高电压技术2017，Vol.43Issue(3)：708-714,7.DOI:10.13336/j.1003-6520.hve.20170303003
环保气体C4F7N和C5F10O与CO2混合气体的绝缘性能及其应用
Insulation Performance and Application of Enviroment-friendly Gases Mixtures of C4F7N and C5F10O with CO2
摘要
Abstract
Recently,fluoroketone and fluoronitrile gases attract great attention as potential SF6 substitutes.We studied the insulation performances of the mixtures of C4F7N and C5F1oO with CO2.First,the Antoine constants were fitted by the reported liquefaction temperature data of C4F7N and C5F10O.The saturated vapor pressure characteristics of C4F7N-CO2 and C5F10O-CO2 mixtures were analyzed.Secondly,by combining the Antoine equation and the basic law of vapor liquid equilibrium,the application conditions at limits of environment temperature were discussed.Finally,the critical electric field strengths were determined from the experimental data in literatures,and the insulation performances and potentials of C4F7N-CO2 and C5F10O-CO2 mixtures were discussed.It is found that the electrical strengths of the C4F7N-CO2 mixture under the limits of three environment temperatures (-5 ℃,-15 ℃,and-25 ℃) are all much higher than those of the C5F10O-CO2 mixture,and the proper choice of mixed ratio and pressure for C4F7N-CO2 can provide relatively high electrical strength,low GWP,and liquefaction temperature.Taking the environment temperature limit of-25 ℃ for example,the electrical strength of the 5％C4F7N-95％CO2 mixture at 0.65 MPa can approximate pure SF6 gas at 0.5 MPa.In addition,the GWPs of C4F7N-CO2 mixtures are below 850 when C4F7N concentration is less than 20％.关键词
C4F7N/C5F10O/新型环保气体/饱和蒸气压/绝缘特性Key words
C4F7N/C5F10O/newly enviroment-friendly gas/saturated vapor pressure/insulation characteristic引用本文复制引用
李兴文,邓云坤,姜旭,赵虎,卓然,王邸博,傅明利..环保气体C4F7N和C5F10O与CO2混合气体的绝缘性能及其应用[J].高电压技术,2017,43(3):708-714,7.基金项目
国家自然科学基金(51577143 （）
51607143) （）
中国博士后科学基金资助项目(2016M602728).Project supported by National Natural Science Foundation of China (51577143,51607143),China Postdoctoral Science Foundation (2016M602728). （2016M602728）
