Composition for heat cycle system, and heat cycle system
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Solution Overview
Problem
The use of HFO-1123 and CF3I in heat cycle systems results in high heat cycle performance but increased temperature glide, making it challenging to maintain within a predetermined range, and there is a need for a working fluid that addresses global warming concerns and serves as an alternative to R410A, R407C, and R404A.
Innovation Solution
A composition for a heat cycle system comprising a mixed working fluid containing HFO-1123, CF3I, and at least one compound selected from HFC, HFO, and HC, with 2,3,3,3-tetrafluoropropene as the hydrofluoroolefin, and a specific mass percentage range to achieve low temperature glide and improved cycle performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If HFO-1123 and CF3I are used in combination to achieve high heat cycle performance, then heat cycle performance is improved, but temperature glide increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition ratios of HFO-1123 (10-40 mass%), CF3I (20-80 mass%), and 2,3,3,3-tetrafluoropropene (10-70 mass%). By adjusting these parameters within specific ranges, the working fluid achieves both high heat cycle performance and low temperature glide (7°C or less), resolving the contradiction between performance and temperature control.
Solution Approach 2:
The patent uses composite materials by creating a three-component working fluid mixture combining HFO-1123, CF3I, and 2,3,3,3-tetrafluoropropene. This composite composition leverages the high heat cycle performance of HFO-1123 while using 2,3,3,3-tetrafluoropropene to suppress temperature glide, achieving both benefits simultaneously.
2Object-affected harmful factors
If HFO-1123 is used as a working fluid, then global warming potential is reduced, but self-decomposition occurs at high temperature or high pressure
Solution Approach 1:
The patent uses CF3I as an intermediary substance that suppresses the self-decomposition of HFO-1123 at high temperatures and pressures. CF3I acts as a stabilizer that protects HFO-1123 from decomposing, allowing the working fluid to maintain both low global warming potential and high stability under operating conditions.
Solution Approach 2:
The patent applies local quality by assigning specific functional roles to each component: HFO-1123 provides low GWP and high heat cycle performance, CF3I provides stabilization against decomposition, and 2,3,3,3-tetrafluoropropene provides additional stability and controls temperature glide. Each component contributes its specific property to the overall system.
3Reliability
If CF3I content is increased to suppress self-decomposition, then stability is improved, but temperature glide increases
Solution Approach 1:
The patent resolves this contradiction by controlling the CF3I content within a specific range (20-80 mass%) and balancing it with 2,3,3,3-tetrafluoropropene (10-70 mass%). This parameter optimization ensures sufficient stability against self-decomposition while maintaining temperature glide at 7°C or less, preventing the temperature glide from becoming excessive.
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 solution provides a working fluid with low temperature glide, high cycle performance, and reduced global warming potential, making it a suitable alternative to R410A, R407C, and R404A, while ensuring safety and efficiency in heat cycle systems.
Implementation Method 1
HFO-1123 is known to undergo so-called self-decomposition with an ignition source at high temperature or under high pressure
Implementation Method 2
the carbon-carbon double bond is likely to be decomposed by OH radicals in the air
Data Source
Figure 1~2
AI summary
To provide a composition for a hat cycle system which comprises a working fluid containing 1,1,2-trifluoroethylene, having cycle performance sufficient as an alternative to R410A while suppressing influence over global warming, and a heat cycle system employing the composition. A composition for a heat cycle system, which comprises a working fluid for heat cycle containing 1,1,2-trifluoroethylene, CF3I and at least one compound selected from a hydrofluorocarbon, a hydrofluoroolefin other than 1,1,2-trifluoroethylene and a hydrocarbon, and having a temperature glide of at most 7°C, and a heat cycle system employing the composition for a heat cycle system.