Prediction method of both azeotropic and critical points of the binary refrigerant mixtures

  • Saida Fedali Laboratory of Studies of the Industrial Energy Systems (LESEI), University of Batna 2, Algeria
  • Hakim Madani Laboratory of Studies of the Industrial Energy Systems (LESEI), University of Batna 2
  • Cherif Bougriou Laboratory of Studies of the Industrial Energy Systems (LESEI), University of Batna 2

Abstract

The prediction of the azeotropic point and the determination of the critical point in binary mixtures is very important in refrigerating industry. In this task, a simple method is presented in order to predict and determine both azeotropic and critical points. Our method employs experimental data and a thermodynamic model. 1,1,1,2-tetrafluoroethane (R134a) in the mixture presents the possibility of inventing the azeotropic and critical properties. The mixtures studied in this work are: Cyclopropane (RC270), Propylene (R1270), Hexafluoroethane (R116) and Carbon dioxide (R744) based on 1,1,1,2-tetrafluoroethane (R134a). The model consists of the Peng–Robinson equation of state (EoS), the Mathias–Copeman alph a function and the Wong-Sandler mixing rules involving the NRTL model. The results proved that there is a good agreement between the predicted values and the experimental data. The presented methods are able to predict the azeotropic and determine critical positions.

Published
2017-05-17
How to Cite
FEDALI, Saida; MADANI, Hakim; BOUGRIOU, Cherif. Prediction method of both azeotropic and critical points of the binary refrigerant mixtures. Journal of Applied Engineering Science & Technology, [S.l.], v. 3, n. 1, p. 37-41, may 2017. ISSN 2352-9873. Available at: <http://revues.univ-biskra.dz/index.php/jaest/article/view/2159>. Date accessed: 18 aug. 2017.
Section
Section E: Chemical and Process Engineering