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Modélisation thermique du moteur d'un compresseur frigorifique à vis semi-hermétique sous conditions de charge partielle.

Thermal modeling for the motor in semi-hermetic screw refrigeration compressor under part-load conditions.

Numéro : pap. 1246

Auteurs : CHEN W., SHEN J., HE Z., et al.

Résumé

Semi-hermetic screw refrigeration compressor is mostly driven by a three phase asynchronous induction motor with its squirrel cage rotor attached to the shaft of the compressor helical male rotor. The motor is cooled by low temperature refrigerant coming from evaporator before it is inspired into compressor suction port. In order to investigate cooling effects of the motor and performance of the compressor under part-load conditions, a lumped parameter model describing heat transfer characteristics inside the motor and a part-load model of screw refrigeration compressor are developed. Heating effects at compressor suction end are taken into account and nodes representing refrigerant inside the motor cooling passages are modeled separately. Due to the decreasing refrigerant mass flow rate and motor efficiency, temperature rise of refrigerant through the motor increases and stator winding temperature curve goes up when the compressor load drops by suction volume variation.

Documents disponibles

Format PDF

Pages : 7 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 : Thermal modeling for the motor in semi-hermetic screw refrigeration compressor under part-load conditions.
  • Identifiant de la fiche : 30007586
  • Langues : Anglais
  • Source : 2012 Purdue Conferences. 21st International Compressor Engineering Conference at Purdue.
  • Date d'édition : 16/07/2012

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