三种流动型式的熔融碳酸盐燃料电池单体性能数值分析  

Numerical Analysis of Single Molten Carbonate Fuel Cell Performance of Three Flow Manifolds

作　　者：缑志斌 许世森 程健 

机构地区：[1]中国华能清洁能源技术研究院有限公司,北京市海淀区100098

出　　处：《中国电机工程学报》2011年第29期67-73,共7页Proceedings of the CSEE

基　　金：中国华能集团绿色煤电专项项目(HNKJ06-H01)~~

摘　　要：介绍自行研制的10cm×10cm单体熔融碳酸盐燃料电池(molten carbonate fuel cells,MCFC)的实验研究结果,并以自制单电池稳定放电实验数据为基础,分析拟合出电池电流密度–电压间的线性关系,计算出当前工艺水平电池的单位面积有效阻抗。结合理论分析建立相应的数学模型,利用数值模拟方法预测对比相同结构的1 m×1 m MCFC单电池局部温度、电流密度和氢气浓度等关键参数的分布状况,阴、阳极气流采用叉流、顺流和逆流3种组织型式。模拟计算结果表明:叉流型局部最高温度值最大,容易产生热点,逆流反应最激烈,局部电流密度的跨度范围最大,顺流局部温度与电流密度分布最均匀。The experiment result of a self-developed 10 cm×10 cm single MCFC were presented. Moreover, a linear fitting for the cell current-density and voltage according to experiment data was performed, and the effective resistance per area of MCFC using current level electrode and matrix was obtained. A numerical model was developed based on physical and chemical laws, and it was employed to simulate two-dimensional crucial parameters （e.g., temperature, Hydrogen concentration, and current density） distribution across the 1 mxl m single MCFC with the same active components in three different flow manifolds. The simulation result shows that the local temperature of cross-flow is the highest among the three flow manifolds, located near the intersection of anode gas outlet and cathode gas outlet, so a hot point is produced easily in cross-flow; the counter-flow electrochemical reaction is so intense that the local current density distribution is non-consistent severely; the local temperature and current density distribution of co-flow are both consistent.

关 键 词：熔融碳酸盐燃料电池 数值模拟 流动型式 固定电压法 

分 类 号：TM911[电气工程—电力电子与电力传动]