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An evaluation of the effect of lubricants on the thermodynamic properties and performance of refrigerant mixtures in refrigeration and air conditioning cycles.

Author(s) : CORR S., MORRISON J. D., MURPHY T. F.

Summary

The state equation, based on the MHV-2 approach, was developed to predict the properties of refrigerant-lubricant mixtures. The equation was used to predict the effect on the cycle performance of the presence of a polyol ester oil in the ternary blend R407A. The results show that in a simple reference cycle (isobar condensation and evaporation, isentropic compression), even a moderate oil percentage (i.e., 2%) can significantly reduce the COP (about -10% for R407A) and the refrigerating effect, under the hypothesis of no superheating at the evaporator outlet.

Details

  • Original title: An evaluation of the effect of lubricants on the thermodynamic properties and performance of refrigerant mixtures in refrigeration and air conditioning cycles.
  • Record ID : 1997-3267
  • Languages: English
  • Source: Condizionamento, riscaldamento, refrigerazione: innovazioni e tendenze. 37e Convegno annuale AICARR./ Air Conditioning, Heating and Refrigeration: Innovations and Trends. 37th annual conference of AICARR.
  • Publication date: 1996/03/29
  • Document available for consultation in the library of the IIR headquarters only.

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