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Impact de la structure de la chicane hélicoïdale sur les performances de transfert de chaleur de condenseurs verticaux.

Impact of helical baffle structure on heat transfer performance of vertical condensers.

Auteurs : CHEN Y., YANG S., WU J., et al.

Type d'article : Article

Résumé

The heat transfer performance of a novel type trisection helical baffle vertical condenser was experimentally investigated. The testing schemes have a common shell and replaceable tube bundles, including six tube bundles with different structured trisection helical baffles and a segmental one. The investigation is aimed at revealing the impacts on the heat transfer performance of structural improvements for facilitating condensate drainage, including inclined helical baffles of variable angles, dual threads and bent tail edges. The experimental results show that the best scheme, which adopts dual thread variable angled baffles with bent tail edges, has the average shell side heat transfer coefficient 131.8% higher than that of the segmental one. Taking the shell side heat transfer coefficient as the evaluation index, the single thread variable angle schemes are on average 25.47% higher than the single thread fixed angle ones; the dual thread variable angle schemes are on average 15.74% higher than the single thread ones; and the schemes with bent tail edges are on average 6.37% higher than the corresponding ones without bent tail edges. The results give a prospective way to overcome the deficiency of inferior heat transfer performance of the conventional segmental baffled vertical condenser to that of the horizontal one.

Détails

  • Titre original : Impact of helical baffle structure on heat transfer performance of vertical condensers.
  • Identifiant de la fiche : 30021154
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 115
  • Date d'édition : 25/03/2017
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2016.12.118

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