Four-Component Refrigerant Composition for Low-GWP Air Conditioning
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Solution Overview
Problem
Current refrigerants like R410A have a high global warming potential (GWP), necessitating the development of low-GWP alternatives for air conditioning systems.
Innovation Solution
A mixed refrigerant composition comprising difluoromethane (R32), trans-1,2-difluoroethylene (HFO-1132(E)), 1,3,3,3-tetrafluoropropene (R1234ze), and 1,1-difluoroethylene (HFO-1132a), with specific mass percentage ratios within defined ranges in a ternary composition diagram, is proposed as a replacement for R410A.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If R410A is used as refrigerant, then refrigerating capacity is maintained, but global warming potential becomes high
Solution Approach 1:
The patent changes the chemical composition parameters of the refrigerant by replacing R410A (R32/R125 mixture) with a new mixture containing HFO-1132(E), R1234ze, and HFO-1132a. This parameter change achieves GWP of 500 or less while maintaining refrigerating capacity ratio of 85% or more compared to R410A, directly resolving the contradiction between reducing harmful environmental factors and maintaining productivity
Solution Approach 2:
The patent creates a composite refrigerant mixture combining multiple components (HFO-1132(E), R1234ze, HFO-1132a, and optionally R1234yf) in specific proportions. This composite approach achieves both low GWP (500 or less) and high refrigerating capacity (85% or more of R410A), simultaneously addressing environmental concerns and performance requirements
2Object-affected harmful factors
If R32 is used as refrigerant, then global warming potential is reduced, but refrigerating capacity becomes insufficient
Solution Approach 1:
The patent merges R32 with other refrigerant components (HFO-1132(E), R1234ze, HFO-1132a) in specific proportions to create a composite mixture. This combination maintains the low GWP advantage of R32 while compensating for its insufficient refrigerating capacity, achieving both low environmental impact (GWP≤500) and high performance (refrigerating capacity ratio≥85%)
Data Source
AI summary
An object is to provide a novel low-GWP mixed refrigerant. Provided is a composition comprising a refrigerant, the refrigerant comprising difluoromethane (R32), trans-1,2-difluoroethylene (HFO-1132(E)), 1,3,3,3-tetrafluoropropene (R1234ze), and 1,1-difluoroethylene (HFO-1132a).