소형 선박 디젤엔진의 질소산화물 저감에 관한 연구

심한섭(Han-Sub Sim) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.5

Air pollutants from a small marine diesel engine are increasing and the IMO(International Marine Organization) regulation asked for its reduction. In this study, NOx reduction technologies such as improvement of various cooling systems are applied to the small marine diesel engine. The various cooling systems are a intercooler, a heat exchanger for engine coolant, and an exhaust manifold by water cooling. These systems are tested on an engine dynamometer and a exhaust gas analyzer by a marine diesel engine test regulation. Test results are shows that the small marine engine are satisfied the IMO NOx regulations; Tire Ⅱ.

대응출력에 따른 선박용 과급기에 의한 디젤기관의 배출특성 비교 연구

이치우,안국찬,김봉환 한국기계기술학회 2014 한국기계기술학회지 Vol.16 No.4

This is a thesis about the experiment of comparison characteristic of exhaust gas in the samecondition between diesel engine that is equipped turbocharger to increase effectiveness of the enginewhich is recently used in a lot of industry which requires high power. Resulting of the experimentturbocharger diesel engine according to response power, difference in low speed is not significant, but inhigh speed, effectiveness of turbocharger diesel engine is almost the same in four turbocharger. Inother hand, in exhaust gas experiment, high response power turbocharger model exhausts less NOX, butit doesn’t significantly affect the result when it comes with decreasing of CO2 and effectiveness ofsimilar power characteristic. As a result, the high response power turbocharger diesel engine iseconomically effective comparing with the low response power turbocharger diesel engine.

바이오중유 사용에 따른 배출가스 저감 특성 연구

이민호(Min-Ho Lee),박진성(Jin-sung Park),노경하(Kyeong-Ha Noh),김종렬(Jong-Ryeol Kim) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

As the interest on the air pollution is gradually rises at home and abroad, fuel and engine, boiler researchers have been working on the exhaust and greenhouse gas emission reduction from engine and boiler through a lot of approaches, which consist of new device design, innovative after-treatment systems (Scrubber, SCR, DPF et al.), using clean (eco-friendly alternative) fuels and fuel quality improvement. This research has brought forward two main issues : exhaust emissions (regulated and non-regulated emissions, PM particle matter, SO<SUB>x</SUB>) and greenhouse gases of engine and boiler. Exhaust emissions and greenhouse gases of engine and boiler had many problem that cause of ambient pollution, health effects. In order to reduce these emissions, new regulations have been created and applied in each countries. In this study, the characteristics of exhaust gas emitted when bio-fuel oil is used in marine engines and industrial boilers was studied. Compared to heavy oil, bio-fuel oil has been shown to have excellent environmental improvement effects such as reducing sulfur oxides, nitrogen oxides, fine dust and greenhouse gases in the exhaust gas. As a result of this, there is a need to review bio-fuel oil as a marine and industrial alternative fuel in order to cope with the regulation of sulfur content and reduction of greenhouse gases.

바이오중유 적용에 따른 선박용 엔진의 성능 및 배출가스, 부식 특성에 관한 연구

길기현,이민호,정진도 대한기계학회 2023 大韓機械學會論文集B Vol.47 No.1

As the interest on environment pollution has been gradually increasing at home and abroad, fuel and engine researchers have been working on the exhaust and greenhouse gas emission reduction from engines through several approaches such as new device design, innovative after-treatment systems for example, scrubber, SCR, and DPF, clean (eco-friendly alternative) fuel usage, and fuel quality improvement. In this study, the characteristics of performance, exhaust emissions, and metal corrosion when biofuel oils are used in marine engines was studied. Compared with heavy oils, biofuel oils have excellent environmental improvement effects such as reducing sulfur oxides, PM, Co, THC, and greenhouse gases in the exhaust gas. Therefore, biofuel oil must be reviewed as a marine and industrial alternative fuel to cope with the regulation of sulfur content, PM, and reduction of greenhouse gases. 국내·외에서 환경오염에 대한 관심은 급격히 증가하고 있으며, 연료 및 엔진 연구자들은 새로운 장치의 설계 및 획기적인 후처리장치(스크러버, SCR, DPF 등), 클린연료(친환경 대체연료), 연료 품질 개선 등 다양한 접근을 통해 엔진으로부터 배출가스나 온실가스를 줄이기 위해 노력하고 있다. 본 연구에서는, 바이오중유를 선박용 엔진에 사용하였을 때 성능 및 배출가스, 금속 부식 특성에 대해 연구를 진행하였다. 중유 대비 바이오중유는 배출가스에서 황산화물 및 입자상물질, 일산화탄소, 총탄화수소, 온실가스 등 훌륭한 환경 개선 효과를 보여주고 있다. 이러한 결과를 통해서, 황산화물 및 입자상물질(black carbon) 규제 및 온실가스 감축의 관점에서 선박 및 산업용 대체연료로서 바이오중유에 대한 검토가 필요하다고 할 수 있다.

선박용 디젤엔진의 배기배출물에 관한 연구

장세호 도립 강원전문대학 2000 道立 江原專門大學 論文集 Vol.3 No.-

Regional and national restrictions on air pollution have once been enforced through the legislation for environmental protection and the IMO(International Maritime Organization) adopted the regulations for the prevention of air pollution from ships as MARPOL 73/78 Annex Ⅵ in September, 1997. The effect of this convention is expected to be about year 2003 but the restriction for NOx is applied to each diesel engine with a power output of more than 130 KW which is installed on a ship constructed, which undergoes a major conversion on or after 1 January 2000. This study was investigated for various exhaust gas emissions in marine diesel engine. As a result, The CO_(2) and NOx increase with increasing load of marine engine. The CO_(2), CO, and NOx decrease with increasing supercharger pressure in manifold of diesel engine. Then the CO decrease with increasing cooling fresh water temperature of diesel engine.

Numerical Simulation of Methane Slip in Dual Fuel Marine Engines

Jaehyun Han(한재현),Michael Vincent Jensen,Kar Mun Pang,Jens Honore Walther,Jesper Schramm,Choongsik Bae(배충식) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11

The methane slip is the problematic issue for the engines using natural gas(NG). Because methane is more powerful greenhouse gas (GHG) than CO₂, understanding of the methane slip during gas exchange process of the engines is essential. In this study, the influence of the gas pipe geometry and the valve timings on the methane slip was investigated. MAN L28/32DF engine was modeled to simulate the gas exchange process of the four stroke NG-diesel dual fuel engines. The mesh size of the model was decided based on the sensitivity study on the peak pressure of the cylinder and the fuel mass estimations. The simulations with various gas pipe geometries were conducted. It seemed that the effect of the change in injection direction is more dominant than the change in the gas hole configuration. The favorable injection direction for minimum amount of methane slip was discovered as the direction which helps developing the flow of methane far from the exhaust ports. The effects of various valve tuning settings were also simulated. The advancement of the exhaust valve closing was more efficient than the retardation of the intake valve opening. A little retardation of the intake valve opening even resulted in the increase of the amount of methane slip.

대응출력 200마력 선박용 과급기에 의한 디젤기관의 배출특성 연구

이기봉(Kibong Lee),이원욱(Wonuk Lee),이민형(Minhyoung Lee),이치우(Chiwoo Lee) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.11

This is a thesis about the experiment of comparison characteristic of exhaust gas in the same condition between diesel engine that is equipped response power 200HP turbocharger to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment with natural aspiration diesel engine and turbocharger diesel engine, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is much higher than the other one. In other hand, in exhaust gas experiment, turbocharger model exhausts more NOX and O2, but it doesn’t significantly affect the result when it comes with decreasing of CO2 and effectiveness of increased power characteristic. As a result, the turbocharger diesel engine is economically effective comparing with the natural aspiration diesel engine.

Performance failure simulation and characteristic analysis of marine diesel engine turbocharging and gas-exchange system under different running conditions

Yihuai Hu,Meng Wang,Cun Zeng,Jiawei Jiang 한국마린엔지니어링학회 2021 한국마린엔지니어링학회지 Vol.45 No.4

배기 후처리 시스템을 적용한 선박 디젤기관의 성능 특성에 관한 실험적 연구

조상곤 한국동력기계공학회 2023 동력시스템공학회지 Vol.27 No.6

Nitrogen oxides and PM, result from combustion of fossil fuels, contribute to a variety of environmental problems such as warm green house gases (GHGs). In order to meet the emission control regulations, exhaust after-treatment system is necessary for most diesel engine powered vehicles. Selective catalytic reduction is one of the most promising after-treatment technologies that reduce NOx emission efficiently. The aim of this work is to investigate the influence of NOx, PM on the exhaust emissions gas from marine diesel engine. This test diesel engine work on four-stroke cycle and was operated at 1,800 rpm by 0%, 25%, 50%, 75% and 100% engine load. The application of DPF and SCR technologies to any new application can introduce high regulation rules. It is important that the exhaust after-treatment system can be maintained at the same time to effectively reduce PM and NOx emissions. The experiment results showed that PM and NOx with exhaust after-treatment system were reduced to 82% and 92.8% at the engine full load.

스크러버型 EGR 시스템 디젤機關의 NO_x 및 煤煙排出物에 미치는 酸素濃度의 影響에 관한 硏究

裵明煥 慶尙大學校 工科大學 自動化및컴퓨터應用技術硏究所 1999 自動化 및 컴퓨터應用技術 Vol.6 No.1

The effects of recirculated exhaust gas on the characteristics of NO_x and soot emissions under a wide range of engine load have been experimentally investigated by a water-cooled, four-cylinder, indirect injection, four cycle and marine diesel engine operating at two kinds of engine speeds. The purpose of the present study is to develop the EGR control system for reducing NO_x and soot emissions simultaneously in diesel engines. The EGR system is used to reduce NO_x emissions, and a novel diesel soot removal apparatus with a cylinder-type scrubber for the experiment system which has 6 water injector(A water injector is made up 144 nozzles with 1.0 mm in diameter) is specially designed and manufactured to reduce the soot contents in the recirculated exhaust gas to intake system of the engines. The intake oxygen concentration obtained by the intake air flow and the oxygen concentration in the recirculated exhaust gas, and the exhaust oxygen concentration measured in exhaust manifold are used to analyse and discuss the influences of EGR on NO_x and soot emissions. The experiments are performed at the fixed fuel injection timing of 15.3°BTDC regardless of experimental conditions. It is found that NO_x emissions are decreased and soot emissions are increased owing to the drop of intake oxygen concentration and exhaust oxygen concentration as the EGR rate rises.