摘要
As part of the study on thermophysical properties of HFC-134a,this paper concerns itself with vapor pressure of HFC-134a in the temperature range of 279.15K to 365.15K.A total of 43 measurement data were measured during the experiment which was conducted on a high precision PVTx test apparatus designed by the authors with slight modifications.Uncertainties of temperature was ±10mK and of pressure was ±500Pa.Purity of sample was either 99.95wt% or 99.98wt%.Data resulting from this experiment matched closely with the newest data published internationally.Compared to our proposed equation for calculating vapor pressure of HFC-134a, the RMS deviation of experimental data was only 0.0531%,showing relatively high precision.
