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Les caractéristiques des configurations d'écoulement dans l'échangeur de chaleur à plaques et à calandre.

The characteristics of flow patterns in the shell-and-plate heat exchanger.

Auteurs : YANG Y., XU L., HAN H., REN Z., WU K., LIU F.

Type d'article : Article de la RIF

Résumé

The flow path of the fluid in the passage of the shell-and-plate heat exchanger shows the characteristics of first dispersing and then gathering, which significantly affects the efficiency of the heat exchanger. Compared with the traditional rectangular plate heat exchanger (PHE), an in-depth understanding of the flow characteristics in SPHE is insufficient. The properties of the flows between the adjacent plates were numerically studied in the present study. The single-phase fluid passes rapidly between the staggered contact points, and there is noticeable pressure fluctuation at the entrance and exit. In addition, the flow diffusion and convergence cause noticeable differences in local velocity and pressure variation. For two-phase flows, three flow patterns are defined, and a subregional discussion on the flow pattern in the passage and their pressure gradient and void fraction are also provided. The void fraction is also introduced to determine the flow patterns, i.e., the dominant flow pattern is bubbly flow when , is for slug flow, and the primary type is film flow when . By analyzing the pressure drop, an empirical equation of pressure drop prediction is proposed.

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Format PDF

Pages : 315-330

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    20 €

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Détails

  • Titre original : The characteristics of flow patterns in the shell-and-plate heat exchanger.
  • Identifiant de la fiche : 30031943
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 152
  • Date d'édition : 08/2023
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2023.04.024

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