反应物化学计量比对阶梯流道URFC性能影响

Effects of Reactants Stoichiometry Ratio on URFC Performance With Stepped Flow Channels

本文基于一个两相、非等温模型,探究了燃料电池模式的化学计量比对一体式再生燃料电池性能的影响。结果表明,在燃料电池模式下提高反应物的化学计量比有利于促进传质与排水,但消耗的泵功会持续增加,因此电池性能的提升率随化学计量比的增加呈先上升后下降的趋势。在本文的运行工况下,当化学计量比为1.5时,燃料电池模式的净输出功最高;此外,在电池饥饿程度较高时,将化学计量比设置为1.5对充放电循环效率的提升率最高。

This work investigates the impact of stoichiometry ratio on the performance of a unitized 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 stoichiometry 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.