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Investigations on thermo-hydraulic performance due to flow-attack-angle in V-down rib with gap in a rectangular duct of solar air heater

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  • Singh, Sukhmeet
  • Chander, Subhash
  • Saini, J.S.

Abstract

In this investigation, thermo-hydraulic performance of rectangular ducts roughened with a new configuration of ‘V-down rib having gap’ on one wide wall is determined. Small symmetrical gap equal to rib height is created at the centre of both legs of V of continuous V-down rib. The duct has aspect ratio (AR) of 12 and the Reynolds number (Re) ranged from 3000 to 15,000. To simulate the indoor testing of solar air heater, the roughened side of rectangular duct is heated with constant heat flux electric heater while the other sides are insulated. The roughness has relative roughness height of 0.043 and relative roughness pitch of 8. Five rib roughened plates having flow-attack-angle (α) from 30° to 75° have been tested. The thermo-hydraulic performance parameter based on equal pumping power (η), friction factor (f) and Nusselt number (Nu), were found to be highest for α=60°. The results obtained at α=60° were compared with those of continuous V-down rib for same rib-roughness parameters.

Suggested Citation

  • Singh, Sukhmeet & Chander, Subhash & Saini, J.S., 2012. "Investigations on thermo-hydraulic performance due to flow-attack-angle in V-down rib with gap in a rectangular duct of solar air heater," Applied Energy, Elsevier, vol. 97(C), pages 907-912.
  • Handle: RePEc:eee:appene:v:97:y:2012:i:c:p:907-912
    DOI: 10.1016/j.apenergy.2011.11.090
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    References listed on IDEAS

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    Citations

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    Cited by:

    1. Varun Kumar B. & G. Manikandan & P. Rajesh Kanna & Dawid Taler & Jan Taler & Marzena Nowak-Ocłoń & Karol Mzyk & Hoong Thiam Toh, 2018. "A Performance Evaluation of a Solar Air Heater Using Different Shaped Ribs Mounted on the Absorber Plate—A Review," Energies, MDPI, Open Access Journal, vol. 11(11), pages 1-20, November.
    2. Luo, Lei & Wen, Fengbo & Wang, Lei & Sundén, Bengt & Wang, Songtao, 2016. "Thermal enhancement by using grooves and ribs combined with delta-winglet vortex generator in a solar receiver heat exchanger," Applied Energy, Elsevier, vol. 183(C), pages 1317-1332.
    3. Karwa, Rajendra & Chitoshiya, Girish, 2013. "Performance study of solar air heater having v-down discrete ribs on absorber plate," Energy, Elsevier, vol. 55(C), pages 939-955.
    4. Saxena, Abhishek & Varun, & El-Sebaii, A.A., 2015. "A thermodynamic review of solar air heaters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 863-890.
    5. Singh Yadav, Anil & Kumar Thapak, Manish, 2014. "Artificially roughened solar air heater: Experimental investigations," Renewable and Sustainable Energy Reviews, Elsevier, vol. 36(C), pages 370-411.
    6. Alam, Tabish & Saini, R.P. & Saini, J.S., 2014. "Use of turbulators for heat transfer augmentation in an air duct – A review," Renewable Energy, Elsevier, vol. 62(C), pages 689-715.
    7. Chauhan, Ranchan & Singh, Tej & Thakur, N.S. & Patnaik, Amar, 2016. "Optimization of parameters in solar thermal collector provided with impinging air jets based upon preference selection index method," Renewable Energy, Elsevier, vol. 99(C), pages 118-126.
    8. 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.
    9. 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.
    10. Alam, Tabish & Kim, Man-Hoe, 2018. "A comprehensive review on single phase heat transfer enhancement techniques in heat exchanger applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 813-839.
    11. Kuruneru, Sahan Trushad Wickramasooriya & Sauret, Emilie & Saha, Suvash Chandra & Gu, YuanTong, 2016. "Numerical investigation of the temporal evolution of particulate fouling in metal foams for air-cooled heat exchangers," Applied Energy, Elsevier, vol. 184(C), pages 531-547.
    12. Alam, Tabish & Kim, Man-Hoe, 2017. "A critical review on artificial roughness provided in rectangular solar air heater duct," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 387-400.
    13. 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).
    14. Ma, Ting & Wang, Qiu-wang & Zeng, Min & Chen, Yi-tung & Liu, Yang & Nagarajan, Vijaisri, 2012. "Study on heat transfer and pressure drop performances of ribbed channel in the high temperature heat exchanger," Applied Energy, Elsevier, vol. 99(C), pages 393-401.
    15. Dezan, Daniel J. & Rocha, André D. & Ferreira, Wallace G., 2020. "Parametric sensitivity analysis and optimisation of a solar air heater with multiple rows of longitudinal vortex generators," Applied Energy, Elsevier, vol. 263(C).
    16. Sharma, Sanjay K. & Kalamkar, Vilas R., 2015. "Thermo-hydraulic performance analysis of solar air heaters having artificial roughness–A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 413-435.
    17. Sahu, Mukesh Kumar & Prasad, Radha Krishna, 2017. "Thermohydraulic performance analysis of an arc shape wire roughened solar air heater," Renewable Energy, Elsevier, vol. 108(C), pages 598-614.
    18. Rajaseenivasan, T. & Srinivasan, S. & Srithar, K., 2015. "Comprehensive study on solar air heater with circular and V-type turbulators attached on absorber plate," Energy, Elsevier, vol. 88(C), pages 863-873.

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