600MW亚临界直接空冷机组电泵改汽泵经济性分析

Economic Analysis on Feed-water Pump Transformation for 600 MW Subcritical Direct Air Cooling Unit

对600 MW亚临界直接空冷机组电泵改汽泵的经济性和改造难点进行了分析,利用等效热降等方法计算了电泵改为汽泵后的经济性和上网电量收益,最后得出600 MW亚临界直接空冷机组配置100%汽动给水泵的可行性和经济性,提出了给水泵小汽轮机的2种冷却方案供不同地区的电厂选择。

In this paper, the economic performance and the difficult points during the feed-water pump transformation from electricity driven to steam driven of 600 MW subcritical direct air cooling unit was analyzed. Through equivalent heat drop method and other methods, economic index and returns from power being accepted by the grid were calculated. The feasibility and economic performance were given for 600 MW subcritical direct air cooling unit with 100% steam feed-water pump,and two kinds of cooling solutions were put forward to provide a choice for power plants in different regions.