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La condensation à l'intérieur de tubes horizontaux. 1e partie. Configuration de l'écoulement diphasique.

Condensation in horizontal tubes. Part I. Two-phase flow pattern map.

Auteurs : HAJAL J. el, THOME J. R., CAVALLINI A.

Type d'article : Article

Résumé

A new flow pattern map and flow pattern based heat transfer model for condensation inside horizontal plain tubes are proposed in this two-part article. In Part I, a new version of a two-phase flow pattern map, originally developed by Kattan et al. for flow boiling, is presented for condensation inside horizontal tubes while a new heat transfer model is presented in Part II. The new flow pattern map incorporates a newly defined logarithmic mean void fraction (LM epsilon) method for calculation of vapour void fractions spanning from low pressures up to pressures near the critical point. Several other modifications that are appropriate for condensation as opposed to evaporation are also made. In the absence of void fraction data at high reduced pressures for these conditions, the new LM epsilon method was indirectly validated using the convective condensation model for annular flow and corresponding heat transfer test data at reduced pressures up to 0.8.

Détails

  • Titre original : Condensation in horizontal tubes. Part I. Two-phase flow pattern map.
  • Identifiant de la fiche : 2004-0521
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 18
  • Date d'édition : 08/2003

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