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Document IIF

Coefficients de transfert de chaleur lors de l'ébullition libre des frigorigènes hydrocarbures sur divers tubes à surface augmentée.

Pool boiling heat transfer coefficients of hydrocarbon refrigerants on various enhanced tubes.

Auteurs : PARK H. S., PARK K. J., JUNG D.

Résumé

In this work, pool boiling heat transfer coefficients (HTCs) of five hydrocarbon refrigerants of propylene, propane, isobutane, butane and dimethylether (DME) were measured at the liquid temperature of 7% on a 26fpi low fin tube, Turbo-B, and Thermoexcel-E tubes. All data were taken from 80 to 10 kW/m2 in the decreasing order of heat flux. Hydrocarbon refrigerants' data showed a typical trend that nucleate boiling HTCs obtained on enhanced tubes also increase with the vapour pressure. Fluids with lower reduced pressure such as DME, isobutane, and butane took more advantage of the heat transfer enhancement mechanism of enhanced tubes than those with higher reduced pressure such as propylene and propane. Finally, Thermoexcel-E showed the highest heat transfer enhancement ratios of 2.3-9.4 among the tubes tested due to its sub-channels and re-entrant cavities.

Documents disponibles

Format PDF

Pages : ICR07-B1-494

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 : Pool boiling heat transfer coefficients of hydrocarbon refrigerants on various enhanced tubes.
  • Identifiant de la fiche : 2008-0089
  • Langues : Anglais
  • Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Date d'édition : 21/08/2007

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