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Effet des conditions de régénération sur le procédé de déshumidification à adsorption dans les lits fixes à gel de silice.

Effect of regeneration conditions on the adsorption dehumidification process in packed silica gel beds.

Auteurs : CHANG K. S., WANG H. C., CHUNG T. W.

Type d'article : Article

Résumé

The objective of the study was to evaluate commercial silica gel and silica gel with improved transport properties used in the adsorption dehumidification process. The effects of the regeneration temperature and the regeneration time were observed. The dynamic adsorption experiments were conducted to measure the moisture breakthrough curves of the silica gels, and the moisture uptakes on the silica gels were calculated from the breakthrough curves. A temperature controlled heat source was used to carry out the regeneration of silica gels. Since solar energy with low energy density was applied to regenerate the adsorption dehumidification systems frequently, temperature of the heat source was controlled to remain under 100 °C. Since the switch of the absorption process to the regeneration process is selected at the breakpoint usually, the effective uptake defined in this study is calculated from the initial to the breakpoint at a ratio of the effluent concentration to the initial concentration of 0.15. Similar effective uptakes of the system using modified silica gels regenerated at 90 °C for 0.5 h and the system using commercial silica gels for 3 h regeneration were found. Compared to the system using commercial silica gels, the system using modified silica gels enables good energy saving in regeneration.

Détails

  • Titre original : Effect of regeneration conditions on the adsorption dehumidification process in packed silica gel beds.
  • Identifiant de la fiche : 2004-2223
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 24 - n. 5-6
  • Date d'édition : 04/2004

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