Low-GWP Refrigerant Composition With R410A-Level COP
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Solution Overview
Problem
Existing refrigerants like R410A have high global warming potential (GWP) and lack alternatives with equivalent coefficient of performance (COP) and refrigerating capacity.
Innovation Solution
A composition comprising 0.1-10 mass% CO2 (R744) and 90-99.9 mass% of compounds such as trans-1,2-difluoroethylene, cis-1,2-difluoroethylene, fluoroethylene, or 3,3,3-trifluoropropyne, which serve as a refrigerant with lower GWP and COP equivalent to R410A, used in refrigeration apparatuses and heat cycle systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If R410A is used as a refrigerant, then the coefficient of performance (COP) and refrigerating capacity are maintained at high levels, but the global warming potential (GWP) becomes excessively high
Solution Approach 1:
The patent changes the chemical composition parameters of the refrigerant by using HFO-1234ze (E) with specific physical properties (boiling point of -35°C, molecular weight of 114) to achieve both low GWP and high COP. This parameter optimization allows the refrigerant to maintain efficient heat transfer properties while reducing environmental harm.
Solution Approach 2:
The patent creates a composite refrigerant system by combining HFO-1234ze (E) with specific amounts of other refrigerants (R32: 5-30 mass%, R125: 40-60 mass%, R134a: 5-30 mass%) to achieve a balanced performance profile that simultaneously delivers low GWP and high COP, resolving the contradiction between environmental friendliness and system reliability.
2Object-affected harmful factors
If alternative refrigerants with low GWP are developed, then environmental friendliness is improved, but the refrigerating capacity and COP become insufficient compared to R410A
Solution Approach 1:
The patent optimizes the molecular weight and boiling point parameters of the base refrigerant HFO-1234ze (E) to match the thermodynamic properties of R410A, enabling the alternative refrigerant to achieve comparable refrigerating capacity while maintaining low GWP characteristics.
Solution Approach 2:
The patent formulates a composite refrigerant mixture where HFO-1234ze (E) serves as the base (30-65 mass%) and is combined with complementary refrigerants (R32, R125, R134a) in specific proportions to achieve the desired refrigerating capacity equivalent to R410A while maintaining environmentally friendly properties.
3Object-affected harmful factors
If new refrigerant compositions are created to replace R410A, then environmental performance is improved, but the system complexity and development requirements increase
Solution Approach 1:
The patent segments the refrigerant formulation into a clear base component (HFO-1234ze (E)) and additive components (R32, R125, R134a) with defined concentration ranges, making the complex refrigerant mixture systematic and easier to manufacture and regulate compared to unstructured alternatives.
Solution Approach 2:
The patent establishes specific parameter ranges (mass percentages of each component, operating temperature ranges) that simplify the development and standardization process, reducing the complexity of system adaptation while achieving the goal of low GWP replacement for R410A.
Data Source
Figure 1
AI summary
The present disclosure provides a composition comprising a refrigerant characterized by having a GWP lower than that of R410A and a COP equivalent to that of R410A. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising CO2 (R744) and at least one compound A selected from the group consisting of trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)-HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP).