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Etude expérimentale sur un compresseur radial entraîné directement pour les pompes à chaleur résidentielles.

Experimental investigation of a direct driven radial compressor for domestic heat pumps.

Auteurs : SCHIFFMANN J., FAVRAT D.

Type d'article : Article, Article de la RIF

Résumé

The presence of oil in domestic heat pumps is an obstacle toward higher efficiency, particularly for enhanced surface evaporators and for advanced concepts based on two stage cycles. Very compact direct driven radial compressors supported on oil-free bearings represent a promising alternative. This paper presents the derivation of the specifications, the choice for an appropriate refrigerant fluid and the design of a proof of concept prototype with the various tradeoffs between the impeller characteristics to follow the seasonal heat demand, the bearing and rotor-dynamics for a stable operation. Heat pump simulation results, the design of the impeller as well as the layout of the experimental facility and first experimental results are presented. An impeller with a tip diameter of 20 mm has been tested at rotational speeds of up to 210 krpm reaching pressure ratios in excess of 3.3 and efficiencies above 78%. The refrigerant chosen for this first experimental approach is HFC-134a.

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Format PDF

Pages : pp. 1918-1928

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Experimental investigation of a direct driven radial compressor for domestic heat pumps.
  • Identifiant de la fiche : 2009-2517
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 8
  • Date d'édition : 12/2009

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