火电机组热力循环系统通用计算模型的研究

Study on Calculation Models, Generally Applicable for Thermal Cycles of Fossil Fired Power Sets

以常规热平衡方法为基础,根据等效热降的基本理论和单位蒸汽做功与汽水流量系数通用表达式,推导出了火电机组热力循环系统既能用于其热经济性计算,又能用于汽水流量分布计算的通用计算模型。实例表明,应用火电机组热力系统的通用计算模型所得结果与常规热平衡法完全相同。

Based on the conventional heat balancing method, by making use of the basic theory of equivalent heat drop and in terms of an expression of specific work done by fresh steam and flow coefficient of steam and water, a mathematical model is derived for thermal cycles of fossil fired power plants, both generally applicable for calculating the thermal efficiency as for distribution calculation of steam and water. A practical example shows that results obtained with this generally applicable mathematical modal for heat cycles of fossil fired power plants are the same as those obtained with the conventional method of heat balancing.