Partager

Document IIF

Régimes d’écoulement diphasique lors de de la condensation de R-134a à faible flux massique dans des microcanaux rectangulaires.

Two-phase flow regimes of condensing R-134a at low mass flux in rectangular microchannels.

Auteurs : VANDERPUTTEN M. A., JACOB T. A., SATTAR M., et al.

Type d'article : Article, Article de la RIF

Résumé

Qualitative two-phase flow regime data are obtained from high-speed visualization of condensing flows of R-134a at mass fluxes from 75 to 150?kg?m-2?s-1 and quality from 0.1 to 0.8 in square microchannels (DH?=?0.84?mm) cooled from a single side. Superheated R-134a is distributed into multiple parallel microchannels and then partially condensed, using a counterflow water loop, to the desired quality prior to the inlet of a visualization section. This experimental arrangement mitigates the potential for flow maldistribution. Despite very small heat duties, a low uncertainty in the quality in the visualization section is maintained by enforcing a large temperature difference on the water-side (?T?>?10?K). For all conditions, annular or annular/wavy type flow were observed, with no distinct intermittent flow. Data are compared with flow macro and mini/microchannel maps, which are shown to over predict the occurrence of intermittent or wavy flow.

Documents disponibles

Format PDF

Pages : 92-103

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 : Two-phase flow regimes of condensing R-134a at low mass flux in rectangular microchannels.
  • Identifiant de la fiche : 30022523
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 84
  • Date d'édition : 12/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.08.021

Liens


Voir d'autres articles du même numéro (26)
Voir la source

Indexation