| 直接液体甲醇燃料电池流场组织行为研究(Ⅰ) 传统对称流道电池的模型建立 |
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| 引用本文： | 尹本浩,何雅玲,李相霖,苗政.直接液体甲醇燃料电池流场组织行为研究(Ⅰ) 传统对称流道电池的模型建立[J].太阳能学报,2008,29(9). |
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| 作者姓名： | 尹本浩 何雅玲 李相霖 苗政 |
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| 作者单位： | 西安交通大学能源与动力工程学院,动力工程多相流国家重点实验室,西安,710049 |
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| 摘 要： | 建立了直接甲醇燃料电池垂直流道方向电池单元的二维稳态数学模型,考虑了电化学动力学、多组分传递和甲醇渗透影响.计算了流道布置密度、扩散层、催化层和质子交换膜等组件尺度对电池内物料传质特性、化学反应组织和电池输出性能的影响.研究发现,增加流道布置密度、增加催化层厚度能有效提高电极反应均匀性和电池性能.其中催化层和质子膜的厚度影响最为显著,在该文研究范围内分别可提高电池的平均电流密度131.0%和17.8%.而扩散层和质子交换膜厚度都存在一个最佳值,需要与以上流场板设计尺寸和膜电极尺寸匹配.
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| 关 键 词： | 直接甲醇燃料电池 传统流道 数值模拟 |
STUDY ON THE CHARACTERISTICS OF FLOWING ORGANIZATION IN DMFC Part Ⅰ:Model Development of Cell with Conventional Symmetrical Plates |
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| Yin Benhao,He Yaling,Li Xianglin,Miao Zheng.STUDY ON THE CHARACTERISTICS OF FLOWING ORGANIZATION IN DMFC Part Ⅰ:Model Development of Cell with Conventional Symmetrical Plates[J].Acta Energiae Solaris Sinica,2008,29(9). |
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| Authors: | Yin Benhao He Yaling Li Xianglin Miao Zheng |
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| Affiliation: | Yin Benhao,He Yaling,Li Xianglin,Miao Zheng (State Key Laboratory of Multiphase Flow in Power Engineering,Xi\'an Jiaotong University,Xi\'an 710049,China) |
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| Abstract: | A two-dimensional,steady-state model of a direct methanol fuel cell(DMFC)with liquid methanol feed was developed.The electrode kinetics,multi-component transport and methanol crossover phenomenon were all considered. The effect of channels disposal density,the influence of backing layer,catalyst layer and polymer electrolyte membrane thickness on mass transfer and cell performance was investigated.The results showed that:with the increase of channels disposal density and the increase of catalyst layer thick... |
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| Keywords: | DMFC conventional flow field numerical simulation |
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