Multicomponent Refrigerant Mixture for Low GWP Retrofit
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Solution Overview
Problem
There is a need for refrigerants with low or zero global warming potential, non-flammability, and non-toxicity to replace high global warming HFCs like HFC-404A in refrigeration systems, especially in low and medium temperature applications, while maintaining efficiency and compatibility with existing vapor compression technology.
Innovation Solution
A multicomponent mixture comprising 26% HFC-32, 26% HFC-125, 21% HFC-134a, 20% HFO-1234yf, and 7% HFO-1234ze, which provides a non-flammable and non-toxic refrigerant with lower global warming potential, suitable for retrofitting existing systems without significant engineering modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If HFC-404A is used as refrigerant, then cooling capacity and efficiency are maintained, but global warming potential becomes excessively high
Solution Approach 1:
The patent applies composite materials principle by creating a refrigerant mixture comprising multiple HFC components (HFC-134a, HFC-125, HFC-143a) in specific proportions. This composite refrigerant composition achieves lower global warming potential compared to HFC-404A while maintaining the required cooling capacity and efficiency through the synergistic effect of its components.
Solution Approach 2:
The patent applies parameter changes principle by modifying the compositional parameters of the refrigerant mixture. By adjusting the weight percentages of individual HFC components (HFC-134a: 10-50%, HFC-125: 20-60%, HFC-143a: 10-50%), the invention optimizes the balance between environmental performance (lower GWP) and thermodynamic performance (cooling capacity and efficiency).
2Object-affected harmful factors
If new refrigerant compositions are developed to reduce global warming potential, then environmental performance improves, but compatibility with existing vapor compression technology may be compromised
Solution Approach 1:
The patent applies universality principle by designing a refrigerant composition that serves multiple functions: it provides effective cooling, maintains compatibility with existing vapor compression systems and lubricants, and delivers reduced global warming potential. This multi-functional refrigerant can be used across different applications without requiring major system modifications.
Solution Approach 2:
The patent applies intermediary principle by selecting HFC components that act as intermediaries between the requirements for low GWP and system compatibility. These HFC components have properties that bridge the gap between environmental performance and technical compatibility, enabling the refrigerant mixture to work effectively in existing systems while meeting environmental goals.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition achieves a substantial reduction in global warming potential, maintains cooling capacity and efficiency comparable to HFC-404A, and can be used as a drop-in replacement in both low and medium temperature refrigeration systems, offering improved environmental performance and energy efficiency.
Implementation Method 1
Mechanical refrigeration systems, and related heat transfer devices such as heat pumps and air conditioners, using refrigerant liquids are well known in the art
Implementation Method 2
Heat transfer compositions and methods
Implementation Method 3
Mechanical refrigeration systems, and related heat transfer devices such as heat pumps and air conditioners
Data Source
AI summary
Compositions, methods and systems which comprise or utilize a multi-component mixture comprising: (a) HFC-32; (b) HFC-125; (c) HFO-1234yf and/or HFO-1234ze; (d) HFC-134a. In certain non-limiting aspects, such refrigerants may be used as a replacement for R-404A.