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Fusion des coulis de glace et transfert de chaleur dans un tube annulaire.

Melting of ice slurry in a tube-in-tube heat transfer coil.

Auteurs : PRONK P., INFANTE FERREIRA C. A., WITKAMP G. J.

Résumé

One of the main components of a closed ice slurry system is the melting heat exchanger, in which ice slurry absorbs heat resulting in the melting of ice crystals. Design calculations of melting heat exchangers are mainly based on the heat transfer coefficient and pressure drop data, but experiments presented in this paper show that superheating of ice slurry at the outlet of the heat exchangers should also be considered. An experimental study with a tube-in-tube heat transfer coil is carried out to find out the effect of ice slurry velocity, heat flux, ice fraction, and ice crystals size on these design parameters. Especially, the influence of the crystal size is important for practical applications since the average crystal size increases during storage because of Ostwald ripening. The experimental results presented in this paper show that low ice fractions and big ice crystals cause high degrees of superheating and that measured heat transfer coefficients decrease at low ice fractions and increased at higher fractions, and are neither influenced by heat flux nor ice crystal size.

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Pages : 2004-2

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Détails

  • Titre original : Melting of ice slurry in a tube-in-tube heat transfer coil.
  • Identifiant de la fiche : 2005-2584
  • Langues : Anglais
  • Source : Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
  • Date d'édition : 01/08/2004

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