摘要
发展更高参数超超临界汽轮机组是提高发电热效率和降低燃煤消耗量的主要方向。随着高温合金材料技术的发展,目前已具备发展主蒸汽650℃超超临界机组的条件,主蒸汽和再热蒸汽温度的提高,对回热系统的设计也提出了新的要求。本文设计了超超临界1000 MW汽轮机组的回热系统,分析了主蒸汽和再热蒸汽压力对机组热力性能的影响规律,采用遗传算法优化了各级抽汽参数,汽轮机发电热耗率低于6940 kJ·(kW·h)^-1。
The development of higher-temperature ultra-supercritical steam turbine units is a key approach to improve the thermal efficiencies of coal-fired power plants and reduce the coal consumption.With the development of high-temperature alloy technologies,the live and reheat steam temperatures can be increased to 650℃for ultra-supercritical power units.The regenerative system should be redesigned due to the higher superheat degree with increasing live and reheat steam temperatures.In this work,the regenerative system of a 1000 MW ultra-supercritical steam turbine is designed with the live and reheat steam temperatures of 650℃.The effects of live and reheat steam pressures on the thermodynamic performance of the power unit were analyzed.The extraction steam parameters were also optimized by the GA algorithm.The heat consumption rate of the ultra-supercritical power unit is less than 6940 kJ·(kW·h)^-1.
作者
税杨浩
刘强
张磊
段远源
SHUI Yang-Hao;LIU Qiang;ZHANG Lei;DUAN Yuan-Yuan(College of Mechanical and Transportation Engineering,Beijing Key Laboratory of Process Fluid Filtration and Separation Technology,China University of Petroleum,Beijing 102249,China;Key Laboratory of Thermal Science and Power Engineering of MOE,Beijing Key Laboratory for CO2 Utilization and Reduction Technology,Tsinghua University,Beijing 100084,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第1期89-94,共6页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展计划(No.2015CB251502)
国家自然科学基金(No.51506223,No.51736005)
关键词
超超临界机组
回热系统设计
参数优化
遗传算法
ultra-supercritical power unit
system design
parametric optimization
genetic algorithm(GA)
