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CFD analysis of rib roughened solar evacuated tube collector for air heating

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  • Singla, Mohit
  • Hans, Vishavjeet Singh
  • Singh, Sukhmeet

Abstract

Using Computational Fluid Dynamics analysis, thermo-hydraulic performance of a rib roughened solar evacuated tube collector has been evaluated for different relative roughness pitch and mass flow rate values. Half portion of absorber tube is roughened and heated uniformly with a heat input of 1000 W/m2. The investigated roughness geometry parameters include relative roughness pitch (P/e) of the order 6–12 whereas relative roughness height is having a fixed value of 0.071. Reynolds number was varied from 2500 to 8000. In contrast to a smooth solar evacuated tube collector, Nusselt number and frictional resistance of a roughened solar evacuated tube collector increased by 1.88 and 2.89 times respectively. Thermo-hydraulic performance parameter of roughened solar evacuated tube collector was found to be 1.36 corresponding to Reynolds number and P/e values of 8000 and 10 respectively which indicates considerable benefit of applying rib roughness in a solar evacuated tube collector.

Suggested Citation

  • Singla, Mohit & Hans, Vishavjeet Singh & Singh, Sukhmeet, 2022. "CFD analysis of rib roughened solar evacuated tube collector for air heating," Renewable Energy, Elsevier, vol. 183(C), pages 78-89.
    • Handle: RePEc:eee:renene:v:183:y:2022:i:c:p:78-89
    DOI: 10.1016/j.renene.2021.10.055
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    References listed on IDEAS

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    Cited by:

    1. Tuncer, Azim Doğuş & Khanlari, Ataollah, 2023. "Improving the performance of a triple-flow solar air collector using recyclable aluminum cans as extended heat transfer surfaces: An energetic, exergetic, economic and environmental survey," Energy, Elsevier, vol. 282(C).
    2. Fan, Leilei & Sun, Zhilin & Wan, Wuyi & Zhang, Boran, 2024. "Improved model for thermal transmission in evacuated tubes: Effect of non-uniform heat flux and circumferential conduction," Energy, Elsevier, vol. 297(C).
    3. Kumar, Raj & Kumar, Sushil & Nadda, Rahul & Kumar, Khusmeet & Goel, Varun, 2022. "Thermo-hydraulic efficiency and correlation development of an indoor designed jet impingement solar thermal collector roughened with discrete multi-arc ribs," Renewable Energy, Elsevier, vol. 189(C), pages 1259-1277.
    4. Al-Zahrani, Salman, 2023. "Thermal performance augmentation of solar air heater with curved path," Energy, Elsevier, vol. 284(C).

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