Partager

Document IIF

Analyse expérimentale de la performance et modélisation de systèmes de refroidissement à déshydratant liquide utilisés pour le conditionnement d'air résidentiel.

Experimental performance analysis and modelling of liquid desiccant cooling systems for air conditioning in residential buildings.

Auteurs : PIETRUSCHKA D., EICKER U., HUBER M., et al.

Type d'article : Article, Article de la RIF

Résumé

The paper presents a new desiccant cooling cycle to be integrated in residential mechanical ventilation systems. The process shifts the air treatment completely to the return air side, so that the supply air can be cooled by a heat exchanger. Purely sensible cooling is an essential requirement for residential buildings with no maintenance guarantee for supply air humidifiers. As the cooling power is generated on the exhaust air side, the dehumidification process needs to be highly efficient to provide low supply air temperatures. Solid rotating desiccant wheels have been experimentally compared with liquid sorption systems using contact matrix absorbers and crossflow heat exchangers. The best dehumidification performance at no temperature increase was obtained in an evaporatively cooled heat exchanger with sprayed lithium chloride solution. Up to 7 g/kg dehumidification could be reached in an isothermal process, although the surface wetting of the first prototype was low. The process then provides inlet air conditions below 20 °C for the summer design conditions of 32 °C, 40% relative humidity. With air volume flow rates of 200 m3/h the system can provide 886 W of cooling power. A theoretical model for both the contact absorber and the crossflow system has been developed and validated against experimental data for a wide range of operating conditions. A simulation study identified the optimisation potential of the system, if for example the surface wetting of the liquid desiccant can be improved.

Documents disponibles

Format PDF

Pages : 110-124

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 : Experimental performance analysis and modelling of liquid desiccant cooling systems for air conditioning in residential buildings.
  • Identifiant de la fiche : 2006-0937
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 1
  • Date d'édition : 01/2006

Liens


Voir d'autres articles du même numéro (15)
Voir la source

Indexation