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Choix du frigorigène pour les petits turbocompresseurs radiaux sans huile à grande vitesse pour les applications de refroidissement.

Small, high-speed, oil-free radial turbo-compressors for cooling applications: refrigerant selection.

Numéro : pap. 2386

Auteurs : KONTOMARIS K. K., ARPAGAUS C., BERTSCH S. S., et al.

Résumé

Emerging energy-efficient, oil-free radial centrifugal compressors seem promising for small to mid-capacity air conditioning and refrigeration applications. Compressor design must balance trade-offs among impeller diameter, bearing type, and refrigerant selection. This paper guides refrigerant selection for single-stage systems delivering 10-250 kWtherm of cooling at a representative evaporating temperature of 0 oC. The viable oil-free bearing types, the impeller diameter for maximum compressor efficiency and the resulting system efficiency were determined for a set of representative refrigerants with normal boiling temperatures ranging from -51.7 oC to +49 oC. For residential scale cooling systems, low pressure refrigerants enable high energy efficiency with small size, high-speed centrifugal compressors and vapor-lubricated bearings. For commercial scale cooling systems, medium pressure refrigerants enable high energy efficiency with reasonable size, high-speed centrifugal compressors and vapor-lubricated bearings. For commercial scale cooling systems, low pressure refrigerants enable higher energy efficiency with larger size, high-speed centrifugal compressors and magnetic bearings compared to medium pressure refrigerants with vapor-lubricated bearings. The preferred refrigerant enables combinations of system first and operating costs that are attractive for the intended markets, while meeting equipment reliability, operability and other constraints.

Documents disponibles

Format PDF

Pages : 10

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 : Small, high-speed, oil-free radial turbo-compressors for cooling applications: refrigerant selection.
  • Identifiant de la fiche : 30024528
  • Langues : Anglais
  • Sujet : Généralités
  • Source : 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Date d'édition : 09/07/2018

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