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Overview of V-RIB geometries in solar air heater and performance evaluation of a new V-RIB geometry

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  • Jain, Piyush Kumar
  • Lanjewar, Atul

Abstract

Artificial roughness in solar air heater is useful technique to enhance the heat transfer rate. Investigators have always strived to improve the performance of V-rib geometry. This paper presents overview of V-rib roughness geometries used in solar air heater and also evaluates performance of a new V-rib with symmetrical gap and staggered rib geometry. Proposed roughness has fixed relative staggered rib pitch (P'/P) as 0.65, relative gap width (g/e) as 4, relative staggered rib size (w/e) as 4 and angle of attack (α) as 60°. Number of gaps on each side of V-rib was kept as 3. Relative roughness pitch (P/e) and Reynolds number (Re) were varied from 10 to 16 and 3000 to 14,000 respectively. Four rib roughened plates having V-rib with the symmetrical gap and staggered rib geometry with relative roughness pitch (P/e) of 10, 12, 14, and 16 were tested. Maximum enhancement in Nusselt number and friction factor were found to be 2.30 and 3.18 times respectively for relative roughness pitch of 12. Thermo-hydraulic performance parameter is maximum for relative roughness pitch of 12. Thermo-hydraulic comparison indicates that the present roughness geometry has better performance for Reynolds number range of 3000–14,000 than existing V-rib geometries.

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  • Jain, Piyush Kumar & Lanjewar, Atul, 2019. "Overview of V-RIB geometries in solar air heater and performance evaluation of a new V-RIB geometry," Renewable Energy, Elsevier, vol. 133(C), pages 77-90.
    • Handle: RePEc:eee:renene:v:133:y:2019:i:c:p:77-90
    DOI: 10.1016/j.renene.2018.10.001
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    References listed on IDEAS

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    Cited by:

    1. Sivakandhan, C. & Arjunan, T.V. & Matheswaran, M.M., 2020. "Thermohydraulic performance enhancement of a new hybrid duct solar air heater with inclined rib roughness," Renewable Energy, Elsevier, vol. 147(P1), pages 2345-2357.
    2. 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.
    3. Nidhul, Kottayat & Kumar, Sachin & Yadav, Ajay Kumar & Anish, S., 2020. "Enhanced thermo-hydraulic performance in a V-ribbed triangular duct solar air heater: CFD and exergy analysis," Energy, Elsevier, vol. 200(C).
    4. Mgbemene, Chigbo & Jacobs, Ifeanyi & Okoani, Anthony & Ononiwu, Ndudim, 2022. "Experimental investigation on the performance of aluminium soda can solar air heater," Renewable Energy, Elsevier, vol. 195(C), pages 182-193.
    5. Vengadesan, Elumalai & Senthil, Ramalingam, 2020. "A review on recent developments in thermal performance enhancement methods of flat plate solar air collector," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    6. Karmveer & Naveen Kumar Gupta & Tabish Alam & Raffaello Cozzolino & Gino Bella, 2022. "A Descriptive Review to Access the Most Suitable Rib’s Configuration of Roughness for the Maximum Performance of Solar Air Heater," Energies, MDPI, vol. 15(8), pages 1-46, April.

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