【摘要】 根据热力系统变工况理论,结合凝汽器传热计算模型,并考虑调节级效率修正、排汽干度变化修正以及余速损失变化修正,建立了双背压机组凝汽器变工况数学模型。并以某600MW双背压机组为例进行了计算,得到了机组功率、循环水温度及流量变化时机组性能的变化规律,为该类机组的经济运行提供参考。更多还原

【Abstract】 Researches on the dual-pressure condenser’s characteristic in changed operating modes is very insufficient.According to the changed operating modes theory,this thesis study the performance of one 600MW unit which has a dual-pressure condenser when the power and the temperature or rate of the circulating water changes,at the same time it combines the calculation model of condenser heat transfer,considers the revises of the regulated-grade efficiency,the dry degree of discharged vapour and the losing speed of the last stage,so it offer great reference for the economical operation of this kind of unit.更多还原