Crosswind has adverse effect on performance of large scale indirect air cooling towers. However

for some small size towers

like the ones with height smaller than 30 m used for geothermal and solar power generation

the adverse effect will get more serious. Thus

by using the Fluent software

the variation of air flow field

radiation efficiency and temperature difference inside and outside the small size air cooling tower was simulated

and suggestion that adding windbreak walls inside the air cooling tower was proposed. Moreover

numerical simulation was performed. The results show that

after the windbreak walls were installed

the flow field inside and outside the tower has been significantly improved

which can effectively reduce the crosswind's effect. At crosswind speed of 12 m / s

the radiation efficiency increased with the crosswind velocity.