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Experimental comparison of the sorption and refrigerating performances of a CaCl2 impregnated composite adsorbent and those of the host silica gel.

Author(s) : DAOU K., WANG R. Z., XIA Z. Z., et al.

Type of article: Article, IJR article

Summary

In this paper, the adsorption and refrigerating performances of a composite adsorbent and its host microporous silica gel matrix are investigated comparatively in which water is used as refrigerant. The composite adsorbent is developed by impregnating the silica gel with calcium chloride. A lab-scale single-bed adsorption chiller system, functioning without any valve on its refrigerant circuit, is designed and used as test rig. The mass ratio, defined as the ratio of the specific cooling power of composite adsorbent to that of silica gel, is found to be higher than 2, while the COP has been improved by 25%, in average. The composite adsorbent has been tested to have, not only the capacity of adsorbing water vapour more than twice as much as the silica gel does, but also, kinetically, to adsorb and desorb faster. The cycled amounts of refrigerant, calculated from measured isobaric adsorption levels, further show that the composite adsorbent can be regenerated at lower temperatures, with respect to silica gel.

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Pages: 68-75

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Details

  • Original title: Experimental comparison of the sorption and refrigerating performances of a CaCl2 impregnated composite adsorbent and those of the host silica gel.
  • Record ID : 2006-2903
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 1
  • Publication date: 2007/01

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