空冷机组凝汽器排汽管流场及节能潜力分析

Analysis of flow fields and energy saving potentials for condenser exhaust pipes of air cooling units

采用CFD方法,对某1000MW空冷汽轮机凝汽器排汽管及外接排汽管路的流场进行三维数值模拟计算,分析其通流能力及压力损失系数,并对其结构进行性能优化设计。通过改进设计,耗煤量可以减少0.045%-0.1%,大约节约标煤1 000 t/a以上。

The flow fields within the condenser exhaust pipe and the external exhaust pipe of the 1000 MW air cooling turbo-generator unit were computed with three-dimensional numerical analog by using the CFD method, and the through flow capability of the exhaust pipes as well as the pressure loss coefficient is analyzed. The pipes＇ structure was optimized, and consequently the unit＇s coal consumption is reduced by 0. 045% - 0.1%, saving more than 1 000 tons of standard coal annually.