Abstract

The prediction and the determination of the azeotropic point of the binary or ternary refrigerants are very important in refrigerating industry. In this task, a simple method is presented in order to predict and determine the azeotropic point. Our method employs experimental data and a thermodynamic model. trifluoroiodomethane (R13I1) in the mixture presents the possibility of inventing the azeotropic properties. The mixtures studied in this work are: binary mixtures R600a + R1234ze, R600a + R13I1, R1234ze + R13I1 and the ternary mixture R600a + R1234ze + R13I1. The model consists of the Peng–Robinson equation of state (EoS), the Mathias–Copeman alpha function and the Wong-Sandler mixing rules involving the NRTL model. The results proved that there are a good agreement between the predicted values and the experimental data. The presented methods are able to predict the azeotropic positions in binary or ternary mixture.

Authors and Affiliations