基于车载的天津市不同交通流特征下机动车排放率精细分析
Subtle-analysis of vehicle emission rate based on on-board measurement in different traffic times in Tianjin
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摘要: 利用OBS2200车载测试系统，对天津市的道路行驶车辆进行测试，在3种不同交通流特征（交通高峰期、低峰期和平峰期）下获得了道路车载排放污染物（HC、CO、NOx和CO2）的逐秒数据，结果显示，高峰期HC和CO平均排放率（0.027±0.018 g/s 和0.330±0.196 g/s）明显高于低峰期和平峰期，大约分别是低峰期的5.4倍和4.3倍，平峰期的3.9倍和9.2倍。低峰期NOx和CO2平均排放率（0.006±0.006 g/s和1.904±0.960 g/s）稍高于高峰期和平峰期。加速工况下4种排放物的平均排放率：0.022±0.019 g/s、0.243±0.234 g/s、0.007±0.007 g/s和1.766±0.946 g/s，大约分别是减速工况下4种排放物平均排放率的1.1倍、1.4倍、2.3倍和1.9倍。随着加速度增大4种排放物的排放率逐渐增大。Abstract: By using OBS2200 on-board vehicle emission measurements， the emission rates of HC， CO， NOx and CO2 by seconds in three different periods of traffic flow State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control，(high traffic flow， low traffic flow and normal traffic flow) were obtained in Tianjin. The results suggested that the average emission rates of HC and CO during high traffic flow (0.027±0.018 g/s and 0.330±0.196 g/s) were 5.4 and 4.3 times those during the low traffic flow， and were 3.9 and 9.2 times those during the normal traffic flow. The average emission rates of NOx and CO2 (0.006±0.006 g/s and 1.904±0.960 g/s) during low traffic flow were slightly higher than those during high traffic flow and normal traffic flow. Under acceleration conditions， the average emission rates of HC， CO， NOx and CO2 were 0.022±0.019 g/s、0.243±0.234 g/s、0.007±0.007 g/s and 1.766±0.946 g/s， which were respectively 1.1， 1.4， 2.3 and 1.9 times the deceleration conditions. With acceleration increased， the emission rates of four kinds of pollutants increased gradually.
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Key words:
- vehicle emission /
- on-board measurement /
- Tianjin
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