汽动给水泵组性能在线监测  

On-line performance monitoring method for turbine driven boiler feed pump set

作　　者：李勇[1] 李仁杰[2] 曹丽华[1] 张炳文[1] 

机构地区：[1]东北电力大学能源动力工程学院,吉林吉林132012 [2]郑州电力高等专科学校,河南郑州450000

出　　处：《热力发电》2015年第1期82-86,95,共6页Thermal Power Generation

基　　金：吉林省科技发展计划资助项目(20110409);吉林省教育厅"十二五"科学技术研究项目(吉教科合字〔2012〕第93号)

摘　　要：建立机组热力系统和低压缸-低压回热开口热力系统,联立2个热力系统的热平衡方程式消去共有的凝汽器冷源损失,求出给水泵焓升带入给水的能量,进而得到给水泵的轴功率和驱动给水泵汽轮机(小汽轮机)的实际内功率,在线监测给水泵的效率和小汽轮机的相对内效率,从而实现汽动给水泵组性能的在线监测,并将该方法应用于某台660 MW汽轮机组的性能检测。结果表明,该方法与热力学计算方法吻合较好,可实时进行数据采集和处理,在线监测、分析汽动给水泵组的性能变化。The open thermodynamic systems of the whole steam turbine and the low pressure（LP）cylinderLP regenerative heater were established.By building up the simultaneous equations of these two systems,the common cold end loss of the condenser was reduced and the energy that the enthalpy rise of feedwater pump brought to the feedwater was calculated.Thus,the shaft power of the feedwater pump and the actual inner power of the auxiliary turbine can be obtained.So the pump efficiency and the relative internal efficiency of the small turbine can be online monitored.Application of this method on a 660 MW unit shows that,this method had the capability of real time collecting data and monitoring performance changes of the turbine driven feed pump set.

关 键 词：汽动给水泵 性能 在线监测 小汽轮机 相对内效率 

分 类 号：TK212[动力工程及工程热物理—动力机械及工程]