Biased AC electroosmosis micropump for water management in PEM fuel cells
Biased AC electroosmosis micropump for water management in PEM fuel cells
复制标题
用于 PEM 燃料电池中水管理的偏置交流电渗微型泵
DOI：
10.1109/mwscas.2008.4616892
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Jiehong Wu
中科院分区：
文献类型：
--
作者：
N. Islam;Jiehong Wu
质子交换膜（PEM）燃料电池是最有前途的燃料电池技术之一。最近对PEM燃料电池的实验和数值研究表明，水管理是设计坚固、高性能PEM燃料电池的最关键问题之一。因此，电池内适当的水管理是必不可少的，因为膜脱水或阴极淹水会导致电阻损失增加。减少燃料电池的溢流通常是通过用过高的反应物（H2或O2）流速和升高的气体压力去除水来完成的。这种混合物使空气输送成为燃料电池上最大的寄生负荷。通常，这种类型的空气输送消耗超过20%的燃料电池功率。作为替代方案，我们开发了一种用于PEM燃料电池应用的新型偏置交流电磁微泵，该微泵可以用微机电系统（MEMS）兼容的半导体微加工制造。本研究将通过实验证明双向泵送作用，通过将水从淹水区域抽走，重新分配到欠饱和区域，可以防止水淹，提高功率密度，保证燃料电池性能稳定。我们还开发了一种集成的互补金属氧化物半导体（CMOS）反馈电路，用于控制微泵。
Proton exchange membrane (PEM) fuel cells are among the most promising fuel cell technologies. Recent experimental and numerical investigations on PEM fuel cells identified water management as one of the most critical issues for designing robust, high-performance PEM fuel cells. Proper water management within the cell is therefore essential, as dehydration of the membrane or flooding of the cathode result in increasing resistive losses. Flooding reduction in the fuel cell is commonly done by removing water with excessive reactant (H2 or O2) flow rates and elevated gas pressures. This mixture makes air delivery the largest parasitic load on fuel cells. Typically, this type of air delivery consumes more than 20% of the fuel cell power. As an alternative, we have developed a novel biased AC electroosmtic micropump for PEM fuel cell applications that can be fabricated with micro-electro-mechanical-systems (MEMS) compatible semiconductor microfabrication. This research paper will experimentally demonstrate the bi-directional pumping action that can prevent flooding, increase power density, and ensure stable performance of fuel cell by removing water from flooded regions and redistributing it to under-saturated regions. We also have developed an integrated complementary metal oxide semiconductor (CMOS) feedback circuit for the control of micropump.