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为获得不破坏臭氧层的环保工质的热物性数据 ,对HFC- 2 2 7ea的热力学性质进行了研究 ,精确测量了 2 43～375 K的饱和蒸气压 ,使用膨胀 -定容法测量了 2 78～ 377K,压力 0 .2 6～ 2 .6 MPa的 HFC- 2 2 7ea的气相 p VT性质 ,温度和压力测量的最大不确定度分别为± 10 m K和± 5 0 0 Pa。使用测量结果关联了 HFC- 2 2 7ea的蒸气压方程 ,导出了维里系数、饱和气相密度、饱和蒸发焓 ,并关联了截断维里型的状态方程用于再现 HFC- 2 2 7ea气相区的热力性质。
In order to obtain the thermophysical properties of environmentally friendly refrigerants without damaging the ozone layer, the thermodynamic properties of HFC-2 2 7ea were studied. The saturated vapor pressures of 2 43 ~ 375 K were accurately measured, and the swelling vapor pressures of 2 78 The pV properties of HFC-2 2 7ea at ~ 377K and pressure of 0.226 ~ 2.06 MPa, the maximum uncertainty of temperature and pressure measurement are ± 10 m K and ± 500 Pa, respectively. The vapor pressure equation of HFC-2 2 7ea is correlated with the measured results, and the Virial coefficient, the saturated vapor density and the saturated vaporization enthalpy are derived, and the truncated Villian equation of state is used to reproduce the HFC-2 2 7ea gas-phase region Thermal properties.