Composition containing cis-1,2-difluoroethylene
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Solution Overview
Problem
Current compositions for refrigeration, air-conditioning, and heat pump systems using cis-1,2-difluoroethylene do not offer sufficient alternatives with reduced global warming potential (GWP) and equivalent or higher coefficient of performance (COP) and refrigerating capacity compared to conventional refrigerants.
Innovation Solution
A composition comprising cis-1,2-difluoroethylene (HFO-1132(Z)) combined with specific additional compounds such as 1-chloro-1,1,2-trifluoroethane, 1,1-difluoroethane, and others, in amounts up to 10 mass % or less, forming an azeotropic or azeotrope-like mixture, which can serve as a heat transfer medium, foaming agent, or propellant with reduced GWP and maintained or improved refrigerating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional refrigerants are used, then refrigerating capacity and COP are maintained at acceptable levels, but global warming potential is high
Solution Approach 1:
The patent changes the chemical composition parameters by using cis-1,2-difluoroethylene as the primary component (90-99.9 mass%) and carefully controlling the content of additional compounds (0.1-10 mass%), thereby achieving low GWP while maintaining acceptable refrigerating capacity and COP through optimized compositional parameters
Solution Approach 2:
The patent creates a composite refrigerant composition by combining cis-1,2-difluoroethylene with specific additional compounds (such as HFO-1132a, HFO-1123, HFC-134a, or HFC-125) in controlled proportions, where the synergistic interaction between components achieves both low environmental impact and adequate refrigeration performance
2Object-affected harmful factors
If cis-1,2-difluoroethylene is used as primary component, then GWP is reduced, but refrigerating capacity and COP may be insufficient
Solution Approach 1:
The patent optimizes the concentration parameter of additional compounds within 0.1-10 mass% ranges to enhance COP and refrigerating capacity while maintaining the low GWP benefit of cis-1,2-difluoroethylene as the base component
Solution Approach 2:
The patent formulates composite compositions where cis-1,2-difluoroethylene is combined with performance-enhancing additional compounds, creating a synergistic mixture that achieves both environmental compatibility and reliable refrigeration performance
Data Source
AI summary
The invention provides a novel composition comprising cis-1,2-difluoroethylene. The invention provides the following: a composition comprising cis-1,2-difluoroethylene (HFO-1132(Z)) and at least one additional compound; the composition that is an azeotropic or azeotrope-like composition; and use of the composition as a heat transfer medium, a foaming agent, or a propellant.