摘要
为研究流场结构设计对电池内的流动、组分传递和电池性能等的影响,建立了一个稳态的三维非等温质子交换膜燃料电池数学模型,应用此模型对一个交指状流场设计的电池单体(电极面积为6.4 cm×6.5 cm)进行了数值研究.数值计算得到了电池的温度、组分质量浓度和局部电流密度等的空间分布,分析了不同电池反应物湿度等对电池特性的影响.结果表明,受传质的影响,沟道下方阴极催化层的温度大于相应沟脊下方的区域;与饱和气流进气的基本工况相比,降低阴极的进气湿度能提高电池的性能,而降低阳极的进气湿度则会导致电池性能的下降.
In order to investigate the effects of the flow field structure design on the flow characteristics, species transport and cell performance, a steady-state three-dimensional non-isothermal mathematical mod- el based on computation fluid dynamics was presented. The developed mathematical model was employed to numerically study a single proton exchange membrane fuel cell with interdigitated flow fields （with the electrode area of 6.4 cm ×6.5 cm）, and the spatial distributions of temperature, species concentration and local current density were obtained. Furthermore, the effect of different reactant humidity on the cell performance was discussed. The results indicate that the temperature in the cathode catalyst layer under the channel is higher than that under the shoulder; compared with the case of saturated inlet reactants, the decrease of cathode gas relative humidity will enhance the cell performance, while the decrease of anode gas relative humidity will reduce the cell performance.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2009年第6期1147-1151,共5页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(50806068
50706045)
教育部科学技术研究重点资助项目(207043)
浙江省自然科学基金资助项目(Y106161)
能源清洁利用国家重点实验室开放课题资助项目(ZJUCEU2008001)
关键词
质子交换
膜燃料电池
交指状流场
两相流
组分传递
proton exchange
membrane fuel cell
interdigitated flow field
two-phase flow
species transport
