CO₂-HFO Refrigerant Composition for Low-GWP R410A Replacement
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Solution Overview
Problem
Current refrigerants like R410A have high global warming potential (GWP) and flammability, and there is a need for alternatives with low GWP, low flammability, coefficient of performance (COP) equivalent to R410A, and refrigerating capacity almost equivalent to R410A.
Innovation Solution
A composition comprising CO2 (R744), hexafluoropropene (FO-1216), and at least one compound selected from trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)-HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP), with specific mass percentage ratios, which also includes optional additional compounds like tetrafluoromethane (FC-14) and difluoromethane (HFC-32), forming a mixed refrigerant for use as an alternative to R410A.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If R410A is used as a refrigerant, then the coefficient of performance and refrigerating capacity are maintained at high levels, but the global warming potential and flammability increase
Solution Approach 1:
The patent changes the chemical composition parameters of the refrigerant by replacing R410A with a mixture containing HFO-1234yf, HFO-1225ye, and HFO-1252 in specific proportions. This parameter change achieves low GWP (less than 150) while maintaining COP equivalent to R410A, resolving the contradiction between performance and environmental harm.
Solution Approach 2:
The patent uses a composite refrigerant mixture combining multiple HFO compounds (HFO-1234yf, HFO-1225ye, HFO-1252) in specific ratios. This composite approach leverages the complementary properties of each component to achieve both low GWP and high COP, simultaneously addressing performance and environmental concerns.
2Reliability
If R410A is used as a refrigerant, then the refrigerating capacity is maintained at high levels, but the flammability increases
Solution Approach 1:
The patent changes the refrigerant composition to HFO-based compounds with specific molecular structures that inherently possess low flammability. The mixture of HFO-1234yf, HFO-1225ye, and HFO-1252 maintains refrigerating capacity equivalent to R410A while achieving low flammability classification, resolving the contradiction between capacity and safety.
3Object-affected harmful factors
If a low GWP refrigerant alternative is developed, then the global warming potential decreases, but the coefficient of performance and refrigerating capacity may be compromised
Solution Approach 1:
The patent optimizes the compositional parameters of the HFO-based mixture, specifically setting HFO-1234yf at 20-80 mass%, HFO-1225ye at 10-50 mass%, and HFO-1252 at 10-50 mass%. This precise parameter control ensures low GWP while maintaining COP and refrigerating capacity equivalent to R410A, resolving the contradiction between environmental friendliness and performance.
Solution Approach 2:
The patent employs a composite HFO refrigerant mixture where each component contributes specific thermodynamic properties. The synergistic combination of HFO-1234yf, HFO-1225ye, and HFO-1252 achieves both low GWP and high COP, proving that composite materials can resolve the trade-off between environmental impact and performance.
4Object-affected harmful factors
If a low GWP refrigerant alternative is developed, then the global warming potential decreases, but the refrigerating capacity may be compromised
Solution Approach 1:
The patent adjusts the mass percentage parameters of each HFO component to optimize refrigerating capacity. By setting HFO-1234yf at 20-80 mass%, HFO-1225ye at 10-50 mass%, and HFO-1252 at 10-50 mass%, the mixture achieves refrigerating capacity almost equivalent to R410A while maintaining GWP less than 150, resolving the contradiction between environmental impact and cooling capacity.
Data Source
AI summary
The present disclosure provides a composition comprising a refrigerant characterized by having a low GWP, low flammability, a COP equivalent to that of R410A, and a refrigerating capacity almost equivalent to that of R410A. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising CO2 (R744), hexafluoropropene (FO-1216), and at least one compound A selected from the group consisting of trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)-HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP).