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Effets des inserts en forme de rubans torsadés sur la chute de pression lors de la condensation du R404A.

Effect of twisted tape inserts on pressure drop during R404A condensation.

Auteurs : SALIMPOUR M. R., YARMOHAMMADI S.

Type d'article : Article, Article de la RIF

Résumé

An experimental investigation was conducted to find the influence of twisted tape inserts on the pressure drop during forced convective condensation of R404A vapor in a horizontal tube. The test section was a double-pipe counter-flow heat exchanger. The refrigerant flowed in the inner tube and cooling water flowed in the annulus. Experimental tests were carried out for plain tube and four tubes with different twisted tape turbulators and several mass velocities and vapor qualities. Investigation clearly showed that using twisted tapes inside tubes increases pressure drop between 89 and 239% higher than that for plain tube. An empirical correlation was developed to predict the pressure drop during condensation inside twisted tape inserted tubes. Comparing the predicted and experimental data, it was found that the majority of the present data falls within ±20% of the proposed correlation.

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Format PDF

Pages : 263-269

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    20 €

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    Gratuit

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Détails

  • Titre original : Effect of twisted tape inserts on pressure drop during R404A condensation.
  • Identifiant de la fiche : 30003281
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 2
  • Date d'édition : 03/2012

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