SATURATED LIQUID VISCOSITY CORRELATIONS FOR ALTERNATIVE REFRIGERANTS

This article presents dimensionless equations for the temperature depe ndence of the saturated liquid viscosity of R32, R123, R124, R125, R13 4a, R141b, and R152a valid over a temperature range of engineering int erest. The correlation has the form Phi(D)(n)=A+BTD where Phi(D) is th e dimensionless fluidity (1/eta(D)) and T-D is a dimensionless tempera ture. n, A, and B are evaluated for each of the above refrigerants bas ed on a least-squares fit to experimental data. This equation is found to provide an improved fit over those existing in the literature up t o T-D=0.8.