Contribution of evaporative emissions from gasoline vehicles toward total VOC emissions in Japan.
Contribution of evaporative emissions from gasoline vehicles toward total VOC emissions in Japan.
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DOI：
10.1016/j.scitotenv.2013.01.045
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Hiroyuki Yamada
中科院分区：
文献类型：
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作者：
Hiroyuki Yamada
分析了汽油车蒸发排放的特点。蒸发排放物的一个潜在来源主要是所谓的燃料箱的叹气，其是每日温度变化和未被燃料占据的体积的函数。提出了一个估算燃油蒸气产生量的理论公式。它很好地再现了观察到的特征，但低估了实验结果中获得的绝对值。广泛使用的半经验Reddy方程高估了结果。还评价了碳罐的性能。超过95%的燃油蒸汽被碳罐捕获。然而，该罐只工作了一天，因为它吸收的VOC比单独的叹息中所含的更多。为了估计真实的世界中的蒸发排放，当汽车停在室外停车场时，监测油箱温度的变化，发现几乎与环境空气温度的变化相同;没有其他天气条件有任何影响。根据这项研究的结果和汽车使用频率的数据，日本汽油车的年蒸发排放量估计为日本总VOC排放量的4.6%，使其成为第六大VOC来源。
The features of evaporative emissions from gasoline vehicles were examined. One potential source of evaporative emissions is mainly the so-called sigh of a fuel tank, which is a function of the daily temperature change and the volume not occupied by fuel. A theoretical equation was proposed for estimating the fuel vapor generation. It reproduced observed features well but underestimated the absolute values obtained in the experimental results. The widely used semi-empirical Reddy equation overestimates the results. The performance of a carbon canister was also evaluated. More than 95% of fuel vapor generation was trapped by the carbon canister. However, the canister worked for only one day because it adsorbed more VOC than that contained in the sigh alone. To estimate the evaporative emissions in the real world, the fuel tank temperature change while a car was parked in an outside car park was monitored and was found to be almost the same as the change in ambient air temperature; no other weather conditions had any effect. According to the findings in this study and data on frequency of car use, the annual amount of evaporative emissions from gasoline vehicles in Japan was estimated to be 4.6% of the total VOC emissions in Japan, making it the 6th-highest source of VOC.