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根据小扰动理论及热经济性状态方程,对凝汽器系统特性进行了研究,分析了雾化喷洒补水方式对凝汽器真空及火电机组热效率的影响,并通过实例分析了不同补给水方式在不同补给水温度下机组热效率的变化情况.结果表明:一定温度的补给水经过喷嘴雾化处理由凝汽器喉部进入系统时,可以减少系统的冷端损失,降低火电机组的背压,提高系统的热经济性;当补给水温度升高时,ΔP逐渐降低,ΔN缓慢升高.
According to the theory of small perturbation and the equation of state of thermal economy, the characteristics of condenser system are studied. The influence of atomizing spray water replenishment method on condenser vacuum and thermal efficiency of thermal power unit is analyzed. The effects of different water supply modes The results show that when the feed water of a certain temperature enters the system through the nozzle of the condenser through the nozzle atomization, it can reduce the loss of the cold end of the system and reduce the backpressure of the thermal power unit and improve the thermal efficiency of the unit. System thermal economy; when the makeup water temperature increases, ΔP gradually decreases, ΔN slowly increases.