Investigation of Current Density Effect on Water Vapor Concentration Profile along PEMFC Channels by TDLAS
Investigation of Current Density Effect on Water Vapor Concentration Profile along PEMFC Channels by TDLAS
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利用 TDLAS 研究电流密度对 PEMFC 通道水蒸气浓度分布的影响
DOI：
10.1299/jtst.3.94
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发表时间：
2008
影响因子：
1.2
通讯作者：
S. Hirai
中科院分区：
文献类型：
--
作者：
Y. Fujii;S. Tsushima;S. Hirai
在这篇文章中，我们应用可调谐二极管激光吸收光谱（TDLAS）技术来测量在运行的聚合物电解质膜燃料电池（PEMFC）的气体流动通道中的水蒸气浓度的变化。TDLAS测量提供了一种光学遥感检测水蒸气浓度的微小变化，表明在运行的PEMFC的电化学反应是不均匀的观察。我们在阳极和阴极的气体流动通道中随着电池电流密度的变化进行了TDLAS测量。我们观察到水蒸气浓度的增加，由于电化学反应沿着阴极通道以及沿着阳极通道从入口，这表明，产生的水通过两个通道排出。它还表明，较少的电化学反应中观察到的通道的上游，大概是由于较少的水合作用的膜，因为干燥的气体供应。
In this article, we applied tunable diode laser absorption spectroscopy (TDLAS) technique to measure variation of water vapor concentration in gas flow channels in an operating polymer electrolyte membrane fuel cell (PEMFC). TDLAS measurement offered an optical remote sensing to detect slight change of water vapor concentration, showing that electrochemical reaction in an operating PEMFC is not uniformly observed. We performed TDLAS measurement in gas flow channels in the anode and the cathode with variation of cell current density. We observed increase of water vapor concentration due to electrochemical reaction along the cathode channel as well as along the anode channel from the inlet, suggesting that generated water was exhausted through the both channels. It was also shown that less electrochemical reaction was observed in the upstream of the channel presumably due to less hydration of the membrane because of dry gas supply.