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Étude numérique des caractéristiques de performance et des pulsations de pression du compresseur à spirale électrique.

Numerical study on the performance characteristics and pressure pulsation of the electric scroll compressor.

Numéro : 1229

Auteurs : MA K., HE Z., LI D., ZHOU M., CHEN W.

Résumé

Scroll compressors were widely employed in electric vehicles due to their high efficiency, low noise, and low vibration. The electric scroll compressor is operated through direct motor drive, with motor cooling facilitated by the intake refrigerant. After compression, the refrigerants were exhausted through the oil and gas separation structure. However, substantial pressure loss occurs due to the larger intake and exhaust flow areas compared to the scroll area. This paper presents a complete computational fluid dynamics (CFD) model of the electric scroll compressor. The model incorporates domains for the motor, the rotating main balance weight, the crescent-shaped scroll compression chambers, as well as the exhaust buffer chamber and oil separator. Through calculations, the pressure and temperature distribution within the scroll compressor are determined. Under specified operating conditions, as the rotational speed escalates from 5000 rpm to 10000 rpm, the inlet pressure loss experiences an increment from 5-15 kPa to 25-55 kPa. Concurrently, the exhaust fluctuation transitions from 15-15.9 bar to 16-17.8 bar. Comparatively, the simplified model exhibits significantly enhanced volumetric efficiency and isentropic efficiency. When simplifying the model and establishing boundaries, the pressure loss should be considered on the operating conditions to enhance calculation accuracy. The developed complete CFD model serves as a valuable tool for analyzing and enhancing the performance of electric scroll compressors.

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Pages : 11

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Détails

  • Titre original : Numerical study on the performance characteristics and pressure pulsation of the electric scroll compressor.
  • Identifiant de la fiche : 30033586
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Date d'édition : 18/07/2024

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