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Caractéristiques de transfert de chaleur après l'assèchement dans les minitubes horizontaux et une méthode de prévision pour l'ébullition en écoulement du CO2.

Post-dryout heat transfer characteristics in horizontal minitubes and a prediction method for flow boiling of CO2.

Auteurs : YUN R., KIM Y.

Type d'article : Article, Article de la RIF

Résumé

The post-dryout heat transfer coefficients were analyzed by differentiating them into two regions, based on their observed trends. One is a transition region. The other is a fully dryout region. The effects of test conditions for heat flux and saturation temperature on the boundaries of the two regions were also investigated, and the existing models for post-dryout heat transfer coefficients were verified for both regions. To develop a prediction method for flow boiling of CO2, the authors applied the critical liquid film model, to predict the point of dryout vapour quality. The Yun et al. model and the Groeneveld model are used to estimate the heat transfer coefficients prior to and subsequent to the point of dryout vapour quality, respectively. The former shows a mean deviation of 38%, and the latter gives 36.4% for the three different data sources.

Documents disponibles

Format PDF

Pages : 1085-1091

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Post-dryout heat transfer characteristics in horizontal minitubes and a prediction method for flow boiling of CO2.
  • Identifiant de la fiche : 2009-1482
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 5
  • Date d'édition : 08/2009

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