Fluid Phase Equilibria, Vol.111, No.2, 203-212, 1995
Accurate Vapor-Pressure Equation for Refrigerants
This paper contains parameters for a universal vapor pressure equation describing methane, ethane, propane, n-butane, i-butane, R-11, R-12, R-22, R-23, R-32, R-123, R-124, R-125, R-134a, R-141b, R-142b, R-143a and R-152a. These parameters have been generated using experimental vapor pressures reported in literature. The vapor pressure equation, based upon asymptotic behavior at the triple and critical points, has three adjustable fluid-dependent parameters. This equation describes the entire vapor pressure curve within the apparent accuracy of the experimental values.
Keywords:PHASE PVT-DATA;THERMODYNAMIC PROPERTIES;EBULLIOMETRIC MEASUREMENT;COEXISTENCE CURVE;1;1-DICHLORO-2;2;2-TRIFLUOROETHANE R123;1;1;1;2-TETRAFLUOROETHANE R-134A;CHLORODIFLUOROMETHANE R22;LIQUID DENSITIES;1;1-DIFLUOROETHANE;GAS