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Caractéristiques d'encrassement de tubes à nervures rugueuses hélicoïdales internes utilisant de l'eau issue d'une tour de refroidissement à faible vélocité.

Fouling characteristics of internal helical-ribbed tubes using low-velocity cooling tower water.

Auteurs : LI W., WEBB R. L.

Type d'article : Article

Résumé

This paper provides long-term cooling tower water fouling data in seven 15.54 mm I.D. copper, helically ribbed tubes taken at low water velocity (1.07 m/s). The ranges of geometric parameters were number of rib starts (18-45), helix angle (0.33-0.55 mm), and height (25-45 °C). A series of semi-theoretical fouling correlations as a function of the product of area indexes and efficiency indexes was developed. They were applicable to different internally ribbed geometries within the above dimensional range. A series of linear multiple regression correlations was also developed. The average deviations of the two series of correlations were 4.4% and 4.8%, respectively. The correlations can be directly used to assess the fouling potential of enhanced tubes in actual cooling water situations.

Détails

  • Titre original : Fouling characteristics of internal helical-ribbed tubes using low-velocity cooling tower water.
  • Identifiant de la fiche : 2002-2896
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 45 - n. 8
  • Date d'édition : 04/2002

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