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연료물성에 따른 경유 차량의 성능 및 에너지소비효율 연구
노경하(Kyeong-Ha Noh),이민호(Min-Ho Lee),김기호(Ki-Ho Kim),이정민(Jung-Min Lee) 한국유화학회 2018 한국응용과학기술학회지 Vol.35 No.3
점차 강화되는 배출가스 규제와 적은 연료로 많은 거리를 주행할 수 있는 고효율 자동차에 대한 요구로 에너지소비효율에 대한 관심이 점차 늘어나고 있다. 국내의 에너지소비효율은 도심주행모드와 고속 도로 모드를 주행하여 복합연비로 산정하고 5-Cycle 보정식을 이용하여 최종 에너지소비효율을 표시하고 있다. 에너지소비효율의 경우 카본발란스법에 의하여 산출되는데 이때 배출가스에 의해 계산이 됨에 따라 연소에 사용되는 연료는 자동차 성능과 에너지소비효율에 매우 중요한 역할을 하게 된다. 자동차 연료의 경우 국내에서는 석유 및 석유대체연료 사업법 품질기준에 따라 국내에 유통되고 있는데 정유사의 정제 방법이나 원유에 따라 품질 기준 내에서 물성 차이를 보일 수 있다. 일정 품질기준을 정하고 있음에 따라 연료별 큰 차이는 나지 않을 것으로 보이나 자동차의 성능에는 영향을 미칠 수 있어 그에 따른 연구가 필요한 실정이다. 따라서, 본 연구에서는 시중에서 유통되고 있는 연료 중 여름철에 판매되는 경유를 정유사 직영점을 통해 구매하였으며, 각 시료별 물성을 분석하고 그에 따른 에너지소비효율을 측정하였다. 에너지소 비효율의 경우 현행 경유 자동차의 에너지소비효율 산정식과 휘발유 에너지소비효율에서 사용되는 산출식을 이용하여 물성 적용에 따른 변화를 살펴보았다. 그 결과 시료별 밀도는 최대 약 0.9%의 차이를 보였으 며, 순발열량은 1.6%의 차이를 보였으며, 현행 에너지소비효율 산출 결과에서는 도심모드에서 약 1%, 고속모드에서 1.4% 차이를 보였다. 휘발유 산출식을 이용한 산출에서는 현행 에너지소비효율 산출때 보다약 6%정도 낮은 수치를 보였으며, 각 시료별 에너지소비효율은 최대 도심과 고속에서 최대 약 1.4%의 차이를 보였다. Increasing emissions regulations and demand of high-efficiency cars that travels a lot of distance with less fuel, there is growing interest in Energy Consumption Efficiency. Korean energy consumption efficiency compute combined Fuel Economy by driven city & highway driving mode and present final Energy Consumption Efficiency as using 5-cycle correction formula. Energy consumption efficiency is computed Carbon-balance-method, when used burning fuel play a key role in vehicle performance & Energy Consumption Efficiency. In Korea, vehicle fuel is circulate by Petroleum and Petroleum Alternative Business Act, there is property difference in quality standard because petroleum sector’s refine method or type of crude oil. It does not appear a big difference according to fuel, because it sets steady quality standard, it may affect the performance of automobile. Thus, in research We purchase a few diesel fuel which circulated in the market in summer season though directly-managed-gas station by petroleum sector, resolve property each of fuel, we compute Fuel Economy each of them. We analyze into change depend on applying for property as nowadays utilizing Energy Consumption Efficiency calculating formula of gasoline and diesel fuel. As result, Density each of sample fuel has a maximum difference roughly 0.9%, net heat value each of sample fuel has difference 1.6%, result of current Energy Consumption Efficiency each of sample fuel has a difference roughly 1% at city drive mode, 1.4% at highway drive mode. Result of use gasoline calculator formula shows less 6% result than nowadays utilizing Energy Consumption Efficiency calculating formula, each of sample‘s Energy Consumption Efficiency shows maximum roughly 1.4% result in city & highway drive mode.
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옥탄가에 따른 차량 및 엔진 연소특성에 관한 실험적 연구
노경하(Kyeong-ha Noh),김정환(Jung-hwan Kim ),이민호(Min-ho Lee ),김기호(Ki-ho Kim) 한국자동차공학회 2017 한국자동차공학회 지부 학술대회 논문집 Vol.2017 No.6
In this study, to investigate the combustion characteristics and the effect on the performance of the engine according to the octane number, two fuels with different octane number were selected and combustion characteristics, exhaust gas, fuel efficiency and acceleration experiment were performed. First of all, a single-cylinder engine was used for the combustion characteristics experiment, and two fuels with different octane number among the fuels on the market were selected. In the single cylinder experiment, combustion characteristics were observed when the ignition timing was gradually advanced through the appropriate ignition and air fuel ratio control for each fuel. The combustion correlation by the octane number was observed though the output, exhaust gas combustion pressure of the single cylinder experiment. In addition, we compared the change of fuel efficiency with the difference of octane number through the actual vehicle and examined the influence of octane value on the high performance demand interval through the acceleration experiment. As a result, as the ignition timing was advanced, the fuel of high octane number showed stable combustion characteristics, and the acceleration and output experiment showed a slight improvement. However, as both fuels did not show much difference in the current fuel efficiency mode in the city center and highway, the effect of high octane fuel on the fuel efficiency was found to be insignificant in the current driving condition of the vehicle on the market.
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이민호(Min-Ho Lee),박진성(Jin-sung Park),노경하(Kyeong-Ha Noh),김종렬(Jong-Ryeol Kim) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
As the interest on the air pollution is gradually rises at home and abroad, fuel and engine, boiler researchers have been working on the exhaust and greenhouse gas emission reduction from engine and boiler through a lot of approaches, which consist of new device design, innovative after-treatment systems (Scrubber, SCR, DPF et al.), using clean (eco-friendly alternative) fuels and fuel quality improvement. This research has brought forward two main issues : exhaust emissions (regulated and non-regulated emissions, PM particle matter, SO<SUB>x</SUB>) and greenhouse gases of engine and boiler. Exhaust emissions and greenhouse gases of engine and boiler had many problem that cause of ambient pollution, health effects. In order to reduce these emissions, new regulations have been created and applied in each countries. In this study, the characteristics of exhaust gas emitted when bio-fuel oil is used in marine engines and industrial boilers was studied. Compared to heavy oil, bio-fuel oil has been shown to have excellent environmental improvement effects such as reducing sulfur oxides, nitrogen oxides, fine dust and greenhouse gases in the exhaust gas. As a result of this, there is a need to review bio-fuel oil as a marine and industrial alternative fuel in order to cope with the regulation of sulfur content and reduction of greenhouse gases.
ScienceON
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