摘要
利用数值计算的方法对超临界600 MW机组低压缸排汽通道进行研究,分析由于其结构原因导致的低压缸排汽通道压损过大、静压恢复能力丧失、内部流场混乱等问题。结合实际情况,确定排汽导流环为重点改造对象,并对其进行数值研究,确定了排汽导流环的最优结构为直线圆弧型。机组经过改造后上述问题得以解决,热力试验数据显示,机组热耗率降低约8.7 k J/k Wh,节能效果明显,经济效益可观。
In this paper,exhaust passage of low pressure cylinder for super-critical 600 MW unit is studied by using the method of numerical calculation. Its structure problems lead to too much pressure loss,static pressure recovery ability and internal flow field confusion. Combining with the actual situation,the exhaust steam guide ring is determined to be the transformation objects. The optimal structure of exhaust steam flow guide ring is choosed as key reform target and numerical research is carried on. The results show that unit heat rate reduces by 8. 7 k J / k Wh with obvious effect of energy-saving and the economic efficiency is considerable.
作者
董标
李明志
DONG Biao LI Mingzhi(Zhejiang Datang Wushashan Power Generation Co., Ltd., Ningbo, Zhejiang 315722, China)
出处
《东北电力技术》
2017年第2期41-43,共3页
Northeast Electric Power Technology
关键词
低压缸
排汽通道
排汽导流环
气动性能
数值分析
low pressure cylinder
exhaust passage
exhaust guide ring
aerodynamic performance
numerical analysis
