Study On Vehicle Emission Characteristics And Emission Reduction In Hefei City

In recent years,city air pollution and vehicle pollution has become it is often seen,major pollution source in many big city air pollution.With the expansion of city scale,the level of economic development of the city,the number of motor vehicles has shown a rapid rising trend,the vehicle exhaust pollution discharge effect on air pollution is increasingly enhanced.In this case,research on vehicle exhaust emission characteristics,analysis of the effect of different emission reduction scenarios,and provides scientific basis for solving the problem of city vehicle pollution.This paper takes Hefei city as the study area.Through the calculation of the list of motor vehicle exhaust emission characteristics of Hefei city in 2015,Hefei motor vehicle exhaust,and different models of the share rate,results show that in 2015 in Hefei City,CO,NOx,HC three kinds of pollution emissions are 153883 tons,42910 tons,18715 tons.for CO,mini bus.The larger share rate of large passenger cars and light trucks,3 models of contribution rate of CO reached 85.1%,especially small passenger cars,CO emission CO accounted for 62.1% of the total emissions;for NOx,heavy duty vehicles are the main contributors,heavy goods vehicles share rate reached49.1%,followed by small passenger cars,large passenger cars,the share rate were22.1%,16.7%;for HC,small bus sharing rate is highest,the share rate is 58.6%,another large bus sharing rate reached 21.5%.Emission reduction scenario analysis,this paper uses the GM(1,1)model to predict the number of vehicles in Hefei city in 2016-2020,and then by setting up the emission standard(HOR),eliminating the yellow car(ESV)and the development of public transport(PTP)these 3 control scenarios 2016-2020 estimation in three different control scenarios CO,NOx,HC pollutant emissions,results show that in 2020 and compared to the baseline scenario,the optimal rate subtracted HOR scenarios,The CO,NOx,and HC removal rates of 3 pollutants were 28.8%,33.1%,26.3%.,respectively.Based on the analysis of the characteristics of motor vehicle emission in Hefei and the study of emission reduction scenarios,some suggestions on the prevention and control of motor vehicle pollution in Hefei are put forward.