摘要
质子交换膜燃料电池(PEMFC)流场是影响其电池性能的重要因素.建立了针对PEMFC流场分析的数学模型,并对5种常见形式的流场进行了模拟计算,考察了其中气体流速及电流密度等物理量的分布情况.模拟结果显示,流场形式对电流密度分布影响很大,适当拉近上游和下游流场之间的距离可以促进电流密度的均匀分布.所建方法可以用来评价流场,对流场形式的设计有指导作用。
Flow field of proton exchange membrane fuel cell （PEMFC） is an important factor which influents cell performance. The influence of five flow fields including serpentine channel, parallel channels, parallel serpentine channels, spiral channels and mesh channels on the gas flow rate and current density distribution of PEMFC was investigated by a mathematical model. The results show that flow fields have great influence on current density distribution. Significant improvements in current density distribution can be obtained by putting inlet channels and outlet channels closer. Different types of flow field can be evaluated by this model which is a useful tool for flow field design.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2007年第11期1313-1318,共6页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金(青年)资助项目(20606025)
关键词
质子交换膜燃料电池
流场
数学模型
proton exchange membrane fuel cell （ PEMFC ）
flow field
mathematical model
