EQUATIONS FOR REFRIGERANTS R32 AND R125 VISCOSITY CALCULATION

Equations for alternative refrigerants R32and R125 viscosity calculation expressed in terms of independent variables, such as temperature and density are worked out. Equation coefficients are determined by the least square technique according to the experimental data. The equations de- scribe the viscosity at temperatures ranging from 232 to 423 K at a pressure up to 9.8 MPa for R32 and from 230 to 423 K at a pressure up to 10.1 MPa for R125. The composed equations accuracy is quite acceptable for engineering calculations.