Predicting the viscosity of halogenated hydrocarbon mixtures

• Published in: Fluid phase equilibria Vol. 199; no. 1; pp. 295 - 306
• Main Author: Vesovic, V.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 30.06.2002; Elsevier Science
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Mixture; Refrigerant; Refrigerants; Refrigerating engineering; Refrigerating engineering. Cryogenics. Food conservation; Viscosity; Viscosity; Model; Refrigerant; Mixture; Halogenated hydrocarbon; Hydrocarbon; Binary system; Prediction; Modeling; Refrigerant fluid; Propane; Rheological properties
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/S0378-3812(01)00802-0

The viscosity of three refrigerant mixtures, namely R125–R134a, R152a–R134a and propane–R134a, has been evaluated by a prediction method based on kinetic theory. The method has no adjustable parameters and, in essence, relies upon knowledge of the viscosity of the pure components to predict the viscosity of a mixture by means of rigid-sphere formalism. The predictions have been compared with experimental data available along the liquid saturation line. The viscosity of R125–R134a and R134a–R152a mixtures has been reproduced remarkably well, to within ±4%. The viscosity of propane–R134a mixture was underpredicted at the lowest temperature (250 K) by 20%. The failure of the method to predict the viscosity of propane–R134a more accurately, is primarily attributed to the strong non-ideality of the propane–R134a mixture.