Trifluoroiodomethane (CF3l) is consider as a Promising refrigerant alternative, especially as a component inmixtures, to replare CFC-12. But reliable thermophysical propelty data for CF3I are still limited. The invest...Trifluoroiodomethane (CF3l) is consider as a Promising refrigerant alternative, especially as a component inmixtures, to replare CFC-12. But reliable thermophysical propelty data for CF3I are still limited. The investigationson thermophysical Propelties of CF3I developed by us are summarized in this paper. Experimental data of criticalParamethe, and the condations of saturated liquid and vapor density, enthaipy of vaporization, vapor pressurs,PVT prowtes, second vinal coefficient ideal-gas heat capacity, surface tension, viscosity and thermalconduchvity are given in the Present paper.展开更多
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 requ...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.展开更多
文摘Trifluoroiodomethane (CF3l) is consider as a Promising refrigerant alternative, especially as a component inmixtures, to replare CFC-12. But reliable thermophysical propelty data for CF3I are still limited. The investigationson thermophysical Propelties of CF3I developed by us are summarized in this paper. Experimental data of criticalParamethe, and the condations of saturated liquid and vapor density, enthaipy of vaporization, vapor pressurs,PVT prowtes, second vinal coefficient ideal-gas heat capacity, surface tension, viscosity and thermalconduchvity are given in the Present paper.
文摘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.
