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Études de la sensibilité d'une tour de refroidissement direct à basse température pour les systèmes de refroidissement d'immeubles par rayonnement.

Sensitivity studies of a low temperature low approach direct cooling tower for building radiant cooling systems.

Numéro : pap. 3529

Auteurs : NASRABADI M., FINN D. P., COSTELLOE B.

Résumé

Recent interest in cooling towers as a mechanism for producing chilled water, together with the evolution of radiant cooling, have prompted a review of evaporative cooling in temperate maritime climates. The thermal efficiency of such systems is a key parameter, as a measure of the degree to which the system has succeeded in exploiting the cooling potential of the ambient air. The feasibility of this concept depends largely however, on achieving low approach water temperatures within an appropriate cooling tower, at acceptable levels of energy performance. Previous experimental work for a full scale evaporative cooling system has shown that it is possible to produce cooling water at low process approach conditions (1-3 K), at the higher temperatures required in radiant and displacement systems (14-18 °C), with varying levels of annual availability in different temperate climate locations. For such conditions, evaporative cooling has the potential to offer an alternative approach for producing chilled water, particularly in temperate climates, where conventional mechanical air-conditioning systems can, for certain buildings, be considered to be an over engineered solution but where passive cooling is insufficient to offset cooling loads. The current paper describes the development of a mathematical model which analyses the behavior of a low approach open evaporative cooling tower. The model is used to carry out a series of sensitivity studies assessing the performance of the cooling tower subject to various weather and climatic boundary conditions.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Sensitivity studies of a low temperature low approach direct cooling tower for building radiant cooling systems.
  • Identifiant de la fiche : 30006819
  • Langues : Anglais
  • Source : 2012 Purdue Conferences. 2nd International High Performance Buildings Conference at Purdue.
  • Date d'édition : 16/07/2012

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