Partager

Document IIF

Corrélations du transfert de chaleur lors de la condensation convective pour les frigorigènes purs et mélangés à l'intérieur de tubes horizontaux à micro-ailettes.

Convective condensation heat transfer correlations for pure and blended refrigerants in horizontal microfin tubes.

Auteurs : KUKREJA R., JAIN S., AGARWAL R. S.

Résumé

Tube side condensation is important in air conditioning, automobile and various process industries applications. The phasing out of traditional CFC refrigerants due to their high ozone depletion potential (ODP) has led to the use of blended zeotropic refrigerants. Some of these blended refrigerants with almost negligible ODP exhibit heat transfer degradation in tubes during in-tube condensation due to additional thermal resistance of mass transfer and nonlinear property effects. The modern condensers are expected to be compact, with low refrigerant hold up and weight, implying smaller and thinner tubes. Enhanced tube geometries are the key to move in this direction. Microfin tubes with different geometrical parameters are now widely being used in condensers, evaporators and coolers of various unitary air conditioning systems. These tubes give significant increase in heat transfer with relatively less pressure drop penalty. This paper provides a comprehensive review of various heat transfer correlations proposed by different authors for the condensation of pure and blended refrigerants in smooth and micro fin tubes. A new empirical correlation based on two phase multiplier approach using the experimental data of various researchers has been proposed. The correlation predicts the local heat transfer coefficient for pure and blended refrigerants in horizontal micro fin tubes within plus or minus 15% range.

Documents disponibles

Format PDF

Pages : ICR07-E1-968

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 : Convective condensation heat transfer correlations for pure and blended refrigerants in horizontal microfin tubes.
  • Identifiant de la fiche : 2008-0547
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Date d'édition : 21/08/2007

Liens


Voir d'autres communications du même compte rendu (839)
Voir le compte rendu de la conférence

Indexation