http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
분말형 집광기에 의한 태양열 스털링엔진 발전시스템의 성능예측
배명환(Myung-\han BAE),강상율(Sang-Rul Kang),장형성(Hyung-Sung Chang) 한국자동차공학회 2002 한국자동차공학회 지부 학술대회 논문집 Vol.2002 No.3
A concentrator projection area must be increased to raise the output level of a solar power system. In such a case, stretched-membrane concentrators are sometimes used instead of ones made by monolithic construction. The simulation analyses of a solar power system with stretched-membrane concentrators, which consist of sixteen mirror elements divided into two along the radial direction and eight along the circumferential direction, by using a stirling engine are carried out to predict the system performance in this study. In addition, influences of mean pressure on mechanical efficiency and load factor on the efficiency of engine/generator subsystem are discussed in simulation. It is<br/> found that the efficiency of stretched-membrane concentrators is lower than one of monolithic type, especially affected strongly by the smaller slope error, and the collector efficiency decreases as the direct solar radiation is small.<br/>
디젤기관의 플라즈마 EGR 조합시스템에 의한 배기 배출물 저감 특성
배명환(Myung-\han Bae),김호갑(Ho-gab Kim),김정민(Jung-min Kim),정화(Hwa-Jung),이동윤(Dong-yoon Lee),옥현진(Hyun-jin Ok) 한국자동차공학회 2003 한국자동차공학회 지부 학술대회 논문집 Vol.2003 No.5
The effects of non-thermal plasma reactor and recirculated exhaust gas on performance and exhaust emissions under four kinds of engine loads were experimentally investigated by using a four-cycle, four-cylinder, swirl chamber type, water-cooled diesel engine with a combined plasma EGR system operating at three kinds of engine speeds. The purpose of this study is to develop the combined exhaust gas recirculation(EGR) control system with a non-thermal plasma reactor for reducing NO, and soot emissions simultaneously in diesel engines. The EGR system is used to reduce NO, emissions, and the non-thermal plasma reactor is used to reduce soot emissions. The plasma system in this study is a flat-to-flat type reactor operated by a plasma power supply.<br/> The experiments are performed at the fixed fuel injection timing of 4 ATDC regardless of experimental conditions. It is found that NO, and soot emissions are decreased, especially soot<br/> emissions are markedly reduced at the middle loads, as the applied electrical voltage of plasma<br/> reactor is elevated.<br/>
디젤기관 대체연료 미강유의 분사율 및 배기 배출물 특성
배명환(Myung-whan Bae),이봉섭(Bongsub Lee),임기창(Kichang Im),옥현진(Hyun-jin Ok),김인덕(In-deok Kim),한영욱(Young-wook Han),Syaiful,B. W. Riayndwita 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
In order to investigate the effect of heated temperature on fuel injection rate for fuels such as light oil, blend of rice bran oil and light oil, and pure rice bran oil as a parameter of injection pump rack stroke, tests are performed by an injection pump tester at three kinds of cam shaft speed. In this study, also, the effects of rice bran oil properties on the fuel economy and exhaust emissions are experimentally examined by a single cylinder, four cycle, direct injection, water-cooled diesel engine operating at several engine loads and speeds. The fuel injection timing is fixed to 22° BTDC regardless of fuel types, engine loads and speeds. The kinematic viscosity of rice bran oil is very high compared with light oil. Also, the oxygen is not contained at all in light oil, while the oxygen contents of 10.7% are included in rice bran oil. In this study, results show that fuel injection rate increases as injection pump rack stroke and cam shaft speed are elevated at the same conditions, and as heated temperature is elevated with the exception of light oil. It is also found that brake specific fuel consumption rate and NOx emissions increase, while soot emissions decrease as the blending rate of rice bran oil is enriched. Thus we can conclude that the combustion process which affect the fuel economy and exhaust emissions of diesel engines using rice bran oil as a fuel is controlled by the differences of chemical and physical properties.
대형 2행정 디젤기관에 있어서 실린더 주유기용 전자제어 퀼 축압분배기 개발
정화(Hwa Jung),배명환(Myung-whan Bae),김인덕(In-deok Kim),임기창(Ki-chang Im),한영욱(Young-wook Han),Syaiful,Byan Wahyu Riyandwita 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
Minimizing the cylinder wear and the consumption rate of cylinder oil in a large two-stroke diesel engine is of great economic importance. A motor-driven cylinder lubricator for Sulzer RT-flex large two-stroke diesel engines developed by authors is in need of mounting a quill system to lubricate cylinder parts for smoother operation. In order to apply the common-rail lubricating system to the developed cylinder lubricator as the second research stage, the quill system with a progressively quantitative distributor is improved in the electronically controlled quill system with an accumulated distributor. In this study, the effects of lubricator motor speed, plunger stroke and cylinder back pressure on oil feed rate, maximum discharge and delivery pressures are experimentally investigated by using the electronically controlled quill system with an accumulated distributor in the developed cylinder lubricator. It is found that the oil feed rate of the electronically controlled quill system with an accumulated distributor is larger than that of the quill system with a progressively quantitative distributor because of the increase of delivery speed and volume by changing the location of accumulator in the same experimental condition.
이동제(Dong-Je Lee),김형만(Hyung-Man Kim),이동호(Dong-Ho Lee),홍기호(Ki-Ho Hong),배명환(Myung-\han Bae) 한국자동차공학회 2002 한국자동차공학회 지부 학술대회 논문집 Vol.2002 No.3
In the present study, surface temperature measurement of the cylinder head was done in a diesel Engine by K-type and E-type thermocouples. The thermocouples are welded on the surface of the cylinder head to measure the surface temperature, and drawn out through the hole of safety valve. A connector is designed and manufactured in the hole of safety valve, and Ceramic bond was used to prevent the leakage of combustion gas. Surface temperature distribution of the cylinder head have been measured with various engine torque. The results show that the surface temperature of exhaust valve side is much higher than other parts.<br/>