基于基团贡献法推算混合制冷工质表面张力  

Prediction of the Surface Tension of Refrigerant mixtures with Group Contribution Method

作　　者：赵义逢 郑学林[1] 

机构地区：[1]上海海事大学,上海201306

出　　处：《制冷》2017年第2期32-37,共6页Refrigeration

摘　　要：基于基团贡献法,计算了现有四种纯组分摩尔表面积下,15种二元、4种三元混合制冷工质表面张力。通过对比不同摩尔表面积模型下的计算精度,得出利用Rasmussen摩尔表面积模型计算二元、三元混合制冷工质表面张力可得到较高精度。1193组二元混合制冷工质表面张力的相对平均偏差为0.15m N·m^(-1),100组三元混合制冷工质表面张力的相对平均偏差为-0.03m N·m^(-1)。因此,在Rasmussen摩尔表面积模型下的基团贡献法能够用于新型环保混合制冷工质表面张力的推算。Based on group contribution method, the surface tension of 15 kinds of binary and 4 kinds of ternary refrigerant mixtures are calculated for existing molar surface area models of pure component. The calculation accuracy of four molar surface area models are compared and the one proposed by Rasmussen shows a better prediction of the surface tension for both binary and ternary refrigerant mixtures. 1193 and 100 surface tension date for binary and ternary refrigerant mixtures are collected from the literatures to check the reliability and accuracy of the applied method. The results show that total average deviations from Rasmussen＇s model are 0. 15mN·m^-1 and -0. 03mN·m^-1, respectively, Therefore, the group contribution method with Rasmussen＇s surface model is suitable for the prediction of the surface tension of new environmentally friendly refrigerant mixtures.

关 键 词：基团贡献法 表面张力 混合制冷工质 

分 类 号：TQ413.22[化学工程]