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디젤기관에서 전기 히터 재생 여과 트랩의 특성에 관한 연구
류규현,박만재 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.1
Urgent increasing of the vehicles influence air pollution and the damage of the plants and animals. Particularly, exhausting particulate of diesel vehicles give serious effect to human life. Therefore, this study aim to reduce amount of particulate and to contribute developing after-treatment in diesel engine. Through the experimental and theoretical study about characteristics of the electric heat regeneration, various results are obtained.
수소첨가 CNG기관의 성능 및 배출가스 특성에 관한 실험적 연구
류규현,김인구 한국수소및신에너지학회 2015 한국수소 및 신에너지학회논문집 Vol.26 No.2
Recent research has focused on alternative fuel to improve engine performance and to comply with emission regulation. Finding an alternative fuel and reducing environment pollution are the main goals for future internal combustion engines. The purpose of this study is to obtain low-emission and high-efficiency by hydrogen enriched CNG fuel in SI engine and is to clarify the effects of hydrogen enrichment in CNG fuelled engine on exhaust emission and performance. An experimental study was carried out to obtain fundamental data for performance and emission characteristics of hydrogen enrichment in SI engine. The experiment was conducted at 2500 rpm, bmep 2 bar, 4 bar conditions while CNG fuel was mixed with 10, 20 and 30% hydrogen blends. From the experimental results, combustion duration was shortened due to rapid flame propagation velocity of hydrogen and these were attributed to the burning velocity increasing exponentially with increasing hydrogen blending ratio. Hydrogen has much wider flammable limit than methane, gasoline and the minimum ignition energy is about an order of magnitude lower than for other combustion. By adding hydrogen, CO2 and HC were reduced. However, NOX was increased dut to high rate of heat release for hydrogen substitutions.
기관 폐열 회수를 위한 열교환기의 Baffle 길이 변경에 따른 성능 예측에 관한 수치 해석적 연구
류규현(Ryu, Kyuhyenn),김구성(Kim, Kusung),이영훈(Lee, Younghum),강석호(Kang, Seokho),박기범(Park, Gibeom) 한국신재생에너지학회 2013 신재생에너지 Vol.9 No.4
A 2-loop waste heat recovery system with Rankine steam cycles for the improvement of fuel efficiency of gasoline vehicles has been investigated. A high temperature loop is used to recover waste heat from exhaust gas and a low temperature loop is used to recover waste heat from cold engine coolant. This paper has dealt with a layout of low temperature loop system, the review of the velocity contours through numerical analysis. According to the result of analysis, the designed heat exchanger. And comparing with flow analysis results, LT Boiler is safe to operation.