Composition containing coolant, heat transfer medium and heat cycle system
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Solution Overview
Problem
Existing refrigerants like R410A have a high global warming potential (GWP) and lack alternatives with equivalent coefficient of performance (COP) and refrigerating capacity.
Innovation Solution
A composition comprising CO2 (R744) and specific fluoroolefins such as trans-1,2-difluoroethylene, cis-1,2-difluoroethylene, fluoroethylene, and 3,3,3-trifluoropropyne, optionally combined with other compounds like tetrafluoromethane and difluoromethane, to create a refrigerant with a lower GWP and COP equivalent to R410A.
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 acceptable 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 CO2 (R744) as the base refrigerant instead of conventional HFCs like R410A. This fundamental parameter change achieves dramatically lower GWP (CO2 has GWP of 1 compared to R410A's GWP of 2088) while the system is designed to maintain equivalent COP through optimized heat exchanger configurations and operating parameters
Solution Approach 2:
The patent creates a composite refrigerant system by combining CO2 with specific lubricants and additives. The refrigerant composition includes CO2 as the primary component along with carefully selected auxiliary substances that enhance compatibility and performance, achieving both environmental goals and operational reliability
2Object-affected harmful factors
If a refrigerant with lower GWP than R410A is developed, then environmental friendliness is improved, but equivalent COP and refrigerating capacity to R410A are not achieved
Solution Approach 1:
The patent optimizes operating parameters including pressure, temperature, and flow rates specifically for CO2-based systems. By adjusting these parameters and redesigning the heat cycle system components, the system achieves refrigerating capacity equivalent to R410A while maintaining the environmental advantage of lower GWP
Solution Approach 2:
The patent applies local quality optimization by designing specific heat exchanger structures and configurations tailored for CO2 refrigerant properties. The heat cycle system incorporates localized design modifications in evaporators, condensers, and expansion devices to maximize heat transfer efficiency and achieve target refrigerating capacity
Data Source
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).