HFO-1123 Working Medium for Low-GWP Heat Cycle Performance
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Solution Overview
Problem
Current working mediums for heat cycles, such as hydrofluorocarbons (HFCs), pose ozone layer and global warming concerns, and alternative hydrofluoroolefins (HFOs) are insufficient in cycle performance and combustibility.
Innovation Solution
A working medium comprising 1,1,2-trifluoroethylene (HFO-1123) with optional hydrocarbons, HFCs, or hydrochlorofluoroolefins, which enhances cycle performance and safety by suppressing combustibility and reducing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If HFCs are used as working medium, then ozone layer protection is improved, but global warming potential increases
Solution Approach 1:
The patent changes the chemical composition parameters by introducing HFO-1123 with specific molecular structure (1,1,2-trifluoroethylene) that has both low ozone depletion potential and low global warming potential, resolving the contradiction between ozone protection and climate impact
Solution Approach 2:
The patent creates a composite working medium by combining HFO-1123 with other fluorinated compounds in specific proportions, achieving optimal balance between environmental protection and thermodynamic performance
2Object-generated harmful factors
If HFOs are used as working medium, then global warming potential is reduced, but cycle performance decreases
Solution Approach 1:
The patent optimizes the molecular parameters of HFO-1123 and adjusts composition ratios to enhance heat transfer coefficients and thermodynamic efficiency, thereby improving cycle performance while maintaining low global warming potential
3Object-generated harmful factors
If HFOs with low fluorine proportion are used, then global warming potential is reduced, but combustibility increases
Solution Approach 1:
The patent formulates a composite mixture where HFO-1123 is combined with other fluorinated compounds in specific proportions that suppress combustibility while maintaining low global warming potential, achieving both safety and environmental goals
4Object-generated harmful factors
If carbon dioxide is used as coolant, then global warming potential is reduced, but equipment pressure increases
Solution Approach 1:
The patent selects HFO-1123 with optimized thermodynamic parameters that provide operating pressures comparable to conventional HFCs, avoiding the extreme pressure issues of CO2 while maintaining environmental benefits
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 HFO-1123-based medium offers improved cycle performance, safety, and reduced environmental impact, enabling system downsizing while effectively addressing ozone layer and global warming concerns.
Implementation Method 1
a hydrofluoroolefin (HFO) having a carbon-carbon double bond which is easily decomposed by OH radicals in the air
Data Source
AI summary
To provide a working medium for heat cycle, of which combustibility is suppressed, which has less influence over the ozone layer, which has less influence over global warming and which provides a heat cycle system excellent in the cycle performance (capacity), and a heat cycle system, of which the safety is secured, and which is excellent in the cycle performance (capacity). A working medium for heat cycle comprising 1,1,2-trifluoroethylene is employed for a heat cycle system (such as a Rankine cycle system, a heat pump cycle system, a refrigerating cycle system or a heat transport system).