THERMODYNAMIC PROPERTIES OF LOW-GWP ALTERNATIVE REFRIGERANTS

摘要

Thermodynamic properties of HFO-1123 (CF_2=CHF), including critical parameters, vapor-liquid coexistencerncurve, vapor pressure and PVT properties, were determined experimentally. The measurements of vaporliquidrncoexistence curve in the critical region were made through visual observation of the disappearance ofrnmeniscus at the vapor-liquid interface within an optical cell. The vapor pressure and the PVT properties werernmade using the constant-volume method. The saturated liquid densities were obtained by the method usingrnpyrex glass floats. The new experimental data and correlations were presented.