Simulating Studies Of The Effect Of The Popularization Of Electric Vehicle On Air Pollution In Jiangsu Province

With the rapid development of Chinese economy and automobile industry process,Jiangsu province,as the economic province in China,which has the rapid increase of vehicle ownership and vehicle exhaust is one of the main sources of air pollution in Jiangsu province.Therefore,electric vehicles will be the trend of automobile industry in the future and it is meaningful to study the improvement of air quality under different popularization rate of electric vehicles in Jiangsu province.In this paper,a vehicle emission calculation model(MOBILE)was used to calculate the emission factor and pollutants emission of 13 cities in Jiangsu province under different popularization rate of electric vehicles during winter in 2015.The reduction proportions,were attained by comparing the emission of different situation,were used to change the transportation of MEIC(Multi-resolution Emission Inventory for China)and WRF-Chem was used to simulate Jiangsu province with updated emission inventory during January 2015.The paper concludes the following conclusions:(1)The emission factors of vehicle were affected by different factors,Reid Vapor Pressure(RVP)has a great effect on the emission factors of CO and VOC,the average speed has influence on CO,NOx and VOC,CO is the most sensitive to temperature.(2)The emission of CO,NOx and VOC in various regions of Jiangsu decreased and SJ(south of Jiangsu)>CJ(cental of Jiangsu)>NJ(north of Jiangsu)when light-duty passenger cars were replaced by electric vehicles in the future.(3)The characteristics of meteorological field in Jiangsu province can be simulated greatly by WRF-Chem,which has the best effect on temperature simulation and the correlation coefficient is up to 0.84.Except O3,the correlation coefficients of other pollutants are above 0.6.(4)The concentration of pollutants in Jiangsu was affected when electric vehicles substitute light-duty passenger cars during winter.The concentrations of CO,NO2 and NO had a percentage of the drop when electric vehicle substitute 100%light-duty passenger car.The overall concentration decreased respectively 40-120μg/m3,2-5μg/m3,2-10μg/m3,which had a good effect of reducing emission.The concentrations of SO2,PM2.5 and PM10 were only slightly decreased,which was less than 1μg/m3.O3 concentration was increased by reducing transportation emission because of the influence of NQx,which was more than 1μg/m3 in most area of Jiangsu.