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Effect of Mechanical Ventilation on Accidental Hydrogen Releases—Large-Scale Experiments

Author

Listed:
  • Agnieszka W. Lach

    (Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Faculty of Technology, Natural Science and Maritime Science, Campus Porsgrunn, 3918 Porsgrunn, Norway)

  • André V. Gaathaug

    (Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Faculty of Technology, Natural Science and Maritime Science, Campus Porsgrunn, 3918 Porsgrunn, Norway)

Abstract

This paper presents a series of experiments on the effectiveness of existing mechanical ventilation systems during accidental hydrogen releases in confined spaces, such as underground garages. The purpose was to find the mass flow rate limit, hence the TPRD diameter limit, that will not require a change in the ventilation system. The experiments were performed in a 40 ft ISO container in Norway, and hydrogen gas was used in all experiments. The forced ventilation system was installed with a standard 315 mm diameter outlet. The ventilation parameters during the investigation were British Standard with 10 ACH and British Standard with 6 ACH. The hydrogen releases were obtained through 0.5 mm and 1 mm nozzles from different hydrogen reservoir pressures. Both types of mass flow, constant and blowdown, were included in the experimental matrix. The analysis of the hydrogen concentration of the created hydrogen cloud in the container shows the influence of the forced ventilation on hydrogen releases, together with TPRD diameter and reservoir pressure. The generated experimental data will be used to validate a CFD model in the next step.

Suggested Citation

  • Agnieszka W. Lach & André V. Gaathaug, 2021. "Effect of Mechanical Ventilation on Accidental Hydrogen Releases—Large-Scale Experiments," Energies, MDPI, vol. 14(11), pages 1-13, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:11:p:3008-:d:560180
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    Cited by:

    1. Shen, Yahao & Lv, Hong & Zheng, Tao & Liu, Yi & Zhou, Wei & Zhang, Cunman, 2023. "Temporal and spatial evolution of hydrogen leakage and diffusion from tube fittings on fuel cell vehicles under the effect of ambient wind," Renewable and Sustainable Energy Reviews, Elsevier, vol. 185(C).
    2. Shen, Yahao & Lv, Hong & Hu, Yaqi & Li, Jianwei & Lan, Hao & Zhang, Cunman, 2023. "Preliminary hazard identification for qualitative risk assessment on onboard hydrogen storage and supply systems of hydrogen fuel cell vehicles," Renewable Energy, Elsevier, vol. 212(C), pages 834-854.
    3. Hao Lan & Guiyun Wang & Kun Zhao & Yuntang He & Tianlei Zheng, 2022. "Review on the Hydrogen Dispersion and the Burning Behavior of Fuel Cell Electric Vehicles," Energies, MDPI, vol. 15(19), pages 1-13, October.

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