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Solar chimney in tunnel considering energy-saving and fire safety

Author

Listed:
  • Cheng, Xudong
  • Shi, Zhicheng
  • Nguyen, Kate
  • Zhang, Lihai
  • Zhou, Yong
  • Zhang, Guomin
  • Wang, Jinhui
  • Shi, Long

Abstract

Although solar chimney as a reliable passive renewable energy system has been widely adopted in buildings, its application in the tunnel is so far limited. By developing a validated numerical model, this study systematically investigated four critical factors that govern the effectiveness of solar chimney in tunnel applications, such as cavity height (hc), cavity gap (L), solar radiation, and fire size. It was known that the chimney height in tunnel shows a relatively higher impact on the natural ventilation when comparing to the applications in building, but in an opposite position for the solar radiation. The natural ventilation rate is proportional to hc0.69 in the tunnel, but the power is between 0.5 and 2/3 for building applications. The power for solar radiation in tunnel is 0.34, where it is 0.572 for building. It was obtained from an orthogonal analysis that chimney height presents a relatively higher impact on the natural ventilation performance of a solar chimney in the tunnel, but it shows an opposite phenomenon under the smoke exhaustion model. Under both natural ventilation and smoke exhaustion modes, chimney height and cavity gap show relatively stronger influence on the performance than that from the solar radiation. A theoretical model was also developed that considers both the vertically linear and horizontally parabolic temperature distributions inside the chimney cavity. The predictions when considering both distributions agree reasonably well with those numerical results, which drops about 20.6% when comparing to the predictions of those traditional models without the considerations.

Suggested Citation

  • Cheng, Xudong & Shi, Zhicheng & Nguyen, Kate & Zhang, Lihai & Zhou, Yong & Zhang, Guomin & Wang, Jinhui & Shi, Long, 2020. "Solar chimney in tunnel considering energy-saving and fire safety," Energy, Elsevier, vol. 210(C).
    • Handle: RePEc:eee:energy:v:210:y:2020:i:c:s0360544220317096
    DOI: 10.1016/j.energy.2020.118601
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    References listed on IDEAS

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    Cited by:

    1. Huang, Youbo & Liu, Xi & Shi, Long & Dong, Bingyan & Zhong, Hua, 2023. "Enhancing solar chimney performance in urban tunnels: Investigating the impact factors through experimental and theoretical model analysis," Energy, Elsevier, vol. 282(C).
    2. Zhang, Haihua & Tao, Yao & Zhang, Guomin & Li, Jie & Setunge, Sujeeva & Shi, Long, 2022. "Impacts of storey number of buildings on solar chimney performance: A theoretical and numerical approach," Energy, Elsevier, vol. 261(PA).
    3. Tao, Yao & Fang, Xiang & Chew, Michael Yit Lin & Zhang, Lihai & Tu, Jiyuan & Shi, Long, 2021. "Predicting airflow in naturally ventilated double-skin facades: theoretical analysis and modelling," Renewable Energy, Elsevier, vol. 179(C), pages 1940-1954.
    4. Zhang, Haihua & Yang, Dong & Tam, Vivian W.Y. & Tao, Yao & Zhang, Guomin & Setunge, Sujeeva & Shi, Long, 2021. "A critical review of combined natural ventilation techniques in sustainable buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    5. Dong, Qichang & Zhao, Xiaoqing & Song, Ye & Qi, Jiacheng & Shi, Long, 2024. "Determining the potential risks of naturally ventilated double skin façades," Renewable and Sustainable Energy Reviews, Elsevier, vol. 191(C).
    6. Siphiwe Mdlalose & Sipho Sibanda & Tilahun Workneh & Mark Laing, 2022. "Innovative Low-Cost Naturally Ventilated Maize Seed Storage System," Journal of Agriculture and Crops, Academic Research Publishing Group, vol. 8(1), pages 39-49, 01-2022.
    7. Wang, Qingyuan & Zhang, Guomin & Wu, Qihong & Li, Wenyuan & Shi, Long, 2022. "A combined wall and roof solar chimney in one building," Energy, Elsevier, vol. 240(C).
    8. Tao, Yao & Yan, Yihuan & Chew, Michael Yit Lin & Tu, Jiyuan & Shi, Long, 2023. "A theoretical model of natural ventilation enhanced by solar thermal energy in double-skin façade," Energy, Elsevier, vol. 276(C).

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