基于MOBILE6.2的北京市出租车排放污染物分析

Analysis of emission pollutants from Beijing taxi based on MOBILE 6.2

利用MOBILE6.2模型计算了2000年、2005年及2008年北京市出租车的排放因子,同时,计算了北京市出租车2005年更换部分旧车以及2008年更换全部旧车以后,相对于2000年污染物的降低总量。结果表明,排放污染物随更换车型大大下降。HC排放物的总量下降了1779.4T,CO排放物的总量下降了13304.3T,NOx排放物的总量下降了684.4T。2008年完成出租车全部更换后,相对于2000年,HC排放物的总量下降3097.9T,CO排放物的总量下降17483.5T,NOx排放物的总量下降了1211.8T。同时,还估算了2000年和2008年其他类型机动车的排放因子及污染物的排放总量,并计算了各车型对排放的贡献率。

This paper has made a detailed calculation of the emission factors of 2000, 2005 and 2008 for taxi vehicles in Beijing respectively by means of the MOBILE 6.2. From the calculation of the emission pollutants, it can be concluded that the emission rates have been greatly reduced due tO the change of the vehicle types. According to the statistics, the amount of the HC was reduced by 1 779.4 T, the amount of CO reducod by 13 304.3 T, and the amount of NOx reduced by 684.4 T as a result of changing types of the taxi in 2005. From the same information ehannel, the amount of the HC was reduced by 3 097.9 T, the amount of CO reducod by 17 483.5 T, and the amount of NOx reduced by 1 211.8 T as a result of changing all of the taxi in 2008. No doubt, there are still other factors that may affect the emission. In addition to the above calculation, this paper has also estimated the reduction of the total amount emissions in 2000 and in 2008, whieh might also result from the changes of other types of motor vehicles with the contribution to the reduction rate by improving other types of vehicles in the urban area of Beijing.