TRANSPORT-PROPERTIES OF 1,1,1,2-TETRAFLUOROETHANE (R134A)

New equations for the thermal conductivity and the viscosity of R134a that are valid in a wide range of pressures and temperatures are prese nted. They were obtained through a theoretically based, critical evalu ation of the available experimental data, which showed considerable in consistencies between data sets, in particular in the vapor phase. In the critical region the observed enhancement in the thermal conductivi ty is well represented by a crossover model for the transport properti es of fluids. Since thermodynamic properties enter into the calculatio n of the critical enhancement of the transport properties, a new funda mental equation for the critical region was developed also.