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Document IIF

Prévision numérique des propriétés de givrage et de la performance d'un échangeur de chaleur à tubes à ailettes avec des ailettes lisses sous conditions de givrage.

Numerical prediction of frost properties and performance of fin-tube heat exchanger with plain fin under frosting.

Auteurs : HWANG J., CHO K.

Type d'article : Article, Article de la RIF

Résumé

The present study predicted and verified the local frost thicknesses, blockage ratio, and local and total heat transfer rates of a fin-tube heat exchanger under standard and high frosting conditions. Local frost properties were predicted for each segment. The reduction of air volume flow rate and local different air velocities in the segment were obtained by applying ?P–V?a curve and the maximum frost thickness. The local heat transfer rate was predicted by using the ?-NTU method and local average frost thickness. The predicted maximum frost thicknesses showed a deviation of 5.5% from the measured values. Maximum frost thicknesses immediately after each U-bend were thicker than those immediately before each U-bend. The predicted blockage ratios agreed with the measured data within 10%. Non-uniform profiles of the local heat transfer rates of heat exchanger under frosting condition were property predicted. The predicted total heat transfer rate agreed with the measured data within 6%.

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Format PDF

Pages : 59-68

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    20 €

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Détails

  • Titre original : Numerical prediction of frost properties and performance of fin-tube heat exchanger with plain fin under frosting.
  • Identifiant de la fiche : 30012261
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 46
  • Date d'édition : 10/2014

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