摘要
在火力发电厂实际运行中,必须经常向热力系统补充化学水。常见的补水方式有2种:化学水通过凝汽器进入系统;化学水从除氧器进入系统。文中以国产某N25-35的热力系统为例,通过等效焓降法分析2种不同的补水方式对电厂热经济性的影响。理论计算结果表明:补水从凝汽器进入热力系统比从除氧器进入系统具有更好的节能效益,其热效率提高了0.16223%,煤耗下降了0.796g/kWh,1年可节省标准煤149.25t。
In the actual operation of thermal power plant, the chemical water must be added to the thermodynamic system.There are two common ways of water supply: first, the chemical water enters the system through the condenser; secondly, the chemical water enters the system from the deaerator.In this paper, the effect of two different ways of water supply on the thermal economy of the power plant was analyzed by using the equivalent enthalpy drop method,which is an example of a N25-35 thermal power system.The theoretical calculation results show that the energy efficiency of water from the condenser into the thermal system is better than that from the deaerator into the system, its thermal efficiency was increased by 0.16223%, coal consumption fell by 0.796g/kW·h,a year can save standard coal 149. 25 t. The conclusion of this paper has certain guiding significance for the design of power plant thermodynamic system.
出处
《节能》
2017年第6期47-50,共4页
Energy Conservation
关键词
热力系统
等效焓降法
抽汽等效焓
热经济性
节能
Thermal system
The equivalent enthalpy drop method
Extraction equivalent enthalpy
Thermal economy
Energy saving
