燃煤发电系统设计与敏感性分析  

Design and Sensitivity Analysis of Coal-Fired Power Generation System

作　　者：李杨 LI Yang(China Resources Power Guangdong New Energy Company,Qingyuan,Guangdong 511500,China)

机构地区：[1]华润电力广东新能源公司,广东清远511500

出　　处：《自动化应用》2023年第16期82-85,共4页Automation Application

摘　　要：针对S-CO_(2)发电技术的缺点和难点,本文给出了发电效率较高的S-CO_(2)燃煤发电系统全局模型,设计了系统的各部件,对比分析了再热循环系统和再压缩循环系统的性能,并分析了系统受透平入口参数的影响。经过对比分析,所提模型精度较高,具有较好的效果;与再压缩系统发电效率相比,再热系统发电效率提高了近1.8%,每年标煤节约量可达4 414 t;随着透平入口压力的不断增大与温度的不断上升,再热系统和再压缩系统的发电效率也会提高;对于再压缩循环系统,当透平入口温度上升时,其锅炉换热面积呈逐渐减小的趋势,对于再热循环系统,其锅炉换热面积呈逐渐增大的趋势,且后者锅炉换热面积远大于前者。当透平入口压力增大时,两种系统换热器和锅炉换热面积均呈现逐渐减小的趋势,其中,锅炉换热面积减小幅度不大,换热器换热面积减小比较明显。Aiming at the shortcomings and difficulties of the S-CO_(2) power generation technology,this paper proposes a global model of the S-CO_(2) coal-fired power generation system with high power generation efficiency,and designes various components of the system.A comparative analysis of the performance of the reheat cycle and the recompression cycle systems is conducted,and the impact of the turbine inlet parameters on the system is analyzed.After comparative analysis,it was found that the model has high accuracy and good results after comparative analysis.Compared with the power generation efficiency of the recompression system,the power generation efficiency of the reheat system has increased by nearly 1.8%,and the annual standard coal savings can reach 4414 t.As the inlet pressure and temperature of the turbine continue to increase,the power generation efficiency of the reheat and recompression system increases.For a recompression cycle system,when the turbine inlet temperature increases,the boiler heat exchange area gradually decreases.For a reheat cycle system,the boiler heat exchange area gradually increases,and the latter is much larger than the former.When the turbine inlet pressure increases,the heat exchanger and boiler heat exchange areas of both systems show a gradual decrease trend,with the boiler heat exchange area decreasing slightly,while the heat exchanger heat exchange area decreasing significantly.

关 键 词：S-CO_(2)布雷顿循环 S-CO_(2)发电技术 再热循环 燃煤发电系统 再压缩循环 

分 类 号：TM621[电气工程—电力系统及自动化]