Ternary Refrigerant Blend for Low-GWP R-134a Replacement
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Solution Overview
Problem
Current refrigerants like R-410A and R-134a have high Global Warming Potential (GWP) and ozone depletion potential, necessitating the search for alternatives that are environmentally friendly and efficient in refrigeration and air conditioning systems.
Innovation Solution
Ternary compositions of 2,3,3-tetrafluoropropene, 1,1-difluoroethane, and difluoromethane are used as heat transfer fluids, offering zero ODP and GWP below existing fluids, with improved performance and compatibility with existing compressor technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If HFC-134a is used as refrigerant, then ozone depletion is reduced, but global warming potential increases
Solution Approach 1:
The patent changes the chemical composition parameters by using a ternary mixture of HFO-1234yf, HFC-32, and HFC-152a instead of conventional HFC-134a, achieving both low GWP and acceptable refrigeration performance through optimized compositional parameters
2Object-generated harmful factors
If carbon dioxide is used as refrigerant, then global warming potential is reduced, but pressure requirements increase
Solution Approach 1:
The patent creates a composite refrigerant system by combining three different compounds (HFO-1234yf, HFC-32, and HFC-152a) in specific proportions, achieving a balance between environmental performance and operational pressure characteristics that neither pure substance could achieve alone
3Productivity
If R-410A is used as refrigerant, then cooling performance is improved, but global warming potential increases
Solution Approach 1:
The patent optimizes the compositional parameters of the ternary mixture to achieve cooling performance comparable to R-410A while maintaining GWP below 150, specifically by adjusting the ratios of HFO-1234yf, HFC-32, and HFC-152a to balance thermodynamic properties with environmental constraints
Data Source
AI summary
A heat transfer method using ternary composition containing 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane and difluoromethane, as a heat transfer fluid in refrigeration systems, to replace R-134a. 1. A method of modifying a heat transfer system containing R-134a comprising removing R-134a and adding a composition comprising a refrigerant consisting essentially of: 70 to 88 wt % of 2,3,3,3-tetrafluoropropene; 4 to 16 wt % of difluoromethane; 8 to 14 wt % of 1,1-difluoroethane; and optionally, a stabilizer.