500Ps급 상용차량 디젤엔진을 이용한 선박용 디젤엔진 개발 연구

심한섭(Han-Sub Sim) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.6

This study was carried out to develop a diesel engine for marine propulsion. This marine diesel engine was developed based on a 500Ps vehicle diesel engine. Many main parts, such as the intercooler, radiator, and engine controller were designed for the marine diesel engine. The intercooler was designed to be of sea water cooling type; inlet air is cooled by sea water. Engine coolant is cooled by sea water in the radiator too. The water cooling heat exchanger has high cooling performance. In the cooling system, consists of the intercooler and the radiator, the sea water passes through the intercooler and then the radiator, in sequence. This process is very effective compared to the reverse method in which sea water passes through the radiator and then the intercooler, in sequence. The control performance of the engine controller and the fuel injection rate were improved using an engine speed controller. This system was tested on an engine dynamometer and an exhaust gas analyzer using the marine diesel engine test method. Test results show that the 500Ps marine diesel engine satisfied the IMO NOx regulations; Tier Ⅱ.

A Model reference adaptive speed control of marine diesel engine by fusionof PID controller and fuzzy controller

유희한 한국마린엔지니어링학회 2006 한국마린엔지니어링학회지 Vol.30 No.7

The aim of this paper is to design an adaptive speed control system of a marine diesel engine by fusion of hard computing based proportionalintegralderivative (PID) control and soft computing based fuzzy control methods. The model of a marine diesel engine is considered as a typical nonoscillatory, secondorder system. When its model and the actual marine diesel engine are not matched, it is hard to control the speed of the marine diesel engine. Therefore, this paper proposes two methods in order to obtain the speed control characteristics of a marine diesel engine. One is an efficient method to determine the PID control parameters of the nominal model of a marine diesel engine. Second is a reference adaptive speed control method that uses a fuzzy controller and derivative operator for tracking the nominal model of the marine diesel engine. It was found that the proposed PID parameters adjustment method is better than the Ziegler& Nichols’ method, and that a model reference adaptive control is superior to using only PID controller. The improved control method proposed here, could be applied to other systems when a model of a system does not match the actual system.

소형 선박용 디젤엔진의 수냉식 열교환기 해석 연구

양영준(Young-Joon Yang),심한섭(Han-Sub Sim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.6

This study was carried out to improve the design of heat exchanger for small marine diesel engine. As air pollutants emitted from small marine diesel engine become international problem, IMO(International Marine Organization) tried to establish severe regulations for NOx reduction. The formation of NOx is affected by cooling system, for instance, such as intercooler, heat exchanger, exhaust manifold, and therefore cooling systems are one of essential parts for design of small marine diesel engine. In this study, heat exchanger for small marine diesel engine was modeled and simulated using CATIA V5R19 and ANSYS FLUENT V.13. Thermal flow simulation for heat exchanger was performed to find the optimal design. As the results, maximum velocity of engine coolant in shell inside was 9.1m/s and it was confirmed that outlet temperature and temperature drop for engine coolant could be calculated by simulating proportional relations of temperature between engine coolant and sea water.

선박용 디젤엔진의 진동해석 모델링 방안 및 축계 비틀림 진동에 의한 엔진 본체 연성진동에 관한 연구

김상진,박종훈,김정렬,이기수 한국마린엔지니어링학회 2018 한국마린엔지니어링학회지 Vol.42 No.4

A low-speed diesel engine which is used as the main propulsion engine for a ship is the main source of ship vibration. Therefore, it is necessary to predict the excitation force of the engine and vibration during the design stage to improve or avoid the unexpected vibration in order to secure vibration quality of the hull and engine. In this study, we proposed a method to generate an analytical model for engine vibration of 6G60ME-C type with ultra-long stroke of MAN Diesel & Turbo, which is being recently applied to the ship. The engine-body vibration analysis was carried out considering the coupled effect with being recently crankshaft torsional vibration and the validity of the analytical model was verified through comparison with the measured results. 선박용 주 추진기관으로 적용되는 저속 디젤엔진은 선박의 주요 기진원으로 양호한 선체 및 엔진 진동 품질 확보를 위해서는 사전에 엔진 기진력 및 진동을 예측하고 진동감소를 위한 개선방안을 수립하는 것이 필요하다. 본 연구에서는 최근 선박에 주로 적용되는 초장행정 엔진인 MAN Diesel & Turbo의 6G60ME-C Type 엔진 본체진동해석을 위한해석 모델생성 방안을 제안하고 생성된 해석모델을 활용하여 비틀림 진동과 연성된 엔진 본체진동해석을 수행하고 이를측정결과와 비교/검증함으로써 해석 모델의 정합성을 확인하였다.

전자식 선박디젤엔진의 엔진제어기 개발/연구

심한섭(Han-Sub Sim),이민광(Min-Kwang Lee),이강윤(Kang-Yoon Lee) 한국기계가공학회 2015 한국기계가공학회지 Vol.14 No.5

A control program of an engine control module (ECM) was developed, and its control performance was verified on a 750Ps marine diesel engine. The control method was designed for an engine rotational speed control system. For ECM hardware, the commercial rapid control prototype (RCP) ECM was used. The programming tool for control algorithm development was the MatLab/Simulink. The main control algorithm assembled many control models as engine cranking, run, and stall. Each model has sub-models to input/output control signals. The target engine speed was input signal from a speed control lever, and control output signal of the ECM was sent to the unit-injectors for fuel injection. The engine test was performed under various conditions of engine rotational speeds and dynamometer loads. The test results show that the control function of the ECM is suitable for electrical marine diesel engines.

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.

선박 디젤엔진 배출 미세먼지 저감을 위한 정전 여과 매연 집진기 개발에 관한 연구

김영훈,이건희,홍기정,김용진,김학준,박인용,한방우 한국입자에어로졸학회 2023 Particle and Aerosol Research Vol.19 No.4

In order to reduce particulate matters (PM) from marine diesel engines, we developed novel electrostatic diesel particulate matter filtration system. Electrostatic diesel particulate filtration (DPF) system consists of electrostatic charger and filtration part. The electrostatic charger and filtration part are composed of a metal discharge electrode and a metal fiber filter (porosity: 68.1-86.1%), respectively. In the electrostatic charger part, diesel soot particles are reduced by electrostatic force. The filtration part after electrostatic charger part reduces diesel soot particles through inertial and diffusion forces. The filtration efficiency of electrostatic DPF system was examined through the experiments using engine dynamometer system (300 kW) and ship (200 kW). The PM reduction efficiencies due to inertial and electrostatic forces showed about 70-75% and 80-90%, respectively, according to the RPM of the engine. The differential pressure of the electrostatic DPF system applied to the ship was about 1-9 mbar, which was less than the allowable differential pressure for ship engines in South Korea (100 mbar). The results show that the electrostatic DPF system is suitable for application to the PM reduction emitted from ships.

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.

Mean value first principle engine model for predicting dynamic behaviour of two-stroke marine diesel engine in various ship propulsion operations

Sui Congbiao,de Vos Peter,Stapersma Douwe,Visser Klaas,Hopman Hans,Ding Yu 대한조선학회 2022 International Journal of Naval Architecture and Oc Vol.14 No.1

Analysis of ship propulsion system performance is often performed using detailed hydrodynamic models to assess load changes, which are subsequently compared to static engine limits, or by detailed engine models that are rarely integrated with sufficiently detailed propulsion models for load change estimation. To investigate the dynamic engine (overloading) behaviour and ship propulsion performance under various heavy operating conditions, a Mean Value First Principle Parametric (MVFPP) engine model is integrated into a ship propulsion system model in this paper. An upgraded thermodynamic-based MVFPP model for two-stroke marine diesel engines is presented, in particular a newly developed MVFPP gas exchange model. Based on the integrated propulsion system model of a benchmark ocean-going chemical tanker, the engine dynamic behaviour during ship acceleration, deceleration and crash stop has been investigated. Results show that, during dynamic processes, the engine could be thermally overloaded even if the engine power trajectory is inside the static engine operating envelope. The paper contributes to finding proper indicators for thermal overloading of modern two-stroke marine diesel engines. It is demonstrated that when matching the engine with the propeller and designing the ship propulsion control system, not only the static engine operating envelope, but also the dynamic engine behaviour should be considered.

Performance and emission characteristics of additives-enhanced heavy fuel oil in large two-stroke marine diesel engine

Ryu, Y.,Lee, Y.,Nam, J. Butterworths [etc.] ; Elsevier Science Ltd 2016 Fuel Vol.182 No.-

The International Maritime Organization (IMO) Marine Environment Protection Committee (MEPC) has gradually strengthened the laws regulating ship exhaust emissions. The majority of ships designed for international voyages and powered by large two-stroke marine diesel engines use heavy fuel oil (HFO), which has the advantage of a low price compared to other types of fuel. However, HFO generates large amounts of harmful exhaust emissions during combustion in a marine diesel engine. In addition, as fuel costs account for a large portion of the expenditure budgets of the shipping companies that operate and manage such ships, fuel cost reduction is of considerable interest to such companies. In this study, two fuel additives, oil-soluble Ca-based and oil-soluble Fe-based organometallic compounds, which can improve the performance of diesel engines, were injected into HFO at fixed concentrations (¼000 and 1/6000 of the total fuel, respectively), in attempts to reduce fuel consumption and exhaust emissions. For enhanced experimental accuracy and reproducibility, a large two-stroke diesel engine installed in a land-based power plant was used as the test subject. Evaluative tests were conducted for three engine loads (50%, 75%, and 100%). The engine performance (i.e., the fuel consumption rate, maximum combustion pressure, and exhaust gas temperature) and the exhaust emissions (NOx, particulate matter (PM)) were analyzed before and after the fuel additive insertion.