Patent ID: 8320750

Claim:
A method for improving cooling capacity of a power station direct air-cooling system, which includes the following steps: a) connecting a transformer in a cooling system to a first voltage of a power grid and outputting a second voltage to an electric motor, so that a working voltage of the electric motor reaches 380-390 V; b) outputting a frequency of 40-47 Hz from a frequency converter in the cooling system to the electric motor; c) driving a fan by the electric motor working under the working voltage of 380-390V and the frequency of 40-47 Hz to rotate according to a set velocity ratio with an aid of a speed reducer, and d) delivering cooling wind by the rotating fan head-on to a heat radiator; wherein the set velocity ratio of the speed reducer is a rotation rate of the electric motor at the frequency of 40-47 Hz divided by 110-130% of a rating rotation rate of the fan.