固体氧化物燃料电池系统的模拟及优化

Simulation and Optimization of Solid Oxide Fuel Cell System

以第三代燃料电池——固体氧化物燃料电池为研究对象,基于德国西门子新型固体氧化物燃料电池技术,选用内外燃料重整相互结合的设计方式,对第三代固体氧化物燃料电池系统进行研究。将系统输入火用效率、能量利用率、燃料利用率及燃料电池的进出口温度作为评价指标,对设计工况为5 kW电效率的系统做出深入分析与进一步优化。与最初5 kW工况对比,系统净效率增加26%,火用效率增加23%,输出功率增加2.5 kW,整体能量利用率提高约25%。

Taking the third-generation fuel cell-solid oxide fuel cell(SOFC)as the research object,this paper made research on the third-generation SOFC system based on new SOFC technology developed by German Siemens by choosing the design method that combined internal and external fuel reforming,and made in-depth analysis and further optimization of the system when the design working condition is 5 kW electrical efficiency by using system input exergy efficiency,energy utilization rate,fuel utilization rate,and fuel cell inlet and outlet temperature as evaluation indicators.Compared with the original 5 kW working condition,the net efficiency of the system has increased by 26%,the exergy efficiency has increased by 23%,the output power has increased by 2.5 kW,and the overall energy utilization rate has increased by about 25%.