Biodegradable Immersion Cooling Fluid With Low-Aromatic Isoparaffins
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Solution Overview
Problem
Existing cooling fluids for data centers, particularly those used in direct single-phase immersion, are not biodegradable and contain high levels of aromatics, leading to environmental impact and health risks for operators.
Innovation Solution
A composition comprising at least 90% isoparaffins and less than 100 ppm aromatics, with a 28-day biodegradability of at least 60%, is used as a cooling fluid, offering improved stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fluorocarbon compounds are used as cooling liquid via direct single-phase immersion, then cooling efficiency is improved, but environmental impact worsens due to high Global Warming Potential and ozone layer impact
Solution Approach 1:
The patent changes the chemical composition parameters of the cooling fluid by using hydrocarbons with specific characteristics (aromatic content between 1% and 10%, biodegradability at least 40%) instead of fluorocarbon compounds. This parameter change maintains cooling efficiency while eliminating the high global warming potential and ozone layer impact associated with fluorocarbons.
2Reliability
If biobased fluid with high aromatics content is used as cooling liquid, then biodegradability is improved, but health and comfort of operators worsens due to irritation problems
Solution Approach 1:
The patent optimizes the aromatics content parameter to a specific range (1% to 10% by weight) rather than using high aromatics content. This parameter optimization maintains adequate biodegradability (at least 40%) while reducing operator irritation to acceptable levels, resolving the contradiction between biodegradability and operator comfort.
3Reliability
If hydrocarbon fluid with high aromatics content is used, then biodegradability is improved, but lifetime of the fluid worsens
Solution Approach 1:
The patent changes the aromatics content parameter to a moderate range (1% to 10%) rather than high levels, which balances biodegradability (at least 40%) with fluid stability and lifetime. This parameter optimization prevents excessive degradation while maintaining adequate environmental breakdown capability.
Solution Approach 2:
The patent uses a composite hydrocarbon composition combining multiple components (cyclic hydrocarbons, aromatic hydrocarbons in controlled amounts, and other hydrocarbons) to achieve both biodegradability and long lifetime. The synergistic combination of these components resolves the contradiction between biodegradability and fluid stability.
4Reliability
If cooling fluid with high aromatics content is used, then biodegradability is improved, but stability and safety of the fluid worsens
Solution Approach 1:
The patent changes the aromatics content parameter to a moderate range (1% to 10%) rather than high levels, which maintains adequate biodegradability (at least 40%) while preserving fluid stability and safety. This parameter optimization prevents composition degradation while maintaining environmental breakdown capability.
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 provides a cooling fluid with extended lifespan, reduced irritancy, and enhanced safety, ensuring stability and biodegradability, thus addressing the environmental and health concerns of previous fluids.
Implementation Method 1
Liquid cooling via single-phase direct immersion means that the cooling liquid does not undergo a phase change during the cooling process (heat dissipation) of equipment in data centers
Data Source
AI summary
The invention concerns the use as cooling fluid, via direct immersion, of a composition comprising 80 to 100 weight % of a hydrocarbon fluid relative to the total weight of the composition, said hydrocarbon fluid comprising at least 90 weight % of a hydrocarbon fluid comprising at least 90 weight % of isoparaffins and less than 100 ppm by weight of aromatics relative to the total weight of the hydrocarbon fluid, said hydrocarbon fluid having 28-day biodegradability measured according to standard OECD 301B higher than or equal to 60%.