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Thermal analysis of a conceptual loop heat pipe for solar central receivers

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  • Liao, Zhirong
  • Xu, Chao
  • Ren, Yunxiu
  • Gao, Feng
  • Ju, Xing
  • Du, Xiaoze

Abstract

This study presents a novel loop heat pipe central receiver for the solar power tower (SPT) plant. For the first study, the evaporator section of the proposed receiver is simulated by a three-dimensional numerical model to study the flow, heat transfer and the evaporation phenomenon of the working fluid. In addition, effects of the outlet boundary pressure at the vapor groove and the solar irradiation heat flux on the absorbing surface are analyzed. The results show that most of the working fluid vaporizes at the liquid/vapor interface close to the casing. The heat transferred from the casing to the vapor working fluid is negligible, and thus the vapor temperature in the groove can be assumed to be constant in simulating the whole loop heat pipe central receiver. A lower temperature difference between the liquid/vapor interface and the compensation chamber is beneficial for obtaining more heat energy transferred to the vapor working fluid. It is also found that the evaporation heat transfer coefficient changes obviously with the absorbed solar heat flux. The findings of present work can be used as a reference to the modelling and design of the whole loop heat pipe central receiver in the next step.

Suggested Citation

  • Liao, Zhirong & Xu, Chao & Ren, Yunxiu & Gao, Feng & Ju, Xing & Du, Xiaoze, 2018. "Thermal analysis of a conceptual loop heat pipe for solar central receivers," Energy, Elsevier, vol. 158(C), pages 709-718.
    • Handle: RePEc:eee:energy:v:158:y:2018:i:c:p:709-718
    DOI: 10.1016/j.energy.2018.06.069
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    References listed on IDEAS

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    1. Zhu, Han-Hui & Wang, Kun & He, Ya-Ling, 2017. "Thermodynamic analysis and comparison for different direct-heated supercritical CO2 Brayton cycles integrated into a solar thermal power tower system," Energy, Elsevier, vol. 140(P1), pages 144-157.
    2. Ho, Clifford K. & Iverson, Brian D., 2014. "Review of high-temperature central receiver designs for concentrating solar power," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 835-846.
    3. Geir Hansen & Erling Næss & Kolbeinn Kristjansson, 2016. "Analysis of a Vertical Flat Heat Pipe Using Potassium Working Fluid and a Wick of Compressed Nickel Foam," Energies, MDPI, vol. 9(3), pages 1-17, March.
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    Cited by:

    1. Zhou, Ruiwen & Ling, Xiang & Peng, Hao & Yang, Lin, 2018. "Thermal characteristics of the combined flat plate heat receiver in solar power tower plant," Energy, Elsevier, vol. 165(PA), pages 275-289.
    2. Eui Guk Jung & Joon Hong Boo, 2019. "A Novel Analytical Modeling of a Loop Heat Pipe Employing the Thin-Film Theory: Part I—Modeling and Simulation," Energies, MDPI, vol. 12(12), pages 1-21, June.
    3. Jung, Eui Guk & Boo, Joon Hong, 2020. "Experimental observation of thermal behavior of a loop heat pipe with a bypass line under high heat flux," Energy, Elsevier, vol. 197(C).
    4. Jiwen Cen & Feng Li & Tingliang Li & Wenbo Huang & Juanwen Chen & Fangming Jiang, 2021. "Experimental Study of the Heat-Transfer Performance of an Extra-Long Gravity-Assisted Heat Pipe Aiming at Geothermal Heat Exploitation," Sustainability, MDPI, vol. 13(22), pages 1-16, November.
    5. Eui Guk Jung & Joon Hong Boo, 2019. "A Novel Analytical Modeling of a Loop Heat Pipe Employing Thin-Film Theory: Part II—Experimental Validation," Energies, MDPI, vol. 12(12), pages 1-15, June.

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