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A departure function-based method to determine the effect of the oil circulation ratio on the performance of vapor compression refrigeration systems.

Number: pap. 2141

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

Summary

A method to estimate the performance of single-stage vapor compression refrigeration systems as a function of the oil circulation ratio is presented. The model is based on the Peng-Robinson equation of state and on the theory of departure functions to estimate the mixture enthalpy, entropy and specific volume as a function of pressure, temperature and mixture composition. The method is applied to a mixture of isobutane (R600a) and alkyl benzene oil. Pressure-enthalpy diagrams are presented as a function of the oil circulation ratio. These are used in conjunction with a thermodynamic cycle analysis in which the behavior of overall performance parameters such as cooling capacity, compressor power and coefficient of performance are compared with those obtained for the baseline (i.e., pure refrigerant) condition.

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Pages: 10 p.

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Details

  • Original title: A departure function-based method to determine the effect of the oil circulation ratio on the performance of vapor compression refrigeration systems.
  • Record ID : 30006592
  • Languages: English
  • Source: 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2012/07/16

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