Low-GWP Refrigerant Composition Using HFO-1132(E) and R32 Blend
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Solution Overview
Problem
Existing refrigerants like R410A have high global warming potential (GWP) and there is a need for a low-GWP alternative.
Innovation Solution
A refrigerant composition comprising 25-27% trans-1,2-difluoroethylene (HFO-1132(E)) and 73-75% difluoromethane (R32) with a total of ≥ 99.5% mass, offering a low GWP and suitable for use in refrigerating machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If R410A is used as refrigerant, then refrigerating capacity and COP are maintained, but global warming potential increases significantly
Solution Approach 1:
The patent changes the chemical composition parameters of the refrigerant by using HFO-1132(E) instead of conventional HFC components. This substitution fundamentally alters the molecular structure and thermodynamic properties, achieving low GWP (≤500) while maintaining refrigerating capacity (≥100% relative to R410A) and COP (≥100% relative to R410A) through optimized composition ratios of 25-27 mass% HFO-1132(E) and 73-75 mass% R32
Solution Approach 2:
The patent creates a composite refrigerant system by combining HFO-1132(E) and R32 in specific proportions. This composite approach leverages the complementary properties of both components: HFO-1132(E) provides low GWP and appropriate thermodynamic characteristics, while R32 enhances refrigerating capacity and efficiency, achieving a balance that neither component could achieve alone
2Object-affected harmful factors
If HFO-1132(E) content is increased to reduce GWP, then environmental performance improves, but refrigerating capacity may decrease
Solution Approach 1:
The patent optimizes the concentration parameter of HFO-1132(E) within the specific range of 25-27 mass% to achieve the desired balance. This precise parameter control ensures that the refrigerant mixture maintains sufficient refrigerating capacity (≥100% relative to R410A) while achieving low GWP (≤500), demonstrating that exact compositional parameters are critical for resolving the contradiction between environmental performance and refrigerating capacity
3Object-affected harmful factors
If refrigerant composition is optimized for low GWP, then environmental impact reduces, but system compatibility and operation reliability may be affected
Solution Approach 1:
The patent adjusts multiple parameters including composition ratios (25-27 mass% HFO-1132(E), 73-75 mass% R32), purity (≥99.5 mass%), and thermodynamic properties to ensure system compatibility. These parameter optimizations maintain reliable operation in conventional refrigeration systems while achieving low GWP (≤500), proving that comprehensive parameter control ensures both environmental performance and system reliability
Data Source
Figure 1
AI summary
An object is to provide a novel low-GWP mixed refrigerant. Provided as a means for a solution is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)) and difluoromethane (R32), wherein HFO-1132 (E) is present in an amount of 25 to 27 mass% based on the total of HFO-1132(E) and R32, and R32 is present in an amount of 73 to 75 mass% based on the total of HFO-1132(E) and R32.