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Un modèle mathématique pour le refroidissement d'air d'un immeuble à l'aide d'un matelas dispersant.

A mathematical model for supplying air-cooling for a building using a packed bed.

Auteurs : MAREWO G. T., HENWOOD D. J.

Type d'article : Article

Résumé

The cooling system at the Harare International School uses a packed bed system for storing the coldness of the night-time to be used later for day-time air-conditioning. A two-phase mathematical model is described for the packed bed which includes heat dispersion in the fluid, and heat loss to the environment. This is in contrast to other studies, where at least one of these terms is neglected to simplify the mathematical model. A numerical method for obtaining a solution is proposed and implemented. Using measured inlet temperatures, the measured and predicted outlet temperatures of the bed show good trend agreement. The differences in detail are examined through sensitivity analyses for both the heat convection transfer and air velocity. It is apparent that adjusting these parameters can increase the agreement between the predicted and measured data. A parametric study for heat storage with various materials and bed sizes is given, which indicates how the code may be used as a tool for improving design and operational parameters.

Détails

  • Titre original : A mathematical model for supplying air-cooling for a building using a packed bed.
  • Identifiant de la fiche : 2006-2032
  • Langues : Anglais
  • Source : Build. Serv. Eng. Res. Technol. - vol. 27 - n. 1
  • Date d'édition : 2006

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