Effects of Reactants Stoichiometry Ratio on URFC Performance With Stepped Flow Channels
This work investigates the impact of stoichiometry ratio on the performance of a uni-tized regenerative fuel cell using a two-phase,non-isothermal model.Results indicate that increasing the stoichiometry ratio improves mass transfer and water discharge,but also increases pump work.Therefore,the performance enhancement rate initially increases and then declines with higher sto-ichiometry ratios.The study found that a stoichiometry ratio of 1.5 achieves the maximum net output power,and adjusts the highest round-trip energy efficiency during high levels of starvation.
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