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Corrélations pour le transfert de chaleur, la chute de pression de solutions glycol-eau et l'écoulement d'air dans des échangeurs de chaleur à microcanaux.

Correlations for heat transfer and pressure drop of glycol-water and air flows in minichannel heat exchangers.

Auteurs : JOKAR A., HOSNI M. H., ECKELS S. J.

Résumé

The thermo-hydrodynamic performance of three different minichannel heat exchangers of an automotive air conditioning system is studied and discussed in this paper. It proposes semi-empirical correlations for the heat transfer and pressure drop for the glycol-water flow within the minichannels and airflow through the louvered fin surfaces. The uncertainty estimates for the measured and calculated parameters are also presented. The results for the glycol-water heat transfer and pressure drop are plotted, discussed, and compared with the relevant studies. The results show that the Nusselt number of the glycol-water flow within the minichannels continue to increase with Reynolds number, even at low Reynolds numbers (less than 1000), due to application of unique surface enhancements within the minichannels.

Détails

  • Titre original : Correlations for heat transfer and pressure drop of glycol-water and air flows in minichannel heat exchangers.
  • Identifiant de la fiche : 2006-2890
  • Langues : Anglais
  • Source : ASHRAE Transactions. 2005 Annual Meeting, Denver, Colorado, USA. Volume 111, part 2 + CD-ROM.
  • Date d'édition : 2005

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