On-road particulate matter (PM2.5) and gaseous emissions in the Shing Mun Tunnel, Hong Kong
On-road particulate matter (PM2.5) and gaseous emissions in the Shing Mun Tunnel, Hong Kong
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DOI：
10.1016/j.atmosenv.2006.04.002
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发表时间：
2006-07-01
影响因子：
5
通讯作者：
Louie, P. K. K.
中科院分区：
文献类型：
--
作者：
Cheng, Y.;Lee, S. C.;Louie, P. K. K.
测定了香港城门隧道内混合动力车的PM2.5（空气动力直径小于2.5 μ m的微粒）、NOx （NO2和NO的总和）和CO的真实排放系数。在不同时间共进行了16次运行，其中包括柴油燃料车辆的不同交通部分。在研究期间，共有27,310辆车辆通过隧道，其中约50%为柴油燃料车辆，41%为汽油燃料车辆，9%为液化石油气车辆。来自DRI（美国沙漠研究所）颗粒采样器的PM2.5排放因子范围为0.066至0.190g / h(-1) km（-1）。经t检验，夏季和冬季PM2.5差异无统计学意义。PM2.5排放因子与NOx相关良好（R-2 = 0.65），且均与柴油车比例呈正相关。两台DustTrak空气监测仪也用于监测隧道内的PM2.5质量。DustTrak的平均发射因子为0.150 +/- 0.045 g veh(-1) km(-1)，与滤波法的0.131 +/- 0.037 g veh(-1) km（-1）基本一致，表明DustTrak空气监测仪可用于隧道研究，但需要用滤波法进行仔细校准。通过线性回归分析得到公路柴油车PM2.5质量和NOx排放因子分别为0.257 +/- 0.031和1.931 +/- 0.309 g veh(-1) km（-1）。(c) 2006 Elsevier Ltd.版权所有。
Real-world emission factors Of PM2.5 (particle's aerodynamic diameter of less than 2.5 mu m), NOx (the sum of NO2 and NO), and CO from mixed vehicles in the Shing Mun Tunnel in Hong Kong have been determined. A total of 16 runs were made during varying times that encompassed different traffic fractions of diesel-fueled vehicles. During the study, a total of 27,310 vehicles traversed the tunnel, comprising approximately 50% diesel-fueled vehicles, 41% gasoline-fueled vehicles, and 9% LPG-vehicles. The PM2.5 emission factors, derived from the DRI (Desert Research Institute, USA) particulate sampler, ranged from 0.066 to 0.190g veh(-1) km(-1). Result from a t-test showed no statistical significance for PM2.5 difference in summer and winter. The PM2.5 emission factors were found to correlate well with NOx (R-2 = 0.65) and both had a positive relationship with the proportion of diesel-fueled vehicles. Two DustTrak air monitors were also used to monitor PM2.5 masses in the tunnel. The mean emission factor derived from DustTrak, 0.150 +/- 0.045 g veh(-1) km(-1), had reasonable agreement with the filter method, 0.131 +/- 0.037 g veh(-1) km(-1), demonstrating that the DustTrak air monitor can be used in tunnel studies, but needs careful calibrations with the filter method. The emission factors for PM2.5 mass and NOx were obtained for on-road diesel-fueled vehicles based on the linear regression analysis and they were 0.257 +/- 0.031 and 1.931 +/- 0.309 g veh(-1) km(-1), respectively. (c) 2006 Elsevier Ltd. All rights reserved.