燃料重整固体氧化物燃料电池发电系统性能分析及多变量参数优化

以燃料重整的固体氧化物燃料电池发电系统为研究对象，通过数值模拟方法对固体氧化物燃料电池发电系统的性能、(火用)损、(火用)效率以及多变量运行参数优化进行了分析。研究结果表明：重整反应中燃料利用系数、电池工作温度、水碳比、电堆电流密度等参数对系统性能影响显著；电堆工作在不同电流密度下都有其对应的最佳工作温度、最佳燃料利用系数工况点；水碳比会改变重整反应产氢量，从而影响电化学反应速率，空气加热器的(火用)损所占份额最大；优化后的系统效率及(火用)效率为0.480 9和0.462 6,效率提升约4%。

Performance Analysis and Multivariate Parameter Optimization for Fuel Reforming Solid Oxide Fuel Cell System

Taking the fuel reforming solid oxide fuel cell (SOFC) system as the research object, the performance of the system, exergy loss, exergy efficiency and multivariate operating parameter optimisation were simulated and analyzed by the numerical simulation method. The research results show that the fuel utilization factor, cell operating temperature, water to carbon ratio and electric stack current density in the reforming reaction have a significant impact on the performance of the system; there are optimum operating temperatures and fuel utilization factor operating points for electric stack at different current densities; the water to carbon ratio can change the amount of hydrogen produced by the reforming reaction and thus the electrochemical reaction rate. The air heater accounts for the largest share of the exergy loss; the optimized system efficiency and exergy efficiency are 0.480 9 and 0.462 6 with an improved efficiency of 4%.