Thermodynamic, transport, and radiation properties of HFO-1336mzz(E) mixtures as eco-friendly SF₆ alternatives

HFO-1336mzz(E) is proposed as a novel alternative to SF₆ due to its low greenhouse effect and high insulation strength. Typically, it is mixed with CO₂ or Air to lower its boiling point to meet the minimum operating temperature. To better understand the thermophysical properties of the gases’ arcing plasma, the composition, thermodynamic properties, transport properties, and net emission coefficient of 30% molar fraction of HFO-1336mzz(E) mixed with CO₂ or Air at temperatures from 300 K to 30 000 K at 0.12 MPa are calculated. It is found that HFO-1336mzz(E) mixtures have similar turbulent energy dissipation and thermal interruption capability to the pure SF₆. Analysis of radiation characteristics demonstrates that the HFO-1336mzz(E) mixtures at 0.12 MPa exhibit stronger radiation emission compared to SF₆ at 0.1 MPa, which indicates good arc radiation dissipation capabilities within such mixtures. This study reports the properties of thermal plasma of HFO-1336mzz(E) mixtures for the first time. These findings not only provide fundamental data for further magneto-hydro-dynamic calculations for arcing process but also put forward the potential application of these mixtures as arc interruption medium in medium voltage switchgears.