| 直接甲醇燃料电池两相非等温模型 |
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| 引用本文： | 苗政,何雅玲,李相霖,邹金强.直接甲醇燃料电池两相非等温模型[J].工程热物理学报,2009,30(12). |
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| 作者姓名： | 苗政 何雅玲 李相霖 邹金强 |
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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,陕西,西安,710049 |
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| 摘 要： | 本文建立了直接甲醇燃料电池的两相、非等温模型.采用多孔介质中的经典多相流动模型来计算电池内与电化学反应相耦合的传质、传热问题;模型中考虑了水的汽化凝结过程和甲醇窜流对电池性能的影响.计算结果表明电池内温度分布不均匀,温度最高点出现在阴极催化层;阳极甲醇浓度分布不均匀是造成阳极催化层内局部反应速率不均匀分布的主要原因,而阴极催化层局部反应速率主要依赖于阴极过电势的分布;大的流场板开口比条件下电池整体均匀性较好,性能得到提高.
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| 关 键 词： | 燃料电池 甲醇窜流 两相 非等温 |
A TWO-PHASE NON-ISOTHERMAL MASS TRANSPORT MODEL FOR DIRECT METHANOL FUEL CELLS |
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| MIAO Zheng,HE Ya-Ling,LI Xiang-Lin,ZOU Jin-Qiang.A TWO-PHASE NON-ISOTHERMAL MASS TRANSPORT MODEL FOR DIRECT METHANOL FUEL CELLS[J].Journal of Engineering Thermophysics,2009,30(12). |
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| Authors: | MIAO Zheng HE Ya-Ling LI Xiang-Lin ZOU Jin-Qiang |
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| Institution: | MIAO Zheng HE Ya-Ling LI Xiang-Lin ZOU Jin-Qiang (State Key Laboratory of Multiphase Flow in Power Engineering,School of Energy & Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
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| Abstract: | A two-phase non-isothermal mass transport model is presented in this paper.The heat and mass transfer across the membrane electrode assembly(MEA),coupled with the electrochemical reactions in the catalyst layers(CLs),are calculated based on the classical two-phase flow model in the porous media.The effect of methanol crossover on the cell performance and the non-equilibrium evaporation/condensation of water are considered in this model.The modeling results show that the distribution of temperature in the ME... |
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| Keywords: | fuel cells methanol crossover two-phase non-isothermal |
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