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Analysis of a Vertical Flat Heat Pipe Using Potassium Working Fluid and a Wick of Compressed Nickel Foam

Author

Listed:
  • Geir Hansen

    (Department of Energy and Process Engineering, Norwegian University of Science and Technology, Kolbjørn Hejes vei 1a, Trondheim 7491, Norway)

  • Erling Næss

    (Department of Energy and Process Engineering, Norwegian University of Science and Technology, Kolbjørn Hejes vei 1a, Trondheim 7491, Norway
    These authors contributed equally to this work.)

  • Kolbeinn Kristjansson

    (Department of Energy and Process Engineering, Norwegian University of Science and Technology, Kolbjørn Hejes vei 1a, Trondheim 7491, Norway
    These authors contributed equally to this work.)

Abstract

Heat at high temperatures, in this work 400–650 °C, can be recovered by use of cooling panels/heat pipes in the walls of aluminum electrolysis cells. For this application a flat vertical heat pipe for heat transfer from a unilateral heat source was analyzed theoretically and in the laboratory, with special emphasis on the performance of the wick. In this heat pipe a wick of compressed nickel foam covered only the evaporator surface, and potassium was used as the working fluid. The magnitudes of key thermal resistances were estimated analytically and compared. Operating temperatures and wick performance limits obtained experimentally were compared to predictions. Thermal deformation due to unilateral heat flux was analyzed by the use of COMSOL Multiphysics ® . The consequences of hot spots at different locations on the wick were analyzed by use of a numerical 2D model. A vertical rectangular wick was shown to be most vulnerable to hot spots at the upper corners.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:3:p:170-:d:65220
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    References listed on IDEAS

    as
    1. Chan, C.W. & Siqueiros, E. & Ling-Chin, J. & Royapoor, M. & Roskilly, A.P., 2015. "Heat utilisation technologies: A critical review of heat pipes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 615-627.
    2. Geir Hansen & Erling Næss & Kolbeinn Kristjansson, 2015. "Sintered Nickel Powder Wicks for Flat Vertical Heat Pipes," Energies, MDPI, vol. 8(4), pages 1-21, March.
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    Cited by:

    1. 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.
    2. Xue Chen & Chuang Sun & Xinlin Xia & Rongqiang Liu, 2018. "Numerical Analysis on the Radiation-Convection Coupled Heat Transfer in an Open-Cell Foam Filled Annulus," Energies, MDPI, vol. 11(10), pages 1-20, October.
    3. Hongzhe Zhang & Fang Ye & Hang Guo & Xiaoke Yan, 2022. "Isothermal Performance of Heat Pipes: A Review," Energies, MDPI, vol. 15(6), pages 1-16, March.
    4. Xiang Gou & Yamei Li & Qiyan Zhang & Imran Ali Shah & Dong Zhao & Shian Liu & Yating Wang & Enyu Wang & Jinxiang Wu, 2017. "A Novel Semi-Visualizable Experimental Study of a Plate Gravity Heat Pipe at Unsteady State," Energies, MDPI, vol. 10(12), pages 1-22, December.
    5. Metin Celik & Geert Paulussen & Dennis Van Erp & Wiebren De Jong & Bendiks Jan Boersma, 2018. "Transient Modelling of Rotating and Stationary Cylindrical Heat Pipes: An Engineering Model," Energies, MDPI, vol. 11(12), pages 1-15, December.
    6. Pawel Znaczko & Emilian Szczepanski & Kazimierz Kaminski & Norbert Chamier-Gliszczynski & Jacek Kukulski, 2021. "Experimental Diagnosis of the Heat Pipe Solar Collector Malfunction. A Case Study," Energies, MDPI, vol. 14(11), pages 1-19, May.

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