摘要
本文提出了一种新型的太阳能与燃料热化学互补的发电系统,集成了太阳能热化学燃料转化过程与固体氧化物燃料电池(SOFC)单元。200~300℃中低温太阳能驱动甲醇热分解反应,将太阳能转化为富氢燃料(H2、CO)的化学能,产生的太阳能燃料用于驱动SOFC燃料电池进行发电,实现了太阳能及甲醇燃料的高效发电利用。同时,采用微型燃气轮机(MGT)对SOFC余热及未反应燃料进行回收,实现动力余热的高效梯级利用,进一步提升了系统的发电效率及能源利用率。设计工况下,系统发电效率达到58.24%,太阳能净发电效率为41.1%。该研究为太阳能和清洁燃料的高效利用提供了新途径。
A combined solar energy and clean fuel power generation system integrating solar thermochemical and solid oxide fuel cell is proposed.The mid-and-low temperature solar energy at 200~300℃ is upgraded to chemical energy in the form of syngas(H2 and CO) through methanol decomposition.The solar fuel is used to drive fuel cells for power generation,which realizes efficient utilization of solar energy and methanol fuel.Meanwhile,the exhausted gas from SOFC is recycled by micro gas turbine(MGT),so as to achieve high-efficiency cascade utilization of waste heat,and further improve the power generation efficiency and energy utilization efficiency of the system.On the design condition,the net solar energy electricity efficiency and the system electricity efficiency are41.1% and 58.24%.
作者
郑志美
刘泰秀
刘启斌
ZHENG Zhi-Mei;LIU Tai-Xiu;LIU Qi-Bin(Institute of Engineering Thermophysics,Chinese Academy of Science,Bejing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第11期2627-2634,共8页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51722606)。
