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Prévision de la distribution de l'écoulement dans des échangeurs de chaleur compacts à écoulements parallèles.

Predicting the flow distribution in compact parallel flow heat exchangers.

Auteurs : CAMILLERI R., HOWEY D. A., MCCULLOCH M. D.

Type d'article : Article

Résumé

This paper presents a computationally efficient flow network model to predict the flow distribution in compact multi-channel parallel flow heat exchangers. Compact U-type and Z-type heat exchangers with nine parallel channels were used as test case on which the model was validated to within 4–8% in terms of non-dimensional flow distribution ratio. The model was used to perform a sensitivity analysis of flow mal-distribution with changes in operational and geometric boundary conditions. The results show that the tube to header area ratio is an important global parameter for controlling mal-distribution. As the area ratio increases, flow mal-distribution becomes more pronounced and more sensitive to increased Reynolds number and decreased parallel pipe length.

Détails

  • Titre original : Predicting the flow distribution in compact parallel flow heat exchangers.
  • Identifiant de la fiche : 30016638
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 90
  • Date d'édition : 05/11/2015
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2015.07.002

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