塔式太阳能辅助1000MW燃煤发电机组锅炉的热力性能分析  

Thermal Analysis on the Boiler Performance of 1000MW Tower Solar Aided Power Generation Unit

作　　者：庞力平[1] 李瑞华[1] 孙诗梦[1] 杜小泽[1] 杨勇平[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京市昌平区102206

出　　处：《中国电机工程学报》2017年第5期1417-1425,共9页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2015CB251505);河北省应用基础研究计划重点基础研究项目(13964306D)~~

摘　　要：以某1000MW超临界机组为参考,提出一种塔式太阳能辅助燃煤发电的系统,从锅炉屏式过热器后抽出一部分高温蒸汽送入塔式太阳集热器吸热,为平衡抽汽后受热面能量匹配,锅炉加设烟气再循环系统,保证受热面的安全运行。利用电站仿真软件Ebsilon professional进行热力性能模拟,模拟结果表明烟气再循环系统投入运行后能保障该互补发电系统锅炉侧安全,在变工况运行下锅炉效率并未有大幅下降;该太阳能辅助燃煤发电系统最大能有效降低了发电煤耗约7.2g/(k W?h)。A tower solar energy aided coal-fired generation system was proposed by integrating a 1000MW ultra supercritical unit. A part of high temperature steam extracted from after the platen super heater was sent to the tower solar receiver. In order to balance heating surface energy matching and ensure safe operation, a flue gas recirculation system was installed. Simulation software Ebsilon professional for power station was chosen to simulate thermodynamic performance. The results show that the flue gas recirculation system can decrease levelized cost of energy （LCOE） of the hybrid generation system. The boiler efficiency during off-design operation doesn＇t drop significantly. The different loads of the hybrid generation system are analyzed. The maximal coal consumption rate can be reduced about 7.2g/（kW.h） compared with a 1000MW conventional fossil-fuel fired power plant. It is indicated that the hybrid generation system has higher thermal-electric efficiency.

关 键 词：塔式太阳能 辅助燃煤发电 锅炉 热效率 

分 类 号：TK519[动力工程及工程热物理—热能工程]