从锅炉效率分析看提高小型热电厂参数的意义

The Significance of Enhancing Small sized Thermal Power Station Parameters from the Viewpoint of Boiler Exergy Efficiency Analysis

根据热量的概念推出锅炉效率公式，运用小偏差法原理导出效率与热效率及水蒸气平均吸热温度之间的相对变化率公式，分析了小型热电厂最高参数为次高温次高压的情况，得出提高电厂锅炉参数较提高热效率对增大燃料利用率更为重要的结论。

On the basis of the conception of heat quantity exergy obtained is a boiler exergy efficiency formula and by the use of a small deviation method principle derived is a relative variation rate formula between the exergy efficiency and heat efficiency on one side and steam vapor average heat absorption temperature on the other side. A situation is analysed of the maximum parameters of a small sized power plant being of a sub high temperature and sub high pressure, and a conclusion obtained that, to enhance fuel utilization efficiency, it is more important to enhance the power plant boiler parameters than to raise its thermal efficiency.