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Measurement of pressure-temperature-concentration relations for mixtures of R12/mineral oil and R134a/synthetic oil.

Author(s) : GREBNER J. J., CRAWFORD R. R.

Summary

A test facility was constructed to measure the pressure-temperature-concentration relations for mixtures of refrigerant and oil. Baseline data were collected for mixtures of dichlorodifluoromethane (R12) and two mineral oils at concentrations from 1 to 100% R12 (by mass) over the temperature range of -46 to 121 deg C. Data were also collected for mixtures of tetrafluoroethane (R134a) and two synthetic oils at concentrations from 5 to 100% R134a over the same temperature range. These data were used to develop empirical relations to predict the solubility behaviour of these refrigerant-oil mixtures. Experimental data were also compared with Raoult's rule and the Flory-Huggins theory. Comparison between these empirical and theoretical models shows that the empirical correlations are significantly more accurate at predicting solubility relations at conditions of equilibrium.

Details

  • Original title: Measurement of pressure-temperature-concentration relations for mixtures of R12/mineral oil and R134a/synthetic oil.
  • Record ID : 1994-0807
  • Languages: English
  • Source: ASHRAE Transactions 1993.
  • Publication date: 1993
  • Document available for consultation in the library of the IIR headquarters only.

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