CFD simulation and optimization of ventilation and heat dissipation for cooling towers in underground space of a project

In this paper, the ventilation and heat dissipation for cooling towers of the existing layout scheme and after taking optimization measures in underground space of a built project are simulated using CFD. The results show that the occlusion of structural beams, steel beams and grates in the existing layout scheme has a great impact on the ventilation of the cooling towers. The return mixing rate of the cooling towers is 41.45%, which is much higher than the requirement of 10.00% return mixing rate in normal operation. After taking the combined optimization measures of removing the steel beams and grates, and installing air deflectors and special-shaped air deflectors, the return mixing rate of underground space equipment is close to zero. The measured average return mixing rate of the cooling towers is 3.83%, which well verifies the CFD simulation. After optimization, the underground space equipment operates well and achieves the expected engineering requirements.