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Influence of fluid rotation on the heat transfer and pressure drop in double-pipe heat exchangers

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  • Yildiz, Cengiz
  • Bíçer, Yasar
  • Pehlívan, Dursun

Abstract

In this work the effect of propellers, which were able to rotate freely due to the force exerted by the fluid flowing through the inner pipe of the double-pipe heat exchangers, on the heat transfer and pressure was investigated expermentally. The experiments were undertaken for the Reynolds number range of 2500-15000 and for several propellers. In the system, heat-transfer rates were about 250% better than those found with the system without propellers. Thus, because of rotating the fluid, propellers and their number become influential upon heat transfer. The increase in pressure-drop changed between 500 and 1000% in comparison with that for the empty tube, depending on Reynolds number and number of propellers.

Suggested Citation

  • Yildiz, Cengiz & Bíçer, Yasar & Pehlívan, Dursun, 1996. "Influence of fluid rotation on the heat transfer and pressure drop in double-pipe heat exchangers," Applied Energy, Elsevier, vol. 54(1), pages 49-56, May.
    • Handle: RePEc:eee:appene:v:54:y:1996:i:1:p:49-56
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    References listed on IDEAS

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    1. Yildiz, Cengiz & Biçer, Yasar & Pehlivan, Dursun, 1995. "Heat transfers and pressure drops in rotating helical pipes," Applied Energy, Elsevier, vol. 50(1), pages 85-94.
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    Cited by:

    1. Muthusamy, C. & Srithar, K., 2017. "Energy saving potential in humidification-dehumidification desalination system," Energy, Elsevier, vol. 118(C), pages 729-741.

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