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自動車의 走行모드가 燃料消費率에 미치는 影響에 관한 計算的 硏究
김형수(Houng-Soo Kim),조현철(Hyun-Chul Cho),정균식(Kyun-Sik Jung),박권하(Kweon-Ha Park),최재성(Jae-Sung Choi) 한국자동차공학회 2002 한국자동차공학회 지부 학술대회 논문집 Vol.2002 No.3
The era of high-priced oil has opened its stage as they went through oil crises twice in 1970s. Although the oil price has been stabilized since 1980s consecutive exchange rate increase and rapid increase of the oil price have increased the burden on the consumers who use oil energies. As the amount of CO₂increases as the fossil fuels used for the vehicles are combusted ideally, the ways of reducing the CO₂itself using combustion technology or post-processing technology are not being presented. The only way is to reduce the use of fuels, and for this reason many researches are in progress. Vehicles are used by many drivers who have different driving habits, and the driving modes are also different accordingly. Selecting the driving mode properly and driving in efficient areas can reduce the fuel consumption dramatically. This paper intends to make a calculating program that can calculate the fuel consumption rate in the general driving mode, and using this compare the fuel consumption rates for the fast accelerating mode, the normal mode and the slow accelerating mode, and after the collective examination will present the best driving mode when driving on flat lands.
초저질 유수에멀전연료에 의한 연소와 미립자의 생성·분해특성에 대하여
김형수(Houng Soo Kim) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
Marine fuel oil differs from fuel oils for automobiles and energy-saving plants especially in its properties. As a low-grade fuel oil, it is not only mainly composed of hydrocarbon but also contains a great quantity of sulfur, nitrogen and residual carbon contents. PM components formed by reaction of combustion have not been thoroughly examined. As sea transportation increases, it becomes necessary to grasp the present state of PMs exhausted from vessels as an air-pollutant and it needs to take a research and development to reduce them. Accordingly, relevant organizations including International Maritime Organization (IMO) continue to consider regulations. This study is intended to check a temperature of the flame to raise by burning Marine Diesel Oil(C heavy oil) and Emulsion Fuel oil in a boiler, also measured the concentration of DS and SOF after collecting the PM(Particulate Matters). Especially, SOF are analyzed by using high performance liquid chromatography(HPLC). In this experiment we use additive, itis inorganic matter that cause of non hazardous. That is harmful at any temperature(15℃~100℃) and it make the oil and water not separate. The water emulsion diameter is about 30㎛. The reaction of combustion was promoted by Emulsion and the concentration of the PAHs got low with NO, CO₂, SO₂, DS, SOF.
초저질 유수에멀전연료에 의한 연소와 미립자의 생성 분해 특성에 대하여
김형수(Houng Soo Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
Marine fuel oil differs from fuel oils for automobiles and energy-saving plants especially in its properties. As a low-grade fuel oil, it is not only mainly composed of hydrocarbon but also contains a great quantity of sulfur, nitrogen and residual carbon contents. PM components formed by reaction of combustion have not been thoroughly examined. As sea transportation increases, it becomes necessary to grasp the present state of PMs exhausted from vessels as an air-pollutant and it needs to take a research and development to reduce them. Accordingly, relevant organizations including International Maritime Organization (IMO) continue to consider regulations. This study is intended to check a temperature of the flame to raise by burning Marine Diesel Oil(C heavy oil) and Emulsion Fuel oil in a boiler, also measured the concentration of DS and SOF after collecting the PM(Particulate Matters). Especially, SOF are analyzed by using high performance liquid chromatography(HPLC). In this experiment we use additive, itis inorganic matter that cause of non hazardous. That is harmful at any temperature (15℃ ~ 100℃) and it make the oil and water not separate. The water emulsion diameter is about 30㎛. The reaction of combustion was promoted by Emulsion and the concentration of the PAHs got low with NO, CO₂, SO₂, DS, SOF.
논문 : 실내 모형과 현장 충적층에서 지하투과레이더를 이용한 지하수면 추정
김병우 ( Byung Woo Kim ),김형수 ( Hyoung Soo Kim ),최두형 ( Doo Houng Choi ),고용권 ( Yong Kwon Koh ) 대한지질공학회 2013 지질공학 Vol.23 No.3
지하수면과 불포화대의 수분 포화도가 지하투과레이더(GPR) 신호에 미치는 영향을 연구하기 위하여 실내 토조와 충적층 현장에서 GPR 조사를 수행하였다. 실내의 모래 채움 토조 실험에서, 지하수위를 변화시키기 위해 물을 탱크 바닥에 설치된 밸브를 통해 주입하고 배수시켰다. 지하수위와 수분포화도를 추정하기 위하여 모래 채움 토조에서 GPR 수직반사법(이후, VRP) 자료가 획득되었다. 실내 모래 채움 토조에서 획득한 GPR 신호는, 지하수위는 물론 함수율 변화에도 민감하게 반응함을 보여준다. 불포화대에서 GPR 속도는 함수율 변화에 따라 크게 조절되며, 주시 시간의 증가는 포화도의 증가로 해석된다. 함안군 이룡리 낙동강변 충적층에서 220m에 달하는 VRP 조사가, 지하수위를 추정하기 위하여 수행되었다. 현장 조사 결과, 포화 조건에서 GPR 신호의 첫 번째 반사면은 모관 상승에 의한 경계부를 지시하며, 실제 지하수면과는 차이가 있음을 지시한다. 보다 정확한 지하수위를 추정하기 위하여, Well-3호공 주변에서 중앙공심점(common mid-point, 이후, CMP) 방식 GPR 조사를 수행하였다. 그 결과, 모관 상승 경계부와 지하수면 속도를 구하였고, 이는 보다 상세한 지하수면과 심도별 포화도 정보를 제공하였다. 지하수면과 포화도 정보를 포함하는 GPR 조사 결과는 통기대의 현장 수리 지질학적 특성 조사에 유용한 수단이다. Ground penetrating radar (GPR) surveys were conducted in a sand tank model in a laboratory and at an alluvial field site to detect the groundwater table and to investigate the influence of saturation on GPR response in the unsaturated zone. In the sand tank model, the groundwater table and saturation in the sand layer were altered by injecting water, which was then drained by a valve inserted into the bottom of the tank. GPR vertical reflection profile (VRP) data were obtained in the sand tank model for rising and lowering of the groundwater table to estimate the groundwater table and saturation, Results of the lab-scale model provide informatiou on the sensitivity of GPR signals to changes in the water content and in the groundwater table. GPR wave velocities in the vadose zone are controlled mainly by variations in water content (increased travel time is interpreted as an increase in saturation), At the field site. VRP data were collected to a depth of 220 m to estimate the groundwater table at an alluvial site near the Nakdong river at Iryoug-ri. Haman-gun, South Korea. Results of the field survey indicate that nuder saturated conditions, the first reflector of the GPR is indicative of the capillary fringe and not the actual groundwater table. To measre the groundwater table more accurately. we performed a GPR survey using the common mid-point (CMP) method in the vicinity of well-3, and Sunk a well to check the groundwater table. The resultant CMP data revealed reflective events from the capillary fringe and groundwater table showing hyperbolic patterns. The normal moveont correction was applied to evaluate the velocity of the GPR, which improved the accuracy of saturation and groundwater table information at depth. The GPR results show that the saturation information, including the groundwater table. is useful in assessing the hydrogeologic properties of the vadose zone in the field.