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Avantage en termes d'efficacité à charge partielle des compresseurs centrifuges sans huile.

Part load efficiency benefit of oil-free centrifugal compressors.

Auteurs : ALVARES J.

Type d'article : Article

Résumé

This article will present a seasonal energy efficiency analysis of a water-cooled chiller with multiple oil-free, high-speed direct-drive centrifugal compressors and compare the results against the seasonal energy efficiency that can be expected from water-cooled chillers with screw and scroll compressors. It will be shown that the fixed built-in compression ratio of screw compressors limits the compressor efficiency at the lower lift off-design conditions where chillers operate most of the time, while the variable speed direct drive centrifugal compressor maintains its peak efficiency at off-design conditions. Following the Air-Conditioning, Heating and Refrigeration Institute (AHRI) Standard 550-590 for performance rating of water chilling packages, it will be shown that high speed direct-drive centrifugal chillers have the capability to reduce the annual energy consumption of water cooled chillers by more than 30% compared to typical chillers with screw compressors as a result of better compressor efficiency at off-design conditions.

Documents disponibles

Format PDF

Pages : 58-64 (4 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 : Part load efficiency benefit of oil-free centrifugal compressors.
  • Identifiant de la fiche : 30014521
  • Langues : Anglais
  • Source : Air Conditioning and Refrigeration Journal - vol. 18 - n. 1
  • Date d'édition : 01/2015

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