Abstract：The liquefaction temperature of SF6/N2, SF6/CO2 and SF6/CF4 mixed gases, as potential substitute gases for SF6, is an important basis for people to evaluate the feasibility of substitution and a parameter that must be considered in engineering practice. Especially in the cold region, SF6 insulation equipment often faces the problem of loss of original insulation characteristics due to gas liquefaction. Studies have found that by incorporating difficult liquefied gas composition, can improve the critical value of mixed gas liquefaction temperature, based on the calculation target of mixed gas Antoine vapor pressure equation, and combining the fundamental laws of vapor liquid equilibrium, calculated three goals mixed gas under the conditions of different mix proportion coefficient k, saturated vapor pressure value of the mixed gas and the mixed gas liquefaction temperature changes in the relationship; The relationship between the liquefaction temperature of the mixed gas and the mixing ratio coefficient k was calculated and analyzed when the saturated vapor pressure of the mixed gas was 0.3MPa, 0.5MPa and 0.7MPa respectively. By comparing the liquefaction temperature data of the three target mixed gases, the superiority order of the three target mixed gases in solving the liquefaction temperature problem is obtained.
李鸿鹏, 丰驰尧, 李宝锋, 廖钊, 刘涛. SF6混合气体的液化特性研究[J]. 电气技术, 2020, 21(11): 57-60.
Li Hongpeng, Feng Chiyao, Li Baofeng, Liao Zhao, Liu Tao. The study on liquefaction characteristics of SF6 mixed gas. Electrical Engineering, 2020, 21(11): 57-60.
2020, Vol. 21 
