메탄올-가솔린 혼합연료의 기관성능에 관한 연구

沈炳珉 三陟大學校 2001 論文集 Vol.34 No.1

The results of this study about engine performance and organization due to the change of engine operating components for methanol-gasoline blend fuel, are as follows 1) The engine power output was increased according to the in crease of engine rpm, The change of engine of air-fuel ratio was maximum near the stoichiometry in each blend rate, and the engine power output due to the change of spart advance was maximum near the MBT in each blend rate 2) The optimum conditions of methanol-gasoline blend fuel were N=1400rpm, SA=35˚ btc in this experimental engine. The conditions were little changed due to the in crease of methanol blend rate and the optimum air-fuel ratio was reveled near the soichiometry in each blend rate. 3) BSFC was increased according to the soichiometry in each blend rate, and that of M-100fuel(methanol 100%) was increased 2 times compared with that of M-30 fuel. 4) The change in maximum rate of heat release was increased according to the increase of methanol blend rate, and this coincided with the tendency in the change of maximum pressure(Pmax)of cycle.

배기성능 개선을 위한 메타놀기관의 EGR 및 흡기가열의 효과

沈炳珉 三陟大學校 1997 論文集 Vol.30 No.1

The purpose of this paper is to investigate the relationship between the exhaust gas characteristic and engine performance through changing of engine operation factors when EGR apparatus and the inlet mixture heating system are employed for this experiment. The results are as follows 1. When EGR was operated, MBT have to be decided. for the engine were made optimal driveness in according to increasement of EGR percent. In this paper, could appear the relationship of MBT for EGR precent. In this paper, could appear the relationship of MBT for EGR percent and the variable of engine driving, also could made spacial Coordinate for the variable of engine driving, also could made spacial Coordinate for the variable of engine driving. 2. In according to the increasement of EGR change, NOx Concentrations were apparently decreased due to the increasement of EGR ratio. Though NOx concentrations were hardly diminished due to the effect of heating the inlet mixture, it is expect to diminished NOx Concentration from the extension of air-fuel ratio for every EGR change. 3. In according to the effect of EGR ratio, HC, CO concentrations were increased owing to the increasement of EGR ratio. HC, CO concentrations were decreased about 10.7% and 7.6% air-fuel ratio 6.5. 4. In according to EGR and heating of inlet, engine output is decreased. In case of heating of inlet, the decreasement of output showed 7.3% at air-fuel ratio 6.5 were compared of in case of non-heating. In case of 0% and 5% of EGR diminished the engine output of 7.3%, 3.9% and 10% of EGR diminished the engine output of 1%.

메타놀 燃料의 機關性能과 排氣가스 組成에 關한 硏究

沈炳珉 三陟大學校 1996 論文集 Vol.29 No.1

The results of this study which is a primitive experiment to use Methanol as alternative fuel and aims for the decrease of exhaust gas emissions, are as follows. The engine power output of methanol fuel is higher than it of M-30(Methanol 30+Gasoline 70) fuel and maximum power is appeared near N=1,400rpm, A/F=6.5 and SA=35°btc. Also, BSFC is more increased than the case of M-30 fuel. The maximum rate of heat release is decreased according to the increasing of engine speed, is appeared near A/F=6.5 and is not changed with Variation of the spark time. The NOx concentrations of methanol fuel is more decreased than it of M-30 fuel and is not affected with engine Speed. HC concentrations of methanol fuel is higher than it of M-30 fuel according to Variation of Spark time and CO concentrations is Lower than the case of M-30 fuel. The max. NOx concentrations of methanol fuel is appeared near air~fuel ratio A/F=7.3 and H.C concentrations is minimum value near A/F=8.5.

태풍 루사와 매미에 의한 학생 수해피해 실태조사

심병민,최세희 삼척대학교 학생생활상담실 2004 學生生活硏究 Vol.10 No.-

불꽃 點火機關의 最適 運轉條件 決定에 關한 硏究

沈炳珉 三陟大學校 1996 論文集 Vol.29 No.1

This study is concerned with the fuel-economy and performance problem, and the purpose of this study control of the operating factors to obtain optimum performance in spark Ignition Engine. This paper discusses the determination of the optium driving conditions. Two objectives, torque condition and brake specific fuel consumption, are considered for optimization. The effects of the three variables(air-fuel ratio, engine speed and spark advance) on the objective function are analyzed by experiments and computer calculation. experimental model and several constraints of actual engine operation are required to obtion the optimum conditions. Gradient projection method is used to find the maximum of multivariable, nonlinear function subject to linear constraints.

메탄올 연료도입에 따른 배기성능의 개선에 관한 연구

沈炳珉,李正閏 三陟大學校 1998 論文集 Vol.31 No.1

The result of this study on engine characteristic and exhaust characteristic in according to the variation of methanol-fuel introduction amounts with the two-systemic injection fuel supply method for exhanst performance improvement without the change of the conventional spark ignition engine are as follows. 1. The mass burned was to the fast combustion in according to increased methanol-fuel introduction amount, finally cycle miximum pressure on the increased. 2. Torque was being increased in according to increased mathanal fuel introduction amount, and this reason was that increase of volumetric efficiency in according to be increased in take air amount. A increasing rate of Torque of high percentage methanol(M-85) fuel is 8 Percent at equivalence ratio Φ=0.9 to Compared with M-O fuel. 3. Brake specific fuel consumption (B SFC) was increased in according to the increase of methanol-fuel intraduction amount, and the reason is that low heating value of methanol-fuel. 4. Nox generation was being decreased at methanol-fuel introduction amount was on the increased. The rate of Nox improvement of M-85 was 16 percent at Φ=0.9, compared with M-O fuel. 5. The generation of C0 was being very decreased in according to increased methanol-fuel introduction amount, and that of HC was being very increased.

전산유체해석을 이용한 엔진윤활시스템 설계

윤정의,심병민,한세범,정연두,박종원,윤성호,김용태,박병완 한국트라이볼로지학회 2005 한국트라이볼로지학회 학술대회 Vol.2005 No.6

Engine lubrication system has very complex oil flow networks. Therefore it is difficult to evaluate and optimize the system only depending on experimental results. When we plan upgrading the engine performance the engine lubrication system must be considered in the plan. In this paper, engine lubrication system design using computational fluid dynamic analysis was studied. To do this, unsteady transient flow network analysis on the engine oil circuit system was carried out. Finally we discussed the design process in the modified engine lubrication system.

공학교육 인증을 위한 메카트로닉스 전공 교육과정의 개발

이정우,정연두,심병민,채경덕,한세범,황영택,Lee Jeong-Woo,Jeong Yeon-Doo,Sim Byoung-Min,Chae Kyung-Duck,Han Seh-Beom,Hwang Yeong-Taik 한국공학교육학회 2005 공학교육연구 Vol.8 No.2

이 논문은 한국공학교육인증원의 공학교육인증 요구조건을 만족시키기 위한 삼척대학교 메카트로닉스 공학전공 교육과정의 연구에 관하여 기술하였다. 국내대학과 외국대학의 메카트로닉스 공학전공의 교육과정을 수집하고 분석하였다. 이 분석결과를 이용하고, 기계공학, 전기공학, 제어공학 그리고 컴퓨터공학의 유기적인 결합을 고려한 교육과정을 제시하였다. 더불어 삼척대학교의 지정학적인 조건과 한국공학교육인증원의 인증요구조건을 반영하였다. 그 결과 학생들에게 분석적인 능력과 실무적인 자질을 개발할 수 있도록 하는 다학제간 교육과정을 개발하였다. This paper describes the development of curriculum for the division of Mechatronics in Samcheok University to meet the requirement of Accreditation Board for Engineering Education of Korea(ABEEK). The curriculum of the department of mechatronics in South Korea and overseas university is analysed and then the curriculum is developed considering the synergistic combination of mechanical engineering, electronic engineering, control engineering and computer engineering. And then the geopolitical condition of university is reflected in the curriculum. ABEEK requirements for major of engineering are also reflected. As a result, interdisciplinary curriculum that provides analytic capability and pragmatic qualification to students is developed.

전산유체해석을 이용한 엔진윤활시스템 설계

윤정의(Jeong-Eui Yun),심병민(Byong-Min Sin),한세범(Seh-Beom Han),정연두(Yeon-Doo Cheong),김동렬(Dong-Youl Kim),채경덕(Kyung-Duck Chae),황영택(Yeong-Taik Hwang),박종원(Jong-Won Park),윤성호(Seong-Ho Yoon),김용태(Yong-Tae Kim),박병완(P 한국트라이볼로지학회 2005 한국윤활학회지(윤활학회지) Vol.21 No.4

Engine lubrication system has very complex oil flow networks. Therefore it is difficult to evaluate and optimize the system only depending on experimental results. When we plan upgrading the engine performance the engine lubrication system must be considered in the plan. In this paper, engine lubrication system design using computational fluid dynamic analysis was studied. To do this, unsteady transient flow network analysis on the engine oil circuit system was carried out. Finally we discussed the design process in the modified engine lubrication system.