Abstract

For environmental protection, low-GWP refrigerants are required in HVAC/R industries. To replace refrigerants with low GWP ones rapidly, reliable thermodynamic model that is essential for system performance calculation is also required. Recently, Extended Corresponding States (ECS) model is used for cycle simulation of various candidate refrigerants, however, reproducibility of property estimation by ECS model have not studied yet. In this work, by ECS model with parameters determined applicable to various refrigerants, estimation accuracy of saturated properties and theoretical performance is evaluated. The average absolute deviations for the saturated properties were 5.7 % for the vapor pressure, 11 % for the saturated liquid density, and 2.0 % for the latent heat of evaporation at Tr = 0.7. On the other hand, in the calculation of the theoretical refrigeration cycle performance, the accuracy was better than 1 % for COP, but the prediction accuracy for volumetric capacity was slightly lower, around 6.7 %.