|Table of Contents|

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

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2022年04期
Page:
196-209
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Numerical simulation of leakage and diffusion of hydrogen in cabin of fuel cell ship
Author(s):
YUAN Yu-peng1; 2; 3;  CUI Wei-yi1; 2;  SHEN Hui1; 2;  ZOU Zhi-xi4;  GUO Wei-yong5
(1. School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063,Hubei, China; 2. National Engineering Research Center for Water Transport Safety, Wuhan University of Technology, Wuhan 430063, Hubei, China; 3. Academician Workstation of China COSCO Shipping Co., Ltd., Shanghai 200135, China; 4. COSCO Shipping Heavy Industry(Zhoushan)Co., Ltd.,Zhoushan 316131, Zhejiang, China;
Keywords:
fuel cell ship;  hydrogen fuel;  leakage;  numerical simulation;  concentration distribution;  risk prediction
PACS:
U662
DOI:
10.19818/j.cnki.1671-1637.2022.04.015
Abstract:
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. 3 tabs, 22 figs, 31 refs.

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Last Update: 2022-09-01