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文章对湿冷机组给水泵汽轮机排汽至主机凝汽器与自带凝汽器的两种方案进行分析,在文中给定的边界条件下,自带凝汽器方案比排汽至主机凝汽器方案每台机组初投资增加320万元、机组平均热耗降低2.1kJ/kWh,增加的初投资在电厂20年经济寿命内无法回收,排汽至主机凝汽器方案经济性优于自带凝汽器方案。敏感性分析的结果为当自带凝汽器方案较排汽至主机凝汽器方案平均热耗降低值大于2.79kJ/kWh时,自带凝汽器方案经济性优于排汽至主机凝汽器方案。
In this paper, the two schemes of steam turbine exhaust to main condenser and self-contained condenser are analyzed. Under the given boundary conditions, the self-contained condenser scheme is better than the exhaust condenser to the main condenser The initial investment of each unit will increase by 3.2 million yuan and the unit average heat consumption will be reduced by 2.1 kJ / kWh. The increased initial investment can not be recovered within 20 years of economic life of the plant, and the economy of the exhaust to main condenser is better than that of self- Steam program. The result of sensitivity analysis is that when the average heat consumption reduction of the self-contained condenser scheme to the main condenser is greater than 2.79kJ / kWh, the self-contained condenser scheme is more economical than the exhaust gas to the host condenser Program.