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Numerical Study for Enhancement of Heat Transfer Using Discrete Metal Foam with Varying Thickness and Porosity in Solar Air Heater by LTNE Method

Author

Listed:
  • Rawal Diganjit

    (Department of Mechanical Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India)

  • N. Gnanasekaran

    (Department of Mechanical Engineering, National Institute of Technology, Karnataka, Surathkal, Mangalore 575025, India)

  • Moghtada Mobedi

    (Mechanical Engineering Department, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu-shi 432-8561, Japan)

Abstract

A two-dimensional rectangular domain is considered with a discrete arrangement at equal distances from copper metal foam in a solar air heater (SAH). The local thermal non-equilibrium model is used for the analysis of heat transfer in a single-pass rectangular channel of SAH for different mass flow rates ranging from 0.03 to 0.05 kg/s at 850 W/m 2 heat flux. Three different pores per inch (PPI) and porosities of copper metal foam with three different discrete thicknesses at equal distances are studied numerically. This paper evaluates the performance of SAH with 10 PPI 0.8769 porosity, 20 PPI 0.8567 porosity, and 30 PPI 0.92 porosity at 22 mm, 44 mm, and 88 mm thicknesses. The Nusselt number for 22 mm, 44 mm, and 88 mm thicknesses is 157.64%, 183.31%, and 218.60%, respectively, higher than the empty channel. The performance factor for 22 mm thick metal foam is 5.02% and 16.61% higher than for 44 mm and 88 mm thick metal foam, respectively. Hence, it is found that metal foam can be an excellent option for heat transfer enhancement in SAH, if it is designed properly.

Suggested Citation

  • Rawal Diganjit & N. Gnanasekaran & Moghtada Mobedi, 2022. "Numerical Study for Enhancement of Heat Transfer Using Discrete Metal Foam with Varying Thickness and Porosity in Solar Air Heater by LTNE Method," Energies, MDPI, vol. 15(23), pages 1-28, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8952-:d:985285
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    References listed on IDEAS

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    1. Anirudh, K. & Dhinakaran, S., 2020. "Performance improvement of a flat-plate solar collector by inserting intermittent porous blocks," Renewable Energy, Elsevier, vol. 145(C), pages 428-441.
    2. Trilok G & Kurma Eshwar Sai Srinivas & Devika Harikrishnan & Gnanasekaran N & Moghtada Mobedi, 2022. "Correlations and Numerical Modeling of Stacked Woven Wire-Mesh Porous Media for Heat Exchange Applications," Energies, MDPI, vol. 15(7), pages 1-25, March.
    3. Yadav, Anil Singh & Bhagoria, J.L., 2013. "Heat transfer and fluid flow analysis of solar air heater: A review of CFD approach," Renewable and Sustainable Energy Reviews, Elsevier, vol. 23(C), pages 60-79.
    4. Jadhav, Prakash H. & Gnanasekaran, N. & Mobedi, Moghtada, 2023. "Analysis of functionally graded metal foams for the accomplishment of heat transfer enhancement under partially filled condition in a heat exchanger," Energy, Elsevier, vol. 263(PA).
    5. Jouybari, H. Javaniyan & Saedodin, S. & Zamzamian, A. & Nimvari, M. Eshagh & Wongwises, S., 2017. "Effects of porous material and nanoparticles on the thermal performance of a flat plate solar collector: An experimental study," Renewable Energy, Elsevier, vol. 114(PB), pages 1407-1418.
    6. Singh, Satyender, 2020. "Experimental and numerical investigations of a single and double pass porous serpentine wavy wiremesh packed bed solar air heater," Renewable Energy, Elsevier, vol. 145(C), pages 1361-1387.
    7. Trilok G & N Gnanasekaran & Moghtada Mobedi, 2021. "Various Trade-Off Scenarios in Thermo-Hydrodynamic Performance of Metal Foams Due to Variations in Their Thickness and Structural Conditions," Energies, MDPI, vol. 14(24), pages 1-23, December.
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    Cited by:

    1. Rawal Diganjit & Nagaranjan Gnanasekaran & Moghtada Mobedi, 2023. "Thermohydraulic Efficiency of a Solar Air Heater in the Presence of Graded Aluminium Wire Mesh—A Combined Experimental–Numerical Study," Energies, MDPI, vol. 16(15), pages 1-32, July.

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