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Régimes d'écoulement diphasique du frigorigène R134a dans un conduit minicanal rectangulaire horizontal oscillant.

Two-phase flow regimes of refrigerant R134a in an oscillating horizontal rectangular minichannel conduit.

Auteurs : ENOKI K., ONO M., OKAWA T., AKISAWA A., MORI H., KRISTIAWAN B., WIJAYANTA A. T.

Type d'article : Article de la RIF

Résumé

In this study, refrigerant R134a experiments were carried out to observe two-phase flow in an oscillating horizontal rectangular minichannel conduit at refrigerant mass flux of approximately 30 kg•m − 2•s − 1 to 300 kg•m − 2•s − 1, saturation temperature of approximately 30 °C, and average vapor quality in the test section inlet of approximately 0.05 to 0.9. The test section was made from quartz and consists of a visible rectangular minichannel with a hydraulic diameter of 0.84 mm. The test section was oscillated vertically using a reciprocating motor. The effects of oscillation on slug and stratified flow patterns were investigated. The experimental observation was compared with an existing flow pattern map. The thin liquid film around the vapor of slug flow mostly moved up and down when the test section oscillated. As a result, a dry surface was not observed around the vapor due to the lower heat transfer coefficient. When the test section oscillated, the stratified flow changed to annular flow, and a dry surface was also not observed on the upper side of the minichannel conduit.

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Format PDF

Pages : 261-268

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    20 €

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Détails

  • Titre original : Two-phase flow regimes of refrigerant R134a in an oscillating horizontal rectangular minichannel conduit.
  • Identifiant de la fiche : 30027716
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 118
  • Date d'édition : 10/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.06.002
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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