Research on numerical simulation of mechanical ventilation system in underground garages
HAN Hongjing
HAN Tao
LI Cui
WANG Yubo
ZHANG Qian
Abstract：Aiming at the problems of low energy efficiency and uneven air flow organization distribution of the traditional mechanical ventilation system in underground garages,taking a certain underground garage in Jinan City as the research object,the ventilation performance and effect of the underground garage under three ventilation systems,namely natural supply air+mechanical exhaust,mechanical supply air+mechanical exhaust,and ductless induced ventilation,are studied,and the CFD numerical simulation method is adopted.The distribution laws of the CO concentration field,velocity field and temperature field of different ventilation systems at the 1.6 m cross-section of the human breathing height are obtained.The results show that the ductless induced ventilation system optimizes the air flow organization through high-speed jet disturbance,which can reduce the average CO concentration to 21.23 mg/m3.This is significantly better than the traditional duct ventilation system(natural supply air 52.47 mg/m3,mechanical supply air 39.33 mg/m3),and the distribution uniformity is better.The average temperature has dropped to 22.73℃,which can effectively improve the air quality in underground garages.
Keywords：mechanical ventilationCFD simulationinduced ventilation systempollutant concentration
Publication Date：2025-11-30
Online Publishing Date：2025-12-29(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )