TY - JOUR
T1 - Analysis of the insulation characteristics of CF3I mixtures with CF4, CO2, N2, O2 and air
AU - Li, Xingwen
AU - Zhao, Hu
AU - Wu, Jian
AU - Jia, Shenli
PY - 2013/8/28
Y1 - 2013/8/28
N2 - This paper investigates the insulation characteristics of CF3I mixtures with CF4, CO2, N2, O2 and air by Boltzmann equation analysis (with mole percentages), neglecting the influence of electron-vibrational superelastic collisions. The critical reduced electric field strength (E/N)cr of a electronegative gas can be considered as the value for which the reduced effective ionization coefficient ( - η)/N = 0. First, the reduced ionization coefficient /N, reduced attachment coefficient η/N and (-η)/N of CF3I mixtures with CF4, CO2, N2, O2 and air are calculated. Then the (E/N)cr of those mixtures are determined. The results indicate that CF3I-N2 and CF3I-air have a superior insulation performance than the other three mixtures. Further, the (E/N)cr of CF3I-N2 and CF3I-air are obviously higher than that of SF6-N2 at the CF 3I concentration higher than 65%, and even higher than that of pure SF6 at the CF3I concentration higher than 70%. In addition, the calculated results of CF3I and CF3I-N 2 are compared with the experiment values from other literature for confirming the validity of present calculation method and parameters.
AB - This paper investigates the insulation characteristics of CF3I mixtures with CF4, CO2, N2, O2 and air by Boltzmann equation analysis (with mole percentages), neglecting the influence of electron-vibrational superelastic collisions. The critical reduced electric field strength (E/N)cr of a electronegative gas can be considered as the value for which the reduced effective ionization coefficient ( - η)/N = 0. First, the reduced ionization coefficient /N, reduced attachment coefficient η/N and (-η)/N of CF3I mixtures with CF4, CO2, N2, O2 and air are calculated. Then the (E/N)cr of those mixtures are determined. The results indicate that CF3I-N2 and CF3I-air have a superior insulation performance than the other three mixtures. Further, the (E/N)cr of CF3I-N2 and CF3I-air are obviously higher than that of SF6-N2 at the CF 3I concentration higher than 65%, and even higher than that of pure SF6 at the CF3I concentration higher than 70%. In addition, the calculated results of CF3I and CF3I-N 2 are compared with the experiment values from other literature for confirming the validity of present calculation method and parameters.
UR - https://www.scopus.com/pages/publications/84882328962
U2 - 10.1088/0022-3727/46/34/345203
DO - 10.1088/0022-3727/46/34/345203
M3 - 文章
AN - SCOPUS:84882328962
SN - 0022-3727
VL - 46
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 34
M1 - 345203
ER -