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Urea-SCR 시스템에서 De-NO<SUB>x</SUB> 성능 향상을 위한 배기관 설계 최적화에 관한 실험적 연구
이재균(Jae-Kyoun Lee),윤여빈(Yu-Bin Yoon),송춘섭(Chun-Sub Song),박영준(Young-Joon Park),조용석(Yong-Seok Cho),주재근(Jae-Geon Joo),김현옥(Hyun-Ok Kim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The selective catalytic reduction(SCR) system is potentially a highly-effective means of NOx reduction for diesel engine. Generally, SCR makes use of a reductant added to the exhaust gas that can be used for reacting nitric acids to nitrogen. The reductant, ammonia(NH₃) generated from a liquid urea-water solution. The ideal ratio of NH₃ molecules to NOx molecules is 1:1 based on NH₃ consumption and having NH₃ available for reaction of all of the exhaust NOx. The SCR system has good NOx conversion performance in the temperature window about 250 to 400℃, low space velocity also leads to increase of NOx conversion efficiency, due to long residence time in the catalyst. In this paper, Urea-SCR system has tried to find the optimal shape of the exhaust pipe for improvement of de-NOx performance. This study used the blade-type mixer and various pipes for reduction at up stream of catalyst to improve the uniformity. As a result, the de-NOx performance of Urea-SCR system was improved and exhaust geometry was optimized, too.
1-D 시뮬레이션을 이용한 차량용 냉방 성능예측에 관한 연구
이재균(Jae-Kyoun Lee),조용석(Yong-Seok Cho),김광연(Kwangyeon Kim),장길상(Kilsang Jang),지용준(Yongjun Jee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Current global warming and depletion of oil resources is a global concern. Almost country use to regulate CO₂ for Global warming and depletion of oil resources to solve problems. Therefore, many automotive industry try to reduce emissions of CO₂. Among them, good air cooling system performance in the car can reduce fuel consumption. So we have to improve the cooling performance of the car’s cooling system. So this study is that to improve car’s cooling system performance prediction. And this study used 1-D simulation to conduct that each element in the cooling system and prediction the performance of the entire cooling system.