Liquid Water Transport in Porous Electrodes

摘要建议编号：9803364建议类型：调查员发起首席调查员：Trung V.Nguyen隶属关系：堪萨斯大学这项拨款是通过化学和运输系统司界面、运输和分离计划的分离和净化计划子要素授予的。首席研究员是堪萨斯大学的阮春仲博士。这项研究将试图改善燃料电池的性能。这项技术的基础是通过电极的交叉型流场设计提高水管理的效率。将开发一个模型来描述通过多孔电极的两相流动。该模型将与电压阶跃方案一起用于研究液态水在电极上的分布的影响。研究结果将有助于确定交叉型流场的最佳运行条件和设计参数。质子交换膜(PEM)燃料电池系统以其无污染、理论效率高、设计和操作简单等优点，被广泛应用于电动汽车、便携式电子设备和远程发电等领域。然而，为了使PEM系统具有成本效益，其在实践中的性能和效率需要进一步提高。这项研究将解决提高PEM燃料电池性能的一个重要方面。

Abstract Proposal No: 9803364 Proposal Type: Investigator Initiated Principal Investigator: Trung V. Nguyen Affiliation: University of Kansas This grant is awarded through the Separations and Purification Program sub-element of the Interfacial, Transport and Separations Program of the Chemical and Transport Systems Division. The principal investigator is Dr. Trung Nguyen at the University of Kansas. The research will attempt to improve the performance of fuel cells. The technology is based on increasing the efficiency of water management through an interdigitated flow field design of the electrodes. A model will be developed to describe two-phase flow through a porous electrode. The model will be used along with a voltage stepping scheme to study the effects of liquid water distributions on the electrodes. Results from the work will help determine optimal operating conditions and design parameters for the interdigitated flow field. The proton exchange membrane (PEM) fuel cell system is being seriously considered as a power source for electric vehicles, portable electrical devices and remote power generation because of its non-polluting characteristics, theoretical efficiency, and simplicity in design and operation. For the PEM system to be cost effective however, its performance and efficiency in practice need to be further improved. This research will address a significant aspect of improving the performance of PEM fuel cells.