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Prediction of refrigerant-lubricant viscosity using the general PC-SAFT friction theory.

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

Type of article: Article, IJR article

Summary

In this work, a friction theory (f-theory) viscosity model founded on the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state (EoS) was used to calculate the viscosity of refrigerant-oil mixtures. The model, which links viscosity to the repulsive and attractive pressure terms of the PC-SAFT EoS, can provide satisfactory viscosity predictions of mixtures of carbon dioxide (R-744) and two synthetic lubricants, namely, a polyolester (POE) ISO VG 68 and an alkylbenzene (AB) ISO VG 32, as well as mixtures of isobutane (R-600a) and two other synthetic lubricants, a POE ISO VG 7 and an AB ISO VG 5. The root-mean square (RMS) deviations related to the viscosity prediction were 0.69% (R-600a/POE ISO 7), 0.99% (R-600a/AB ISO VG 5), 3.16% (R-744/POE ISO VG 68) and 3.18% (R-744/AB ISO VG 32).

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Pages: 92-99

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Details

  • Original title: Prediction of refrigerant-lubricant viscosity using the general PC-SAFT friction theory.
  • Record ID : 30011936
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 45
  • Publication date: 2014/09

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