Modeling absorption of pure refrigerants and refrigerant mixtures in lubricant oil |
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Authors: | Tobias R. Gessner Jader R. Barbosa Jr |
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Affiliation: | aDepartamento de Engenharia Mecânica, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil |
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Abstract: | This paper addresses the problem of absorption of refrigerant vapor in a stagnant layer of lubricant oil. The bulk motion of the solute is described in terms of apparent diffusion coefficients that encompass both molecular diffusion and possible macroscopic motion induced by liquid density instability and surface tension. In absorption of refrigerant mixtures, diffusion in the vapor and liquid phases are coupled with a thermodynamic model for interfacial equilibrium. Results are compared with experimental data available in the literature for absorption of several refrigerants in polyol ester oil (POE68). The adequacy of the formulation is assessed in the light of its basic assumptions and performance of the model. |
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Keywords: | Refrigeration system Compression system Modelling Absorption Refrigerant OilMots clé s: Systè me frigorifique Systè me à compression Modé lisation Absorption Frigorigè ne Huile |
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