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Document IIF

Transfert de chaleur lors de la condensation de reflux du R134a à l’intérieur d’un tube à micro-ailettes avec différentes inclinaisons de tube.

Heat transfer during reflux condensation of R134a inside a micro-fin tube with different tube inclinations.

Auteurs : YILDIZ S., DUYMAZ G., ZIEGLER F., et al.

Type d'article : Article, Article de la RIF

Résumé

This study presents an experimental investigation of the heat transfer occurring during reflux condensation of refrigerant R134a in an inclined micro-fin tube (0.008?m OD, 0.5?m length). The experiments were carried out at a system pressure of 0.74?MPa and at inclination angles of 30°, 38°, 45°, 60° and 90° from the horizontal. The experiments indicated that the inclination angle has a significant effect on heat transfer during reflux condensation. The maximum reflux heat transfer coefficient was found at 30° inclination angle. At this arrangement, the heat transfer increased by a factor of 2.45 compared to the vertical case. A comparison with previous studies suggests that the heat transfer in a micro-fin tube is 2.2 times better than that in a plain tube, and 1.34 times better than that in a plain rectangular channel both at 30° inclination.

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Format PDF

Pages : 423-432

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Détails

  • Titre original : Heat transfer during reflux condensation of R134a inside a micro-fin tube with different tube inclinations.
  • Identifiant de la fiche : 30020123
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 74
  • Date d'édition : 02/2017

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