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Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon

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  • Zhongchao Zhao

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Yong Zhang

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Yanrui Zhang

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Yimeng Zhou

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Hao Hu

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

Abstract

The transient thermal performance of phase change and heat and mass transfer in a two-phase closed thermosyphon are studied with computational fluid dynamics (CFD). A CFD model based on the volume of fluid technique is built. Deionized water is specified as the working fluid of this thermosyphon. The CFD model reproduces evaporation and condensation in the thermosyphon at different heating inputs. The average wall temperatures are also analyzed. Variations of average wall temperatures indicate that this thermosyphon reaches a steady state after 19 s, and starts to work in advance when the heating input increases. Moreover, thermal resistance is decreased until a minimum (0.552 K/W) by increasing the heating input, and the effective thermal conductivity is elevated to a maximum (2.07 × 106 W/m∙K).

Suggested Citation

  • Zhongchao Zhao & Yong Zhang & Yanrui Zhang & Yimeng Zhou & Hao Hu, 2018. "Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon," Energies, MDPI, vol. 11(6), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1433-:d:150426
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    References listed on IDEAS

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    1. Tong, Zhen & Liu, Xiao-Hua & Jiang, Yi, 2017. "Three typical operating states of an R744 two-phase thermosyphon loop," Applied Energy, Elsevier, vol. 206(C), pages 181-192.
    2. Zhang, Penglei & Wang, Baolong & Shi, Wenxing & Li, Xianting, 2015. "Experimental investigation on two-phase thermosyphon loop with partially liquid-filled downcomer," Applied Energy, Elsevier, vol. 160(C), pages 10-17.
    3. Weng, Ying-Che & Cho, Hung-Pin & Chang, Chih-Chung & Chen, Sih-Li, 2011. "Heat pipe with PCM for electronic cooling," Applied Energy, Elsevier, vol. 88(5), pages 1825-1833, May.
    4. Tong, Zhen & Liu, Xiao-Hua & Jiang, Yi, 2017. "Experimental study of the self-regulating performance of an R744 two-phase thermosyphon loop," Applied Energy, Elsevier, vol. 186(P1), pages 1-12.
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    Cited by:

    1. Grzegorz Czerwiński & Jerzy Wołoszyn, 2021. "Numerical Study of a Cooling System Using Phase Change of a Refrigerant in a Thermosyphon," Energies, MDPI, vol. 14(12), pages 1-22, June.
    2. Eui-Hyeok Song & Kye-Bock Lee & Seok-Ho Rhi, 2021. "Thermal and Flow Simulation of Concentric Annular Heat Pipe with Symmetric or Asymmetric Condenser," Energies, MDPI, vol. 14(11), pages 1-23, June.
    3. Kaveh Sadeghi & Mostafa Kahani & Mohammad Hossein Ahmadi & Mohammad Zamen, 2022. "CFD Modelling and Visual Analysis of Heat Transfer and Flow Pattern in a Vertical Two-Phase Closed Thermosyphon for Moderate-Temperature Application," Energies, MDPI, vol. 15(23), pages 1-22, November.
    4. Rafal Andrzejczyk, 2018. "Experimental Investigation of the Thermal Performance of a Wickless Heat Pipe Operating with Different Fluids: Water, Ethanol, and SES36. Analysis of Influences of Instability Processes at Working Ope," Energies, MDPI, vol. 12(1), pages 1-28, December.

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