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Évaluation de la possibilité d’utiliser un mélange éthanol/eau comme frigorigène dans un système de refroidissement par adsorption en utilisant un adsorbant composite de charbon actif et de chlorure de sodium.

Evaluating the potential of using ethanol/water mixture as a refrigerant in adsorption cooling system by using activated carbon - sodium chloride composite adsorbent.

Auteurs : DZIGBOR A., CHIMPHANGO A.

Type d'article : Article, Article de la RIF

Résumé

Thermal properties and adsorbent - refrigerants compatibility, influence heat and mass transfer dynamics in adsorption cooling systems (ACS). Activated carbon (AC)?+?NaCl (10–35.7% w/v) composite adsorbents were paired with either high purity (99.7%) or low-grade ethanol (60% ethanol/ 40% water) refrigerants to assess the potential of ethanol/water mixture as a refrigerant. The ACS with activated carbon-sodium chloride (AC?+?NaCl) composites adsorbent had a coefficient of performance and specific cooling power of up to 0.091 and 79 W kg-1, respectively, when paired with high purity ethanol, which increased to about 0.146 and 150 W kg-1, respectively, when paired with low-grade ethanol. About 16–25?MJ per cycle was needed for evaporation of refrigerants in AC?+?NaCl composites adsorbent when paired with the low-grade ethanol, whereas more energy, 27?MJ per cycle, was required to evaporate low-grade ethanol when paired with unmodified AC in ACS. The study has shown that the thermal and mass transfer performances of AC?+?NaCl composites adsorbents superseded that of unmodified AC providing the potential for low-grade ethanol to be used as a potential alternative refrigerant in ACS especially in areas where pure ethanol is limited.

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Format PDF

Pages : 132-142

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    20 €

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Détails

  • Titre original : Evaluating the potential of using ethanol/water mixture as a refrigerant in adsorption cooling system by using activated carbon - sodium chloride composite adsorbent.
  • Identifiant de la fiche : 30025354
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 97
  • Date d'édition : 01/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2018.09.025

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