The equivalent enthalpy drop method and thermal system state equations were used to construct the mathematics model of steam extraction pressure lose of heater for thermo-economy.

• 应用等效焓降方法和热力系统状态方程,采用严格的数学推导,构建了抽汽压损对热经济性影响的数学模型,该模型具有通用性强,适于程序化的特点。