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Numerical and experimental study of the heat transfer and hydraulic performance of solar air heaters with different baffle positions

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  • Bensaci, Charaf-Eddine
  • Moummi, Abdelhafid
  • Sanchez de la Flor, Francisco J.
  • Rodriguez Jara, Enrique A.
  • Rincon-Casado, Alejandro
  • Ruiz-Pardo, Alvaro

Abstract

This study presents the results of a numerical and experimental study of the position of the baffles in a solar air heater in order to improve its thermal and hydraulic performance. The numerical study was performed on four cases corresponding to different placements of baffles with Reynolds numbers ranging from 2370 to 8340. The experimental model of the solar air heater was designed, manufactured and used for the validation of the numerical model. The new baffle placements show that effective thermo-hydraulic performance is not just a function of the shape or changes in the geometric parameters of the baffles. The correct placement of baffles dramatically improves the thermo-hydraulic performance of solar air heaters. The effect of baffle positions on local convective heat transfer coefficients has been discussed. The optimum thermo-hydraulic performance factor is achieved in the case where the baffles are located in the first part of air channel which occupies 50% of the solar air heater.

Suggested Citation

  • Bensaci, Charaf-Eddine & Moummi, Abdelhafid & Sanchez de la Flor, Francisco J. & Rodriguez Jara, Enrique A. & Rincon-Casado, Alejandro & Ruiz-Pardo, Alvaro, 2020. "Numerical and experimental study of the heat transfer and hydraulic performance of solar air heaters with different baffle positions," Renewable Energy, Elsevier, vol. 155(C), pages 1231-1244.
    • Handle: RePEc:eee:renene:v:155:y:2020:i:c:p:1231-1244
    DOI: 10.1016/j.renene.2020.04.017
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    Cited by:

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    3. Ji-Suk Yu & Jin-Hee Kim & Jun-Tae Kim, 2020. "Effect of Triangular Baffle Arrangement on Heat Transfer Enhancement of Air-Type PVT Collector," Sustainability, MDPI, vol. 12(18), pages 1-13, September.
    4. Tandel, Hiren U. & Modi, Kalpesh V., 2022. "Experimental assessment of double-pass solar air heater by incorporating perforated baffles and solar water heating system," Renewable Energy, Elsevier, vol. 183(C), pages 385-405.
    5. Hassan, Ahmad Kamal & Muzaffarul Hasan, M. & Emran Khan, Mohammad, 2021. "Parametric investigation and correlation development for heat transfer and friction factor in multiple arc dimple roughened solar air duct," Renewable Energy, Elsevier, vol. 174(C), pages 403-425.
    6. Mir Waqas Alam & Basma Souayeh, 2021. "Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube," Sustainability, MDPI, vol. 13(11), pages 1-30, June.
    7. Ali Hassan & Ali M. Nikbakht & Sabrina Fawzia & Prasad Yarlagadda & Azharul Karim, 2024. "A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis," Energies, MDPI, vol. 17(7), pages 1-47, March.
    8. Khanlari, Ataollah & Sözen, Adnan & Afshari, Faraz & Tuncer, Azim Doğuş, 2021. "Energy-exergy and sustainability analysis of a PV-driven quadruple-flow solar drying system," Renewable Energy, Elsevier, vol. 175(C), pages 1151-1166.

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