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A review of turbulence promoters used in solar thermal systems

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  • Chamoli, Sunil
  • Thakur, N.S.
  • Saini, J.S.

Abstract

In order to enhance rate of heat transfer to flowing air in the duct of solar air heater and in heat exchanger or in cooling of turbine blade various turbulence generators viz. ribs, baffles and delta winglets are considered as an effective technique. Investigators reported various turbulence generators in literature for studying heat transfer, friction characteristics and flow pattern in heat exchanger and in solar air heater. In the present article an attempt has been made to categorize and review the reported turbulence generators used for heat transfer enhancement in heat exchanger and solar air heater and gives an approach for further research for forced convection from the surfaces with large scale roughness.

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  • Chamoli, Sunil & Thakur, N.S. & Saini, J.S., 2012. "A review of turbulence promoters used in solar thermal systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 3154-3175.
    • Handle: RePEc:eee:rensus:v:16:y:2012:i:5:p:3154-3175
    DOI: 10.1016/j.rser.2012.01.021
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    References listed on IDEAS

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    1. Kumar, Anil & Kim, Man-Hoe, 2016. "Thermohydraulic performance of rectangular ducts with different multiple V-rib roughness shapes: A comprehensive review and comparative study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 635-652.
    2. Singh, Sukhmeet & Chander, Subhash & Saini, J.S., 2015. "Thermo-hydraulic performance due to relative roughness pitch in V-down rib with gap in solar air heater duct—Comparison with similar rib roughness geometries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 1159-1166.
    3. Chamoli, Sunil, 2015. "Preference selection index approach for optimization of V down perforated baffled roughened rectangular channel," Energy, Elsevier, vol. 93(P2), pages 1418-1425.
    4. Singh, Amritpal & Singh, Sukhmeet, 2017. "CFD investigation on roughness pitch variation in non-uniform cross-section transverse rib roughness on Nusselt number and friction factor characteristics of solar air heater duct," Energy, Elsevier, vol. 128(C), pages 109-127.

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