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Modelling of oil retention in the suction line and evaporator of air-conditioning systems.

Author(s) : RADERMACHER R., CREMASCHI L., SCHWENTKER R. A.

Type of article: Article

Summary

This paper presents a general method for computing the oil retained in the suction line and evaporator of an air-conditioning system. For the suction line, a new semi-empirical correlation for the interfacial shear stress friction factor is presented. The correlation agrees closely with experimental results for conventional refrigerants and CO2 and extends and merges with previous correlations available in the literature. The correlated friction factor is within 26% relative error as compared to experimental data. In the evaporator, oil retention volume was computed by using the Permoli et al. void fraction model and applying heat transfer and pressure drop correlations for refrigerant/oil mixtures. As a result, oil retention was predicted within 21% average relative error.

Details

  • Original title: Modelling of oil retention in the suction line and evaporator of air-conditioning systems.
  • Record ID : 2006-1203
  • Languages: English
  • Source: HVAC&R Research - vol. 12 - n. 1
  • Publication date: 2006/01

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