Azeotropic Heat Transfer Composition for Stable Phase Ratios
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Solution Overview
Problem
Existing alternatives to chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) face challenges such as flammability, long atmospheric lifetime leading to global warming concerns, and instability in non-azeotropic mixtures used for coolants, cleaners, and heat transfer mediums, which affect ozone depletion and heat pump performance.
Innovation Solution
A composition of 1,1,1,3,3,3-hexafluoroisopropylmethylether and hexafluoroisopropanol exhibiting an azeotropic mixture-like behavior, maintaining consistent vapor and liquid phase ratios, is developed, which is non-flammable or low flammable, and has a low global warming potential, suitable for heat transfer compositions and cleaners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydrocarbons are used as alternatives to CFCs and HCFCs, then ozone depletion is prevented, but flammability increases causing safety concerns
Solution Approach 1:
The patent uses composite HFE materials combining fluorinated ether structures with specific functional groups to achieve both ozone safety and fire resistance simultaneously, creating a material that integrates the benefits of different chemical families
2Object-affected harmful factors
If HFCs are used as alternatives to CFCs and HCFCs, then ozone depletion is prevented, but global warming potential increases due to long atmospheric lifetime
Solution Approach 1:
The patent modifies molecular parameters of HFE compounds by adjusting fluorine content, carbon chain length, and functional group configuration to optimize atmospheric degradation rate while maintaining thermal performance, thereby reducing GWP
3Productivity
If non-azeotropic mixtures are used for heat transfer compositions, then required performance can be achieved through mixing HFEs with other compounds, but mixture ratio stability deteriorates during evaporation and leakage
Solution Approach 1:
The patent carefully selects and adjusts the composition parameters of HFE mixtures to achieve near-azeotropic behavior where vapor and liquid phases have substantially equal compositions, preventing ratio drift during phase change operations
Solution Approach 2:
The patent designs the heat transfer composition to exhibit controlled phase transition characteristics where the mixture maintains compositional stability during evaporation and condensation cycles, eliminating the need for concentration control systems
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 azeotropic mixture-like composition provides stable performance in heat transfer and cleaning applications with minimal environmental impact, improving heat pump efficiency and reducing global warming potential, while maintaining consistent mixture ratios across phases.
Implementation Method 1
a composition containing 1,1,1,3,3,3-hexafluoroisopropylmethylether and hexafluoroisopropanol exhibits an azeotropic mixture-like phenomenon of having substantially the same mixture ratio in a vapor phase portion and a liquid phase portion
Implementation Method 2
the present invention also relates to a heat transfer composition containing such an azeotropic mixture-like composition, and a high-temperature heat pump device and a heat transfer method using the same
Data Source
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AI summary
An azeotropic mixture-like composition containing 1,1,1,3,3,3-hexafluoroisopropylmethylether (HFE-356mmz) and hexafluoroisopropanol (HFIP) is provided. 1,1,1,3,3,3-hexafluoroisopropylmethylether may be contained at a ratio higher than or equal to 0.1 % by mass and lower than or equal to 99.9% by mass.