Partager

Document IIF

Mesurage du taux d’adsorption/désorption isotherme de vapeur d’eau utilisant la méthode QCM et de sa résistance au transfert de masse d’une couche revêtue de microparticules de gel de silice dans un air humide.

Measuring of isothermal water vapor adsorption/desorption rate using QCM method and its mass transfer resistance of a layer coated with silica-gel micro particles in a moist air.

Auteurs : HAMAMOTO Y., NAKAMORI T., MORI H.

Type d'article : Article, Article de la RIF

Résumé

A quartz crystal microbalance (QCM) technique was used to measure amounts of adsorbed and desorbed water vapor in a moist air to a thin layer of adsorbent consolidated with silica-gel micro particles on the quartz crystal coated with thin gold electrodes. First, measured relative isothermal equilibrium adsorption was confirmed to reproduce the catalogue data of the silica gel. Then, the adsorption and desorption rates to the layer were measured under a condition of a step change of the surrounding relative humidity. Overall mass transfer resistance which related to both the mass diffusion in the particle and the mass transfer in the boundary layer was revealed by the obtained time constants of these reactions. The resistance decreased with the increase of the velocity, and it became a negligible quantity in the bound- ary layer when the flow rate was above 0.1 m s -1 . Finally, correlations were proposed to predict these resistances.

Documents disponibles

Format PDF

Pages : 11-18

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 : Measuring of isothermal water vapor adsorption/desorption rate using QCM method and its mass transfer resistance of a layer coated with silica-gel micro particles in a moist air.
  • Identifiant de la fiche : 30026899
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 105
  • Date d'édition : 09/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.03.003

Liens


Voir d'autres articles du même numéro (18)
Voir la source

Indexation