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小型 高速 디젤機關의 排氣 排出物에 미치는 排氣 再循環率의 影響에 관한 實驗的 硏究
임재근(J.K. Lim),배명환(M.Wh.Bae),김종일(J.I.Kim) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.2 No.-
The effects of exhaust gas recirculation (EGR) on the characteristics of exhaust emissions and specific fuel consumption have been investigated using an eight-cylinder, four cycle, direct injection diesel engine operating at several loads and speeds. The experiments in this study are conducted on the fixed fuel injection timing of 38 BTDC regardless of experimental conditions. In conclusion, it is found that NOx emission is markedly reduced with the drop of burnt gas temperature at high speeds and loads especially as the EGR rate increases, while the soot particulate rise, with EGR rate and load at a given engine speed, especially high loads. The reduction of exhaust emissions within the Korea heavy duty diesel engine emission standards can be roughly achieved by the optimal EGR rate without degrading the specific fuel consumption, based on the correlations between exhaust emissions.
디젤기관에 있어서 에멀젼 연료가 연소특성에 미치는 영향
임재근(J. K. Lim),조상곤(S. G. Cho),황상진(S. J. Hwang),유동훈(D. H. Yoo),서장원(J. W. Seo) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
A study on the combustion characteristics by using Emulsion Fuel in Diesel Engine is performed experimentally. In this paper, the experiments are performed at engine speed 1800rpm, emulsion fuel ratio is 0%, 10%, 20%, and main measured items are specific fuel consumption, pressure, ratio of pressure rise, rate of heat release etc. The obtained conclusions are as follows. 1) Specific fuel consumption increase maximum 19.8% at low load, but is not effected at full load. 2) Ratio of pressure rise and rate of heat release are about the same in the case of 10% and 20% of emulsion fuel ratio. 3) Cylinder Pressure increase 11.7%, ratio of pressure rise increase 60.4% in case of emulsion fuel ratio 20% at full load. 4) Rate of heat release increase 76.9% in case of emulsion fuel ratio 20% at full load.
디젤기관에서 바이오디젤 연료가 배기배출물 특성에 미치는 영항
임재근(J. K. Lim),조상곤(S. G. Cho),황상진(S. J. Hwang) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
An experimental study is conducted to evaluate and compare the use of Biodiesel Fuel supplements at blend ratio of 10/90(BOF10) and 20/80(BOF20), in four stroke, direct injection diesel engine located at the authors' laboratory. specifically this Biodiesel is produced with soybean oil at the authors' laboratory. The tests are conducted using each of the above fuel blends, with the engine working at a speed of 1800rpm and at a various loads. In each test, specific fuel consumption, exhaust emissions such as nitrogen oxides(NOx), carbon monoxide(CO) and Soot are measured. The results of investigation at various operating conditions are as follows (1) Specific fuel consumption is increased average 0.82%, maximum 1.09% at load 25% in case of BOF10, and average 1.38%, maximum 1.73% at load 25% in case of BOF20. (2) CO emission is decreased average 4.63%, maximum 6.73% at load 0% in case of BOF 10, and average 7.40%, maximum 9.26% at load 0% in case of BOF 20. (3) NOx emission is increased average 2.49%, maximum 3.77% at load 0% in case of BOF10, and average 4.02%, maximum 5.66% at load 0% in case of BOF20. (4) Soot emission is decreased average 7.75%, maximum 10.20% at load 50% in case of BOF10, and average 12.54%, maximum 15.40% at load 50% in case of BOF20.
디젤기관에 있어서 에멀젼 연료가 배기배출물 특성에 미치는 영향
임재근(J. K. Lim),조상곤(S. G. Cho),황상진(S. J. Hwang),유동훈(D. H. Yoo) 한국마린엔지니어링학회 2005 한국마린엔지니어링학회 학술대회 논문집 Vol.2005 No.-
A study on the combustion and exhaust emissions characteristics by using Emulsion Fuel in Diesel Engine is performed experimentally. In this paper, the experiments are performed at engine speed 1800rpm, emulsion fuel ratio is 0%, 5%, 10%, 15%, 20%, 25%, and main measured items are specific fuel consumption, NOx and Soot emissions etc. The obtained conclusions are as follows. 1) Specific fuel consumption increase maximum 19.8% at low load, but is not effected at full load. 2) NOx emissions decrease 30% in case of emulsion fuel ratio 25% at full load. 3) Soot emission decrease 58.9% in case of emulsion fuel ratio 25% at full load.
디젤기관에 있어서 배기온도저하가 성능특성과 배기배출물 특성에 미치는 영향
임재근(J.K.Lim),조상곤(S.G.Cho),황상진(S.J.Hwang) 한국마린엔지니어링학회 2004 한국마린엔지니어링학회 학술대회 논문집 Vol.2004 No.-
A study on the performance and exhaust emissions of diesel engine with reducing exhaust gas temperature is performed experimentally. In this paper, experiments are performed at engine speed 2200rpm, 2600rpm and load 0%, 25%, 50%, 75% and 100% by test engine with F.W. cooler passing through exhaust gas.<br/> Main measured & analyzed parameters are exhaust gas temperature, specific fuel consumption, NOx and soot emissions etc.<br/> The obtained conclusions are as follows.<br/> (1) Specific fuel consumption is the least value at load 75% and it is decreased 1.5% after remodeling F.W. cooler.<br/> (2) NOx emission is the most value at load 100% and it is increased 30.1% after remodeling F.W. cooler.<br/> (3) Soot emission is the most value at load 100% and it is decreased 20.0% after remodeling F.W. cooler.<br/>
Turbulenter를 장착한 디젤기관의 연소 및 배기특성에 관한 실험적 연구
임재근(J. K. Lim),최순열(S. Y. Choi) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.4 No.-
The effects of turbulenter on the characteristics of combustion, exhaust emissions and SFC is experimentally investigated by four-cylinder, four-cycle and direct injection diesel engine operating at several loads and speeds. The investigated results as follows. The combustion pressure in cylinder is slightly increased and ignition timing is not effected by turbulenter. The rate of heat release and accumulated quantity of heat release is slightly increased. SFC is decreased 0.15% of totle average, and NOx emission is decreased by maximum value of average 9.84% at 1200 rpm, and totle average of decreasing rate is 8.03% in the range of experimental conditions. But Soot emission is increased by maximum value of average 9.52% at 1600 rpm, and tot1e average of increasing rate is 3.45%.