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污泥热解气是利用价值较高的生物质能源。以污泥微波热解气为燃料,建立固体氧化物燃料电池(solid oxide fuel cell)-微型燃气轮机(micro gas turbine,m GT)联合发电系统的模型,分析发电系统的性能,研究工作温度、电流密度、燃料利用率等运行参数对系统能效的影响。结果表明,设计工况下以污泥热解气为燃料的SOFC-MGT联合发电系统的发电效率达到55.9%,热电联产(CHP)效率高达74.8%,是高效的生物质能源利用方式。温度和电流密度对SOFC的性能具有较为明显的影响,合理提高工作温度和电流密度有利于提高SOFC的功率密度。研究还表明,燃料利用率增加时,SOFC的发电效率明显提升,整个系统的效率参数变化不明显,应从热解气组成和系统的安全性考虑,选择适当的燃料利用率。
Sludge pyrolysis gas is the use of high-value biomass energy. A model of a solid oxide fuel cell-m GT combined power system was established by using sludge pyrolysis gas as fuel, and the performance of the power generation system was analyzed. The effects of operating temperature, current Density, fuel efficiency and other operating parameters of the system energy efficiency. The results show that the power generation efficiency of SOFC-MGT combined system with sludge pyrolysis gas as fuel can reach 55.9% and CHP efficiency as high as 74.8% under design conditions, which is an efficient way to utilize biomass energy. The temperature and current density have a significant effect on the performance of SOFC. A reasonable increase of operating temperature and current density is beneficial to improve the power density of SOFC. The research also shows that when the fuel utilization rate increases, the power generation efficiency of SOFC increases obviously, and the efficiency parameter of the whole system does not change obviously. From the aspects of pyrolysis gas composition and system safety, choose appropriate fuel utilization rate.