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Influence de l’huile lubrifiante sur la performance thermique d’un refroidisseur de gaz au CO2.

[In Chinese. / En chinois.]

Auteurs : DAI B., LI M., MA Y., et al.

Type d'article : Article

Résumé

A theoretical model of CO2 gas cooler with PAG lubricant was developed. The heat transfer coefficient was predicted based on artificial neural network, and then the model was validated with experimental results. Further calculation shows that the thermal effectiveness increases with the length of the gas cooler tube, but the increase rate decreases gradually. Therefore, the length of the gas cooler tube should be properly designed considering the economical running in the practical applications.For the gas cooler with a smaller diameter (Dh = 2 mm), a small amount of lubricant significantly deteriorates the thermal effectiveness while for that with a larger diameter (Dh= 4 mm), the influence is not so apparent. Consequently, the oil concentration should be decreased as far as possible to keep high heat transfer performance of the small diameter gas cooler. The gas cooler performances better at higher CO2 side pressure.However, the increase rate of the thermal effectiveness decrease gradually as the pressure increases. At pressure approaching to the critical pressure, the degradation of the thermal effectiveness is more significant. Additionally, the deterioration is more apparent as the diameter decreases.

Documents disponibles

Format PDF

Pages : 1-8

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 : [In Chinese. / En chinois.]
  • Identifiant de la fiche : 30020633
  • Langues : Chinois
  • Source : Journal of Refrigeration - vol. 35 - n. 160
  • Date d'édition : 12/2014

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