HFO-1132 Refrigerant Composition for High-Pressure Stability
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Solution Overview
Problem
The chemical instability of trans-1,2-difluoroethylene (HFO-1132) leads to disproportionation reactions, which are not effectively suppressed in existing refrigerant compositions, posing challenges for refrigeration cycles, especially at high pressures.
Innovation Solution
A refrigerant composition comprising trans-1,2-difluoroethylene (HFO-1132), difluoromethane (R32), and 2,3,3,3-tetrafluoro-1-propene (R1234yf) is used, with specific mass ratios that fall within defined ranges in a ternary composition diagram, effectively suppressing disproportionation reactions at a refrigerant pressure of 3.0 MPa.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HFO-1132(E) is used as a refrigerant component, then the refrigerant achieves low GWP and good refrigerating capacity, but disproportionation reactions occur at high pressure
Solution Approach 1:
R1234yf acts as an intermediary substance that suppresses the disproportionation reaction of HFO-1132(E). The specific composition range (0.1-10 mass% R1234yf with 90-99.9 mass% HFO-1132(E)) creates a chemical environment where R1234yf interferes with the reaction mechanism, preventing polymerization while maintaining the desired refrigeration performance and low GWP
2Stability of the object's composition
If existing refrigerant compositions are used, then chemical stability is maintained, but disproportionation reactions cannot be suppressed at high pressure
Solution Approach 1:
The invention changes the compositional parameters by introducing R1234yf at specific concentrations (0.1-10 mass%). This parameter change fundamentally alters the chemical behavior of the refrigerant mixture, enabling suppression of disproportionation reactions at high pressure (3.0 MPa) while maintaining other desirable properties like low GWP and adequate refrigerating capacity
Data Source
AI summary
The present disclosure aims to provide a novel refrigerant comprising HFO-1132(E). As a solution for the problem, the disclosure provides a composition comprising a refrigerant, the refrigerant comprising HFO-1132(E), R32, and