700 ℃超超临界燃煤发电机组热力系统设计及分析  

Design and Exergy Analysis on Thermodynamic System of a 700 ℃ Ultra Supercritical Coal-fired Power Generating Set

作　　者：蔡小燕[1] 张燕平[1] 李钰[1] 黄树红[1] 高伟[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074

出　　处：《动力工程学报》2012年第12期971-978,共8页Journal of Chinese Society of Power Engineering

基　　金：国家重点基础研究发展计划资助项目(973项目)(2009CB219803);国家自然科学基金资助项目(创新研究群体科学基金)(51021065)

摘　　要：根据MC(Master Cycle)系统的框架结构,设计了基于MC的1 000MW、700℃超超临界燃煤发电机组热力系统,确定了相关的热力参数,同时设计了基于常规热力系统结构的对比系统.将这2个热力系统划分为锅炉、汽轮机、发电机、凝汽器和管道共5个单元,采用分析法计算了各单元的损、损系数和效率指标.结果表明:采用MC系统机组的热经济性比常规热力系统机组的热经济性高,主要体现在MC系统机组中汽轮机系统的热经济性较高,尤其是MC系统机组中汽轮机系统的中压缸、第3～6级加热器具有更高的热经济性.According to the frame structure of MC （Master Cycle） system, a thermodynamic system was designed for 1 000 MW, 700℃ ultra supercritical coal fired power generating set based on MC, during which the thermodynamic parameters were determined, while a comparative thermodynamic system de- signed based on conventional structures. Both the thermodynamic systems were divided into 5 units, inclu- ding the boiler, steam turbine, generator, condenser and pipeline, and three indexes of each unit including the exergy loss, exergy loss coefficient and exergy efficiency were calculated by exergy analysis method. Results show that the power generating set based on MC system has higher thermo-economy than that based on conventional system, mainly indicating in the higher thermo-economy of the steam turbine sys- tem, especially in the higher thermo-economy of the IP cylinder and of the heaters at stages 3 to 6.

关 键 词：超超临界机组 燃煤发电机组 热力系统 MC系统 （火用）分析 热经济性 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]