摘要
通过耦合速度场、温度场、电势场和组分浓度场,建立了以纯氢气为燃料的管式固体氧化物燃料电池(SOFC)数学模型,并对西门子-西屋公司阴极支撑型(AES)管式SOFC进行了轴向二维模拟。模拟结果表明,组分浓度和电流密度的分布与SOFC的运行工况密切相关。在所模拟的电压范围内,欧姆极化起主要作用,提高固体氧化物燃料电池的平均工作温度、改善多孔电极的微观结构、使用纯氧代替空气作为氧化剂可改善电池性能。
A mathermatical model of tubular solid oxide fuel cells （ SOFC）, with developed by coupling the velocity field, the temperature field, the electric potential pure hydrogen as fuel, has been field and the species concentration field with one-another. A Siemens-Westinghouse AES tubular SOFC was then herewith dimensionally simulated. Simulation results indicate that species concentration as well as current density distribution are both closely connected with the mode of operation. Within the voltage range of simulation, ohmic polarization plays the principal role. SOFC＇ s performance can be promoted by raising the fuel cell＇ s mean working temperature, by improving the microstructure of the porous electrode and by substituting pure oxygen for air as the oxidant. Figs 8 and refs 10.
出处
《动力工程》
EI
CSCD
北大核心
2006年第5期742-746,共5页
Power Engineering
关键词
能源工程
固体氧化物燃料电池
性能预测
数值模拟
energy engineering
solid oxide fuel cell
performance prediction
numerical simulation
