• Accueil
  • Publications

  • Effect of liquid/vapour maldistribution on the ...

Document IIF

Effect of liquid/vapour maldistribution on the performance of plate heat exchanger evaporators.

Effet de la mauvaise distribution liquide/vapeur sur la performance d'évaporateurs à échangeur de chaleur à plaques.

Numéro : pap. n. 550

Auteurs : JENSEN J. K., KÆRN M. R., OMMEN T., et al.

Résumé

Plate heat exchangers are often applied as evaporators in industrial refrigeration and heat pump systems. In the design and modelling of such heat exchangers the flow and liquid/vapour distribution is often assumed to be ideal. However, maldistribution may occur and will cause each channel to behave differently due to the variation of the mass flux and vapour quality. To evaluate the effect of maldistribution on the performance of plate heat exchangers, a numerical model is developed in which the mass, momentum and energy balances are applied individually to each channel, including suitable correlations for heat transfer and pressure drop. The flow distribution on both the refrigerant and secondary side is determined based on equal pressure drop while the liquid/vapour distribution is imposed to the model. Results show that maldistribution may cause up to a 25 % reduction of the overall heat transfer coefficient, compared to a lumped model with uniform distribution.

Documents disponibles

Format PDF

Pages : 8 p.

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 : Effect of liquid/vapour maldistribution on the performance of plate heat exchanger evaporators.
  • Identifiant de la fiche : 30016055
  • Langues : Anglais
  • Source : Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Date d'édition : 16/08/2015
  • DOI : http://dx.doi.org/10.18462/iir.icr.2015.0550

Liens


Voir d'autres communications du même compte rendu (657)
Voir le compte rendu de la conférence