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Investigation on Convection Heat Transfer Augment in Spirally Corrugated Pipe

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  • Xiuzhen Li

    (Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, China
    Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Shijie Liu

    (Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Xun Mo

    (Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Zhaoyang Sun

    (School of Information Technology and Urban Construction, Luoyang Polytechnic, Luoyang 471942, China)

  • Guo Tian

    (Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, China)

  • Yifan Xin

    (Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, China)

  • Dongsheng Zhu

    (Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China
    Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

Abstract

A numerical simulation on the heat transport augmentation and flow drag behavior of spirally corrugated pipes was performed. The simulation was conducted on the basis of the experimental results documented in the published literature. The influence of the thread height and pitch on the hydraulic–thermal performance as well as the mechanism of the convection heat transport development inside the spirally corrugated pipe were explored. It was discovered that the convection heat transport performance elevates in the Reynolds number region of 4000~13,000 as the thread height rises or the Reynolds number enlarges, but it declines when the thread pitch extends. The convection heat transport performance marked by the Nusselt number of the spirally corrugated pipe could reach 2.77 times that of the plain pipe, while the flow resistance coefficients of spirally corrugated pipes are 89~324% above that of the plain pipe. It enlarges with the rise in thread height but declines with the extension of the thread pitch. It also reduces when the Reynolds number enlarges. The factors of overall heat transmission performance for all the spirally corrugated pipes are above 1.00, and they increase in the Reynolds number region of 4000~7000 and then decrease in the Reynolds number region of 7000 to 13,000. The secondary flow at the cross-sections and the vortex between two adjacent corrugated grooves are the basic causes of the promotion of convection heat transport inside the spirally corrugated pipes. The secondary flow near the pipe wall both disrupts the border layer and boosts the radial interfusion of the fluid. In addition, the existence of vortexes makes the secondary flow act on the convection heat transmission continuously and positively in the region close to the pipe wall.

Suggested Citation

  • Xiuzhen Li & Shijie Liu & Xun Mo & Zhaoyang Sun & Guo Tian & Yifan Xin & Dongsheng Zhu, 2023. "Investigation on Convection Heat Transfer Augment in Spirally Corrugated Pipe," Energies, MDPI, vol. 16(3), pages 1-17, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1063-:d:1039646
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    References listed on IDEAS

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    1. Ki-Bea Hong & Dong-Woo Kim & Jihyun Kwark & Jun-Seok Nam & Hong-Sun Ryou, 2021. "Numerical Study on the Effect of the Pipe Groove Height and Pitch on the Flow Characteristics of Corrugated Pipe," Energies, MDPI, vol. 14(9), pages 1-15, May.
    2. Rashidi, Saman & Hormozi, Faramarz & Sundén, Bengt & Mahian, Omid, 2019. "Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications," Applied Energy, Elsevier, vol. 250(C), pages 1491-1547.
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    Cited by:

    1. Muhammad Waheed Azam & Luca Cattani & Matteo Malavasi & Fabio Bozzoli, 2023. "Experimental Study of the Corrugation Profile Effect on the Local Heat Transfer Coefficient," Energies, MDPI, vol. 16(20), pages 1-21, October.

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