Abstract
The pρT properties in the liquid phase and gaseous phase include saturated vapor pressure of R 245fa (1,1,1,3,3-pentafluoropropane) were measured by metal-bellows volumometer. The measurement was carried out in the temperature range from 310 K to 410 K. As for the liquid phase, twenty nine pρT proper-3 ties were obtain-3 ed in the pressure range from 502 kPa to 5002 kPa and the density range from 910 kg･m to 1323 kg･m . As for the gaseous phase, forty four pρT-3 properties wer-3 e obtained in the pressure range from 209 kPa to2632 kPa and the density range from 12 kg･m to 184 kg･m . saturated vapor pressures were also obtained. The e-3 xperimental un-3 certainties are estimated to be 10 mK for temperatures, 1.7kPa for pressures, and 0.1 kg･m to 2.1 kg･m for densities. The sample purity was better than 99.80% in the mole fraction. On the basis of the pρT data, coefficients of the equation which is proposed by Sato et al. for liquid phase and virial equation for gaseous phase were obtained. From this result, the Sato equation was correlated with relative standard deviation of 0.07%. And the virial equation was correlated with relative standard deviation of 0.36%. In addition, saturated liquid density and saturated vapor density were determined by substituting the saturated vapor pressure into their equations. Then, the present data were compared with values calculated from existing equation of state.
