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Air-side heat transfer and pressure drop in spiral wire-on-tube condensers.

Transfert de chaleur côté air et chute de pression dans les condenseurs à tube et fils en spirale.

Numéro : pap. ID: 156

Auteurs : SIGWALT R. A., BARBOSA J. R. Jr, MELO C.

Résumé

The air-side thermal-hydraulic performance of spiral wire-on-tube condensers is investigated experimentally in this paper. Sixteen prototypes were manufactured and tested in an open-loop wind tunnel calorimeter. The influence of the following geometrical parameters was evaluated: the number of tube passes, the radial and longitudinal tube spacings and the wire spacing. Measurements of the air-side thermal conductance and pressure drop were carried out for air flow rates ranging from 70 to 220 m3/h. The data were correlated using empirical relationships for the Colburn j-factor and the Darcy friction factor. The agreement with the experimental data presented absolute average deviations of 2.8% for the heat transfer rate and 4.8% for the pressure drop. A quantitative analysis is presented to provide the most viable configuration from the point of view of its application in a domestic refrigerator.

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Pages : 8 p.

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Détails

  • Titre original : Air-side heat transfer and pressure drop in spiral wire-on-tube condensers.
  • Identifiant de la fiche : 30001578
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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