二次再热超临界机组热力系统热经济性计算模型的研究

A Study of Heat Economy Calculating Model for Thermal System in Supercritical Pressure Power Unit with Second Reheat Cycles

以常规热平衡方法和等效热降的基本理论为基础,经过严格的数学推导,建立了既能用于其单位新蒸汽作功又能用于循环吸热量计算的二次再热超临界机组热力系统通用计算模型,实例计算结果与常规法完全一致,为此类机组热经济性与局部因素的快速准确定量计算奠定了基础,并可应用于其它任何凝汽式火电机组热力系统。

In this paper the authors developed the heat economy calculating model of thermal system in supercritical pressure power unit with second reheat cycles by mathematical derivation strictly, used for calculation of both unit new steam making power and circulation heat, based on the normal energy balance method and basic theory of equivalent heat drop . The calculation resuh of a actual thermal system by those method is identical completely. Foundation for the quick accurate deciding quantity calculation of unit heat economy and local parameters is established. This calculating model can be applied to any other thermal system of condensing steam turbine.