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Cadre de modélisation pour prévoir la distribution des écoulements diphasiques dans les collecteurs d’échangeurs de chaleur.

Modeling framework to predict two-phase flow distribution in heat exchanger headers.

Auteurs : MAHVI A. J., GARIMELLA S.

Type d'article : Article, Article de la RIF

Résumé

Mini- and microchannel heat exchangers have the potential to drastically decrease the size and cost of thermal systems, but they often underperform because of flow maldistribution. Maldistribution can be particularly acute when a two-phase mixture enters a heat exchanger header, which is difficult to ad- dress because the flow phenomena in these situations are poorly understood. Experimental studies in recent years have attempted to gain a better understanding of the flow regimes and distribution in man- ifolds, but methods to predict distribution in multi-channel heat exchangers have been lagging. A new modeling approach, which predicts the liquid and vapor flow rates in each channel of a microchannel heat exchanger based on header flow patterns and component pressure drop, is presented here. The pro- posed model shows good agreement with previously reported experimental results, predicting most of the data within the experimental error.

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Format PDF

Pages : 65-75

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Détails

  • Titre original : Modeling framework to predict two-phase flow distribution in heat exchanger headers.
  • Identifiant de la fiche : 30026564
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 104
  • Date d'édition : 08/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.04.031

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