摘要
为解决枚举法得出的定速循环水泵最优运行方式的局限性,通过分析汽轮机低压缸、冷却塔及凝汽器真空的全工况计算模型,提出了在环境温度相等的前提下进行循环水泵全工况运行优化,并对其流程进行了阐述,将排汽压力对汽轮机功率的修正曲线进行了全工况拟合,利用二分法求解机组各工况下循环水泵相邻运行方式的等效益点,进而获得等效益曲线,并采用二分法对某电厂的定速循环水泵进行了等效益曲线实例验证.结果表明:循环水泵优化运行后,平均可降低煤耗0.594 g/(kw.h).
In order to overcome the limitation of optimized operation of constant-speed circulating water pumps obtained by enumeration method, the idea of optimizing the operation of circulating water pumps under full conditions was proposed on the premise of equal inlet temperature of cooling water, based on a- nalysis of full-condition calculation models for low-pressure cylinder, cooling tower and condenser vacuum. The specific optimization process is to fit the corrective curve between turbine power and exhaust pressure under full conditions, then to solve the equal efficiency points between adjacent operating modes of circu- lating water pumps by dichotomy method, and finally to acquire the equal efficiency curves. Verification results on the equal efficiency curves in a certain power plant show that an average of 0. 594 g/（kw .h） net coal consumption can be saved after the optimization of relevant circulating water pumps.
出处
《动力工程学报》
CAS
CSCD
北大核心
2011年第9期682-688,共7页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金(51036002)资助项目
关键词
火电机组
定速循环水泵
运行优化
凝汽器真空
等效益曲线
二分法
thermal power unit
constant-speed circulating water pump
operation optimization
condenser vacuum
equal efficiency curve
dichotomy method
