Low-Temperature Heat Transfer Fluid Composition With Low GWP
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Solution Overview
Problem
Current heat transfer fluids, such as perfluorocarbons, have high global warming potential and are not suitable for ultra-low temperature refrigeration applications due to reduced heat transfer characteristics and fluid loss issues at low temperatures.
Innovation Solution
Compositions comprising alkyl perfluoroalkene ethers and hydrofluoroethers are developed, which maintain low viscosity and effective heat transfer properties across a wide temperature range, including ultra-low temperatures, reducing environmental impact and fluid loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perfluorocarbons are used as heat transfer fluids, then good safety and health attributes and dielectric properties are achieved, but high global warming potential and long atmospheric lifetime result
Solution Approach 1:
The patent modifies the molecular structure of perfluorocarbons by introducing hydrofluoroether components with different fluorine content and chain lengths, changing the physical and chemical parameters to reduce GWP while maintaining safety and dielectric properties
Solution Approach 2:
The invention creates composite heat transfer fluid compositions by combining multiple hydrofluoroether compounds in specific ratios, achieving a balance between safety, dielectric performance, and reduced environmental impact that cannot be obtained with single components
2Temperature
If conventional heat transfer fluids are used in ultra-low temperature refrigeration, then operating temperature range is limited, but heat transfer characteristics deteriorate and fluid loss increases at low temperatures
Solution Approach 1:
The patent selects hydrofluoroether compounds with specific boiling points, viscosities, and vapor pressures that remain stable across ultra-low temperature ranges, changing the physical parameters to prevent fluid loss and maintain heat transfer efficiency at temperatures below -40°C
Solution Approach 2:
The invention optimizes the molecular structure of individual components within the mixture to exhibit specific properties at different temperature zones, ensuring that each component contributes to maintaining fluidity and heat transfer characteristics in the ultra-low temperature environment
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 compositions provide efficient heat transfer and maintain fluidity at extreme temperatures, enhancing the performance of refrigeration systems while minimizing environmental impact by reducing global warming potential.
Implementation Method 1
condensing a composition provided herein, and thereafter evaporating said composition
Implementation Method 2
condensing a composition provided herein, and thereafter evaporating said composition
Implementation Method 3
a working fluid that removes heat from, adds heat to, or maintains temperature of the vicinity of a body to be cooled or heated
Data Source
AI summary
The present application relates to compositions (e.g., heat transfer fluids) for use in refrigeration and heat transfer applications. The compositions of the present invention are useful in methods for producing cooling and heating, and methods for replacing refrigerants and refrigeration, air conditioning, and heat pump apparatuses.