Comprehensive Thermodynamic Approach to Modelling Refrigerant–Lubricating Oil Mixtures

A new Thermodynamic Approach for modelling mixtures of refrigerants and lubricating oils is presented. The model includes generalized methods for predicting the following thermodynamic properties of refrigerant-oil mixtures: bubble point temperatures, local oil concentrations, liquid specific heats release (enthalpy) curves are easily generated and also the effect of oil on the LMTD of evaporators can be modelled. A new definitionof the boiling heat transfer coefficient based on the bubble point temperature is also presented. The new Thermodynamic Approach will allow major advances to be made in two-phase refrigeration heat transfer research and design since now the type of oil and the effects of its physical properties can be included in the analysis.

Published in:
Int. Journal of HVAC&R Research, 1, 2, 107–123

 Record created 2005-08-08, last modified 2018-03-17

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