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Comparative Study of Shell and Helically-Coiled Tube Heat Exchangers with Various Dimple Arrangements in Condensers for Odor Control in a Pyrolysis System

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  • Sun-Min Kim

    (Division of Environmental and Plant Engineering, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea)

  • Jun-Ho Jo

    (Division of Environmental and Plant Engineering, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea)

  • Ye-Eun Lee

    (Division of Environmental and Plant Engineering, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea)

  • Yeong-Seok Yoo

    (Division of Environmental and Plant Engineering, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea)

Abstract

This study performed evaluations of the shell and helically-coiled tube heat exchangers with various dimple arrangements, that is, flat, inline, staggered, and bulged, at different Dean numbers ( De ) and inlet temperatures of a hot channel. Conjugated heat transfer was analyzed to evaluate the heat transfer performance of the exchangers through temperature difference between the inlet and outlet, Nusselt number inside the coiled tube, and pressure drop of the coiled tube by using 3-D Reynolds-averaged Navier–Stokes (RANS) equations with shear stress transport turbulence closure. A grid dependency test was performed to determine the optimal number of the grid system. The numerical results were validated using the experimental data, and showed good agreement. The inline and staggered arrangements show the highest temperature differences through all De. The staggered arrangement shows the best heat transfer performance, whereas the inline arrangement shows the second highest performance with all ranges of De and the hot channel’s inlet temperature. The inline and staggered arrangements show the highest pressure drop among all inlet temperatures of the hot channel.

Suggested Citation

  • Sun-Min Kim & Jun-Ho Jo & Ye-Eun Lee & Yeong-Seok Yoo, 2016. "Comparative Study of Shell and Helically-Coiled Tube Heat Exchangers with Various Dimple Arrangements in Condensers for Odor Control in a Pyrolysis System," Energies, MDPI, vol. 9(12), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:12:p:1027-:d:84448
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    3. Guo, Jiangfeng & Xu, Mingtian & Cheng, Lin, 2009. "The application of field synergy number in shell-and-tube heat exchanger optimization design," Applied Energy, Elsevier, vol. 86(10), pages 2079-2087, October.
    4. Ahmed, I.I. & Gupta, A.K., 2010. "Pyrolysis and gasification of food waste: Syngas characteristics and char gasification kinetics," Applied Energy, Elsevier, vol. 87(1), pages 101-108, January.
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    Cited by:

    1. Bjørn H. Hjertager, 2017. "Engineering Fluid Dynamics," Energies, MDPI, vol. 10(10), pages 1-2, September.
    2. Shiyang Li & Lang Zhou & Jian Yang & Qiuwang Wang, 2018. "Numerical Simulation of Flow and Heat Transfer in Structured Packed Beds with Smooth or Dimpled Spheres at Low Channel to Particle Diameter Ratio," Energies, MDPI, vol. 11(4), pages 1-15, April.

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