TRANSPORT PROPERTIES FOR REFRIGERANT MIXTURES
DOI:
https://doi.org/10.15673/0453-8307.3/2014.32552Keywords:
Refrigerant – Mixtures – Viscosity – Thermal conductivity – Model – Prediction.Abstract
A set of models to predict viscosity and thermal conductivity of refrigerant mixtures is developed. A general model for viscosity and thermal conductivity use the three contributions sum form (the dilute-gas terms, the residual terms, and the liquid terms). The corresponding states model is recommended to predict the dense gas transport properties over a range of reduced density from 0 to 2. It is shown that the RHS model provides the most reliable results for the saturated-liquid and the compressed-liquid transport properties over a range of given temperatures from 0,5 to 0,95.
References
REFERENCES
1. Kestin, J., Ro, S. T., and Wakeham, W. 1972. Kinetic theory for the viscosity of gases. Physica, Vol. 58, pp. 165-174.
2.Nagaoka, K., Tanaka, Y., Kubota, H., and Makita, T. 1986. Viscosity equation for the low-pressure fluorocarbons. Int J. Thermophysics, Vol. 7, No. 5, pp. 1023-1030.
3.Geller, V. Z. and Paulaitis, M. E. 1992. The calculation and prediction of transport properties for new refrigerants and blends in refrigeration application. In Proc. of Intern. CFC and Halon Alternative Conf., Washington, DC, pp. 115-124.
4.Tanaka, Y., Matsuo, S., and Taya, S. 1995. Gaseous thermal conductivity of difluoromethane (HFC-32), pentafluoroethane (HFC-125), and their mixtures. Int. J. Thermophysics, Vol. 16, No. 1, pp. 121-131. doi: 10.1007/bf01438963
5.Geller, V. Z., Nemzer, B. V., and Cheremnykh, U. V. 2001. Thermal conductivity of mixed refrigerants R404A, R407C, R410A, and R507A. Int. J. Thermophysics, Vol. 22, No. 3, pp. 29-37.
6.Grebenkov, A., Kotelevsky, Y., and Saplitza, V. 2000. Thermal conductivity of the ternary refrigerant mixtures (R32-R125-R134a). In Proc. of 14th Symposium on Therm. Prop., Boulder, CO, pp. 256-264.
7.Bivens, D. B., Yokozeki, A., Geller, V. Z., and Paulaitis, M. E. 1993. Transport properties and heat transfer of alternatives for R502 and R22. In Proc. of ASHRAE/NIST Refrigerants Conference, Gaithersburg, MD, pp. 73-84.
8.Perkins, R. A, Schwarzberg, E, and Gao, X. 1999. Experimental thermal conductivity values for mixtures of R32, R125, R134a, and propane. NIST Report NISTIR 5093.
9.Assael, M. J., Dymond, J. H., and Polimatidou, S., K,. 1994. Correlation and prediction of dense fluid transport coefficients. VI. n-alcohols. Int. J. Thermophysics, Vol. 15, No. 2, pp. 189-201. doi: 10.1007/bf01441581
Assael, M. J., Dymond, J. H., and Polimatidou, S., K,. 1995. Correlation and prediction of dense fluid transport coefficients. VII. Refrigerants. Int. J. Thermophysics, Vol. 16, No. 3, pp. 761-772.
doi: 10.1007/bf01438861
Gao, X., Assael, M. J., Nagasaka, Y., and Nagashima, A. 2000. Prediction of the thermal conductivity and viscosity of binary and ternary HFC refrigerant mixtures. Int. J. Thermophysics, Vol. 21, No. 1, pp. 23-34.
Bleazard, J. G. and Teja, A. S. 1996. Extension of the rough hard-sphere theory for transport properties to polar liquids. Ind. Eng. Chem. Res., Vol. 35, pp. 2453-2459. doi: 10.1021/ie9507585
Laesecke, A. and Hafer, R. F. 2001. Viscosity of fluorinated propane isomers. II. Measurements of three compounds and model comparisons. J. Chem. Eng. Data, Vol. 46, No. 2, pp.433-445.
Heide, R. 1996. Viskositaet von fluessigen HFKW-Kaeltemitteln und deren Gemischen. DKV-Tagungsber. (23), Leipzig, Vol. II/1, pp. 225-241.
Ripple, D, and Matar, O. 1993. Viscosity of the saturated liquid phase of six halogenated compounds and three mixtures. J. Chem. Eng. Data, Vol. 38, No. 4, pp. 560-564. doi: 10.1021/je00012a021
