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Études expérimentales détaillées sur la chute de pression frictionnelle du R134a lors de l'ébullition en écoulement dans un canal de 5 mm de diamètre : influence de la composante d'accélération de la chute de pression.

Detailed experimental investigations on frictional pressure drop of R134a during flow boiling in 5?mm diameter channel: The influence of acceleration pressure drop component.

Auteurs : MUSZYNSKI T., ANDRZEJCZYK R., DORAO C. A.

Type d'article : Article, Article de la RIF, Étude de cas

Résumé

This article presents detailed two-phase diabatic pressure drop data for refrigerant R134a at a saturation pressure of 5.5 bar corresponding to the saturation temperature of 19.4?°C. Study cases have been set for a mass flux varying from 100 to 500?kg?m-2?s-1. The obtained data are used as a validation of the void fraction literature models, a set of graphs shows comparisons, for a representative set of experimental conditions, of the two-phase frictional pressure gradients for the adiabatic and diabatic flow. Verification of the acceleration pressure drop predictions for two-phase adiabatic flow showed that all correlations predict that over 60% of experimental data fit in the range of ±30%. The model proposed in this article predicts 63% of presented data within 10% error, and 96% of the data are predicted within 30% error.

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Pages : 163-173

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Détails

  • Titre original : Detailed experimental investigations on frictional pressure drop of R134a during flow boiling in 5?mm diameter channel: The influence of acceleration pressure drop component.
  • Identifiant de la fiche : 30022289
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 82
  • Date d'édition : 10/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.05.029

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