Partager

Document IIF

Modèles CPWTR unidimensionnels fiables pour les gaines bidimensionnelles isolées polygonales.

Reliable one-dimensional CPWTR models for two-dimensional insulated polygonal ducts.

Auteurs : WONG K. L., JUMAILY A. al-, CHEN W. L., et al.

Type d'article : Article, Article de la RIF

Résumé

The heat transfer characteristics of various insulated long polygonal ducts are analyzed using one-dimensional plane wedge thermal resistance (PWTR) and plate thermal resistance (PTR) models. It is found that errors generated by the PWTR model are all positive and those generated by the PTR model are all negative. Thus, the combined plate wedge thermal resistance (CPWTR) model generated by implementing PWTR and PTR models and equating the proportion factors can neutralize the positive and negative errors and generate reasonably accurate results when compared with the two-dimensional numerical analysis. Most errors generated by the one-dimensional CPWTR model are within plus or minus 1% for practical sizes and insulated thickness for air-conditioning and refrigeration applications. Meanwhile, the PTR model can be used to estimate accurately the maximum or minimum surface temperatures, respectively, with hot or cold fluids inside an insulated triangular, rectangular or pentagonal duct.

Documents disponibles

Format PDF

Pages : 254-266

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Reliable one-dimensional CPWTR models for two-dimensional insulated polygonal ducts.
  • Identifiant de la fiche : 2007-0106
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 2
  • Date d'édition : 03/2007

Liens


Voir d'autres articles du même numéro (17)
Voir la source

Indexation