Thermodynamic and Transport Properties of CF3SCF3 as Environmentally Friendly Alternative Insulation Medium for SF6
SF6 gas,widely used in electrical insulation equipment,poses a significant threat to climate safety due to its potent greenhouse effect.The novel eco-friendly gas CF3SCF3 has emerged as a promising alternative insulating gas to replace SF6.In view of this,this study comparatively evaluates the fundamental physical properties of CF3 SCF3,and based on the principles of Gibbs free energy minimization and Chapman-Enskog theory,investigates its thermodynamic and transport properties as an arc-extinguishing medium in electrical switchgear.The results indicate that CF3SCF3 exhibits superior energy dissipation capability and arc extinguishing characteristics compared to most eco-friendly gases,making it a promising candidate for switchgear applications.Changes in pressure affect the chemical reaction processes and inter-particle interaction strengths in CF3SCF3 plasma,thereby altering the densities of various particles in the system and impacting its thermophysical properties.Adding 25％CF3SCF3 to N2 gas can enhance its thermal dissipation parameter(product of mass density and specific heat capacity)by more than 2.5 times below 5 000 K.The physical characteristics of CF3SCF3-N2 mixtures are similar to those of CF3 SCF3,suggesting their potential as arc extinguishing media under high-pressure conditions.This study provides essential data for modeling and simulating the arc interruption process of CF3SCF3 eco-friendly gas,contributing significantly to further research on its arc extinguishing properties.
CF3SCF3SF6 alternative gasparticle compositionthermodynamic propertytransport coefficientarc plasma
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