【作者】 王静；

【导师】 杜小泽；

【作者基本信息】 华北电力大学（北京） ， 工程热物理， 2007， 硕士

【摘要】 集成板式固体氧化物燃料电池(IP-SOFC)以其自身的优点成为研究者的焦点。本文针对IP-SOFC研究对象,首先对其电化学过程进行理论分析,其次针对阳极建立物理和数学模型,对反应气体在阳极侧的传热传质特征进行基础性的研究,文中采用随温度和燃料浓度变化的电流密度,考虑了电解质/电极界面电化学反应产生的质量和热量源,通过对模型控制方程数值求解得出了温度、速度、以及电流密度的变化规律。最后,本文又针对多孔支撑SOFC单元建立完整的极化模型,对整个电池进行性能分析,找出输出电压的变化规律,并结合文献中实验结果进行了验证,同时分析了燃料入口速度、孔隙率以及开孔率等参数对极化的影响。更多还原

【Abstract】 IP-SOFC has become the focus of researchers for its characteristics. Aiming at IP-SOFC, First, this paper made an academic analysis of electrochemistry. Second, three-dimensional model is established to study the heat and mass transfer phenomena of reactive gas in the anode, current density changing along with the temperature and consistence of fuel is chosen here to calculate the source of mass and heat produced by the electrochemistry in the interface of electrolyte and electrode. The distribution of temperature, velocity and current density was obtained by solving the control equation. Finally, integrated polarization model of the SOFC cell was established, performance of the SOFC cell was analyzed here, the variety law of output voltage was concluded by experiments, and the result was validated by experiment. Simultaneously, effect of fuel entrance velocity, porosity and percent opening was analyzed in this paper.更多还原