基于ES-VSP分布的交通状态对公交车动态排放的影响

发布时间：2018-07-08 11:41

  本文选题：交通状态 + 公交车　； 参考：《环境科学研究》2017年11期

【摘要】：为评估不同交通状态下公交车运行特征和排放水平的差异,现场采集广州市B9、226线路公交车的逐秒GPS数据,以ES-VSP(发动机负荷-机动车比功率)分布表征畅通、轻度拥堵和中度拥堵下的公交车运行特征,结合IVE(international vehicle emission)模型求得公交车平均排放因子并分析其差异.结果表明:(1)所测公交车的发动机低负荷区中bin11(-1.6ES≤3.1,-2.9 k W/t≤VSP1.2 k W/t)频率范围为50.55%~83.39%,中度拥堵时bin 11频率是畅通时的1.1~1.3倍;(2)3种交通状态下公交车的CO、VOC(运行产生的挥发性有机物)、VOCevap(蒸发产生的挥发性有机物)、NOx(氮氧化物)和PM(颗粒物)平均排放因子范围分别为7.63~11.40、0.26~0.46、0.68~1.56、0.32~0.51和0.72×10-2~1.28×10-2g/km;(3)同种交通状态下,主干路公交车专用道和BRT车道的公交车的大部分污染物平均排放因子低于次干路混行车道、主干路混行车道,中度拥堵时主干路BRT车道的CO、VOC、VOCevap、NOx和PM平均排放因子相对其他道路最低,分别为7.66、0.27、0.87、0.32和0.75×10-2g/km;(4)次干路混行车道、主干路混行车道的公交车污染物平均排放因子随交通状态愈加拥堵而增大,但畅通时主干路BRT车道的公交车行驶速度、加速度较高,导致CO平均排放因子较高,对应3种交通状态其比例为1.0∶0.9∶0.8.研究显示,交通状态对公交车运行和排放具有显著影响.
[Abstract]:In order to evaluate the difference of bus operating characteristics and emission level under different traffic conditions, the GPS data of bus on line B9226 in Guangzhou were collected on the spot and characterized by ES-VSP (engine load-vehicle specific power) distribution. The characteristics of bus operation under mild and moderate congestion were analyzed. The average emission factors of buses were calculated by using the Ive (international vehicle emission) model and their differences were analyzed. The results show that: (1) the frequency range of bin11 (-1.6ES 鈮，

本文编号：2107312