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Thermal performance analysis of apex-up discrete arc ribs solar air heater-an experimental study

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  • Bhuvad, Sushant Suresh
  • Azad, Rajnish
  • Lanjewar, Atul

Abstract

The most efficient way to enhance the heat transfer performance of the Solar Air Heater (Sol-AHs) duct is by providing an artificial roughened plate. The present study compared the Thermo-hydraulic performance of a novel apex-up discrete arc rib absorber plate Solar Air Heaters (Sol-AHs) with existing best downstream flow ribs geometries. Furthermore, the parameters air flow angle of attack (α) of 30°, 45° and 60° and Reynolds number of 3000–14000 are examined by considering relative gap width (g/e) as 4, rib height to hydraulic diameter (e/Dh) as 0.045, a ratio of rib pitch to rib element diameter as 10, number of gaps as three. The results show that the new apex-up discrete arc rib absorber plates have superior thermal performance than the existing best apex-down ribs geometries. Maximum augmentation in Nu achieves an α of 30° that is 2.92 times the smooth plate. Thermo-hydraulic performance (THPP) is observed to be optimum at Re of 10000 and α of 30°. Correlation for heat transfer and roughness function obtained for varying air flow angle of attack.

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  • Bhuvad, Sushant Suresh & Azad, Rajnish & Lanjewar, Atul, 2022. "Thermal performance analysis of apex-up discrete arc ribs solar air heater-an experimental study," Renewable Energy, Elsevier, vol. 185(C), pages 403-415.
    • Handle: RePEc:eee:renene:v:185:y:2022:i:c:p:403-415
    DOI: 10.1016/j.renene.2021.12.037
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    References listed on IDEAS

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    1. Raj Kumar & Erdem Cuce & Sushil Kumar & Sashank Thapa & Paras Gupta & Bhaskar Goel & C. Ahamed Saleel & Saboor Shaik, 2022. "Assessment of the Thermo-Hydraulic Efficiency of an Indoor-Designed Jet Impingement Solar Thermal Collector Roughened with Single Discrete Arc-Shaped Ribs," Sustainability, MDPI, vol. 14(6), pages 1-18, March.
    2. Kumar, Dheeraj & Layek, Apurba, 2022. "Nusselt number and friction characteristics of solar air heater roughened with novel twisted V-shaped staggered ribs using liquid crystal thermography," Renewable Energy, Elsevier, vol. 201(P1), pages 651-666.
    3. Bhuvad, Sushant Suresh & Udayraj,, 2022. "Investigation of annual performance of a building shaded by rooftop PV panels in different climate zones of India," Renewable Energy, Elsevier, vol. 189(C), pages 1337-1357.

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