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Transfert de chaleur par écoulement en ébullition et caractéristiques de la chute de pression du R1234Yf dans une gaine plate nervurée.

Flow boiling heat transfer and pressure drop characteristics of R1234yf in a dimpled flat duct.

Numéro : 2340

Auteurs : GAO Y., FENG Y., TANG K., HRNJAK P.

Résumé

Among various heat transfer enhancement technologies, the dimpled surface, which is inspired by the resistance reduction characteristics of the specific concaves on golf balls, has the potential to improve heat transfer with a relatively low pressure-drop penalty. More and more applications of dimpled surfaces in heat exchangers have shown up in industries. However, the lack of experimental data, especially the heat transfer and pressure drop data for liquid-and-vapor two-phase flow, inside the dimpled flow channels prevents the good design of the dimpled heat exchangers. In this study, a facility has been designed and built to investigate the heat transfer and pressure drop of flow-boiling R1234yf in a dimpled flat duct. The details of the facility, especially the test section, are presented. A microscope is used to measure the geometrical dimensions of the dimpled flat tube. The heat loss is tested and the heat balance is checked before the experiments. The experiments are performed at mass flux from 100 to 200 kg m-2 s-1, heat flux of 5 kW m-2, saturation temperature of 15 °C, and vapor quality from 0.1 to 0.95. The experimental results are presented and discussed in detail.

Documents disponibles

Format PDF

Pages : 7

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Flow boiling heat transfer and pressure drop characteristics of R1234yf in a dimpled flat duct.
  • Identifiant de la fiche : 30028463
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 05/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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