pvT Properties of the Refrigerant Blend R 473A in the Vapor Phase

抄録

R 473A is an emerging four-component refrigerant blend for replacing high GWP and flammable refrigerants currently used for low temperature applications. Since limited prior publications on the thermodynamic properties of R 473A are available, the initial investigation of its vapor phase pvT properties were carried out and are presented here. The pvT properties were measured using two separate isochoric apparatus for the temperature range of 270 K to 400 K, density range of 43 kg·m^-3 to 210 kg·m^-3 and at pressures below 7 MPa. The virial equation of state was used to verify the measured properties. The linearized virial equation was used to determine the second and third virial coefficients. This method provided an absolute average deviation in pressure and density of 0.29% and 0.38%, respectively. The measured properties were all within 1% deviations which signify the accuracy of the results and the potential for them to be used as preliminary data for developing a more accurate representation of R 473A properties through equations of state.