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Document IIF

Études théoriques et expérimentales sur les caractéristiques d'adsorption et de désorption isothermes d’un échangeur de chaleur enrobé de déshydratant.

Theoretical and experimental studies on isothermal adsorption and desorption characteristics of a desiccant-coated heat exchanger.

Auteurs : HIGASHI T., ZHANG L., SAIKAWA M., et al.

Type d'article : Article, Article de la RIF

Résumé

Dynamic characteristics of desiccant–coated heat exchangers (DCHEs) were experimentally measured by wind tunnel. The surface of the DCHE was coated with polymer sorbent desiccant. The isothermal adsorption and desorption experiments were conducted under the condition where the temperatures of the air and brine passing through the DCHE were identical.
The experimental results were compared to that obtained from theoretical calculations. A diffusion model predicting the distribution of moisture concentration and temperature in the desiccant layer was introduced. The equivalent diffusion coefficient of the water inside the desiccant layer was determined from the experimental results.
The adsorption and desorption speeds were at the maximum values at the beginning of the sorption processes, and then they gradually decreased. The equivalent diffusion coefficient was dependent on the temperature. Assuming the temperature dependence of the diffusion coefficient, the calculated sorption performance correlated well with that obtained from the experimental results.

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Format PDF

Pages : 228-237

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 : Theoretical and experimental studies on isothermal adsorption and desorption characteristics of a desiccant-coated heat exchanger.
  • Identifiant de la fiche : 30022536
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 84
  • Date d'édition : 12/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.09.007

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