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Conception d'un système frigorifique en cascade pour les applications en dessous de -50 °C utilisant la sublimation du CO2.

Design of a cascade refrigeration system for applications below -50°C using CO2-sublimation.

Numéro : pap. 2168

Auteurs : XU Y., LANGEBACH R., HESSE U.

Résumé

Within the present paper the design of a CO2-sublimation refrigeration system is introduced. Different variations of CO2 cycles were theoretically investigated and compared to a baseline R-23 system under various boundary conditions. It turned out that the overall system efficiency of a modified CO2-sublimation system could exceed the conventional R-23 cycle performance in many operation points. Based on the simulation results, a cascade design has finally been chosen. The lower stage of the cascade system can be switched between the CO2-sublimation cycle and a conventional R-23 cycle, so that these two cycles can be compared directly under the same ambient conditions. For the CO2 sublimation cycle a two-stage compression with intercooling is used as well as an internal heat exchanger. The design of this cascade refrigeration machine is currently used for building-up a demonstrator to prove the concept experimentally.

Documents disponibles

Format PDF

Pages : 11

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Design of a cascade refrigeration system for applications below -50°C using CO2-sublimation.
  • Identifiant de la fiche : 30024433
  • Langues : Anglais
  • Source : 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 09/07/2018

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