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Effets de la mauvaise distribution de l'écoulement côté air sur les performances de transfert de chaleur des échangeurs de chaleur polymères couplés à l'air.

Effects of air-side flow maldistribution on the heat transfer performance of polymeric air-coupled heat exchangers.

Numéro : 2192

Auteurs : BOMAN D. B., MOHAPI B., WEXLER J. S.

Résumé

Developing innovative, high-performing liquid-air heat exchangers requires the use of novel materials and control over the geometry. Polymeric pillow-plate heat exchangers are a promising technology; however, due to the inherent flexibility of polymer films, variability in plate-to-plate spacing in these devices can lead to flow maldistribution on the air side. In this work, a model for predicting the heat transfer performance in the presence of these effects is developed and compared to experimental results for polymeric pillow-plate heat exchangers. The effects of variability are severe, with heat exchangers with a 1.0-mm spacing between plates showing over 50% reduction in heat transfer coefficient when the ratio of standard deviation to mean of the spacing exceeds 30%. The model is able to predict the results well for such compact heat exchangers, with an average absolute deviation of 11.3%.

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Pages : 10 p.

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Détails

  • Titre original : Effects of air-side flow maldistribution on the heat transfer performance of polymeric air-coupled heat exchangers.
  • Identifiant de la fiche : 30030603
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 2022

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