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Investigation of natural ventilation performance of large space circular coal storage dome

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An Erratum to this article was published on 18 November 2020

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Abstract

Large space circular coal storage dome (LSCCSD) offers an environmental and dependable alternative to open stockpiles, and it has been consequently widely applied in China. However, due to the lack of scientific guidelines, its natural ventilation performance is lower than expected. Natural ventilation potential strongly depends on the roof geometry and opening mode, which have not yet been investigated for LSCCSD. This paper presents a detailed evaluation of the impact of dome geometry (rise span ratio), opening height, and opening modes on the ventilation performance of LSCCSD. The evaluation is based on computational fluid dynamics (CFD) methods and is validated by available wind tunnel testing. We employed three evaluation indicators, which are wind pressure coefficient, effective ventilation rate, and wind speed ratio. The results demonstrate that the rise span ratio has a significant effect on the wind pressure difference and the effective ventilation rate increases by approximately 9%–42% with a single-annular opening. When double-annular openings are set in a strong positive pressure zone, the effective ventilation rate increases by 100% and the average wind speed ratio increases by 50%. When it is compared with single one with similar opening height, the effective ventilation rate increases by 25%. The optimum natural ventilation performance for LSCCSD is achieved at a rise span ratio of 0.37. In addition, the lateral middle opening is kept higher than the ridge top of the coal pile. The proposed evaluation approach and design parameters provided instructive information in the building design and ventilation control for LSCCSDs.

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Authors and Affiliations

  1. Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, 100124, China

    Yaohua Hou, Chao Chen & Yu Zhou

  2. Department of Fire Commanding, China People’s Police University, Langfang, 065000, China

    Yaohua Hou

  3. Huadian Heavy Industries Co., Ltd., Beijing, 100070, China

    Zhixiang Yang

  4. Bartlett School of Construction and Project Management, University College London, WC1E 7HB, London, UK

    Shen Wei

Authors
  1. Yaohua Hou
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  2. Chao Chen
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  3. Yu Zhou
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  4. Zhixiang Yang
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  5. Shen Wei
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Correspondence to Chao Chen.

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Hou, Y., Chen, C., Zhou, Y. et al. Investigation of natural ventilation performance of large space circular coal storage dome. Build. Simul. 14, 1077–1093 (2021). https://doi.org/10.1007/s12273-020-0700-8

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  • DOI: https://doi.org/10.1007/s12273-020-0700-8

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