F级联合循环汽轮机冷态启动优化研究  

Study on Cold Start-Up Optimization of F-Class Combined Cycle Turbine

作　　者：郝震震 冯磊 HAO Zhenzhen;FENG Lei(Shanghai Electric Power Generation Equipment Co.,Ltd.Turbine Plant,Shanghai 200240,China)

机构地区：[1]上海电气电站设备有限公司汽轮机厂,上海200240

出　　处：《热力透平》2024年第3期161-164,221,共5页Thermal Turbine

摘　　要：描述了联合循环中低压合缸机组汽轮机的冷态启动过程,通过有限元方法模拟了中低压转子在暖机过程中的温度场分布,系统研究了金属凝结换热对转子轴心升温速率的影响。研究发现,提高汽轮机背压可以显著缩短低速暖机时间,背压越高,暖机速度越快。进一步提出了提高轴封供汽阶段的机组背压,利用轴封汽辅助暖机的设想。研究成果可为中低压合缸结构联合循环汽轮机的冷态启动过程优化提供参考。The cold start-up process of combined cycle steam turbine with IP-LP combined casing is described,and the temperature field of IP-LP rotor is simulated using finite element method.The influence of condensation heat transfer on heating rate of shaft centerline is investigated.The simulation results show that the warm-up time can be reduced remarkably by raising the back-pressure of turbine,in other words,the higher the back-pressure is,the less the warm-up time will be.Furthermore,it is proposed that the unit can be warmed up utilizing the shaft seal steam after raising the back-pressure.The research results can provide reference for cold start-up optimization of combined cycle turbines with IP-LP combined casing.

关 键 词：联合循环 汽轮机 中低压转子 轴封汽 背压 暖机时间 凝结换热 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]