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Investigation on performance enhancement due to staggered piece in a broken arc rib roughened solar air heater duct

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  • Gill, R.S.
  • Hans, V.S.
  • Saini, J.S.
  • Singh, Sukhmeet

Abstract

This paper presents an experimental investigation on heat transfer and friction factor characteristics of solar air heater duct whose absorber is roughened with “broken arc rib combined with staggered rib piece”. The duct has aspect ratio of 12 and the absorber is heated with uniform heat flux while others three walls are insulated. The rib roughness has fixed relative staggered rib position, relative roughness height, relative gap size, relative gap position, arc angle and relative roughness pitch of 0.4, 0.043, 1.0, 0.65, 30° and 10 respectively. The relative staggered rib size and Reynolds number were varied from 1 to 6 and 2000 to 16,000 respectively. The effect of staggered rib on the flow pattern has also been observed using ANSYS Academic Research CFD 15.0. The maximum enhancement in Nusselt number and friction factor over that of broken arc rib roughened duct under similar flow and boundary conditions has been found to be 2.60 and 2.27 times respectively. The corresponding enhancements over that of smooth duct are 3.06 and 2.50 times respectively. The thermo-hydraulic performance of duct roughened with present rib roughness has been considerably enhanced and was found to be highest for relative staggered rib size of 4.

Suggested Citation

  • Gill, R.S. & Hans, V.S. & Saini, J.S. & Singh, Sukhmeet, 2017. "Investigation on performance enhancement due to staggered piece in a broken arc rib roughened solar air heater duct," Renewable Energy, Elsevier, vol. 104(C), pages 148-162.
    • Handle: RePEc:eee:renene:v:104:y:2017:i:c:p:148-162
    DOI: 10.1016/j.renene.2016.12.002
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    References listed on IDEAS

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    5. Kumar, Anil & Saini, R.P. & Saini, J.S., 2013. "Development of correlations for Nusselt number and friction factor for solar air heater with roughened duct having multi v-shaped with gap rib as artificial roughness," Renewable Energy, Elsevier, vol. 58(C), pages 151-163.
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    7. Singh, Sukhmeet & Singh, Bikramjit & Hans, V.S. & Gill, R.S., 2015. "CFD (computational fluid dynamics) investigation on Nusselt number and friction factor of solar air heater duct roughened with non-uniform cross-section transverse rib," Energy, Elsevier, vol. 84(C), pages 509-517.
    8. Deo, Narinderpal Singh & Chander, Subhash & Saini, J.S., 2016. "Performance analysis of solar air heater duct roughened with multigap V-down ribs combined with staggered ribs," Renewable Energy, Elsevier, vol. 91(C), pages 484-500.
    9. Kumar, Anil & Saini, R.P. & Saini, J.S., 2012. "Heat and fluid flow characteristics of roughened solar air heater ducts – A review," Renewable Energy, Elsevier, vol. 47(C), pages 77-94.
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    Cited by:

    1. 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.
    2. Singh, Inderjeet & Vardhan, Sachit, 2021. "Experimental investigation of an evacuated tube collector solar air heater with helical inserts," Renewable Energy, Elsevier, vol. 163(C), pages 1963-1972.
    3. Kumar, Rajneesh & Kumar, Anoop & Goel, Varun, 2019. "Performance improvement and development of correlation for friction factor and heat transfer using computational fluid dynamics for ribbed triangular duct solar air heater," Renewable Energy, Elsevier, vol. 131(C), pages 788-799.
    4. Sanjeev Kumar Yadav & Atul Lanjewar, 2023. "Experimental analysis of solar air heater duct with discrete arc-pattern combined staggered element roughness on absorber plate," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 25(8), pages 8651-8675, August.
    5. Thakur, Deep Singh & Khan, Mohd. Kaleem & Pathak, Manabendra, 2017. "Solar air heater with hyperbolic ribs: 3D simulation with experimental validation," Renewable Energy, Elsevier, vol. 113(C), pages 357-368.
    6. Singh Bisht, Vijay & Kumar Patil, Anil & Gupta, Anirudh, 2018. "Review and performance evaluation of roughened solar air heaters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 954-977.
    7. 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.

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