The exhaust steam discharged from the steam turbine is directly sent to the cooling pipe in the cooling tower through the pipeline. The exhaust steam is cooled into condensate by fan ventilation, and the condenser is not allowed, so it is called direct air cooling. Because the steam is directly sent to the heat sink, rather than the indirect air cooling into the cooling tower, the steam volume is much larger than water, so the steam delivery pipe is especially thick, with the diameter of about three times of indirect air cooling. In addition, the steam transmission pipeline cannot leak steam, otherwise it will directly affect the vacuum of the turbine and reduce the output.
