Immersion Cooling Liquid Composition for Swelling and Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cooling liquids for immersion cooling systems can affect the immersed electronic devices by causing swelling of insulating materials and metal elution, and they lack sufficient thermal stability.
Innovation Solution
A cooling liquid comprising hydrocarbon oil and antioxidants, with specific viscosity, distillation temperatures, and CN values, is used to suppress swelling and improve thermal stability, ensuring minimal impact on electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a liquid cooling medium containing ester and triglyceride is used, then cooling efficiency is improved, but thermal stability deteriorates and metal elution occurs
Solution Approach 1:
The patent changes the chemical composition parameters by specifying precise ranges for ester content (5-50 mass%), triglyceride content (45-90 mass%), and viscosity (28-38 cSt at 40°C). These parameter changes optimize both cooling efficiency and thermal stability simultaneously, resolving the contradiction between the two properties.
Solution Approach 2:
The patent creates a composite cooling medium by combining ester and triglyceride in specific proportions. This composite formulation leverages the complementary properties of both substances: ester provides good cooling efficiency while triglyceride enhances thermal stability, achieving a balance that neither substance could achieve alone.
2Ease of operation
If a liquid cooling medium with lower viscosity is used, then circulation is improved, but swelling of insulating material increases
Solution Approach 1:
The patent sets a specific viscosity range (28-38 cSt at 40°C) that balances circulation performance and swelling suppression. This parameter optimization ensures the cooling medium flows adequately through the system while maintaining sufficient viscosity to prevent swelling of insulating materials, resolving the contradiction between ease of circulation and harmful swelling effects.
3Reliability
If a liquid cooling medium with higher flash point is used, then safety is improved, but viscosity increases
Solution Approach 1:
The patent optimizes the composition parameters to achieve a flash point of 150°C or higher while maintaining viscosity within the acceptable range of 28-38 cSt at 40°C. By carefully controlling the ester-to-triglyceride ratio and other compositional parameters, the patent decouples the typical trade-off between flash point and viscosity, simultaneously achieving high safety and acceptable fluidity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances thermal stability and reduces the impact on electronic devices by suppressing swelling of insulating materials while maintaining effective circulation and cooling performance.
Implementation Method 1
The cooling liquid for an immersion cooling system, which has been heated by heat dissipation of the electronic device
Implementation Method 2
The cooling liquid for an immersion cooling system, which has been cooled by the heat exchange, is circulated again to the liquid immersion tank 1
Implementation Method 3
is heat-exchanged with cooling water produced by the cooling device 7 in the heat exchanger 3
Data Source
AI summary
A cooling liquid for an immersion cooling system is provided, which is contained in a liquid immersion tank of an immersion cooling system as a cooling liquid, the cooling liquid containing a hydrocarbon oil and one or more antioxidants selected from the group consisting of an amine-based antioxidant and a phenol-based antioxidant, in which the hydrocarbon oil is contained in an amount of 50% by mass or more with respect to the total amount of the cooling liquid for an immersion cooling system, a 5% distillation temperature of the cooling liquid for an immersion cooling system is 320° C. or higher, a % CN is 30.0 or less, and a kinematic viscosity at 40° C. is 11.5 mm2/s or more.