文章编号：1007−2322（2021）04−0386−06文献标志码：A中图分类号：TM611燃煤 CO2 发电系统两级压缩优化刘广林，徐进良（华北电力大学 能源动力与机械工程学院，北京市昌平区 102206）Optimization of Two-Stage Compression Process forCoal-Fired Carbon Dioxide Power SystemLIU Guanglin，XU Jinliang（School of Energy, Power and Mechanical Engineering, North China Electric Power University,Changping District, Beijing 102206, China） 摘要：相对于燃煤水蒸汽发电机组，高参数燃煤 CO2 发电系统在效率、体积及选材方面都是具有潜在优势的新型发电系统。对燃煤 CO2 发电系统中压缩冷却流程进行优化研究，以压缩机总耗功和系统效率为评价指标，采用 EES 软件模拟分析。首先分析常规燃煤 CO2 发电系统中压缩机部分耗功及压缩机出口温度的变化规律，在此基础上依据能量梯级利用原理，提出优化系统。结果表明：压缩机总耗功随着低压压比增大先减小后增大，即低压压缩机存在最佳低压压比，当主蒸汽参数为 30MPa/600 ℃ 时，最佳低压压比为 1.66，系统效率为 44.1%；低压压缩机出口温度随低压压比增加而增大，而高压压缩机出口温度变化趋势相反；优化压缩冷却流程，得到系统效率提高且随低压压缩机入口温度和压比增大而增加，当低压压缩机入口温度为160 ℃ 时，系统效率为 46.2%，最佳压比为 1.325。关键词：燃煤发电；超临界 CO2；热力学分析；系统优化；压比；布雷顿循环Abstract：In comparison with coal-fired steam generating set,high-parameter coal-fired carbon dioxide power generation sys-tem is such a new type of power generation system, which pos-sesses potential advantages in efficiency, equipment volumeand material selection. The optimization of the compression andcooling process in the coal-fired carbon dioxide power genera-tion system was researched. Taking total power consumptionand system efficiency of the compressor as evaluation indicat-ors, the EES software was adopted to perform the simulationanalysis. Firstly, the power consumption in the compressor andthe change rule of compressor’s outlet temperature of conven...
