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Combined visualization study on PEFC

PEFC的联合可视化研究

基本信息

批准号：
18560736
负责人：
MURAHASHI Toshiaki
金额：
$ 0.86万
依托单位：
Fukui University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560736/
关键词：
polymer electrolyte fuel cell water management visualization current distribution combined observation flooding water droplet distribution vapor pressure distribution

项目摘要

From 2006 to 2007, combined measurements of visualization of water droplets and current distribution measurement were carried out as well as the comparison with the two dimension cell model.1 Novel single PEFC cell was designed modifying the optical cell previously designed for visualization, where 16 pieces of fine current collectors were embedded in the webs of acrylic resin flow field. This structure is superior to the conventional cell structure for current distribution measurement in the points of direct collection of current from the GDL instead of carbon separator.2. Current distribution was measured changing humidifier temperature, oxygen utilization ratio and CO concentration. Measurement of current distribution under CO poisoning was able to show the significant change of current distribution in the cathode plane. Current at the cathode inlet was decreased with the increase of CO concentration while current at the cathode outlet was increased significantly. This is understood considering that CO poisoning was significant at anode outlet and that counter flow configuration was adopted in this experiment. These findings are consistent with the results obtained from visualization measurement of water droplet. This shows the importance of combined measurement in the sense that one experiment is complementary to the other measurement.3. Two dimension cell model has been developed in our laboratory and the calculated results were compared to those of current distribution measurements. The comparison gives fairly good agreement and it shows cell model is useful for the understanding of the change of current distribution under the various operating conditions.

从2006年到2007年，进行了水滴可视化和电流分布测量的组合测量，以及与二维电池模型的比较。1设计了新型的单PEFC电池，修改了先前设计用于可视化的光学电池，其中16片精细集流体嵌入丙烯酸树脂流场的网状物中。这种结构上级传统的电池结构，用于电流分布的测量，在点直接收集电流从GDL而不是碳分离器.通过改变湿化器温度、氧气利用率和CO浓度，测量电流分布。在CO中毒条件下测量阴极面电流分布，发现阴极面电流分布发生了显著变化。阴极入口电流随着CO浓度的增加而减小，而阴极出口电流则显著增加。考虑到CO中毒在阳极出口处是显著的并且在该实验中采用逆流配置，这是可以理解的。这些发现与水滴可视化测量结果一致。这表明了联合测量的重要性，因为一个实验是对另一个测量的补充。3.在实验室建立了二维电池模型，并将计算结果与电流分布测量结果进行了比较。结果表明，电池模型对了解不同工作条件下电流分布的变化是有用的。