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Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions

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  • Wan-Ling Hu

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
    Key Laboratory of Railway Vehicle Thermal Engineering, Lanzhou Jiaotong University, Ministry of Education of China, Lanzhou 730070, China)

  • Ai-Jun Ma

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Yong Guan

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
    Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China)

  • Zhi-Jie Cui

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Yi-Bo Zhang

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

  • Jing Wang

    (School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

Abstract

Under dehumidifying conditions, the condensed water will directly affect the heat transfer and resistance characteristics of a fin-and-tube heat exchanger. The geometrical form of condensed water on fin surfaces of three different fin materials (i.e., copper fin, aluminum fin, and aluminum fin with hydrophilic layer) in a fin-and-circular-tube heat exchanger was experimentally studied in this paper. The effect of the three different fin materials on heat transfer and friction performance of the heat exchanger was researched, too. The results show that the condensation state on the surface of copper fin and aluminum fin are dropwise condensation. The condensation state on the surface of the aluminum fin with the hydrophilic layer is film condensation. For the three different material fins, increasing the air velocity ( u a,in ) and relative humidity ( RH in ) of the inlet air can enhance the heat transfer of the heat exchanger. Friction factor ( f ) of the three different material fins decreases with the increase of u a,in , however, increases with the increase of RH in . At the same u a,in or RH in , Nusselt number ( Nu ) of the copper fin heat exchanger is the largest and Nu of the aluminum fin with hydrophilic layer is the smallest, f of the aluminum fin heat exchanger is the largest and f of the aluminum fin with hydrophilic layer is the smallest. Under the identical pumping power constrain, the comprehensive heat transfer performance of the copper fin heat exchanger is the best for the studied cases.

Suggested Citation

  • Wan-Ling Hu & Ai-Jun Ma & Yong Guan & Zhi-Jie Cui & Yi-Bo Zhang & Jing Wang, 2021. "Experimental Study of the Air Side Performance of Fin-and-Tube Heat Exchanger with Different Fin Material in Dehumidifying Conditions," Energies, MDPI, vol. 14(21), pages 1-15, October.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7030-:d:665609
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    References listed on IDEAS

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    1. Ali Sadeghianjahromi & Saeid Kheradmand & Hossain Nemati & Jane-Sunn Liaw & Chi-Chuan Wang, 2018. "Compound Heat Transfer Enhancement of Wavy Fin-and-Tube Heat Exchangers through Boundary Layer Restarting and Swirled Flow," Energies, MDPI, vol. 11(8), pages 1-19, July.
    2. Marcin Łęcki & Dariusz Andrzejewski & Artur N. Gutkowski & Grzegorz Górecki, 2021. "Study of the Influence of the Lack of Contact in Plate and Fin and Tube Heat Exchanger on Heat Transfer Efficiency under Periodic Flow Conditions," Energies, MDPI, vol. 14(13), pages 1-25, June.
    3. Xiuli Liu & Hua Chen & Xiaolin Wang & Gholamreza Kefayati, 2020. "Study on Surface Condensate Water Removal and Heat Transfer Performance of a Minichannel Heat Exchanger," Energies, MDPI, vol. 13(5), pages 1-17, March.
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    Cited by:

    1. Yu Zhai & Xu Zhao & Guanghui Xue & Zhifeng Dong, 2023. "Study on Heat Transfer Performance and Parameter Improvement of Gravity-Assisted Heat Pipe Heat Transfer Unit for Waste Heat Recovery from Mine Return Air," Energies, MDPI, vol. 16(17), pages 1-17, August.
    2. Jeonggyun Ham & Gonghee Lee & Dong-wook Oh & Honghyun Cho, 2021. "Numerical Study on Non-Uniform Temperature Distribution and Thermal Performance of Plate Heat Exchanger," Energies, MDPI, vol. 14(24), pages 1-18, December.

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