热质进出再热机热系统最佳方案的研究

Optimal Solution Research of Heating Value Enters orLeaves Reheat Units' Thermodynamic Systems

在变热量等效热降法理论的基础上,推导出热质进出热力系统的数学描述———纯热量法。它是以机组的新蒸汽能级为基准,将机组各热力设备处工质所据有的能量进行折算,其值为系数ξj。根据ξj的大小判断各热力设备处工质所据有能级的高低;同时,当有热质进出热力系统时,该系数可以准确地判别其进出热力系统的最佳位置,进而减少热质进出热力系统所带来的不可逆损失,使其处于最佳运行状态;为电厂节能改造提供分析方法。

On the basis of Equivalent Heat Drop Theory of changeful heat quantity, a mathematical description that heating value enters or leaves thermodynamic system by absolute magnitude has been deduced. This method is called the pure heat quality method. It regards new steam of units as benchmark, and converts heat of units other where. The consequential coefficient 'ξj' is called pure heat quantity grade coefficient. According to the value of 'ξj', not only can we judge how heat grade of the thermodynamic equipment everywhere is high or low, but also judge the optimal place where heating value enters or leaves, when there is heat enters or leaves thermodynamic systems, so decrease irreversible loss and make thermodynamic systems run in optimized state and provide an analysis method for economizing energy and altering power station.