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Effects of the Wall Properties on the Cooling Efficiency in a Thermosyphon Containing PCM Suspensions

Author

Listed:
  • Ching-Jenq Ho

    (Department of Mechanical Engineering, National Cheng-Kung University, University Road, Tainan City 701, Taiwan)

  • Shih-Ming Lin

    (Department of Mechanical Engineering, National Cheng-Kung University, University Road, Tainan City 701, Taiwan)

  • Chi-Ming Lai

    (Department of Civil Engineering, National Cheng-Kung University, University Road, Tainan City 701, Taiwan)

Abstract

This study explores the effects of pipe wall properties (thermal conductivity k and wall thickness t w ) on the heat transfer performance of a rectangular thermosyphon with a phase change material (PCM) suspension and a geometric configuration (aspect ratio = 1; dimensionless heating section length = 0.8; dimensionless relative elevation between the cooling and the heating sections = 2) that ensures the optimum heat transfer efficiency in the cooling section. The following parameter ranges are studied: the dimensionless loop wall thickness (0 to 0.5), wall-to-fluid thermal conductivity ratio (0.1 to 100), modified Rayleigh number (10 10 to 10 11 ), and volumetric fraction of PCM particles (0 to 10%). The results show that appropriate selection of k and t w can lead to improved heat transfer effectiveness in the cooling section of the PCM suspension-containing rectangular thermosyphon.

Suggested Citation

  • Ching-Jenq Ho & Shih-Ming Lin & Chi-Ming Lai, 2021. "Effects of the Wall Properties on the Cooling Efficiency in a Thermosyphon Containing PCM Suspensions," Energies, MDPI, vol. 14(3), pages 1-16, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:572-:d:485563
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    References listed on IDEAS

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    1. Yang, Liu & Liu, Shuli & Zheng, Hongfei, 2019. "A comprehensive review of hydrodynamic mechanisms and heat transfer characteristics for microencapsulated phase change slurry (MPCS) in circular tube," Renewable and Sustainable Energy Reviews, Elsevier, vol. 114(C), pages 1-1.
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    Cited by:

    1. Jesus Fernando Hinojosa & Saul Fernando Moreno & Victor Manuel Maytorena, 2023. "Low-Temperature Applications of Phase Change Materials for Energy Storage: A Descriptive Review," Energies, MDPI, vol. 16(7), pages 1-39, March.

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