频道(广播)
电解质
相对湿度
差速器(机械装置)
工作(物理)
化学计量学
流量(数学)
水运
电极
机械
计算机科学
生物系统
工艺工程
环境科学
材料科学
化学
热力学
水流
环境工程
电信
物理
工程类
物理化学
有机化学
生物
作者
L. M. Pant,Michael R. Gerhardt,Natalia Macauley,Rangachary Mukundan,Rodney L. Borup,Adam Z. Weber
标识
DOI:10.1016/j.electacta.2019.134963
摘要
Water management remains a key challenge in polymer-electrolyte fuel cells. In this work, a pseudo 3-D (1+2D) model is developed to account better for changes of water management along the channel, as well as verify the possibilities of using differential cells for data capture and translation to integral cell performance. An accurate 2-D membrane-electrode-assembly model is developed for differential cell modeling, which is combined with an along-the-channel stepping algorithm to account for down the channel changes in pressure, temperature, reactant concentration, and relative humidity. Variations in cell performance along the channel due to changes in operating conditions are characterized quantitatively and optimized, where drier feed conditions demonstratively require such an approach. Overall, the study identifies gaps between differential and integral cells including those related to flow velocity and highlights the need for better models to understand and link integral cell performance and water management.
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