Transient analysis of a solid oxide fuel cell stack with crossflow configuration

2018 7th International Conference on Clean and Green Energy

能源学;生态环境科学

Yuan, P.^1 ; Liu, S.F.^1

Mechanical Engineering Department, Lee-Ming Institute of Technology, 22 Tailin Rd., Taishan 243, Taipei, Taiwan^1

关键词: Average current densities;    Commercial software;    Cross-flow configuration;    Governing equations;    Operating controls;    Solid oxide fuel cell stack;    Temperature differences;    Transient performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/154/1/012023/pdf
DOI  :  10.1088/1755-1315/154/1/012023

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This study investigates the transient response of the cell temperature and current density of a solid oxide fuel cell having 6 stacks with crossflow configuration. A commercial software repeatedly solves the governing equations of each stack, and get the convergent results of the whole SOFC stack. The preliminary results indicate that the average current density of each stack is similar to others, so the power output between different stacks are uniform. Moreover, the average cell temperature among stacks is different, and the central stacks have higher temperature due to its harder heat dissipation. For the operating control, the cell temperature difference among stacks is worth to concern because the temperature difference will be over 10 °C in the analysis case. The increasing of the inlet flow rate of the fuel and air will short the transient state, increase the average current density, and drop the cell temperature difference among the stacks. Therefore, the inlet flow rate is an important factor for transient performance of a SOFC stack.