Composition containing refrigerant, refrigeration method using said composition, method for operating refrigeration device, and refrigeration device
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Solution Overview
Problem
Current refrigerants, such as R404A, have high global warming potential (GWP) and flammability, necessitating the development of environmentally friendly alternatives with equivalent or superior refrigerating capacity and coefficient of performance (COP).
Innovation Solution
A refrigerant composition comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (HFC-32), and 2,3,3-tetrafluoropropene (HFO-1234yf) in specific mass ratios, totaling 99.5% or more, which provides a low GWP, high refrigerating capacity, and improved COP while maintaining low flammability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If R404A refrigerant is used, then refrigerating capacity and COP are maintained, but GWP is high (environmental harm)
Solution Approach 1:
The patent uses a composite refrigerant mixture containing HFO-1132(E), HFC-32, and HFO-1234yf in specific proportions. This composite composition achieves low GWP (125 or less) while maintaining refrigerating capacity and COP equivalent to or higher than R404A, resolving the contradiction between environmental friendliness and performance reliability.
Solution Approach 2:
The patent changes the compositional parameters of the refrigerant by using specific mass ratios of HFO-1132(E) (1.0-50.0 mass%), HFC-32 (0.1-30.0 mass%), and HFO-1234yf (45.0-60.0 mass%). By optimizing these parameters, the refrigerant achieves both low GWP and high refrigerating capacity with COP of 100% or more relative to R404A.
2Object-affected harmful factors
If alternative refrigerants with low GWP are used, then environmental impact is reduced, but refrigerating capacity and COP may be insufficient
Solution Approach 1:
The patent employs a composite refrigerant system combining HFO-1132(E), HFC-32, and HFO-1234yf. This composite approach achieves GWP of 125 or less while delivering refrigerating capacity at 95% or more of R404A levels, simultaneously reducing environmental impact and maintaining productivity.
Solution Approach 2:
The patent optimizes compositional parameters with HFO-1132(E) at 1.0-50.0 mass%, HFC-32 at 0.1-30.0 mass%, and HFO-1234yf at 45.0-60.0 mass%. This parameter optimization ensures both low environmental impact (GWP ≤125) and high refrigerating capacity (≥95% of R404A).
3Object-affected harmful factors
If refrigerant composition is optimized for low GWP, then flammability may increase, but safety is compromised
Solution Approach 1:
The patent uses a composite refrigerant mixture of HFO-1132(E), HFC-32, and HFO-1234yf where the synergistic combination achieves GWP of 125 or less while maintaining burning velocity at 5.0 cm/s or less. The specific composite formulation balances environmental performance with safety by suppressing flammability through the integrated composition.
Solution Approach 2:
The patent changes compositional parameters to achieve GWP ≤125 with controlled flammability. By setting HFO-1132(E) at 1.0-50.0 mass%, HFC-32 at 0.1-30.0 mass%, and HFO-1234yf at 45.0-60.0 mass%, the refrigerant achieves both low GWP and acceptable burning velocity (≤5.0 cm/s).
Data Source
AI summary
The present disclosure provides a composition comprising a refrigerant that has characteristics of having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. More specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (HFC-32), and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein the total concentration of the three components is 99.5% by mass or more, based on the entire refrigerant, and three components have a mass ratio that falls within a region surrounded by a figure passing through the following 4 points in a ternary composition diagram whose three vertices represent the three components:point A (HFO-1132(E)/HFC-32/HFO-1234yf=51.8/1.0/47.2 mass %),point B (HFO-1132(E)/HFC-32/HFO-1234yf=35.3/1.0/63.7 mass %),point C (HFO-1132(E)/HFC-32/HFO-1234yf=10.1/18.0/71.9 mass %), andpoint D (HFO-1132(E)/HFC-32/HFO-1234yf=27.8/18.0/54.2 mass %).