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Document IIF

Caractéristiques du transfert de chaleur au cours de la fusion des coulis de glace dans des échangeurs de chaleur à plaques compacts.

Heat transfer characteristics of melting ice slurries in compact plate heat exchangers.

Auteurs : STAMATIOU E., KAWAJI M.

Résumé

The work was aimed at studying the melting heat transfer characteristics of ice slurries in compact plate heat exchangers that entail simultaneously developing thermal and hydrodynamic flow conditions in flat duct geometries over practical ranges. In particular, local measurements of ice slurry melting heat transfer were conducted in a vertical flat-plate heat exchanger heated from one side for Reynolds number from 2100 to 11,000, ice slurry velocities of 0.06 to 0.90 m/s, average weight ice fractions from 0 to 24%, and two different constant wall heat flux conditions. The local ice slurry melting heat transfer results represented by the Nusselt number were shown to be greater near the entrance of the heat exchanger as the flow is not developed, and decreased towards the exit. The average ice slurry Nusselt numbers evaluated using the liquid properties were shown to be higher than the values for single-phase brine flow and increased as the ice fraction and Reynolds number increased. For the lower Reynolds number ranges investigated, the ice slurry Nusselt numbers were shown to slightly depend on the wall heat flux. The effect of ice fraction on the average Nusselt number was more profound at the lower Reynolds number ranges.

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Détails

  • Titre original : Heat transfer characteristics of melting ice slurries in compact plate heat exchangers.
  • Identifiant de la fiche : 2004-1091
  • Langues : Anglais
  • Source : 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Date d'édition : 17/08/2003

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