1000 MW超超临界二次再热汽轮机缸效率变化对机组热耗影响的定量分析  

Quantitative Analysis of the Effects of Cylinder Efficiency on the Unit Heat Consumption of a 1000 MW Ultra Supercritical Double-reheat Steam Turbine

作　　者：张佳佳 ZHANG Jiajia(Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou 310030,China)

机构地区：[1]华电电力科学研究院有限公司,杭州310030

出　　处：《动力工程学报》2020年第11期884-888,共5页Journal of Chinese Society of Power Engineering

摘　　要：为获得汽轮机各缸效率变化对机组热耗的影响及变化规律,以1 000 MW超超临界二次再热汽轮机为研究对象,采用线性化分析方法进行计算。结果表明:(超)高压缸效率对机组热耗影响较小,中、低压缸效率对机组热耗影响较大;随着机组负荷的降低,各缸效率对机组热耗的影响逐渐增大,但变化幅度较小;缸效率对机组热耗的影响主要通过功率和系统吸热量的变化来实现,其中功率对机组热耗的影响较为显著,尤其是中、低压缸。To obtain the influence law of cylinder efficiency on the unit heat consumption of a 1 000 MW ultra supercritical double-reheat steam turbine, a linear analysis was carried out to perform relevant calculations. Results show that the efficiency of super high-and high-pressure cylinder has little effect on the heat consumption of a unit, while that of medium-and low-pressure cylinder has a great influence. With the decrease of unit load, the influence of efficiency of each cylinder increases, but the amplitude of variation is relatively small. The effect of cylinder efficiency on the heat consumption of a unit is mainly realized through the changes of unit power and system heat absorption, in which, power changes play an important role, especially the efficiency of medium-and low-pressure cylinders.

关 键 词：汽轮机 缸效率 热耗 线性化分析 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程]