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Expériences sur le transfert de chaleur dans les évaporateurs des systèmes frigorifiques fonctionnant avec des nouveaux fluides et corrélations de données.

Experiments on heat transfer in evaporators for refrigerating plants working with new fluids and data correlation.

Auteurs : DISPENZA C., LA ROCCA V., PANNO G.

Résumé

In past years DREAM developed a new correlation methodology of heat transfer data, during boiling flow in diabatic pipes and channels, founded on a suitable hydrodynamic model for poly-phase flow and including suitable dimensionless parameters based on the extended Colburn analogy. A wide data bank of heat transfer data derived from literature papers has been correlated with a very high correlation coefficient (0.85-0.97) both for pure fluids and fluid mixtures. The methodology is very reliable but it is complex when it is applied for predictive purpose in design of a real system. A simple test rig was built recently in the DREAM Laboratory of Refrigerating Engineering for test runs with new refrigerant fluids. The paper gives a presentation of some results obtained, working with R-404A with the aim to built a simpler formulation of the DREAM correlation suitable for the technical world.

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Format PDF

Pages : ICR07-B2-876

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    20 €

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Détails

  • Titre original : Experiments on heat transfer in evaporators for refrigerating plants working with new fluids and data correlation.
  • Identifiant de la fiche : 2008-0550
  • 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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