Partager

Document IIF

Prévision du comportement thermique des parois des chambres froides à l'aide de modèles utilisant des paramètres groupés ou distribués.

Prediction of the dynamic thermal behaviour of walls for refrigerated rooms using lumped and distributed parameter models.

Auteurs : ESTRADA FLORES S., CLELAND A. C., CLELAND D. J.

Type d'article : Article, Article de la RIF

Résumé

Physically realistic lumped and distributed parameter models were used to represent one-dimensional heat conduction through the layers of solid conducting walls in low temperature applications. A range of feasible models with differing complexity for representing the thermal resistance of thermal capacitance each of concrete, concrete-insulation-concrete and concrete-insulation-metal type walls was investigated by comparison of simulated dynamic behaviour to predictions by a finite element model programme, which was itself validated, by comparison, to experimental data for wall systems. Model evaluation measures to aid engineering judgement in selecting appropriate wall models for particular applications are presented. Only resistance needs to be considered for accurate prediction of mean heat flux entering a room, regardless of the wall modelled. It is recommended that metal layers be represented by capacity only models, thin insulation layers by resistance only models, thicker insulation layers by lumped or fully distributed models, and concrete layers by lumped or fully distributed models. The recommended number of zones for a lumped model is twice the number used in a distributed model. An eyen distribution, of thermal resistance and capacity between zones in lumped parameter models is recommended.

Documents disponibles

Format PDF

Pages : 272-284

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 : Prediction of the dynamic thermal behaviour of walls for refrigerated rooms using lumped and distributed parameter models.
  • Identifiant de la fiche : 2001-1745
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 24 - n. 3
  • Date d'édition : 05/2001

Liens


Voir d'autres articles du même numéro (6)
Voir la source

Indexation