推算 CFC_S 替代物导热系数的新的基团贡献法

A new contribution method used in the thermal conductivity calculation for CFC S substitues

在Ｒｏｙ和Ｔｈｏｄｏｓ法的基础上，得到了一种适合于低压下甲烷系和乙烷系氟里昂气体导热系数的推算方法。用１７种氟里昂在Ｔ＝２５０～５００Ｋ范围内，对新方法作了验算。计算表明，新方法的计算精度比原方法有明显提高。

The method of Roy and Thodos is improved to suit the calculation of the gas thermal conductivity of both methane and ethane series Freons under low pressure. The results of the new method used in 17 Freons(T=250～500 K) show that it is better than old one in accuracy.