Ternary HFO Refrigerant Composition for Low GWP and High COP

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Solution Overview

Problem

Current refrigerants like R410A have high global warming potential (GWP) and there is a need for alternatives with equivalent refrigerating capacity and coefficient of performance (COP) while having a low GWP.

Innovation Solution

A refrigerant composition comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf) within specific mass percentage ranges in a ternary composition diagram, which provides a refrigerating capacity and COP equivalent to R410A while having a significantly lower GWP.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If R410A is used as refrigerant, then refrigerating capacity and COP are maintained at high levels, but global warming potential becomes excessively high

Engineering Contradiction:

Improveglobal warming potentialVSAvoidrefrigerating capacity and COP

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters of the refrigerant by using HFO-1132(E) with specific mass percentages (5-70%) combined with HFO-1123 (5-80%) and R1234yf (5-40%), achieving both low GWP and high refrigerating capacity/COP performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite refrigerant mixture combining three different HFO and HFC compounds (HFO-1132(E), HFO-1123, and R1234yf) in specific proportions to achieve synergistic effects that simultaneously provide low GWP and high refrigeration performance

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If R32 is used to reduce GWP, then global warming potential decreases, but refrigerating capacity and COP may not be equivalent to R410A

Engineering Contradiction:

Improveglobal warming potentialVSAvoidrefrigerating capacity and COP equivalence

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent merges multiple refrigerant compounds (HFO-1132(E), HFO-1123, and R1234yf) into a single composite refrigerant system, combining their individual advantages to achieve both low GWP and high refrigeration performance equivalent to R410A

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If alternative low-GWP refrigerants are used, then environmental impact is reduced, but flammability and safety characteristics may be compromised

Engineering Contradiction:

Improveglobal warming potentialVSAvoidflammability and safety

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent optimizes the local composition quality by precisely controlling the mass percentage ranges of each component (HFO-1132(E): 5-70%, HFO-1123: 5-80%, R1234yf: 5-40%), ensuring that the specific local composition provides both low GWP and improved safety characteristics with lower flammability

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11365335B2Composition comprising refrigerant, use thereof, refrigerating machine having same, and method for operating said refrigerating machine

Publication Date: 2022.06.21 DAIKIN INDUSTRIES LTD

AI summary

An object of the present invention is to provide a mixed refrigerant having three types of performance; i.e., a refrigerating capacity (also referred to as cooling capacity) and a coefficient of performance (COP) that are equivalent to those of R410A, and a sufficiently low GWP. Provided as a means for achieving the object is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf).