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首页> 外文期刊>International Journal of Electrochemical Science >Effects of Gas Channel Design on Water Management and on the Performance of Polymer Electrolyte Membrane Fuel Cells: A Review
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Effects of Gas Channel Design on Water Management and on the Performance of Polymer Electrolyte Membrane Fuel Cells: A Review

机译：气体通道设计对水管理和聚合物电解质膜燃料电池性能的影响：综述

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Recently, polymer electrolyte membrane fuel cells (PEMFCs) have been studied by scientistsworldwide as tools that can replace traditional energy sources to address issues related to energydepletion and environmental pollution. PEMFCs present many advantages for various applications,such as their high efficiency, ability to self-start at low temperatures and clean emissions. However,PEMFCs have not yet been widely used in applications due to their high manufacturing costs and lowlevels of power density. Flow-field design optimization serves as a good means to enhance fuel celloperations; as a result, many studies have focused on optimizing the flow field to improve watermanagement and fuel cell performance output. The paper provides a review of a variety of studiesconducted on flow-field configuration design that contribute greatly to water management and fuel celloperation. Regarding pin-type flow fields, the design uses several pins of various shapes arranged in arectangular or spherical configuration. The membrane can become dry as a result of over waterdischarge. Meanwhile, for straight and parallel configurations, such designs include many separateparallel flow channels that connect the inlet to the outlet. These designs are simple and require thelowest level of pressure drop by equally distributing gases into parallel paths. Some works havedesigned bipolar plate configurations that include multi-pass serpentine flow fields, which enhanceunder-rib convection, generate a more uniform gas distribution, and quickly remove water from underrib regions. A geometrical characterization shows that multi-pass serpentine flow fields strengthenunder-rib convection intensities and support more uniform conditions in terms of gas concentrations,temperatures, and pressure levels in comparison to conventional serpentine flow fields.
机译：最近，全世界的科学家们已经研究了高分子电解质膜燃料电池（PEMFC）作为可替代传统能源来解决与能源消耗和环境污染有关的问题的工具。 PEMFC在各种应用中均具有许多优势，例如它们的高效率，在低温下自启动的能力和清洁的排放物。然而，由于其高制造成本和低功率密度，PEMFC尚未被广泛用于应用中。流场设计优化是增强燃料电池运行的好方法;结果，许多研究集中在优化流场以改善水管理和燃料电池性能输出。本文提供了对流场配置设计进行的各种研究的综述，这些研究对水管理和燃料电池的运行做出了巨大贡献。关于销型流场，该设计使用多个以矩形或球形配置的各种形状的销。过度排水会导致膜变干。同时，对于直的和平行的构造，这样的设计包括将入口连接到出口的许多单独的平行流动通道。这些设计很简单，并且通过将气体平均分配到平行路径中，要求最低的压降水平。一些工作设计了双极板配置，其中包括多道蛇形流场，可增强肋下对流，产生更均匀的气体分布并快速去除肋下区域的水。几何特征表明，与传统的蛇形流场相比，多通道蛇形流场增强了肋骨下的对流强度，并在气体浓度，温度和压力水平方面支持了更均匀的条件。

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