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An evaluation of the effects 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 F. T.

Summary

A thermodynamic model based on a Wilson-MHV-2 methodology has been developed to predict the thermodynamic properties of quaternary mixtures comprising the refrigerants R32, R125 and R134a and an ISO32 mixed-acid polyolester lubricant. The interaction parameters for this model have been derived by fitting to experimental vapour liquid equilibria (VLE) data for binary mixtures. The capability of the Wilson-MHV-2 model to predict the VLE behaviour of the quaternary lubricant-refrigerant mixtures has been examined by comparison with experimental VLE data measured directly for a specific mixture composition. Under most normal system operating conditions, the effects of oil are expected to be small but may increase significantly for those points in the cycle that are operating close to the dew point line of the oil-free refrigerant.

Details

  • Original title: An evaluation of the effects of lubricants on the thermodynamic properties and performance of refrigerant mixtures in refrigeration and air conditioning cycles.
  • Record ID : 1997-0094
  • Languages: English
  • Source: Proceedings of the 1996 Purdue International Refrigeration Conference.
  • Publication date: 1996/07/23
  • Document available for consultation in the library of the IIR headquarters only.

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