引射式加热器应用于200MW机组低压回热系统热经济性分析  

Thermo-economic Analysis of LP Heater Replaced with Ejector Heater for 200MW Units

作　　者：冉景煜[1] 温宇馨[1] 

机构地区：[1]重庆大学动力工程学院

出　　处：《电站系统工程》2010年第5期39-42,共4页Power System Engineering

摘　　要：200 MW火电机组低压回热系统存在较大的火用损失,严重降低机组的热经济性和效率。应用等效焓降法,深入分析采用引射式加热器应用于机组低压回热系统时,机组热经济性变化的因素。在此基础上,对N200-130/535/535型机组低压回热系统的四级面式低压加热器进行局部替代,以比较分析各种替代方式对机组热经济性变化的影响情况。计算结果表明:替代全部四级面式低压加热器是最优化的替代方式,可使系统的热经济性提高0.296%。There is much heat loss in low-pressure feedwater heater system of thermal unit.The thermo-economic characters and its effected factors are analyzed with the equivalent enthalpy drop method while the low pressure heaters are replaced with the ejector heater.On this basis,for the low pressure heaters replaced with the ejector heaters in different way for the N200-130/535/535 units,the thermo-economic change is analyzed.The results show that the thermo-economic effect is the best for replacing all the surface heaters in low pressure system,and its efficiency can be increased 0.296%.

关 键 词：引射式加热器 低压回热系统 面式加热器 等效焓降 热经济性 

分 类 号：TK284.1[动力工程及工程热物理—动力机械及工程]