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Document IIF

Modèle thermodynamique pour compresseurs à piston, se concentrant sur les rendements dépendant du fluide.

Thermodynamic model for reciprocating compressors with the focus on fluid dependent efficiencies.

Auteurs : ROSKOSCH D., VENZIK V., ATAKAN B.

Type d'article : Article, Article de la RIF

Résumé

Fluids with high global warming potential, which are used in existing refrigeration cycles and heat pumps, will have to be replaced soon by less harmful fluids, but the fluid selection is difficult especially due to the unknown compressor performance. In this work a differential compressor model for reciprocating compressors is introduced which predicts volumetric and isentropic efficiencies quickly and can be easily fitted with measured data at only one operation point of an existing compressor. In order to characterise the influence of different fluids two semi-physical correlations for the valve flows are fitted here, and a procedure of transferring them to different compressors is shown. The model is validated on, in total, 63 measured points based on numerous fluids from one semi-hermetic reciprocating compressor which is part of a heat pump cycle. The calculations lead to mean prediction errors of 3.0% for the isentropic and 2.3% for the volumetric efficiency.

Documents disponibles

Format PDF

Pages : 104-116

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 : Thermodynamic model for reciprocating compressors with the focus on fluid dependent efficiencies.
  • Identifiant de la fiche : 30022526
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 84
  • Date d'édition : 12/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.08.011

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