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

Abstract

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 30000 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 (MHD) calculations for arcing process but also put forward the potential application of these mixtures as arc interruption medium in medium voltage switchgears.

Kinetic and Experimental Investigations on the Unimolecular Thermal Decomposition of an Eco-friendly Insulating Gas HFO-1336mzz(E)

“…10 They also calculated the thermodynamic properties, transport coefficients, and radiation properties of HFO-1336mzz(E) mixtures. 13 Research has shown that the arc quenching capability of 30% HFO-1336mzz(E)/air mixtures can reach 96% that of SF 6 . 14 Existing research has shown that the new eco-friendly gas HFO-1336mzz(E) has great potential for highvoltage applications.…”

“…Zhang et al conducted a breakdown test on the HFO-1336mzz­(E) mixtures and found that the insulation strength of 30% HFO-1336mzz­(E)/CO 2 and 30% HFO1336mzz­(E)/air at 0.12 MPa was equivalent to that of SF 6 at 0.1 MPa . They also calculated the thermodynamic properties, transport coefficients, and radiation properties of HFO-1336mzz­(E) mixtures . Research has shown that the arc quenching capability of 30% HFO-1336mzz­(E)/air mixtures can reach 96% that of SF 6 .…”