结合碳捕集的SOFC-sCO_(2)布雷顿循环集成系统性能分析

Performance Analysis of an Integrated SOFC-sCO_(2) Brayton Cycle SystenCombined With Carbon Capture

固体氧化物燃料电池是将化学能转化成电能的全固态能量转换装置,被认为是极具前景的绿色发电系统。本研究提出了结合碳捕集的固体氧化物燃料电池-超临界二氧化碳布雷顿循环集成系统,通过阳极尾气富氧燃烧实现低能耗碳捕集,并利用s CO_(2)再压缩布雷顿循环回收燃烧室余热提高系统效率。模拟结果显示,该集成系统在设计工况下的净发电效率为59.74%,二氧化碳捕集量为134.50 kg/h。此外,关键工作参数对系统性能的影响分析结果表明,合理的阳极尾气再循环比、燃料利用率和燃料流量是确保系统安全高效运行的必要前提。

Solid oxide fuel cell is an all-solid-state energy conversion device that converts chemical energy into electrical energy,and is considered a promising green power generation system.In this study,an integrated system of solid oxide fuel cell and supercritical CO_(2) Brayton cycle with carbon capture is proposed,which achieves low energy consumption carbon capture by oxygen-rich combustion of anode exhaust and the waste heat from the combustion chamber is recovered through sCO_(2) recompression Brayton cycle to improve the system efficiency.The simulation results show that the net power generation efficiency of the integrated system is 59.74%and the amount of CO_(2) captured reach 134.50 kg/h.In addition,the analysis of the infuence of key operating parameters on the system performance shows that reasonable anode exhaust recirculation ratio,fuel utilization rate and fuel fow rate are necessary prerequisites to ensure the safe and efficient operation of the system.