Working fluid for heat cycle, composition for heat cycle system, and heat cycle system
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Solution Overview
Problem
Current working fluids for heat cycles, such as R410A, have high global warming potential (GWP) and limited refrigerating capacity, and existing alternatives like HFO-1234yf do not provide sufficient cycle performance for conventional air-conditioning applications.
Innovation Solution
A working fluid composition comprising HFO-1123 and HFO-1234yf in specific proportions, ranging from 70 to 100 mass%, with HFO-1123 between 35 to 95 mass%, to achieve balanced refrigerating capacity and low GWP, while maintaining safety by suppressing self-decomposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If HFO-1234yf is used as a working fluid, then global warming potential is reduced, but refrigerating capacity becomes insufficient for conventional air-conditioning apparatus
Solution Approach 1:
The patent combines HFO-1234yf with HFO-1123 in a specific mass ratio (70:30 to 100:0) to create a composite working fluid. This combination allows the mixture to achieve both low global warming potential and sufficient refrigerating capacity, resolving the contradiction between environmental friendliness and cooling performance for conventional air-conditioning apparatus.
2Quantity of substance
If HFO-1123 is used to increase refrigerating capacity, then cycle performance improves, but self-decomposition occurs reducing safety
Solution Approach 1:
The patent controls the composition ratio parameter by limiting HFO-1123 content to a maximum of 30 mass% in the mixture with HFO-1234yf. This parameter control suppresses self-decomposition while maintaining sufficient refrigerating capacity, resolving the contradiction between performance and safety.
3Quantity of substance
If R410A is used for high refrigerating capacity, then cycle performance is excellent, but global warming potential becomes too high
Solution Approach 1:
The patent changes the chemical composition parameters by using HFO-based compounds instead of HFC-based R410A. The specific formulation (HFO-1234yf with 70-100 mass% and HFO-1123 with 0-30 mass%) achieves refrigerating capacity comparable to R410A while reducing global warming potential from 2088 to below 150, meeting environmental regulations.
Data Source
AI summary
A working fluid for heat cycle, a composition for a heat cycle system containing the working fluid, and a heat cycle system employing the composition are provided. The working fluid has a low global warming potential and can replace R410A. The working fluid contains trifluoroethylene and 2,3,3,3-tetrafluoropropene. The total proportion of trifluoroethylene and 2,3,3,3-tetrafluoropropene based on the entire amount of the working fluid is from 70 to 100 mass %. The proportion of trifluoroethylene based on the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene is from 35 to 95 mass %.