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Comparaison thermodynamique des refroidisseurs portables thermoélectriques, Stirling et à compression de vapeur.

Thermodynamic comparison of thermoelectric, Stirling, and vapor compression portable coolers.

Numéro : pap. ID: 113

Auteurs : HERMES C. J. L., BARBOSA J. R. Jr

Résumé

The present study compares the thermodynamic performance of four small-capacity portable coolers that employ different cooling technologies: thermoelectric, Stirling, and vapor compression using two different compressors (reciprocating and linear). The refrigeration systems were experimentally evaluated in a climatized chamber with controlled temperature and humidity. Tests were carried out at two different ambient temperatures (21 and 32°C) in order to obtain key performance parameters of the systems (e.g., power consumption, cooling capacity, internal air temperature, and the hot end and cold end temperatures). The energy performance parameters of the systems were compared using a thermodynamic approach that splits the overall 2nd law efficiency into two terms, namely, the internal and external efficiencies. In doing so, the internal irreversibilities (e.g., friction in the working fluid in the Stirling and vapor compression machines, Joule heating and heat conduction in the thermoelectric devices of the Peltier cooler) were separated from the heat exchanger losses (external irreversibilities), allowing the comparison between different refrigeration technologies with respect to the same thermodynamic baseline.

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Pages : 8 p.

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Détails

  • Titre original : Thermodynamic comparison of thermoelectric, Stirling, and vapor compression portable coolers.
  • Identifiant de la fiche : 30001558
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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