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Modèle à base de NTU (unités de turbidité néphélométriques) servant à estimer la surchauffe à l'aspiration des compresseurs à spirale.

A NTU-based model to estimate suction superheating in scroll compressors.

Numéro : pap. 1374

Auteurs : DINIZ M. C., DESCHAMPS C. J.

Résumé

Suction superheating plays a major role in determining the efficiency degradation of hermetic scroll compressors. Current models to predict superheating are usually experimentally calibrated and therefore can only be applied to existing compressors. This paper presents a thermal model to estimate suction superheating in scroll compressors, based on the NTU method for heat exchangers design. The model considers an isothermal surface exchanging heat with the gas in the suction path and in the discharge plenum. Compared to other models, the new approach described herein has the advantage of not requiring any experimental input data. The thermal model is coupled to a thermodynamic model and applied to evaluate the performance of a scroll compressor. The model was capable to predict the suction gas temperature in good agreement with experimental data, making it particularly useful for compressor design.

Documents disponibles

Format PDF

Pages : 10 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 : A NTU-based model to estimate suction superheating in scroll compressors.
  • Identifiant de la fiche : 30014108
  • Langues : Anglais
  • Source : 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
  • Date d'édition : 14/07/2014

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