Pollutant emission analysis of underground garages based on driving state

The emissions of pollutants from fuel vehicles are closely related to the driving state, so it is necessary to calculate the emissions according to the specific driving characteristics in underground garages. By decomposing the driving state of vehicles in underground garages, the MOVES model is used to simulate the emissions of CO, PM2.5 and PM10 in underground garages for residential and commercial areas. The results show that the pollutants in the garage mainly come from the starting emissions of vehicles in the parking spaces, and the operating emissions in the driveway account for a small proportion (only 0.3% to 2.6%). The emissions of pollutants in winter are larger than those in summer, and the difference in CO emission is almost double, and the difference in PM2.5 and PM10 is two times. The dilution method is used to calculate the air change rate (ACR) corresponding to the control of CO concentration. ACRs of the underground garage are 2.6 h-1(summer) and 5.5 h-1(winter) in residential areas, 4.3 h-1(summer) and 8.8 h-1(winter) in commercial areas. Although CO emission is much greater than that of PM2.5 and PM10, and both medium efficiency and rough filters are installed for the outdoor air, it is difficult to eliminate particulate matter according to the ventilation volume calculated to control CO concentration.