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수소첨가 LPG기관의 성능 및 배출가스 특성에 관한 실험적 연구
김호정(Hojeong Kim),김기종(Kijong Kim),이성욱(Seangwook Lee),조용석(Yongseok Cho) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
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 LPG fuel in LPG engine and is to clarify the effects of hydrogen enrichment in LPG 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 LPG engine. The experiment was conducted at 2000rpm, bmep 2bar, 4bar conditions while changing 0, 5, 10, 20% hydrogen substitutions. The results mentioned that the combustion duration was shortened due to rapid flame propagation velocity of hydrogen. These phenomena were attributed to the burning velocity which increased exponentially with the increased hydrogen fraction in the hydrogen-LPG fuel blend. Hydrogen has much wider flammable limit than methane, propane or 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 due to high rate of heat release for hydrogen substitutions.
LPG 기관의 수소 분사비율에 따른 냉간시동시 미연탄화수소 배출특성에 관한 실험적 연구
이영재,김형근,방태석,이재웅,조용석 한국수소및신에너지학회 2015 한국수소 및 신에너지학회논문집 Vol.26 No.4
Finding an alternative fuel and reducing environmental 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 LPG fuel in a LPG engine. An experimental study was carried out to obtain fundamental data for the emit HC emission characteristics at cold start of pre-mixed LPG and hydrogen in a LPG engine with various fractions of hydrogen-LPG blends. To maintain equal volume ratio of fuel blend, the amount of HC was decreased as hydrogen was gradually added. The results showed that as hydrogen increases, in-cylinder pressure increased. Also emission of unburned hydrocarbon (HC) is sharply decreased.
LPG기관의 부분부하 조건에서 수소 혼합에 따른 성능 및 배출가스 특성에 관한 실험적 연구
김인구,김기종,이성욱,조용석 한국수소및신에너지학회 2013 한국수소 및 신에너지학회논문집 Vol.24 No.3
The purpose of this study is to obtain low-emission and high-efficiency by hydrogen enriched LPG fuel in LPG engine and is to clarify the effects of hydrogen enrichment in LPG 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 LPG engine. The research was held by changing the hydrogen ratio to 0, 5, 10, 20% in 1500rpm, bmep 2 and 4bar. The result turned out that the combustion duration was shortened due to fast flame propagation of hydrogen. And the amount of Carbon dioxide and Hydrocarbon decreased. However, the amount of NOX increased, which is thought to be the result of high adiabatic flame temperature of hydrogen. It has been confirmed that this phenomenon has changed by the Hydrogen mixing ratio.
정적연소기내 H2-LPG 연료의 혼합 비율에 따른 연소 및 배출가스 특성에 관한 실험적 연구
이성욱,김기종,고동윤,윤여빈,조용석 한국수소및신에너지학회 2012 한국수소 및 신에너지학회논문집 Vol.23 No.3
Finding an alternative fuel and reducing environmental 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 LPG fuel in constant volume chamber. An experimental study was carried out to obtain fundamental data for the combustion and emission characteristics of pre-mixed hydrogen and LPG in a constant volume chamber (CVC)with various fractions of hydrogen-LPG blends. To maintain equal heating value of fuel blend, the amount of LPG was decreased as hydrogen was gradually added. Exhaust emissions were measured using a HORIBA exhaust gas analyzer for various fractions of hydrogen-LPG blends. The results showed that the rapid combustion duration was shortened, and the rate of heat release elevated as the hydrogen fraction in the fuel blend was increased. Moreover, the maximum rate of pressure rise also increased. These phenomena were attributed to the burning velocity which increased exponentially with the increased hydrogen fraction in the H2-LPG fuel blend. Exhaust HC and CO2 concentrations decreased, while NOX emission increased with an increase in the hydrogen fraction in the fuel blend. Our results could facilitate the application of hydrogen and LPG as a fuel in the current fossil hydrocarbon-based economy and the strict emission regulations in internal combustion engines.