中国电力2018，Vol.51Issue(4)：81-88,8.DOI:10.11930/j.issn.1004-9649.201711159
改进型1000 MW汽轮机变背压热力特性试验研究
Experimental Study on Thermodynamic Characteristics of Optimized 1000 MW Steam Turbines with Variable Back Pressure
摘要
Abstract
The variations of steam turbine operating back pressure will impact not only the thermal performance, but also the operation efficiency of the LP casing greatly because of the change of the exhaust volume flow. Through the back pressure variation test under different loads, the thermodynamic characteristics subject to the back pressure changes are studied for the Dongfang optimized 1000-MW steam turbine, from which the influencing formulas of the back pressure on the output and the heat rate are obtained as well as the relationship curve between the LP casing efficiency and the exhaust volume flow. The operating characteristics of the LP casings are analyzed, and the operation back pressure limits of the turbine are estimated. At last, suggestions are put forward on improving the operation efficiency of the LP casings. The test results and analysis show that the turbine equipped with 1 200-mm last stage blade has higher efficiency and better working characteristics of the LP casings in the back pressure variation, while the economic performance of the unit will be deteriorated due to the deviation between the actual working characteristics and the design expectations of the LP casings.关键词
1000MW机组/汽轮机/背压/低压缸效率/排汽容积流量Key words
1000-MW unit/steam turbine/back pressure/efficiency of LP casing/exhaust volume flow分类
能源科技引用本文复制引用
包劲松,秦攀,楼可炜,朱梅芳,吴瑞康,李俊..改进型1000 MW汽轮机变背压热力特性试验研究[J].中国电力,2018,51(4):81-88,8.基金项目
浙江省基础公益研究计划项目(LGG18F020012).This work is supported by Zhejiang Fundamental Public Welfare Research Funding Project(No.LGG18F020012). （LGG18F020012）
