在用汽车排气污染物和对大气污染分担率的研究

In-use Vehicle Emission Pollutants and Their Contribution to Air Pollution

通过在用汽车(发动机)各工况下排气污染物试验,得到其排放因子和线源源强,采用示踪剂(SF6)试验方法,计算出北京两条典型路段汽车排气污染物扩散参数,并验证评价了高斯烟羽扩散模式对汽车排气污染物扩散规律的适用性,得出公路(街道)汽车排气污染物浓度分布。本研究在我国首次提出了汽车排放对大气污染分担率的一套计算方法。

This paper presents the findings from vehicle emission tests under different operation modes.The emission dispersion parameters and the emission pollutants for two typical road sections in Beijing area were evaluated,based on the emission factors and linear source density derived from the test by using SF6 tracer. The adaptability of Gauss fume dispersion model is discussed in the paper and a comprehensive calculation method introduced for vehicle emission pollutants' contri- bution to air pollution in China.