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Étude préliminaire d'un nouveau refroidisseur d'eau compact au R718 muni d'un compresseur monoétagé centrifuge et d'éjecteurs diphasiques intégrés.

Preliminary study of a novel compact R718 water chiller with integration of a single stage centrifugal compressor and two-phase ejectors.

Numéro : pap. 2217

Auteurs : SAREVSKI V. N., SAREVSKI M. N.

Résumé

A novel compact R718 water chiller with integration of a centrifugal compressor stage and two phase ejectors as a second stage compression device is proposed. The paper describes the investigations of this R718 refrigerating cycle. The limitations of the R718 centrifugal compressor stage pressure ratio are discussed, and possibilities for introduction of two-phase ejectors in the R718 refrigerating systems with direct evaporation and condensation are analyzed. The complex thermal and flow phenomena connected with additional compression, desuperheating and condensation inside the two-phase ejector flow field are investigated and performance characteristics are estimated. The thermodynamic processes are shown in pressure (enthalpy and temperature) entropy diagrams. Based on the described thermodynamic model, a computational procedure was generated to evaluate the performance characteristics of this R718 refrigerating unit. The implementation of the two-phase ejector in the R718 centrifugal compressor refrigerating systems causes simplification of the R718 unit, and reduction of their size and cost. The energy efficiency of these refrigerating systems may also be increased.

Documents disponibles

Format PDF

Pages : 10 p.

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 : Preliminary study of a novel compact R718 water chiller with integration of a single stage centrifugal compressor and two-phase ejectors.
  • Identifiant de la fiche : 30006621
  • Langues : Anglais
  • Source : 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 16/07/2012

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