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Mesure précise du coefficient de transfert de chaleur lors de la décongélation à l'aide d'un jet incident : une méthode inverse.

Effective heat transfer coefficient measurement during air impingement thawing using an inverse method.

Auteurs : ANDERSON B. A., SINGH R. P.

Type d'article : Article, Article de la RIF

Résumé

Convective heat transfer coefficient is a critical parameter in analyzing heating systems. When air impingement technology is applied to the thawing of frozen foods, the resulting effective heat transfer coefficient becomes quite complicated. The airflow from impingement jets results in heat transfer coefficients that vary with position. In addition, transient thawing results in effective heat transfer coefficients that vary with time and surface temperature. Effective heat transfer coefficients as a function of position and surface temperature were determined using an inverse method for thawing from a single impingement jet. Regularization parameters used in this inverse method were determined using simulated data. Effective heat transfer coefficients tended to increase with time as thawing progressed. Heat transfer coefficients decreased radically, but exhibited secondary maxima at radical distances approximately equal to the nozzle diameter. This inverse method enables the estimation of the heat transfer coefficient as a function of both time and position.

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Format PDF

Pages : 281-293

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Détails

  • Titre original : Effective heat transfer coefficient measurement during air impingement thawing using an inverse method.
  • Identifiant de la fiche : 2006-1296
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 2
  • Date d'édition : 03/2006

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