电动给水泵焓升对动力循环经济性的影响

Termal Economic Performance Analyses of Steam Power Cycles for the Influence of Feedwater Enthalpy Rise in Motordrive Pumps

本文从蒸汽动力循环的角度讨论了电动给水泵中水的焓升对循环经济性的影响．根据对泵焓升及其来源的不同的理解，提出了形式不同但本质和计算结果完全一致的经济性指标计算方法。将上述分析结果用于电厂实际循环，给出了电动方式下考虑给水焓升时，机组动力循环的经济性及其它相关参数的计算模型；文中进行了大量的验算工作，充分证明了计算模型的正确性。此外，文中还提出了一些新概念和处理方法．

In this peper,it is discussed that the thermal economic performance of steam power cyeare a ffected by the variation of feedwater enthalpy rise. Based different understand about reason for feedwater enthalpy rise,different calculating models are put forword.Although their forms aren’tsame,but their calculated reeults are identical,It is declared that the physical essence is common。Then,according to the same principles,thermal economic performance of the real turbine systems canbe analyses too,and its calculating models are similar to the cycles calculating models ,Lastly ,all themodels are checked through energy balance of thermal System fully,Moreover some new concepts areadvanced.