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The Stack Effect on the Thermal-Fluid Behaviour of a Solar Collector

Author

Listed:
  • Alok Dhaundiyal

    (Deartment of Energetics, Institute of Process Engineering, Hungarian University of Agriculture and Life Sciences, 2100 Godollo, Pest County, Hungary)

  • Gedion Habtay Gebremicheal

    (Doctoral School of Mechanical Engineering, Hungarian University of Agriculture and Life Sciences, 2100 Godollo, Pest County, Hungary)

Abstract

The article investigates the thermal behaviour of a solar collector retrofitted with a natural draught unit. The objective of this work is to draw a comparative line between a system that is equipped with a circular vertical channel and the conventional one. The effectiveness of the solar heating system and how to further improve the prevailing system are examined in this study. The flat plate solar collector was used to assess the dynamics of the system. The Hottel–Whillier–Bliss equation was used to obtain the useful heat gain rate. The instantaneous collector efficiency was reduced by 22.84%. The net heat loss encountered with natural draught was augmented by 10.89%. The net pressure drop along the length of the collector was increased when a solar collector related to the circular chimney. The stagnant temperature of the collector with the natural draught was decreased by 3.20%. The heat loss to the surrounding was computed to be 33.94% of the net energy received by a solar collector connected with the circular stack. The Fanning friction factor for airflow was reduced in the system equipped with natural draught. The static pressure was marginally dropped at the inlet, whereas it was steeply increased at the outlet of the solar collector. The static pressure would be the same for both systems at collector length l = 0.84 m. The inference can be deducted from the comparative analysis that the air stream flow behind the collector plate and could provide better prospects for a collector unit equipped with natural draught at the exhaust end of the solar dryer.

Suggested Citation

  • Alok Dhaundiyal & Gedion Habtay Gebremicheal, 2022. "The Stack Effect on the Thermal-Fluid Behaviour of a Solar Collector," Energies, MDPI, vol. 15(3), pages 1-18, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:1188-:d:743121
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    References listed on IDEAS

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    1. El-Sebaii, A.A. & Al-Snani, H., 2010. "Effect of selective coating on thermal performance of flat plate solar air heaters," Energy, Elsevier, vol. 35(4), pages 1820-1828.
    2. Koca, Ahmet & Oztop, Hakan F. & Koyun, Tansel & Varol, Yasin, 2008. "Energy and exergy analysis of a latent heat storage system with phase change material for a solar collector," Renewable Energy, Elsevier, vol. 33(4), pages 567-574.
    3. Ural, Tolga, 2019. "Experimental performance assessment of a new flat-plate solar air collector having textile fabric as absorber using energy and exergy analyses," Energy, Elsevier, vol. 188(C).
    4. Mohammadi, K. & Sabzpooshani, M., 2013. "Comprehensive performance evaluation and parametric studies of single pass solar air heater with fins and baffles attached over the absorber plate," Energy, Elsevier, vol. 57(C), pages 741-750.
    5. Nowzari, Raheleh & Aldabbagh, L.B.Y. & Egelioglu, F., 2014. "Single and double pass solar air heaters with partially perforated cover and packed mesh," Energy, Elsevier, vol. 73(C), pages 694-702.
    6. Karim, Md Azharul & Hawlader, M.N.A, 2006. "Performance investigation of flat plate, v-corrugated and finned air collectors," Energy, Elsevier, vol. 31(4), pages 452-470.
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    Cited by:

    1. Alok Dhaundiyal, 2022. "Developing a Grey Forecasting Model for the Air Flowing across the Parallel Plate Duct," Energies, MDPI, vol. 15(15), pages 1-19, July.
    2. Alok Dhaundiyal, 2023. "Thermo-Statistical Investigation of the Solar Air Collector Using Least Angle Regression," Energies, MDPI, vol. 16(5), pages 1-21, March.

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