Volume 22 Issue 4
Aug.  2022
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YUAN Yu-peng, CUI Wei-yi, SHEN Hui, ZOU Zhi-xi, GUO Wei-yong. Numerical simulation of leakage and diffusion of hydrogen in cabin of fuel cell ship[J]. Journal of Traffic and Transportation Engineering, 2022, 22(4): 196-209. doi: 10.19818/j.cnki.1671-1637.2022.04.015
Citation: YUAN Yu-peng, CUI Wei-yi, SHEN Hui, ZOU Zhi-xi, GUO Wei-yong. Numerical simulation of leakage and diffusion of hydrogen in cabin of fuel cell ship[J]. Journal of Traffic and Transportation Engineering, 2022, 22(4): 196-209. doi: 10.19818/j.cnki.1671-1637.2022.04.015

Numerical simulation of leakage and diffusion of hydrogen in cabin of fuel cell ship

doi: 10.19818/j.cnki.1671-1637.2022.04.015
Funds:

National Key Research and Development Program of China 2021YFB2601603

More Information
  • Author Bio:

    YUAN Yu-peng(1980-), male, associate professor, PhD, ypyuan@whut.edu.cn

    GUO Wei-yong(1984-), male, assistant professor, 745028784@qq.com

  • Received Date: 2022-02-19
    Available Online: 2022-10-08
  • Publish Date: 2022-08-25
  • The leakage/diffusion laws and distributions of hydrogen in the compartments of a fuel cell ship under different conditions were studied by the software FLUENT. On the basis of the transient gas leakage and diffusion model, the numerical simulation method was employed to build a numerical leakage and diffusion model of hydrogen in the compartments of the ship, and the effects of different factors on hydrogen leakage and diffusion in the compartments, such as the leakage location, leakage aperture, and ventilation condition, were compared and analyzed. As a result, the diffusion patterns and distributions of hydrogen in the compartments of the ship under different conditions were obtained. Analysis results show that the leakage and diffusion process of hydrogen in a ship compartment includes the initial spray, buoyancy rise, and turbulent diffusion. The top corner of the fuel cell compartment and the upper part between each row of the fuel cell power generation system are the best locations for the hydrogen detection alarms, and hydrogen is more accumulated at the top of the compartment under different leakage conditions. The risks of different locations and different apertures of leakage holes are different at the beginning of the leakage, but the risk evolution patterns are similar with the continuation of the leakage, and the hydrogen concentration near the leakage point is close to 100% after about 60 s. The diffusion of hydrogen to other compartments can be significantly reduced by the installation of explosion-proof exhaust fans in the fuel cell compartment and the adoption of forced air extraction measures to speed up the hydrogen discharge. When the air extraction speed is 1 m·s-1, hydrogen is discharged from the fuel cell compartment to the outboard area of the ship, and no hydrogen is diffused into the control and passenger compartments. Hence, the safety of the control and passenger compartments can be effectively ensured. The diffusion of hydrogen to the stern, control, and passenger compartments, however, is accelerated by the forced air supply. Thus, the diffusion range of hydrogen is enlarged, and the risk of hydrogen leakage is aggravated.

     

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