1,1,1,4,4,4-Hexafluoro-2-butene Insulating Medium for High-Voltage Equipment
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Solution Overview
Problem
Current SF6-based electrical insulation and arc-extinguishing systems have high global warming potential, necessitating a replacement with a gas that maintains similar insulating and extinguishing properties but with lower environmental impact.
Innovation Solution
A device utilizing 1,1,1,4,4-hexafluoro-2-butene as the insulating and arc-extinguishing medium, which offers high dielectric strength, effective arc suppression, and low global warming potential, combined with optional additives like fluorinated ketones and hydrofluoroolefins to enhance performance and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SF6 is used as insulating and arc-extinguishing gas, then dielectric strength and arc extinguishing properties are improved, but global warming potential increases significantly
Solution Approach 1:
The patent changes the chemical composition parameters by replacing SF6 with hydrofluoroolefin compounds (specifically 1,1,1,4,4,4-hexafluoro-2-butene) that have fundamentally different environmental properties. The GWP is reduced from 23,900 to below 150, while maintaining the dielectric strength through careful selection of fluorinated hydrocarbon structure and molecular properties.
Solution Approach 2:
The patent employs a gas with short atmospheric lifetime (rapid decomposition) compared to SF6's 3,200 year lifetime. The hydrofluoroolefin decomposes quickly in the atmosphere, effectively making it a short-living substitute that does not accumulate and cause long-term environmental harm while providing the same functional benefits.
2Object-affected harmful factors
If air-insulated systems are used instead of SF6, then global warming potential is reduced, but construction volume increases due to lower dielectric strength
Solution Approach 1:
The patent changes the physical and chemical parameters of the insulating medium by using fluorinated hydrocarbons with high dielectric strength. The molecular structure with multiple fluorine atoms provides electron affinity and polarization properties that maintain high dielectric strength, allowing compact design similar to SF6 systems while having minimal environmental impact.
3Object-affected harmful factors
If solid insulation is used, then SF6 replacement is achieved, but aging and partial discharge damage become critical issues
Solution Approach 1:
The patent uses a gaseous insulating medium (hydrofluoroolefin) instead of solid insulation, exploiting the properties of gas to provide electrical insulation. The gas can be easily replaced and does not suffer from aging, cracking, or partial discharge damage that plagues solid insulation materials, thereby maintaining system reliability while achieving 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 solution provides a more environmentally friendly alternative with improved dielectric strength, effective arc suppression, and reduced greenhouse gas emissions, suitable for high-voltage applications while maintaining reliability and safety.
Implementation Method 1
1,1,1,4,4,4-hexafluoro-2-butene has a high dielectric strength... the inventors assume that as the number of fluorine atoms in a hydrocarbon increases, its dielectric strength also increases
Implementation Method 2
These fluorine atoms are bonded to the terminal methyl groups and can accordingly prevent the onset of gas discharges, which form a precursor to dielectric breakdown, through dissociative attachment
Data Source
AI summary
The invention relates to a device comprising at least one electric arrangement which has an electric voltage of 1 kV or more in an operating state of the device and/or comprising at least one particle acceleration arrangement. The arrangement is at least partly arranged in a housing which contains an electrically insulating and/or arc-extinguishing gaseous medium, said medium consisting of 1,1,1,4,4,4-hexafluoro-2-butene or containing 1,1,1,4,4,4-hexafluoro-2-butene. The invention also relates to a method for using 1,1,1,4,4,4-hexafluoro-2-butene as an electrically insulating and/or arc-extinguishing gaseous medium.