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Modèle de gaz réel pour un compresseur frigorifique à plateau oscillant électrique.

Real gas model for an electric swashplate refrigeration compressor.

Auteurs : ARQAM M., VIET DAO D., JAHANGIRI A., MITCHELL M., WOORDFIELD P.

Type d'article : Article de la RIF

Résumé

A real-gas, restricted-flow valve model is compared with an ideal-gas, ideal-valve model for a 10-cylinder swashplate refrigeration compressor. Real gas properties of R134a are evaluated using the NIST standard reference database. A minor-loss discharge-coefficient approach is used to model the refrigerant flow rate through reed valves while the ideal-valve model requires no pressure difference to open the valve. In contrast with the ideal model, the discharge temperature, refrigerant mass flow rate and volumetric efficiency as a function of rotational speed are predicted well by including real-gas properties and flow restriction on the inlet valve. The ideal-gas model significantly overpredicts the discharge temperature and shows no dependence on rpm. Heat transfer to and from the cylinder wall during compression and expansion is found to have only a small effect on predictions of compressor performance. The valve model for the suction side has the largest influence on compressor performance predictions as a function of rpm.

Documents disponibles

Format PDF

Pages : 210-219

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 : Real gas model for an electric swashplate refrigeration compressor.
  • Identifiant de la fiche : 30027711
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 118
  • Date d'édition : 10/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.05.025

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