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Évaluation expérimentale des distributeurs d’écoulement pour les films tombants sur des faisceaux de tubes horizontaux.

Experimental assessment of flow distributors for falling-films over horizontal tube banks.

Auteurs : BUSTAMANTE J. G., GARIMELLA S.

Type d'article : Article, Article de la RIF

Résumé

Flow distributors are designed to evenly spread fluid along the length of horizontal tube banks used in falling-film heat and mass transfer components. This study comparatively assesses the performance of eight distributor designs described in previous studies under uniform conditions: water at 20°C and atmospheric pressure with a distribution length of 203?mm over a film Reynolds number range of 12–495. Flow regimes from the droplet to sheet regime were observed, and the levels of maldistribution were quantified using a simple segmented collection system. Droplet and jet characteristics were measured using image analysis of high-speed video, with droplet volumes ranging from 20?mm3 to 540?mm3 and jet diameters ranging from 1.2?mm to 4?mm. Overall, the box-based distributor designs outperformed the tube-based distributors, but maldistribution was significant (>50%) for some flow rates in all the tested designs.

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Format PDF

Pages : 24-33

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    20 €

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Détails

  • Titre original : Experimental assessment of flow distributors for falling-films over horizontal tube banks.
  • Identifiant de la fiche : 30025730
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 101
  • Date d'édition : 05/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.02.025

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