Predicting the viscosity of halogenated hydrocarbon mixtures
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 visc...
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Published in | Fluid phase equilibria Vol. 199; no. 1; pp. 295 - 306 |
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Main Author | |
Format | Journal Article Conference Proceeding |
Language | English |
Published |
Amsterdam
Elsevier B.V
30.06.2002
Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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ISSN: | 0378-3812 1879-0224 |
DOI: | 10.1016/S0378-3812(01)00802-0 |