• 농업기술회보
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• v.46 no.6
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• pp.20-21
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• 2009

대체에너지 바이오연료 "유채" 최근 온실가스의 대량배출로 인한 지국온난화 문제해결과 더불어 고유가 시대의 대체에너지로 부상하고 있는 바이오연료(바이오디젤를 생산할 수 있는 유채에 대한 관심이 높아지고 있다. 유채는 동계작물로 종자의 약 40~45%가 기름성분이며, 지방산 중 올레인산이 많이 함유되어 바이오디젤 생산에 적합한 식물로 겨울철 유휴농지를 활용하여 재배하면 농가소득과 더불어 농촌경제 및 관련 산업의 활성화에도 도움이 될 것이다. 유채는 파종시기와 방법 및 파종 후 관리여부에 따라 생산량의 차이가 심하므로 생산량의 증대를 위해서는 파종시기의 재배법을 잘 숙지하여 재배한다.

• Proceedings of the KIEE Conference
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• 2004.10a
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• pp.210-212
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• 2004

일반적으로 비상시 전원으로 디젤 발전기를 가장 많이 사용하고 있으며, 하이브리드 전원소스(상용 전원, 축전지, 연료전지, 태양전지등)를 사용하여 부하에 안정적인 전력을 공급하기 위한 방안들이 연구되어지고 있다. 최근 비상시 전원으로 가장 많이 사용하고 있는 디젤발전기의 역할이 아주 중요하게 여겨지며, 운영부하에 따라서도 유연하게 동작되어야 하며, 신뢰성도 확보되어야 한다. 따라서 본 연구에서 부하 변동에 따른 최대전력 추종제어 기능이 가능하고, 고조파 억제 기능 및 안정주파수 유지기능이 가능하도록 부하 변동에 따른 디젤발전기의 제어기에 대하여 논하고자 한다.

• Transactions of the Korean Society of Automotive Engineers
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• v.8 no.4
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• pp.59-67
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• 2000

Recently the world is faced with the very serious problems related to the increasing use of the conventional petroleum fuels. THe air pollutions in big cities were also occurred by the exhaust emissions from automobiles. many researchers have been attracted various oxygenated fuels as an alternative fuel and a renewable fuel for the measure of these problems. In this study the effect of oxygen in fuel on the exhaust gas emissions has been investigated with oxygenated fuels as an alternative fuel for diesel engine. The exhaust gas emission were investigated by comparing with that of the diesel fuel. The vegetable fuel oil such as soybean oil gives lower smoke level than that with diesel fuel. Furthermore the smoke emission is more affected by the oxygen content in fuel than by the fuel viscosity. This study concluded that the fuels including oxygen might be a good measure to reduce smoke in diesel engine because the oxygen strongly influenced the combustion process.

• Journal of the Korean Institute of Gas
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• v.11 no.1 s.34
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• pp.9-12
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• 2007

In this study, a new method of combustion characteristics have been proposed to reduce exhaust emissions in a diesel engine using four kinds of mixed fuel. Mixed fuels show four different torque ratios between diesel oil md natural gas, which are 4:0, 3:1, 2:2 and 1:3. In order to investigate the exhaust gas during combustion, exhaust gases are sampled by gas analyzer, for example NOx, Soot, CO, and HC, as the RPM changed. As a result, the NOx, CO, and HC concentrations of mixed fuel are higher than those of diesel oil only. However, the Soot concentration of mixed fuel is lower when diesel oil is burned.

• KSBB Journal
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• v.25 no.2
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• pp.109-115
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• 2010

The demand of biodiesel that is a renewable, alternative fuel for fossil-based petrodiesel seems to keep increasing. Exploiting lipids of microalgae as a raw material for biodiesel is already technically feasible. To realize economical production of microalgal biodiesel, several factors or strategies should be addressed and improved. Especially, researches on improvement of lipid synthesis by genetic or metabolic engineering are now in early stage, and prospects of this field are bright, requiring concerns and interests of many researchers to put practical use of microalgal biodiesel forward.

• Fire Science and Engineering
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• v.23 no.4
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• pp.19-24
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• 2009

As the environmental pollution by the drastic increase of vehicles becomes one of the social major concerns, the method of reducing the harmful exhaust emission is being the subject of interest. Utilization of waste edible oil as a raw material for biodiesel production is helpful not only for the stable supply of raw materials but also costing down the biodiesel price. This study was conducted to examine the combustion and thermal characteristics with mixing ratio of biodiesel fuel. Flash points, fire points and autoignition temperature (AIT) were measured by using Tag closed cup, Cleveland open cup flash point tester and AIT apparatus. As the result, flash points, fire points and AIT increased with percentage of more contained biodiesel.

• Journal of Energy Engineering
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• v.18 no.2
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• pp.132-135
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• 2009

Development of biofuels like ethanol and biodiesel for commercial uses is a recent phenomenon. However, the growth of ethanol and biodiesel has been impressive during the period 2000-2007yr. Globally, production of biodiesel stands around 8.3 billion liters. Europe leads the world in biodiesel production with 80% share of the global biodiesel production total. Today biodiesel fuels have been in commercial use in many countries and recently the world-wide biodiesel market has experienced considerable growth, which is partly due to various tax concession programs and other financial incentives. In Korea, biodiesel has already been used for transportation fuel, but not used for power generation fuel yet. Korean government has a strategy for renewable energy propagation, especially the goal of power generation amount by renewable energy is 3% of total power production by 2012. This paper focuses on the estimation study for effect of using biodiesel as power generation fuel. The study also has the plan to replace the fuel of thermal power plant, gas turbine and distributed power generation system. As the increase of biodiesel fuel, I look forward to environment-friendly power generation and the strategy of Renewable Portfolio Standards(RPS).

• 기계와재료
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• v.12 no.2 s.44
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• pp.40-47
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• 2000

• Proceedings of the KSME Conference
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• 2005.11a
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• pp.15.2-15.2
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• 2005

• Transactions of the Korean Society of Automotive Engineers
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• v.19 no.4
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• pp.130-136
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• 2011

This study describes the effect of EGR rate on the combustion and emissions characteristics of a four cylinder CRDI diesel engine using biodiesel (soybean oil) blended diesel fuel. The test fuel is composed of 30% biodiesel and 70% ULSD (ultra low sulfur diesel) by volumetric ratio. The experiment of engine emissions and performance characteristics were performed under the various EGR rates. The experimental results showed that ignition delay was extended, the maximum combustion pressure and heat release gradually were decreased with increasing EGR rate. Comparing biodiesel blended fuel to ULSD, the injection quantity of biodiesel blended fuel was further increased than ULSD. The emission results showed that $NO_x$ emission of biodiesel blended fuel becomes higher according to the increase of EGR rate. However, in the case of biodiesel blended fuel, HC, CO and soot emissions were decreased compared to ULSD.