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Une corrélation générale pour un flux de chaleur critique dans des canaux horizontaux.

A general correlation for critical heat flux in horizontal channels.

Auteurs : SHAH M. M.

Type d'article : Article, Article de la RIF

Résumé

While horizontal channels are widely used in heat exchangers involving boiling, no well-verified method for predicting CHF (critical heat flux) in them is available. Presented here is a general correlation for CHF in horizontal channels. It provides the ratio of CHF in horizontal channels to CHF in vertical channels. It has been verified with a very wide range of test data that include 10 fluids (water, refrigerants, and hydrocarbons) in single channels and multi-channels of diameters 0.13–24.3?mm, reduced pressures from 0.005 to 0.9, mass flux from 20 to 11,390?kg/m2s, inlet qualities from -1.05 to 0.72, and critical qualities from -0.2 to 0.99. Data include uniform and non-uniform heat fluxes. With CHF for vertical channels calculated by the author's published correlation, it predicts 878 data points from 39 data sets from 18 sources with a mean absolute deviation of only 15.4%. The new correlation is presented and other predictive techniques are also discussed.

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Format PDF

Pages : 37-52

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 : A general correlation for critical heat flux in horizontal channels.
  • Identifiant de la fiche : 30016315
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 59
  • Date d'édition : 11/2015

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