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首页> 外文会议>ASME fuel cell science, engineering, and technology conference >IMPROVED PASSIVE WATER MANAGEMENT DESIGN FOR USE IN UNITIZED REGENERATIVE FUEL CELLS
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IMPROVED PASSIVE WATER MANAGEMENT DESIGN FOR USE IN UNITIZED REGENERATIVE FUEL CELLS

机译：改进的用于统一再生燃料电池的无源水管理设计

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摘要

Proton Exchange Membrane (PEM) fuel cells require effective water transport away from the cathode to ensure stable operation. Many existing water management strategies involve active methods, reducing system efficiency by introducing parasitic losses. In the present work, we report on the improved design and fabrication of a passive water management scheme involving UV-catalyzed porous polymer wicks. The design features two connected porous domains consisting of a methacrylate-based transport layer and polyvinyl alcohol storage layer. In our previous prototype, large water transport lengths (～12 mm) prevented adequate removal of generated water. The capillary pressure drop across the two porous domains was insufficient to drive a flow rate matched to the rate of generation. Thus, the current design produces a shorter transport distance (～3 mm) by developing a new vertical design. An independently produced SU-8 photolithographic mold is incorporated to improve the fabrication process.
机译：质子交换膜（PEM）燃料电池需要有效地将水从阴极运走，以确保稳定运行。许多现有的水管理策略都涉及主动方法，通过引入寄生损耗来降低系统效率。在目前的工作中，我们报告了涉及紫外线催化的多孔聚合物灯芯的被动水管理方案的改进设计和制造。该设计具有两个相连的多孔区域，分别由基于甲基丙烯酸酯的传输层和聚乙烯醇存储层组成。在我们以前的原型中，较大的水传输长度（约12毫米）阻止了对生成水的充分去除。穿过两个多孔区域的毛细管压降不足以驱动与生成速率匹配的流速。因此，当前的设计通过开发新的垂直设计产生了更短的运输距离（〜3 mm）。装有独立生产的SU-8光刻模具，以改善制造过程。

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