Taking one 600 MW direct air-cooling unit as example

the influence of environmental wind speed and direction upon the performance of direct air-cooling system has been studied by using the method of numerical simulation.Results of study show that the influence of wind behind the boiler upon the performance of direct air-cooling system was greater than that of wind from other direction;under certain exhaust steam parameters

the cooling air flow rate and the heat exchange of air-cooling condenser have reduced as the environmental wind speed has increased.When the wind speed behind the boiler was increased to 10 m/s

the wind speed on the windward area decreased from 2.1 m/s at without wind condition to 1.78 m/s

the heat exchange rate of direct air-cooling condenser was 82.8% of that in without environmental wind condition

the power generation capability of unit has substantially reduced.