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Conception et analyse d'un refroidisseur de bouteilles au R-744 transcritique.

Design and analysis of a transcritical R-744 bottle cooler.

Auteurs : CECCHINATO L., CORRADI M., FORNASIERI E., et al.

Résumé

This paper presents a project to develop a R-744 commercial single door bottle cooler that is cost competitive and matches the performance of typical cost optimised R-404A system. A prototype was developed with components easily available on the market; this system consists of a single stage reciprocating hermetic compressor, conventional fin and tube evaporator, wire-on-tube gas cooler and a capillary tube throttling device, externally brazed to the suction line. The energy performance of the CO2 system under steady-state and cyclic operations was investigated and compared with the one of the conventional refrigerants. A methodology to design properly the capillary tube and to optimize the combination of capillary tube and refrigerant charge is also presented. This methodology puts a special focus on the discharge pressure profile versus the theoretical optimum discharge pressure.

Détails

  • Titre original : Design and analysis of a transcritical R-744 bottle cooler.
  • Identifiant de la fiche : 2008-2136
  • Langues : Anglais
  • Source : Technological innovations in air-conditioning and refrigeration industry + CD-ROM.
  • Date d'édition : 08/06/2007

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