Influence investigation from the forced draught fan mode on the characteristics of an air-cooled power plant

In view of the critical suction effect of the forced draught fans in the air-cooled steam condenser (ACSC), it is momentous to investigate and optimize the fan mode to acquire a better synthetical performance of the power plant. A verified numerical model of a 2×600MW power plant [1] is specified to discuss the influence from the different rotating speed regulation schemes on the performance of the air-cooled power plant at the design wind angle of β=22.5°. It is found that as a result of the rotating speed regulation of the forced draught fans, the improvement for the performance of the air-cooled power plant arise. It is concluded that the rotating speed regulation for the whole fan array should be proposed because the maximum net power elevation compared to the design case is applicable at all the appointed wind speeds for the fan array case.