基于固体氧化物燃料电池的有机工质余热发电联合系统特性的理论研究  

Theoretical Study on a Waste Heat Power Generation System Driven by SOFC Based on Organic Working Medium

作　　者：阎哲泉[1] 王漫[1] 王江峰[1] 马少林[2] 戴义平[1] 

机构地区：[1]西安交通大学叶轮机械研究所,西安710049 [2]东方汽轮机有限公司,德阳618000

出　　处：《动力工程学报》2013年第7期560-566,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学青年基金资助项目(51106117);国家科技支撑计划重点资助项目(2011BAA05B03);陕西省自然科学基金资助项目(2011JQ7002)

摘　　要：针对有机朗肯循环对低温余热回收的显著优势,提出了一种基于固体氧化物燃料电池(SOFC)的有机工质余热发电联合系统.该系统包含内重整SOFC、后燃室、燃气轮机、压气机、预热器和有机朗肯循环,实现了能量的梯级利用,有效地提高了系统的总发电效率.在稳态数学模型的基础上,建立了基于SOFC的有机工质余热发电联合系统的热力仿真分析平台,研究了关键参数对系统性能的影响.结果表明:在设计工况下,系统的总发电效率可达65%以上;随着燃料摩尔流量的增加,系统的净输出功增加,但系统的总发电效率有所下降;在一定范围内,增大压气机压比可以提高系统净输出功和总发电效率;随着蒸汽与碳物质的量比的增大,系统的净输出功减小,总发电效率下降.To make use of the advantage of organic Rankine cycle for low temperature waste heat recovery, a waste heat power generation system driven by solid oxide fuel cell （SOFC） was proposed based on organic working medium, including an internal reforming SOFC, an after-burner, a gas turbine, compressors, pre heaters and ORC, which can help to realize gradient utilization of energy, and improve total power generation efficiency of the system. Based on a steady-state mathematical model, an analysis platform was established for thermodynamic simulation of the system, so as to study the effects of key parameters on the system performance. Results show that the total power generation efficiency of the system may reach 65% under design conditions; with the rise of fuel flow, the net power output increases, however, the total power generation efficiency decreases; within a certain range, the increase of compressor pressure ratio is beneficial to improvement of both the net power output and total power generation efficiency; with the increase of steam/carbon molar ratio, both the net power output and the overall power generation efficiency decrease.

关 键 词：有机朗肯循环 固体氧化物燃料电池 余热发电 联合循环 

分 类 号：TK115[动力工程及工程热物理—热能工程]