Fluorinated Vinyl Ether Heat Transfer Fluids With Low GWP
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Solution Overview
Problem
Existing heat transfer fluids used in industrial applications, such as in server farms and semiconductor manufacturing, often have high Global Warming Potential (GWP) values, which are detrimental to the environment, and are either toxic, non-biodegradable, or flammable, limiting their effectiveness and safety.
Innovation Solution
The use of heat transfer fluids comprising chemical compounds with the general formula Rf-O-CF2-O-CX=CYZ, where Rf is a partially or fully fluorinated carbon chain, and X, Y, Z are halogens or hydrogen, with at least one being a halogen, providing a balance of low GWP, non-flammability, and excellent dielectric and thermal properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional heat transfer fluids (CFCs, HFCs, PFPEs) are used, then effective heat transfer is achieved, but high GWP and environmental harm occur
Solution Approach 1:
The patent modifies the chemical structure of fluorinated heat transfer fluids by changing the ratio of fluorine to hydrogen atoms and introducing vinyl ether groups, which fundamentally alters the GWP parameter while maintaining thermal performance. This structural parameter change enables low GWP (<30) while preserving heat transfer efficiency.
Solution Approach 2:
The invention creates composite molecular structures combining fluorinated alkyl chains with vinyl ether functional groups (Rf-O-CF2-O-CX=CYZ). This composite approach integrates the beneficial properties of fluorinated compounds (chemical inertness, dielectric properties) with vinyl ether groups (low GWP, reduced atmospheric persistence).
2Loss of energy
If ammonia or ethylene glycol are used as heat transfer fluids, then cost-effective heat transfer is achieved, but toxicity increases
Solution Approach 1:
The patent develops heat transfer fluids with intentionally reduced atmospheric lifetime through strategic placement of C-H bonds in the molecular structure. This allows the fluids to be effective during use but break down harmlessly in the environment, replacing toxic persistent substances with temporary, benign ones.
Solution Approach 2:
The fluorinated vinyl ether compounds create an chemically inert heat transfer medium that does not react with system components or decompose into toxic substances. The C-F bonds provide chemical stability during operation, while controlled C-H bonds enable safe environmental degradation.
3Object-affected harmful factors
If hydrofluoroethers with low GWP are used, then environmental sustainability is improved, but dielectric properties and thermal performance deteriorate
Solution Approach 1:
The patent applies local quality by positioning fluorinated groups at specific locations in the molecular structure (Rf-O-CF2-O-CX=CYZ) to maintain dielectric properties in the regions critical for electrical insulation, while allowing low-GWP structural features in other regions. This localized optimization preserves electrical performance while achieving environmental goals.
Solution Approach 2:
The invention combines fluorinated alkyl chains (providing dielectric strength and chemical inertness) with vinyl ether functional groups (providing low GWP) in a composite molecular structure. This composite design integrates conflicting properties into a single molecule that exhibits both low GWP and excellent dielectric characteristics.
4Device complexity
If air cooling is used in server farms, then simplicity is maintained, but energy consumption and footprint increase
Solution Approach 1:
The patent transitions from pneumatic cooling (air) to hydraulic cooling (liquid heat transfer fluids). Liquid fluids provide superior heat capacity and thermal conductivity, enabling more efficient heat removal from server equipment. This hydraulic approach reduces the energy required for cooling while allowing denser equipment packaging.
5Reliability
If fluorinated liquids with high GWP are used, then excellent heat transfer and dielectric properties are achieved, but environmental sustainability worsens
Solution Approach 1:
The patent fundamentally changes the molecular parameters of fluorinated heat transfer fluids by introducing vinyl ether groups and optimizing fluorine-to-hydrogen ratios. These parameter changes reduce atmospheric lifetime and GWP by more than 90% compared to traditional fluorinated liquids, while maintaining the chemical inertness and dielectric properties necessary for reliable heat transfer performance.
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
These heat transfer fluids offer efficient heat transfer, are non-flammable, and have a very low GWP, typically below 30, making them suitable for a wide range of industrial applications, including thermal management of electronic computing equipment, batteries, and semiconductor devices, while ensuring environmental sustainability.
Implementation Method 1
Heat transfer fluids are used to transfer heat from one body to another, typically from a heat source to a heat sink
Implementation Method 2
The heat transfer fluid provides a thermal path between the heat source and the heat sink
Implementation Method 3
the fluids of the invention are dielectric fluids so that they are electrical insulators and can transfer heat to and from electrical and electronic equipment
Data Source
AI summary
The present invention relates to a method for exchanging heat with an object said method comprising using a heat transfer fluid wherein said heat transfer fluid comprises one or more chemical compounds having the general formula: Rf-O-CF2-O-CX=CYZ (I) wherein Rf can be any C2-C6 linear, branched or C5C6 cyclic saturated carbon chain which can be partially or fully fluorinated, and can comprise 0-5 Oxygen atoms which, when present, are all engaged in ether bonds, and wherein X, Y and Z can be independently selected from halogens or hydrogen, with the proviso that at least one of X, Y or Z is a halogen.