...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of power sources >Modeling Of Two-phase Transport In The Diffusion Media Of Polymer Electrolyte Fuel Cells
【24h】

Modeling Of Two-phase Transport In The Diffusion Media Of Polymer Electrolyte Fuel Cells

机译：聚合物电解质燃料电池扩散介质中两相输运的建模

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A three-dimensional model of polymer electrolyte fuel cells (PEFCs) is developed to investigate multiphase flows, species transport, and electrochemical processes in fuel cells and their interactions. This two-phase model consists of conservation principles of mass, momentum, species concentration and charges, and elucidates the key physicochemical mechanisms in the constituent components of PEFCs that govern cell performance. Efforts are made to formulate two-phase transport in the anode diffusion media and its coupling with cathode flooding as well as the interaction between single- and two-phase flows. Numerical simulations are carried out to investigate multiphase flow, electrochemical activity, and transport phenomena and the intrinsic couplings of these processes inside a fuel cell at low humidity. The results indicate that multiphase flows may exist in both anode and cathode diffusion media at low-humidity operation, and two-phase flow emerges near the outlet for co-flow configuration while is present in the middle of the fuel cell for counter-flow one. The validated numerical tools can be applied to investigate vital issues related to anode performance and degradation arising from flooding for PEFCs.
机译：建立了聚合物电解质燃料电池（PEFC）的三维模型，以研究燃料电池中的多相流，物质传输和电化学过程及其相互作用。此两阶段模型由质量，动量，物种浓度和电荷的守恒原理组成，并阐明了控制细胞性能的PEFC组成成分中的关键物理化学机制。努力制定阳极扩散介质中的两相传输及其与阴极溢流的耦合以及单相和两相流之间的相互作用。进行数值模拟以研究低湿度下燃料电池内部的多相流，电化学活性和传输现象以及这些过程的固有耦合。结果表明，在低湿度运行时，阳极和阴极扩散介质中都可能存在多相流，并且在同相流出口附近出现两相流，而在燃料电池的中部则存在两相流以进行逆流。 。经过验证的数值工具可用于调查与阳极性能和PEFC泛滥引起的退化有关的重要问题。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号