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물 분사와 Urea-SCR 시스템에 의한 NOx 저감 효과에 관한 연구
남정길(Jeong-Gil Nam) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
In this paper, the effects of a WI(Water Injection) in the intake pipe and an urea injection in the exhaust pipe for a 4-cylinder DI(Direct Injection) diesel engine are investigated from an experimental view point. The WI system was controlled by the duty cycle of the intake manifold's temperature and MAF(Manifold Air Flow). Also, the injected urea quantity was controlled by NOx quantity and MAF. I have tested 8 kinds of items that were with the EGR base engine and without the EGR engine. Then I tested each WI system, each urea-SCR system and each Tandem system. As the results, I can calculate the stoichiometric urea flow(SUF) and make the NOx map. Also, I can visualize the NOx results by variation of engine speed and engine load. Therefore, I knew that the NOx reduction effects were more the tandem system without the EGR engine than with the EGR base engine.
아두이노 센서를 활용한 폐유리 발포비드 혼입 식생블록의 온습도 유지성능 평가
길민우 ( Gil Min-woo ),김규용 ( Kim Gyu-yong ),편수정 ( Pyeon Su-jeong ),최병철 ( Choi Byung-cheol ),김문규 ( Kim Moon-kyu ),남정수 ( Nam Jeong-soo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
Recently, heat island and dry island phenomena occur frequently due to land surface development and excessive energy consumption in urban areas. As a result, the surface temperature of the building and the entire temperature of its surroundings are increased, and as a result, the durability of the building is rapidly deteriorated. In order to suppress these causes, a method of maintaining the temperature of road heating wires was implemented as a temporary measure, but this did not predict climate change. Therefore, this study is a method to measure the compressive strength, density, and thermal conductivity of lightweight concrete using waste glass foam beads. After fabricating a simple chamber, the temperature and humidity of the inside and outside were measured with an Arduino device in consideration of external factors. Therefore, if waste glass foam beads made through proper mixing are constructed in the urban center, the quality of the urban can be improved.
MCH로 전처리한 이종연료 사용시 디젤엔진의 NOx와 Soot 배출특성에 관한 연구
남정길(Jeong-Gil Nam),박남도(Nam-Do Park),강대선(Dea-Sun Kang) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
The objectives of this study is to explore alternative ways of blending different fuel oils with mixing clean heater (MCR) as pre-refinery treatment for proper diesel engine operation. Two separate experiments were carried-out on two fishing / survey vessel with the main engine (MIE) and generator engine (G/E) which operated on marine gas oil (MGO). The first vessel (Mu-Gunghwa 24) was tested with five different samples of fuel mixtures, from marine diesel oil (MDO), Bunker A, MF15, MF60 and MFIOO. The second vessel (Toolees 79) was tested with only three different samples of fuel mixtures namely MF60, MFI50 and MFl80 as alternative for MGO. During both experiments, the MCH system was installed and different fuel oil samples were employed for the M/E and the G/E. Furthermore, the NO, emission and soot concentrations were monitored and verified with electronic instruments. The results confirmed the compatibility of some fuel oil types to the engines and meeting the emission standards. MDO, MF 15 and Bunker A can be used in place of MGO for the engines (M/E, GIE), but the results still needs further corrosion testing.
연료의 성분에 따른 디젤엔진의 Emission 특성에 관한 연구
남정길(Jeong-Gil Nam),이돈출(Don-Chool Lee),강대선(Dea-Sun Kang) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
Sulphur Oxides(SOx), Nitrogen Oxides(NOx), Carbon Dioxides (CO₂) and particulate matters(PM) are the main air pollutants emitted from ships. The NOx emission has been regulated by the 2000 NOx Technical Code and maybe further reinforced from its present level in 2008. Moreover, the fishing industry is equally faced by the increasing cost of fuel oils nowadays. Thus, it is a necessity for this industry to explore on some alternative fuels and, at the same time, comply with the different emission regulations. For this study, an experiment was conducted on a test vessel (fishery survey vessel) with the main engine and generator engine operated on expensive marine gas oil (MGO). During the experiment, two pre-refinery systems were installed and different fuel oil samples were employed for the MIE and the G/E. Other verified items include the NOx emission, soot concentration, mean effective pressure, and exhaust gas temperatures. The results confirmed the compatibility of some fuel oil types with the engines and meet the emission standards without having adverse effect on the mean effective pressure.
남정길,Nam Jeong-Gil 한국마린엔지니어링학회 2005 한국마린엔지니어링학회지 Vol.29 No.6
The effects of a WI(Water Injection) at the intake Pipe and an urea injection at the exhaust pipe for a 4-cylinder DI(Direct Injection) diesel engine were investigated experimentally The water quantity was controlled by temperature of intake manifold and MAF(Manifold Air Flow). In addition, the urea quantify was controlled by NOx quantify and MAF. Effects of WI system, urea-SCR system and tandem system were investigated for with and without EGR(Exhaust Gas Recirculation). As the results. the SUF(Stoichiometric Urea Flow) and NOx map were obtained. In addition, NOx results can be visualized with engine speed and engine load. It was concluded. therefore, that the NOx reduction effects of the tandem system without the EGR were more than those with the EGR base engine.
스마트 환경 센서를 활용한 폐유리 골재 기반 식생블록의 온/습도 특성
길민우 ( Gil Min-woo ),김규용 ( Kim Gyu-yong ),편수정 ( Pyeon Su-jeong ),최윤성 ( Choi Youn-sung ),박종엽 ( Park Jong-yeop ),남정수 ( Nam Jeong-soo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.2
Recently, heat island and dry island phenomena occur frequently due to land surface development and excessive energy consumption in urban areas. As a result, the surface temperature of the building and the entire temperature of its surroundings are increased, and as a result, the durability of the building is rapidly deteriorated. In order to suppress these causes, a method of maintaining the temperature of road heating wires was implemented as a temporary measure, but this did not predict climate change. Therefore, this study is a method to measure the compressive strength, density, and thermal conductivity of light weight concrete using waste glass foam beads. After fabricating a simple chamber, the temperature and humidity of the inside and outside were measured with an Arduino device in consideration of external factors. Therefore, if waste glass foam beads made through proper mixing are constructed in the urban center, the quality of the urban can be improved.