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Document IIF

Étude expérimentale du transfert de chaleur par condensation du R-404A dans des tubes enroulés en hélice.

Experimental study of condensation heat transfer of R-404A in helically coiled tubes.

Auteurs : REZA SALIMPOUR M., SHAHMORADI A., KHOEINI D.

Type d'article : Article, Article de la RIF

Résumé

In this research, the heat transfer coefficients of R-404A vapor condensation inside helically coiled tubes are studied, experimentally. The effects of different coil pitches and curvature radii at different vapor qualities and mass velocities are considered. The vapor is condensed inside the helically coiled tubes by transferring heat to the cooling water flowing in annulus. Results show that the coil diameter has significant effect on condensation heat transfer coefficient. By decreasing the coil diameter or increasing the Dean number, the heat transfer coefficient is increased as the highest value is obtained at curvature radius of 4.35 cm which is 45% greater than the corresponding figure of curvature radius of 7.65 cm at mass velocity of 125 kg m-2s-1. Also, at low vapor qualities, the coil pitch effect is more pronounced. Finally, based on the results, a new correlation is developed to evaluate the condensation heat transfer coefficient of R-404A inside helically coiled tubes.

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Format PDF

Pages : 582-589

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  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Experimental study of condensation heat transfer of R-404A in helically coiled tubes.
  • Identifiant de la fiche : 30020587
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 74
  • Date d'édition : 02/2017

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