.05~0.5%

[0027] The balance is base oil.

[0028] Furthermore, the base oil is a GTL base oil. The GTL base oil has a high saturated hydrocarbon content, is substantially free of nitrogen and sulfur, has no aromatics, is 100% isoparaffin, has excellent oxidation stability and low-temperature performance, has low volatility, and has an extremely high viscosity index. It can be used to blend high-grade internal combustion engine oils and automatic transmission fluids, meeting the needs of high-standard lubricant products.

[0029] Furthermore, the thermal conductive filler is one or more of aluminum nitride, silicon nitride, boron nitride, aluminum oxide, silicon oxide, magnesium oxide, zinc oxide, and silicon carbide. The role of the thermal conductive filler in the coolant is to effectively transfer heat to ensure the normal operation of the data center.

[0030] Furthermore, the dispersant is a succinimide dispersant. The role of the dispersant in the coolant is to promote uniform dispersion of components, prevent aggregation or precipitation of components, maintain the stability and fluidity of the coolant, extend the service life of the coolant, and enable the coolant to exert the expected cooling efficiency.

[0031] Furthermore, the coupling agent is one or more of a silane coupling agent, a titanate coupling agent, and a fluorosilane coupling agent. The coupling agent is used to improve the compatibility of the thermal conductive filler with the base oil and promote the uniform dispersion of the thermal conductive filler in the coolant.

[0032] Furthermore, the antioxidant is one or more of phenolic antioxidants and amine antioxidants. The function of the antioxidant is to prevent the coolant from oxidizing during use, maintain the stability and effectiveness of the coolant, and extend the service life of the coolant.

[0033] Furthermore, the corrosion inhibitor is one or more of benzotriazole and its derivatives, thiadiazole and its derivatives. The function of the corrosion inhibitor is to reduce metal corrosion, improve the durability of the cooling system, and extend the service life of the cooling system.

[0034] Furthermore, the defoamer is one or more of a polyether defoamer, a silicone defoamer, and a polyether-modified silicone defoamer. The function of the defoamer is to inhibit foam generation, improve exhaust, and ensure the fluidity and heat dissipation effect of the coolant.

[0035] Furthermore, the modified silicone oil is a thiourea grafted modified silicone oil, and its preparation method is: adding double-terminal hydrogen-containing silicone oil, 1,3-diallyl-2-thiourea and chloroplatinic acid to an organic solvent, carrying out a hydrosilylation reaction under nitrogen protection, and after the reaction is completed, removing the organic solvent by reduced pressure distillation to obtain the thiourea grafted modified silicone oil.

[0036] Preferably, the organic solvent is one or more of methanol, isopropanol, acetone, toluene and tetrahydrofuran.

[0037] Preferably, the molar ratio of the double-terminal hydrogen-containing silicone oil to 1,3-diallyl-2-thiourea is 1:(1-2).

[0038] Preferably, the amount of chloroplatinic acid used is 30-50 ppm of the mass of the terminal hydrogen-containing silicone oil.

[0039] Common catalysts for the hydrosilylation reaction include platinum compounds, palladium compounds, rhodium compounds, nickel compounds and other metal compounds, among which platinum compounds include chloroplatinic acid and palladium compounds include tetrakis(triphenylphosphine)palladium, bistriphenylphosphine palladium dichloride and the like.

[0040] The invention provides a method for preparing an oil-based coolant for a data center. A heat-conducting filler, a dispersant, a coupling agent, an antioxidant, a corrosion inhibitor and a defoaming agent are added to a base oil, and the mixture is stirred evenly to obtain the coolant.

[0041] The present invention also provides a method for preparing an oil-based coolant for a data center, comprising adding modified silicone oil to a base oil, stirring the mixture evenly, and obtaining a mixed oil; and adding a thermal conductive filler, a dispersant, a coupling agent, an antioxidant, a corrosion inhibitor, and a defoaming agent to the mixed oil, stirring the mixture evenly, and obtaining a coolant.

[0042] The base oil in the following examples and comparative examples is Shell GTL GS 310 base oil; the hydrogen content of the double-terminal hydrogen-containing silicone oil is 0.19 mmol / g; and the allyl polyether is APEG-700.

[0043] Example 1

[0044]

[0045] Preparation of coolant: Add heat-conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoamer into the base oil according to the above weight ratio, stir evenly to obtain coolant.

[0046] Example 2

[0047]

[0048] Preparation of coolant: Add heat-conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoamer into the base oil according to the above weight ratio, stir evenly to obtain coolant.

[0049] Example 3

[0050]

[0051] Preparation of coolant: Add heat-conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoamer into the base oil according to the above weight ratio, stir evenly to obtain coolant.

[0052] Example 4

[0053]

[0054]

[0055] Preparation of coolant: Add heat-conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoamer into the base oil according to the above weight ratio, stir evenly to obtain coolant.

[0056] Example 5

[0057]

[0058] Preparation of coolant: Add heat-conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoamer into the base oil according to the above weight ratio, stir evenly to obtain coolant.

[0059] Example 6

[0060] Example 6 is based on Example 1 and contains thiourea grafted modified silicone oil.

[0061]

[0062] Preparation of thiourea grafted modified silicone oil: Add 0.1 mol of double-terminal hydrogenated silicone oil, 0.1 mol of 1,3-diallyl-2-thiourea and chloroplatinic acid to isopropanol, the amount of chloroplatinic acid is 50 ppm of the mass of the end-hydrogenated silicone oil, heat to 80°C under nitrogen protection and react for 5 hours. After the reaction, remove isopropanol by reduced pressure distillation to obtain thiourea grafted modified silicone oil.

[0063] Preparation of coolant: add thiourea grafted modified silicone oil to the base oil according to the above weight ratio, stir evenly to obtain a mixed oil; add thermal conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoaming agent to the mixed oil, stir evenly to obtain a coolant.

[0064] Example 7

[0065] Example 7 is based on Example 1 and adds thiourea grafted modified silicone oil.

[0066]

[0067] Preparation of thiourea grafted modified silicone oil: Add 0.1 mol of double-terminal hydrogenated silicone oil, 0.2 mol of 1,3-diallyl-2-thiourea and chloroplatinic acid to isopropanol, the amount of chloroplatinic acid used is 30 ppm of the mass of the end-hydrogenated silicone oil, heat to 80°C under nitrogen protection and react for 5 hours. After the reaction, remove isopropanol by reduced pressure distillation to obtain thiourea grafted modified silicone oil.

[0068] Preparation of coolant: add thiourea grafted modified silicone oil to the base oil according to the above weight ratio, stir evenly to obtain a mixed oil; add thermal conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoaming agent to the mixed oil, stir evenly to obtain a coolant.

[0069] Comparative Example 1

[0070] Comparative Example 1 is based on Example 1 and polyether grafted modified silicone oil is added.

[0071]

[0072] Preparation of polyether grafted modified silicone oil: Add 0.1 mol of double-terminal hydrogenated silicone oil, 0.2 mol of allyl polyether and chloroplatinic acid to isopropanol, the amount of chloroplatinic acid used is 30 ppm of the mass of the end-terminal hydrogenated silicone oil, heat to 80°C under nitrogen protection and react for 5 hours. After the reaction is completed, remove isopropanol by reduced pressure distillation to obtain polyether grafted modified silicone oil.

[0073] Preparation of coolant: add polyether grafted modified silicone oil to the base oil according to the above weight ratio, stir evenly to obtain mixed oil; add thermal conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoaming agent to the mixed oil, stir evenly to obtain coolant.

[0074] Comparative Example 2

[0075] Comparative Example 2 is based on Example 1, but double-terminal hydrogenated silicone oil is added.

[0076]

[0077] Preparation of coolant: add double-ended hydrogenated silicone oil to the base oil according to the above weight ratio, stir evenly to obtain a mixed oil; add thermal conductive filler, dispersant, coupling agent, antioxidant, corrosion inhibitor and defoaming agent to the mixed oil, stir evenly to obtain a coolant.

[0078] The cooling liquids prepared in the above examples and comparative examples were tested for thermal conductivity, and the test results are shown in Table 1.

[0079] Thermal conductivity is tested according to standard ASTM D7896-19. The higher the thermal conductivity, the better the thermal conductivity.

[0080] Table 1

[0081] Thermal conductivity (40℃, W / mK) Example 1 0.187 Example 2 0.181 Example 3 0.179 Example 4 0.175 Example 5 0.184 Example 6 0.196 Example 7 0.205 Comparative Example 1 0.172 Comparative Example 2 0.163

[0082] It can be seen from Table 1 that the coolant prepared in the embodiment of the present invention has excellent thermal conductivity, and the addition of thiourea grafted modified silicone oil is beneficial to further improve the thermal conductivity of the coolant; compared with the unchemically modified double-terminal hydrogen-containing silicone oil, the use of 1,3-diallyl-2-thiourea to graft-modify the double-terminal hydrogen-containing silicone oil can make the prepared coolant have better thermal conductivity.

[0083] The above shows and describes the basic principles and main features of the present invention and the 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 to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An oil-based coolant for a data center, characterized in that: The composition includes the following weight percentages: The balance is base oil.

2. The oil-based coolant for data center according to claim 1, characterized in that: The base oil is GTL base oil.

3. The oil-based coolant for data center according to claim 1, characterized in that: The thermal conductive filler is one or more of aluminum nitride, silicon nitride, boron nitride, aluminum oxide, silicon oxide, magnesium oxide, zinc oxide, and silicon carbide.

4. The oil-based coolant for data center according to claim 1, characterized in that: The dispersant is a succinimide dispersant.

5. The oil-based coolant for data center according to claim 1, characterized in that: The coupling agent is one or more of a silane coupling agent, a titanate coupling agent, and a fluorosilane coupling agent.

6. The oil-based coolant for data center according to claim 1, characterized in that: The antioxidant is one or more of phenolic antioxidants and amine antioxidants.

7. The oil-based coolant for data center according to claim 1, characterized in that: The corrosion inhibitor is one or more of benzotriazole and its derivatives, thiadiazole and its derivatives.

8. The oil-based coolant for data center according to claim 1, characterized in that: The defoamer is one or more of a polyether defoamer, a silicone defoamer, and a polyether-modified silicone defoamer.

9. The method for preparing the oil-based coolant for data center according to any one of claims 1 to 8, characterized in that: Add heat-conductive filler, dispersant, antioxidant, corrosion inhibitor and defoamer into base oil, stir evenly, and obtain coolant.

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