Three-Component HFO Refrigerant Composition for Low-GWP Cooling
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Solution Overview
Problem
R410A refrigerant has a high global warming potential (GWP) of 2088, and there is a need for a low-GWP alternative that maintains performance and safety characteristics.
Innovation Solution
A mixed refrigerant comprising trans-1,2-difluoroethylene (HFO-1132), trifluoroethylene (HFO-1123), and trans-1,3,3,3-tetrafluoropropene (R1234ze) is developed, with specific composition ranges to achieve low GWP, high refrigerating capacity, and low flammability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If R410A refrigerant is used, then refrigerating capacity and COP are maintained at high levels, but global warming potential becomes excessively high (GWP=2088)
Solution Approach 1:
The patent changes the chemical composition parameters of the refrigerant by replacing R410A (HFC-32/HFC-125 mixture) with a novel mixture containing HFO-1132(E), HFO-1123, and R1234ze(E). This parameter change reduces GWP from 2088 to below 150 while maintaining refrigerating capacity at 85% or more of R410A through optimized compositional ratios.
Solution Approach 2:
The patent creates a composite refrigerant mixture combining three different chemical compounds (HFO-1132(E), HFO-1123, and R1234ze(E)) in specific proportions. This composite approach achieves low GWP while maintaining desirable thermodynamic properties that single-component refrigerants cannot provide alone.
2Object-affected harmful factors
If R410A refrigerant is used, then refrigerating capacity and COP are maintained at high levels, but flammability safety becomes a concern
Solution Approach 1:
The patent changes the chemical composition to include HFO-1132(E) and HFO-1123 which have inherently lower flammability characteristics compared to HFC-32 in R410A. The compositional parameters are optimized to keep the refrigerant within safe flammability limits (ASHRAE Class 2L or lower) while maintaining COP at 92.5% or more of R410A.
3Object-affected harmful factors
If low-GWP refrigerant alternatives are developed, then global warming potential is reduced, but refrigerating capacity and COP may deteriorate
Solution Approach 1:
The patent systematically adjusts the compositional parameters of the three-component mixture to optimize thermodynamic performance. By carefully controlling the ratios of HFO-1132(E), HFO-1123, and R1234ze(E), the invention achieves both low GWP and stable performance with refrigerating capacity ≥85% and COP ≥92.5% of R410A.
Solution Approach 2:
The patent uses a three-component composite refrigerant system where each component contributes specific properties: HFO-1132(E) provides low GWP and acceptable flammability, HFO-1123 enhances refrigerating capacity, and R1234ze(E) adjusts the temperature-pressure characteristics. The synergistic combination ensures reliable and stable performance.
Data Source
AI summary
An object of the present invention is to provide a novel mixed refrigerant having a low GWP. To achieve the above object, the present invention provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and trans-1,3,3,3-tetrafluoropropene (R1234ze(E)).