The main cause limiting output capacity of direct air-cooled unit is the overhigh ambient temperature in summer season.The method of spray humidification and temperature reduction can effectively reduce the inlet air temperature of air-cooled condenser

improving the heat exchange effect

and enhancing vacuum of unit in operation

making the unit to operate under full capability.Through study on and econmic analysis of the spray humidification and temperature reduction method

and adopting numerical simulation software of computed fluid dynamic(CFD)

the effectiveness of said method has been verified

the results show that the additional installation of spray humidification and temperature reduction facility in direct air-cooled system can significantly enhance the economic efficiency and safety of unit in operation.