Partager

Simulation des modèles d'écoulement et évaporation à l'intérieur de tubes horizontaux aplatis.

Simulation of flow patterns and evaporation in horizontal flattened tubes.

Auteurs : THOME J. R., HAJAL J. el

Résumé

Flattened tubes are an interesting alternative to round tubes as they greatly reduce the refrigerant charge in direct-expansion evaporators and provide for a more compact heat exchanger design. Flattened tubes refer to plain round tubes that have been rolled (or extruded) flat on top and bottom and remain round at the two ends. Compared at the same mass flow rate, heat transfer coefficients in a flattened tube are about 100 to 150% higher than those for the corresponding round tube at nearly all vapour qualities, but it is also predicted to have a much larger two-phase pressure drop.

Détails

  • Titre original : Simulation of flow patterns and evaporation in horizontal flattened tubes.
  • Identifiant de la fiche : 2004-0122
  • Langues : Anglais
  • Source : ASHRAE Transactions. 2002 annual Meeting, Honolulu, Hawaii. Volume 108, part 2 + CD-ROM.
  • Date d'édition : 2002

Liens


Voir d'autres communications du même compte rendu (85)
Voir le compte rendu de la conférence

Indexation