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아이들링 시 배기시스템 용적이 SI 기관의 연소특성에 미치는 영향
노형철,박경석,손성만,Noh, Hyung-Chul,Park, Kyoung-Suk,Son, Sung-Man 한국자동차공학회 2007 한국 자동차공학회논문집 Vol.15 No.4
We research into the exhaust system volume what proving the optimum exhaust performance and combustion characteristics. Many automobile manufactures have developed complex exhaust system for environment regulation and noise reduction. This complex exhaust system provides acoustics silencing and low frequency noise for customers demand. Recently, automobile exhaust system have made the Dual muffler concerning to the noise and vibration reduction. Also it bring the engine performance down by decreasing the back pressure and temperature in the exhaust system. The experiments are carried out different volume of exhaust system. In order to establish the optimized conditions design factors which are taking exhaust system volume, it show how the exhaust performance influence on the engine performance in idling.
연료전지 개질기용 증발기의 작동유체 흐름 방향에 따른 열특성에 관한 연구
서호철(Ho-Cheol Suh),노형철(Hyung-Chul Noh),박경석(Kyoung-Suk Park) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Steam reformer was organized with steam reforming process and CO removing process. The steam reforming process needed high temperature, 600~900℃, for catalytic-reaction which was extract of hydrogen from steam and hydrocarbon. In this paper, miniaturization and performance improvement for the operation of the evaporator according to the direction of fluid flow to investigate the thermal characteristic. The thermal characteristic was investigated mass flow rate, specific heat, and temperature difference of working fluid. In addition, the fuel cell reformer was to secure the reliability attached to the actual reformer and operated.