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EURO-Ⅳ대응 상용디젤엔진의 SCR 시스템 적용에 따른 나노입자 배출 특성(Ⅱ)
이천환(Chunhwan Lee),오광철(Kwangchul Oh),김덕진(Deokjin Kim),이종인(Jongin Lee),전성용(Sungyong Jeon),이춘범(Chunbeom Lee),이동인(Dongin Lee),김상호(Sangho Kim),한현식(Hyunsik Han),배재호(Jaeho Bae),김은석(Eunseok Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is well known that two representative methods satisfy the condition of EURO-Ⅳ regulation from EURO-Ⅲ. The first method is the reduction of NOx in an engine operation by utilizing EGR and the elimination of increased PM by DPF. However, it results in bad fuel efficiency. The second is the strategy to reduce PM and emit the high NOx concentration. In other words, the concentration of PM produced by high efficiency combustion sufficiently meets the requirement of regulation, and NOx generated in this process can be removed by SCR system. While it has a good fuel efficiency relative to the first method mentioned above, its social infrastructure is demanded. In this paper, the number distribution of nano PM has been evaluated analyzed by Electrical Low Pressure Impactor(ELPI) in case of Urea-SCR system applied. From the results, The particle number was increased slightly in proportion to the amount of urea injection on Fine Particle Region, whether AOC is used or not.
EURO-Ⅳ대응 상용디젤엔진의 SCR 시스템 적용에 따른 나노입자 배출 특성
이천환(Chunhwan Lee),오광철(Kwangchul Oh),김덕진(Deokjin Kim),이종인(Jongin Lee),전성용(Sungyong Jeon),이춘범(Chunbeom Lee),이동인(Dongin Lee),김상호(Sangho Kim),한현식(Hyunsik Han),배재호(Jaeho Bae),김은석(Eunseok Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is well known that two representative methods satisfy the condition of EURO-Ⅳ regulation from EURO-Ⅲ. The first method is the reduction of NOx in an engine operation by utilizing EGR and the elimination of increased PM by DPF. However, it results in bad fuel efficiency. The second is the strategy to reduce PM and emit the high NOx concentration. In other words, the concentration of PM produced by high efficiency combustion sufficiently meets the requirement of regulation, and NOx generated in this process can be removed by SCR system. While it has a good fuel efficiency relative to the first method mentioned above, its social infrastructure is demanded. In this paper, the number distribution of nano PM has been evaluated analyzed by Electrical Low Pressure Impactor(ELPI) in two different case of engine condition, EURO-Ⅲ base engine with DPF system and EURO-Ⅳ level engine(modified from EURO-Ⅲ) with SCR system. From the result of this study, the number distribution of nano PM in a modified EURO-Ⅳ engine was similar level compared to the result of EURO-Ⅲ engine installed DPF system. In case of EURO-Ⅳ engine with SCR system, the particle number was increased slightly in proportion to the amount of urea injection on big size particles, whether AOC is used or not.
Kyungseok Lee,Byungchul Choi,Chunbeom Lee,Kwang Chul Oh 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.90 No.-
This study aims to investigate the catalytic performance of 2Cu/ZSM-5 with different SiO2/Al2O3 ratios(30, 75, and 90) for selective catalytic reduction (SCR) of NOx by C3H6. The coexistent CO and H2 in theC3H6-SCR process were also evaluated to further improve the de-NOx performance. The SiO2/Al2O3 ratiosand coexistent CO and H2 significantly affected the de-NOx performance and its operating temperaturewindow. The addition of 1 wt.% metal additives (Pt, Ce, Sn, and Mn) to 2Cu/ZSM-5 exhibited a distinctimprovement in catalytic performance. Among the metal-additive catalysts, 2Cu1Sn/ZSM-5 demonstratedfavorable NOx conversion in the H2- or CO-C3H6-SCR process owing to the enhancement of partialoxidation of C3H6 by H2. This resulted in improved low-temperature catalytic performance, without anyaccompanying side reactions that produce NH3, N2O, and HNCO.
EURO-Ⅳ 대응 배기정화 시스템 설계 및 최적화 기술 개발
이천환(Chunhwan Lee),이춘범(Chunbeom Lee),김성중(Sungjoong kim),서동규(Dongkyu Seo),유영면(Yungmyun Yoo),이동인(Dongin Lee),한현식(Hyunsik Han) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Limited petroleum fuel and green house effect are increasing the necessity of CO₂ reduction policy of every country and high fuel efficiency automobile. The one way in the present is diesel fueled vehicle is applied to satisfy these requests. In case of diesel vehicles, there is a synergy more than 20% fuel efficiency compared with gasoline vehicles but particle material and nitrogen oxide emissions are remained to overcome.<br/> In this paper, diesel after-treatment and cooled EGR systems are evaluated and tested s that optimal technologies are developed for simultaneous PM/NOx reduction to meet the EURO-Ⅳ regulation. For the DePM, three different size hybrid DPF (DOC+catalyzed DPF) systems are used and for the DeNOx, cooled EGR (CEGR) system is used. At the results of evaluation and test on 3.3L EURO-Ⅱ diesel engine, the HDPF systems had 85-90% PM reduction rate ad CEGR systems are achieved to 30%-60% NOx reduction rate. <br/> From the results, if these technologies are applied to EURO-Ⅲ engine, the emission level will be estimated enough to satisfy the EURO- Ⅳ regulation.
워크플로우 관리 시스템 기반의 FRACAS 프로세스 개발
이재훈(JaeHoon Lee),김기영(GiYoung Kim),설동진(DongJin Seol),김선진(SeonJin Kim),박부희(BooHee Park),정기윤(KiYun Jeong),김성곤(SeongGon Kim),이춘범(ChunBeom Lee),장중순(JoongSoon Jang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Failure reporting, analysis, and corrective action system (FRACAS) is a closed-loop procedure for analysis and correction of root failure causes of system, product or service. In this study, we use workflow management system (WfMS) for developing and implementing FRACAS process. WfMS authorizes failure engineers to manage their processes in addition to providing fundamental FRACAS functions such as document management, failure reporting and failure analysis. On the basis of WfMS, failure engineers can design FRACAS processes with process designer, and the processes can be modified and customized. WfMS also makes a role of framework for integrating failure analysis system and database management system. We develop prototype FRACAS process using open-source WfMS to represent that proposed methodology is improved in terms of system functionality and extensibility.