Measurements of PVTx Properties for the Binary Refrigerant HCFC 142b + HCFC 22 System

This paper reports PVTx properties for the HCFC 142b + HCFC 22 system in a wide range of temperatures from 297 to 443 K, of pressures from 0.5 to 10.0 MPa, and of densities from 72 to 1079 kg/m3. For 4 compositions, l.e., 20, 40, 60, and 80 wt % HCFC 142b, 422 PVTx measurements have been made along 31 isochores. The uncertainties of the temperature, pressure, and density measurements are less than ±10 mK, ±3.0 kPa, and ±0.1 %, respectively. From the PVTx measurements for 20, 40, 60, and 80 wt % HCFC 142b, we have determined dew points and bubble points, enabling us to construct the dew- and bubble-point curves for each composition. We have also compared the vapor-liquid equilibrium data along three Isotherms, where the experimental data are reported by others, with the vapor-liquid equilibrium curve calculated from the Raoult’s law.