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Document IIF

Présence d'huile dans un évaporateur : validation expérimentale d'un modèle de calcul d'enthalpie de mélange de frigorigène/huile.

Oil presence in an evaporator: experimental validation of a refrigerant/oil mixture enthalpy calculation model.

Auteurs : YOUBI-IDRISSI M., BONJOUR J., TERRIER M. F., et al.

Type d'article : Article, Article de la RIF

Résumé

In this study, the impact of the oil presence on the performance of a refrigerating machine was investigated both experimentally and numerically. To highlight the effect of oil, particularly on the evaporator behaviour, a theoretical model of enthalpy calculation for a refrigerant/oil mixture has been previously developed. In order to validate this model, tests were carried out on an industrial refrigerating machine working with R407C. The lubricant is a polyol-ester oil whose solubility curves are given by the oil manufacturer. The oil circulating mass fraction is measured by a sampling technique and by an on-line density measurement method, whose advantages and drawbacks are presented. Both the model and the experiments show that the ratio of enthalpy change through the evaporator with to without the oil presence increases when the apparent superheat at the evaporator outlet increases. This is due to the presence of a non-evaporated amount of liquid refrigerant dissolved in the oil at this location, which is confirmed by visual observations. The numerical and experimental results are found to be in good agreement as the maximum deviation is about 2.2%.

Documents disponibles

Format PDF

Pages : 215-224

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Oil presence in an evaporator: experimental validation of a refrigerant/oil mixture enthalpy calculation model.
  • Identifiant de la fiche : 2004-1103
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 27 - n. 3
  • Date d'édition : 05/2004

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