• Journal of the korean Society of Automotive Engineers
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• v.26 no.3
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• pp.31-34
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• 2004

국내 소비 에너지의 대부분을 해외에 의존하는 실정에서 2004년 현재 배럴당 $35를 넘는 고유가로 인해 원유수입액이 국가 경제에 큰 부담이 되고 있을 뿐만 아니라, 수송용 연료 사용의 지속적인 증가에 따라, 특히, 인구가 밀집한 도심지의 대기오염도는 우려할만한 상황에 이르렀다. 국내 운행 자동차에 의한 석유 소비량은 전체 석유 소비량 중 30% 정도가 수송연료로 쓰이고 있고, 운행차량 중 약30%가 매연, 아황산가스 배출에 대한 기여도가 높은 디젤차량 이어서, 효율면에서 유리한 디젤엔진의 디젤 연료를 대체할 수 있는 초 청정연료에 대한 관심이 높아지고 있다.

• Journal of Navigation and Port Research
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• v.43 no.6
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• pp.335-343
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• 2019

As the regulations of ship exhaust gas have been strengthened recently, many measures are under consideration to reduce fuel consumption. Among them, research has been performed actively to develop a machine-learning model that predicts fuel consumption by using data collected from ships. However, many studies have not considered the methodology of the main parameter selection for the model or the processing of the collected data sufficiently, and the reckless use of data may cause problems such as multicollinearity between variables. In this study, we propose a method to predict the fuel consumption of the ship by using the principal component analysis to solve these problems. The principal component analysis was performed on the operational data of the 13K TEU container ship and the fuel consumption prediction model was implemented by regression analysis with extracted components. As the R-squared value of the model for the test data was 82.99%, this model would be expected to support the decision-making of operators in the voyage planning and contribute to the monitoring of energy-efficient operation of ships during voyages.

• Journal of Climate Change Research
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• v.5 no.1
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• pp.61-70
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• 2014

The amount of greenhouse gas (GHG) emissions has been increasing steadily over the last 3 years (2009~2011), averaging 5.7 percent a year, due to the growth of low cost carriers and the increased demand for air transportations. The present study attempts to investigate the aviation fuel consumption and GHG emissions of Tier 3a type by the flight phase from three aircraft type such as B737-600(routes between Gimpo-Jeju airport), B737-700(routes between Gimpo-Jeju airport and Inchon-Narita), B737-800(routes between Inchon-Narita) using the Flight Operation Quality Assurance(FOQA) data of the year 2011.

• Korea Petroleum Association Journal
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• no.1 s.131
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• pp.60-66
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• 1992

• Korea Petroleum Association Journal
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• no.5 s.99
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• pp.17-19
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• 1989

• 보일러설비
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• s.70
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• pp.83-84
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• 1999

• Transactions of the Korean Society of Mechanical Engineers B
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• v.39 no.1
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• pp.45-51
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• 2015

In order to meet the enforced emission regulations and reduce fuel consumption, various new technologies are employed in engines. The problem of NOx emissions under a lean mixture condition should be solved, because a lean-burn direct-injection engine can realize stable lean combustion with a stratified mixture, which results in improvements in fuel economy and emissions. This study investigated the effects of intake and exhaust valve timing changes on the performance and emission characteristics of a lean-burn LPG direct-injection engine. Under a partial-load operating condition without throttling, an increase in the intake valve opening led to an increase in NOx emissions due to an increase in the amount of excess air. The fuel consumption deteriorated with an increase in the exhaust valve opening due to a decrease in the expansion work and an increase in the pumping loss.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.38 no.2
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• pp.141-149
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• 2010

This paper contains impulsive maneuver which considers fuel consumption balance of chief satellite and deputy satellite in satellite formation flying. Thrust input is obtained by Lagrange' Multiplier method which is constructed by cost function with weight parameter of each satellite. Energy matching constraint is applied for boundedness of relative orbit, and theoretical solutions are verified by simulation results. Simulations are divided into two scenarios, with or without air-drag effect. This paper's results are expected to be used in real satellite formation flying, when fuel-balancing impulsive maneuver for relative orbit boundedness is needed.

• Korea Petroleum Association Journal
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• no.7 s.41
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• pp.117-120
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• 1984

70년대의 잇따른 유가폭등으로 대폭 떨어지기 시작한 연료유 수요는 총 소비율로써 판단해볼 때 앞으로 더욱 더 떨어질 것으로 전망된다. 세계의 정제업자들은 분해시설을 설치하는 등의 수단을 통해 이에 대한 대책을 강구해왔다. 그러나 시장의 안정상태가 계속될 경우 오는 90년까지 그들은 연료유 생산을 하루 150만배럴 정도 감축해야 할 국면에 처하게 될 것이다. 현재의 계획된 분해시설 능력으로는 금년도 이후에 원유가에 대한 연료유 가격이 떨어지는 현상을 방지하기에는 너무나 미흡하다는 것을 지적하지 않을 수 없다. 이하에서는 미국의 유명한 컨설턴트 회사인 IFC의 석유시장 전문 컨설턴트 Theodore R. Breton씨의 연구 논문을 소개하기로 한다. <편집자주>

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.8
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• pp.1035-1040
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• 2011

In this study, many researches have been carried out against Energy Efficiency Operational Indicator(EEOI) of existing ships under discussion by IMO. This research is examined the method for the polices about IMO's greenhouse gas reducing emissions among them, we were analyzed the EEOI for existing ships. we have analyzed the result about applying EEOI using the calculation method of the rate of fuel consumption for cargo quantities to the actual existing ships and raised the problem. Based on this research, we were presented the improved EEOI about the engine load using fuel consumption and applied the existing ships. As a result, we concluded that the improved EEOI can define a resonable rate of $CO_2$ emissions.