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首页> 外文学位 >Gas distribution in PEM fuel cell stacks using individual reactant feed for Unmanned Arial Vehicle (UAV) applications.
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Gas distribution in PEM fuel cell stacks using individual reactant feed for Unmanned Arial Vehicle (UAV) applications.

机译：在PEM燃料电池堆中，使用单独的反应物进料分配气体，用于无人机（UAV）应用。

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摘要

A numerical model was developed to study the feasibility of individual cell fueling and exhausting as a means of providing uniform flow distribution and to offset flooding conditions throughout a Polymer Electrolyte Membrane Fuel Cell (PEMFC) stack. The PEMFC employed a single serpentine flow channel and Membrane Electrode Assembly (MEA) active area of 100 cm 2. The performance of a single cell was evaluated to ensure that power requirements for a medium sized Unmanned Aerial Vehicle (UAV) application could be met with a 6-8 cell scale-up. The single cell maximum power density was reached at 0.719 W cm2. Results concerning mass transport and pressure variations in the serpentine channels are presented. Based on the single cell model, a stack configuration was developed and simulated under the same operational conditions. The performance of the two cell stack was evaluated for uniform flow distribution. The results show improved power density performance although the individual fueling and exhausting technique exhibited limited mass transport. The stack had peak power density of 0.739 W cm 2 (147.8 W). Water flooding conditions within the stack are analyzed and individual valve control for cell purging is suggested as a means of optimization.
机译：开发了一个数值模型来研究单个电池加油和排气的可行性，以提供均匀的流量分布并抵消整个聚合物电解质膜燃料电池（PEMFC）堆中的溢流条件。 PEMFC采用了一条蛇形流动通道和100 cm 2的膜电极组件（MEA）有效面积。评估了一个电池的性能，以确保满足中型无人机（UAV）应用的功率要求6-8单元放大。单电池最大功率密度达到0.719 W cm2。给出了关于蛇形通道中的质量传递和压力变化的结果。基于单电池模型，在相同的操作条件下开发并模拟了堆栈配置。评估两个电池堆的性能以实现均匀的流量分布。结果显示出改进的功率密度性能，尽管单独的加油和排气技术显示出有限的质量传输。电池堆的峰值功率密度为0.739 W cm 2（147.8 W）。分析了烟囱内的水淹状况，并建议采用单独的阀门控制单元进行吹扫作为一种优化手段。

著录项

  • 作者

    Wade, Nasir R.;

  • 作者单位

    Howard University.;

  • 授予单位 Howard University.;
  • 学科 Engineering Mechanical.;Energy.
  • 学位 M.Eng.
  • 年度 2009
  • 页码 115 p.
  • 总页数 115
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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