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Impact of the geometry of divergent chimneys on the power output of a solar chimney power plant

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  • Hu, Siyang
  • Leung, Dennis Y.C.
  • Chan, John C.Y.

Abstract

Divergent chimney is proposed to be an alternative for Solar Chimney Power Plants (SCPPs) because of their reported remarkable improvement in power output over cylindrical chimneys. However, the power output of divergent SCPPs in those studies changed from several percentage to >100 times higher than that of cylindrical ones. In our hypothesis, this large deviation was related to the various configurations of the SCPPs examined. Therefore, this paper examined comprehensively the effect of geometry of divergent chimneys on system performance of SCPPs to further reveal their hydrodynamic features. The geometric parameters under investigation included the area ratio (AR) of chimney exit over entrance, the divergent angle (DA) of chimney wall and the size of system. Our numerical simulations indicated a parabolic tendency in the performance of the divergent SCPPs when increasing the ARs (or DAs). Reasons for this tendency were proposed based on its hydro- and thermo-interaction. Furthermore, the normalized power output showed good consistency among the SCPPs with different sizes when geometric similarity was adopted to the entire system geometry. The similar normalized outputs found were almost insensitive to the variations in the solar insolation. These outcomes would be a valuable reference for designing SCPPs with divergent chimneys.

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  • Hu, Siyang & Leung, Dennis Y.C. & Chan, John C.Y., 2017. "Impact of the geometry of divergent chimneys on the power output of a solar chimney power plant," Energy, Elsevier, vol. 120(C), pages 1-11.
    • Handle: RePEc:eee:energy:v:120:y:2017:i:c:p:1-11
    DOI: 10.1016/j.energy.2016.12.098
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    Cited by:

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    3. Habibollahzade, Ali, 2019. "Employing photovoltaic/thermal panels as a solar chimney roof: 3E analyses and multi-objective optimization," Energy, Elsevier, vol. 166(C), pages 118-130.
    4. Hu, Siyang & Leung, Dennis Y.C. & Chan, John C.Y., 2017. "Numerical modelling and comparison of the performance of diffuser-type solar chimneys for power generation," Applied Energy, Elsevier, vol. 204(C), pages 948-957.
    5. Vargas-López, R. & Xamán, J. & Hernández-Pérez, I. & Arce, J. & Zavala-Guillén, I. & Jiménez, M.J. & Heras, M.R., 2019. "Mathematical models of solar chimneys with a phase change material for ventilation of buildings: A review using global energy balance," Energy, Elsevier, vol. 170(C), pages 683-708.
    6. Wei, Haibin & Yang, Dong & Guo, Yuanhao & Chen, Mengqian, 2018. "Coupling of earth-to-air heat exchangers and buoyancy for energy-efficient ventilation of buildings considering dynamic thermal behavior and cooling/heating capacity," Energy, Elsevier, vol. 147(C), pages 587-602.
    7. Rushdi, Mostafa A. & Yoshida, Shigeo & Watanabe, Koichi & Ohya, Yuji, 2021. "Machine learning approaches for thermal updraft prediction in wind solar tower systems," Renewable Energy, Elsevier, vol. 177(C), pages 1001-1013.
    8. Das, Pritam & Chandramohan, V.P., 2019. "Computational study on the effect of collector cover inclination angle, absorber plate diameter and chimney height on flow and performance parameters of solar updraft tower (SUT) plant," Energy, Elsevier, vol. 172(C), pages 366-379.
    9. Nirmalendu Biswas & Dipak Kumar Mandal & Sharmistha Bose & Nirmal K. Manna & Ali Cemal Benim, 2023. "Experimental Treatment of Solar Chimney Power Plant—A Comprehensive Review," Energies, MDPI, vol. 16(17), pages 1-41, August.

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