The air cooled condenser(ACC) is composed of modularized air cooled elements.The flow and heat transfer model of an air cooled element used for simulation of ACC island for 135 MW unit has been established.By sing the numerical heat transfer(NHT) software named FLUENT

the numerical study on the performance of air cooled element under different environmental wind speed has been carried out.Through simulation

analysis

and investigation of the velocity field and the temperature field of air flow outside the direct air cooled element

it shows that the air flow rate is 370.0 m3/s

the radiating heat from the air cooled element is 13.80 MW

i.e.in the case of simulated air flow rate being lower than that of designed value by 5.57%

the simulated air flow rate is still higher than that of designed value by 2.76%.