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Caractéristiques de transfert de chaleur et de masse d’un couple charbon actif moulé/méthanol pour le froid à adsorption.

Heat and mass transfer characteristics of a molded activated carbon/methanol pair for adsorption cooling.

Numéro : pap. n. 603

Auteurs : SHIBATA C., KODAMA A., HIGASHI H., et al.

Résumé

Using alkali activated carbon fiber and powder with a large specific area of around 3000 m2 g-1 as starting material, we prepared a molded adsorbent with a small amount of polytetrafluoroethylene (PTFE) binder for adsorption cooling by a mechanical compression at ordinary temperature. PTFE nanofibers played an important role in the retention of the shape of the molded adsorbent. Adsorption equilibria of methanol vapor on the prepared high-density activated carbons (HDACs) were found to be expressed by the Dubinin-Astakhov equation. Experimental results showed that the denser HDAC rapidly adsorbed methanol vapor, and heat of adsorption was earlier removed. The temporal changes in the methanol uptake and the temperature of HDACs could be estimated through numerical analysis based on a one-dimensional heat and mass transfer model. Therefore, the prepared compression-molded activated carbon would be a promising material for adsorption cooling, and the established calculation model would aid the design of molded adsorbents.

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Pages : 8

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Détails

  • Titre original : Heat and mass transfer characteristics of a molded activated carbon/methanol pair for adsorption cooling.
  • Identifiant de la fiche : 30026459
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0603

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