Vapor Pressure of Pentafluoroethane and Trifluoroiodomethane  

作　　者：Zhang Chang Department of Mechanical Engineering, Wuhan Institute of Science and Technology, Wuhan 430073, China Duan Yuanyuan Sbi Lin Zhu Mingshan Han Lizhong Department of Thermal Engineering, Tsinghua University, Beijing 100084, China. 

出　　处：《Journal of Thermal Science》2001年第3期193-197,共5页热科学学报（英文版）

摘　　要：Pentafluoroethane (HEC-125) and trifluoroiodomethane (CF3I) are considered as promising refrigerant alternatives, especially as components in mixtures, to replace CFCs or HCFCs. Effective uses of HFC-125 and CF3I require that the thermophysical properties be accurately measured. In the present work, vapor pressure data of HFC-125 and CF3I have been measured in the temperature range from 292 to 337 K and 288 to 336 K, respectively. Maximum total pressure uncertainty of HEC-125 data is estimated to be within ±1.2 kPa and ±780 Pa for CF3I. Based on the data set and literature values, the vapor pressure equations for HEC-125 and CF3I have been developed. The relative deviation of the equations correlate the measurements within 0.022% for HEC-125 and 0.068% for CF3I, respectively.

关 键 词：PENTAFLUOROETHANE TRIFLUOROIODOMETHANE vapor pressure vapor pressure equation. 

分 类 号：TK211[动力工程及工程热物理—动力机械及工程]