300MW亚临界凝汽机组调节级喷嘴优化设计  

Optimization design of governing stage nozzle for 300MW subcritical condensing unit

作　　者：丁立东[1] 邹晓辉 

机构地区：[1]杭州华新机电工程有限公司,浙江杭州310030 [2]华电电力科学研究院,浙江杭州310030

出　　处：《发电与空调》2013年第2期8-11,共4页

摘　　要：国产引进型亚临界300MW等级机组普遍存在调节级喷嘴面积过大导致调节级效率、高压缸效率以及机组的循环热效率显著下降的问题。因此,在保证机组出力能力的前提下,采用新型喷嘴材料、优化喷嘴叶形、采用新型焊接技术及合理设计并适当缩小喷嘴组出口面积,提高汽轮机的相对内效率和机组的循环热效率。Excessive outlet area of the governing stage nozzle is a universal phenomenon for indigenous imported type 300MW subcritical condensing unit, and it leads to a significant decline on governing stage efficiency, high-pressure cylin- der efficiency and cycle thermal efficiency of the steam turbine. On the premise of ensure the unit output capacity, the adop- tion of the new nozzle material and welding technology, the optimization of the nozzle leaf shape, and the reasonable design and proper reduction of the outlet area of the nozzle group can improve the turbine relative internal efficiency and the cycle thermal efficiency of the unit.

关 键 词：调节级喷嘴 调节级效率 高压缸效率 循环热效率 

分 类 号：TM621[电气工程—电力系统及自动化]