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科技导报  2015 

机动车排放因子的隧道测试——以西安市为例

DOI: 10.3981/j.issn.1000-7857.2015.06.009, PP. 59-63

Keywords: 隧道实验,机动车污染物排放,排放因子

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Abstract:

为深入了解西安市机动车污染物的排放特征,选取代表性城区隧道进行机动车污染物排放浓度及排放因子的测试实验,获得了隧道入口和出口的PM2.5、CO、NOx、HC和VOCs等污染物的质量浓度,并结合气象数据和交通参数,计算了各污染物平均排放因子。结果表明PM2.5、CO、NOx、HC和VOCs的平均排放因子分别为(0.016±0.005)、(1.097±0.398)、(0.159±0.092)、(0.179±0.089)、(0.317±0.172)g/(km·辆)。不同时段的排放因子存在一定差异,并且PM2.5的排放因子显著小于气态污染物。此外,本次实验测得的排放因子小于国内先前多数研究结果,这可能与燃料品质、发动机效率、尾气排放控制技术和城市管理水平的提高有关。

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