Corresponding States Relationships of PVT Properties of Working Fluids

A new corresponding states compressibility factor, defined as ˆZr = (1−Z) (1−Zc), and a new generalized prediction method for the PVT properties of fluids of iInterest using water as a reference fluid are proposed on the basis of the corresponding states principle. The values of the specific volumes of 23 working fluids, including CFCs, HCFCs, HFCs, HCs, NH3, etc., were investigated in the gas-phase region, the supercritical region, and the saturated-gas region with water as the reference fluid. The average deviations of the investigated fluids from literature results are generally within 1%.