Precise control of operating parameters such as gas
flow rate, pressure and humidity in the hydrogen supply system is essential for
ensuring long-term stable operation of proton exchange membrane fuel cell (PEMFC)
systems. Given the complexity and variability of components within the hydrogen
circulation loop, the impact of different operating parameters and conditions
on the components was studied. Based on the actual hydrogen stoichiometry
required by the fuel cell stack and the permissible nitrogen concentration in
the anode gas flow, the control strategy was optimized and experimentally
validated. The results indicate that increasing the hydrogen pressure at the
stack anode inlet and the speed of hydrogen pump can enhance the hydrogen
stoichiometric ratio, while increasing the frequency of purge and drainage
effectively can reduce nitrogen concentration in the stack anode. Additionally,
load changing rate has a relatively minor effect on the flow rates and
concentrations of hydrogen and nitrogen in the hydrogen circulation loop. The
results provide a theoretical foundation and practical guidance for the control
strategy optimization of hydrogen supply system and the operational efficiency
and stability improvement of PEMFC systems.
WEI Xiaotong, LU Yuhang, KONG Hongbing, LIU Yu, HU Jun
. Exploration and Optimization of Control Strategy for
Hydrogen Recirculation Loop in Fuel Cell[J]. Vehicle Engine, 2025
, 0(5)
: 81
.
DOI: 10.3969/j.issn.1001-2222.2025.05.011
