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노후 운행경유차의 NOx 배출특성분석 및 조기폐차대책을 통한 삭감 방안 검토
길지훈,임윤성,김형준,노현구,윤보섭,이상은,이태우,김정수,최광호,Keel, Jihoon,Lim, Yunsung,Kim, Hyungjun,Roh, Hyungu,Yun, Boseop,Lee, Sangeun,Lee, Taewoo,Kim, Jeongsoo,Choi, Kwangho 한국액체미립화학회 2017 한국액체미립화학회지 Vol.22 No.3
Currently, the proportion of diesel vehicles in all automobile has grown significantly over the past few years. Air pollutant also grew up and became a social problem. In particular, the issue of NOx emissions caused by NOx high emission in real driving has become a global issue. Despite the fact that the regulatory and reduction project of the new vehicle is actively carried out, there are no existence regulations of In-use diesel vehicle's NOx emission. Therefore, the emission characteristics of the in-use diesel vehicles were investigated to seek ways to reduce NOx emissions in this study. The test targets were used in 237 close inspection of exhaust gases and model year varied from 1996 to 2011. However, the classification of emissions by emission standards differed considerably from NOx emissions. This means that the selection method for early retirement targets should be converted from model year to amount of emissions. If the current early retirement program was applied to the existing system, pre-Euro 3 was 22.530 g/km and Euro 4 was 21.810 g/km to NOx reduction. However, when the vehicle was changed to high emission target vehicle, NOx reduction increase maximum 84.705 kg/yr. According to the study results, an effective reduction in NOx emissions can be achieved if an earlier target in expanded to Euro 4 vehicles.
도로 기반시설 개선과 교통흐름 변화에 따른 소형 경유자동차의 대기오염물질 배출특성
길지훈 ( Jihoon Keel ),이태우 ( Taewoo Lee ),이상은 ( Sangeun Lee ),정성운 ( Sungwoon Jung ),윤보섭 ( Boseop Yun ),김정수 ( Jeongsoo Kim ),최광호 ( Kwangho Choi ) 한국액체미립화학회 2016 한국액체미립화학회지 Vol.21 No.4
Changes in road infrastructure affect driving patterns and pollutant emission characteristics. we analyzed the changes in driving patterns and pollutant emission characteristics of the driving route via measured driving patterns at year 2009 and 2016. Since 2009, there has been an increase in population and traffic demand, including residential areas and industrial facilities. Traffic conditions were improved such as the opening of the highway Inter-Change to Seoul and the construction of underground driveway. As a result, the average vehicle speed increased. More detail comparisons have made on the changes of the underground driveway section and the crossroad section, which are expected to have significant changes in the transportation infrastructure. The vehicle speed distribution of the underground driveway changed from low speed to high speed, and the increase of the time spent at the high speed and high load caused the increase of NO<sub>x </sub>emissions. The vehicle speed also increased at the crossroad section, and the consequence NO<sub>x</sub> and CO<sub>2</sub> emissions decreased. It is mainly because the decreased time spent at idle, which results from the proper traffic demand management at this area.