摘要
建立了一个考虑燃烧区的管式固体氧化物燃料电池数学模型。电化学模型中考虑了造成电池输出损失的3种极化现象:欧姆极化、活化极化和浓差极化。在传热模型中,除考虑传导和对流换热外,也考虑了电池和空气进气管之间的辐射换热。分析了燃烧区长度对电池稳态和非稳态性能的影响。计算结果表明,增大燃烧区的长度可以导致电池管温度的增高,并且可以缩短非稳态过程的响应时间。输出端电压和输出功率随燃烧区增大而增大,但其变化幅度很小。
A model was developed to simulate the operation of a tubular solid oxide fuel cell with combustion zone at the steady and transient operation states. The model included all three polarizations： ohmic, activation and concentration polarization. Radiation between cell tube and air feed tube and heat transfer by convection and conduction was also included in this model. The effects of the length of the combustion zone on the performance of the steady and transient operation were analyzed in detail. Numerical results show that increasing the length of the combustion zone leads to an increasing of the overall cell tube temperature and a shorter response time for transient performance. However, enlarging the combustion zone would hardly change the terminal voltage and output power.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第35期120-126,共7页
Proceedings of the CSEE
关键词
管式固体氧化物燃料电池
电化学反应
传热传质
燃烧区
tubular solid oxide fuel cell
electrochemicalreaction
heat and mass transfer
combustion zone
