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Numerical and Experimental Study on Convective Heat Transfer Characteristics in Foam Materials

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  • Hongyan Lu

    (School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
    Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale, Beijing 100044, China)

  • Lixin Yang

    (School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
    Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale, Beijing 100044, China)

  • Zhiyong Wu

    (The Key Laboratory of Solar Thermal Energy and Photovoltaic System, IEE-CAS, Beijing 100190, China)

  • Siqi Xu

    (School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
    Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale, Beijing 100044, China)

Abstract

Foam materials are widely used in heat exchange because of their high porosity and large specific surface area. Correctly characterizing heat transfer characteristics is the key to ensuring efficient heat transfer. In this paper, single-blow transient test technology is used to experimentally measure the temperature. Silicon carbide ceramics with various thicknesses ranging from 30 to 105 mm and different pore structures were used in the experiments. The test was carried out at the velocity ranging from 0.5 to 1.8 m/s. The air temperature distributions of the inlet and outlet were obtained by processing the experimental data, and the regularity of the average volumetric heat transfer coefficient was obtained and analyzed. Subsequently, the simplified tetrakaidecahedron models with a porosity of 0.85 and 0.75 were used to analyze the heat transfer characteristics. The local thermal equilibrium and local thermal non-equilibrium at the pore scale were analyzed. By comparing the simulation with the experiment, it shows that the larger thickness affects local thermal equilibrium and leads to a decrease in the volumetric heat transfer coefficient. The conclusion can be used to guide the optimization of the design of foam material-mediated heat exchange equipment.

Suggested Citation

  • Hongyan Lu & Lixin Yang & Zhiyong Wu & Siqi Xu, 2020. "Numerical and Experimental Study on Convective Heat Transfer Characteristics in Foam Materials," Energies, MDPI, vol. 13(2), pages 1-14, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:2:p:348-:d:307314
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    References listed on IDEAS

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    4. Rashidi, Saman & Kashefi, Mohammad Hossein & Kim, Kyung Chun & Samimi-Abianeh, Omid, 2019. "Potentials of porous materials for energy management in heat exchangers – A comprehensive review," Applied Energy, Elsevier, vol. 243(C), pages 206-232.
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    1. Avila-Marin, Antonio L. & Fernandez-Reche, Jesus & Gianella, Sandro & Ferrari, Luca & Sanchez-Señoran, Daniel, 2022. "Experimental study of innovative periodic cellular structures as air volumetric absorbers," Renewable Energy, Elsevier, vol. 184(C), pages 391-404.
    2. Natalia Rydalina & Elena Antonova & Irina Akhmetova & Svetlana Ilyashenko & Olga Afanaseva & Vincenzo Bianco & Alexander Fedyukhin, 2020. "Analysis of the Efficiency of Using Heat Exchangers with Porous Inserts in Heat and Gas Supply Systems," Energies, MDPI, vol. 13(22), pages 1-13, November.

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