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Prediction of phase and volumetric behaviour of mixtures of natural refrigerants and lubricant oil using the PC-SAFT equation of state.

Author(s) : NETO M. A. M., BARBOSA J. Jr

Summary

The perturbed-chain statistical associated-fluid theory (PC-SAFT) equation of state (Gross and Sadowski, 2001) with a single temperature dependent binary interaction parameter was utilized to correlate the phase behaviour of the following refrigerant-oil mixtures: R600a/AB ISO 5, R744/AB ISO 32 and R744/POE ISO 68 between 12 and 75°C, with pressures up to 2 and 15 MPa for the R600a and R744 mixtures, respectively. The absolute average deviation between the experimental data and the equation of state predictions of the phase behaviour was lower than 6% for all oil-refrigerant pairs. Liquid densities were predicted with absolute average deviations lower than 5% for all oil-refrigerant pairs. Miscibility gaps have been predicted at 12, 25 and 35°C for the R744 mixtures and barotropic behaviour was observed in the R744/AB ISO 32 at 12°C at pressures of the order of 12.5 MPa.

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Pages: 2009-5

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Details

  • Original title: Prediction of phase and volumetric behaviour of mixtures of natural refrigerants and lubricant oil using the PC-SAFT equation of state.
  • Record ID : 2009-1904
  • Languages: English
  • Source: 3rd Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2009/06/23

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