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Étude expérimentale sur l’écoulement du R-600a à l’intérieur d’un tube capillaire en spirale hélicoïdale diabatique : Configuration concentrique.

Experimental investigation on flow of R-600a inside a diabatic helically coiled capillary tube: Concentric configuration.

Auteurs : DUBBA S. K., KUMAR R.

Type d'article : Article, Article de la RIF

Résumé

This paper presents an experimental study of a diabatic flow of R-600a through a concentric configured helically coiled capillary tube suction line heat exchanger. The details of experimental facility for testing the diabatic capillary tube with different inlet sub-cooling degree and pressure are discussed. The effect of coil diameter, capillary length, capillary tube diameter, sub-cooling degree and inlet pressure on mass flow rate are presented. The degree of sub-cooling at the inlet of both straight and helical capillary tube is varied from 3–20?°C. In case of diabatic flow, the coiling reduces the mass flow rate of R-600a by 3–12 percent as compared to straight capillary tube. The refrigerant mass flow rate is scattered up with rise of pressure. A semi empirical correlation to predict the mass flow rate of R-600a flowing through a diabatic helical coiled capillary tube is proposed for sub-cooled inlet conditions. The proposed correlation predicts measured data with an error band of?±?20 percent.

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Pages : 186-195

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Détails

  • Titre original : Experimental investigation on flow of R-600a inside a diabatic helically coiled capillary tube: Concentric configuration.
  • Identifiant de la fiche : 30023141
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 86
  • Date d'édition : 02/2018
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.10.035

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