• 한국추진공학회지
• /
• 제13권3호
• /
• pp.34-40
• /
• 2009

카본슬러리 연료 제조 시 카본의 분산안정성에 미치는 공정변수의 영향을 조사하였다. 카본슬러리연료의 분산안정성은 위치별 입도분석, 카본함량 분석, 그리고 원심분리 후 분산상태 관찰을 통해서 측정하였다. 여러 종류의 첨가제를 적용한 결과, NB463S84 사용시 분산성과 분산안정성이 가장 우수한 것을 알 수 있었다. NB463S84와 비슷한 작용기를 가지는 PIBSI를 합성하였으며, 이를 카본슬러리 연료에 적용하여 유사한 분산안정도를 얻었다. 끝으로 g 규모에서 얻은 제조 조건을 kg 규모 제조에 적용하여 카본슬러리 연료의 실용화 가능성을 확인하였다.

• 한국응용과학기술학회지
• /
• 제28권4호
• /
• pp.455-463
• /
• 2011

The average sulfur content of crude oil is 2.2%. Coal is about 0.3 to 4.0 percent of the sulfur gases or particles being discharged into the atmosphere through the chimney as 1 to 2% $SO_3$(Sulfur trioxide) and about 95% of the $SO_2$ is reported. $SO_3$ gas, which has many different causes of, as the combustion of sulfur containing fuel during the air due to the excess $SO_2$ gas is oxidized to $SO_3$ gas. Sulfur trioxide emitted from high sulfur heavy oil fired boiler caused white plume in stack and high temperature and cold end corrosion of facilities. So, in order to control sulfur trioxide concentration of Fuel gas in boiler, various of additives are used in other foreign. They are injected to Fuel Oil and consumed in boiler and reduce ash and the conversion rate of sulfur trioxide. In domestic, MgO compounds are used as additives but the total volume of them are made from other foreign company. In this study, MgO compounds were developed with liquid MgO compounds and field application was accomplished. The effect of newly developed chemicals and process were nearly equal to foreign products. In Consequent, the chemicals and process produced by newly developed technology can be substituted for foreign products and reduce the cost of plant operation.

• Tribology and Lubricants
• /
• 제28권4호
• /
• pp.178-183
• /
• 2012

The fuel system of a vehicle is a very important compotent, as it provides the firing resources to the combustion chamber of the engine. However, improper operation of the system can generate bad condition or start-off during engine revolution. This study analyzed several examples of failure that had originated in the field. In the first example, the driver operated a vehicle containing both gasoline and LPG in the fuel tank, but the gasoline fuel remained unused for a few months. Therefore the fuel pump was clogged because of gasoline congelation. The second example, dealt with fuel leakage that occurred from the slightly torn O-ring connecting the fuel lines. The third example, pertained to engine damage and power-down owing to the usage of proor-quality fuel and ingredient. Therefore, it is necessary to take adequate measures to prevent the failure of the fuel system of vehicle.

• 유기물자원화
• /
• 제27권4호
• /
• pp.83-90
• /
• 2019

본 연구에서는 중유회의 고형연료로써 활용 가능성을 평가하기 위해 첨가제별 성형 특성과 조성을 분석하고, 제조한 SRF(Solid Refuse Fuel)의 발열량을 비교하였다. SRF 성형을 위해 함께 첨가한 첨가제는 귤박, 폐목재, 석탄이었으며, 함수율 30%를 기준으로 각각의 첨가제를 혼합하여 압출방법을 통해 펠렛 형태로 제조하였다. 실험결과, SRF의 성형성은 중유회와 석탄 또는 귤박을 혼합한 조건에서 우수하였으며, 발열량은 석탄을 혼합한 SRF가 4,274 kcal/kg 으로 가장 높았다. 따라서 중유회를 활용한 고형연료의 합성 조건은 20 wt%의 석탄을 혼합하여 함수율 30%로 제어하였을 때, 높은 성형성과 발열량의 향상을 나타내는 것을 확인하였다. 이 결과로부터 J 화력발전소의 중유회를 활용하여 첨가제(귤박, 폐목재, 석탄)를 일정 비율로 주입하였을 때 고형연료의 제조 가능성을 확인할 수 있었다.

• 한국윤활학회:학술대회논문집
• /
• 한국윤활학회 2002년도 the technical trends in the world automobile and lubricant market
• /
• pp.21-24
• /
• 2002

There is a trend with driveline lubricants toward improved thermal stability, vehicle component durability and fuel efficiency. These improvements can significantly reduce vehicle operating costs and improve customer satisfaction. Of these improvements, the fuel efficiency is getting a substantial attention due to recent focus on $CO_2$ emission control in Europe, Japan and $CAF{\'{E}}$ requirement in U.S.A. Lower viscosity axle oils and transmission fluids are currently being evaluated as potential solutions since these lubricants tend to reduce the churning losses and can improve the fuel efficiency. However, these lubricants should provide adequate gear and bearing protection, while increasing the overall efficiency of the driveline components. In this paper, the development of new fuel efficient axle was discussed with the focus on the effect of base oils, additives, and viscosity modifiers on the fuel efficiency of driveline components.

• 한국정밀공학회지
• /
• 제18권6호
• /
• pp.121-126
• /
• 2001

Currently, potentiometric method has been employed to measure fuel amount for automobile. However, potentiometer could be malfunctioned or damaged due to the additives or dirt in fuel because a variable electric resistor is immersed in fuel. Therefore, a device employing strain sensor is designed and tested to verify the possibility as an alternative of the conventional fuel sender. Existing fuel tank has irregular cross section. Therefore, buoyancy is not increased linearly as fuel amount is increased. We design a floater that can compensate the irregular cross section of fuel tank and make buoyancy to increase linearly with increasing fuel amount. New fuel sender, comprising of strain gages on circular membrane, the above commented floater and the cover to prevent the disturbance due to sudden acceleration and deceleration, is designed and tested to replace current fuel sender. On the other hand, we are developing strain sensor that has strain gage deposited directly on the circular membrane with cantilever beam.

• 한국추진공학회:학술대회논문집
• /
• 한국추진공학회 2011년도 제37회 추계학술대회논문집
• /
• pp.702-704
• /
• 2011

대표적인 낮은 성능의 액체 연료(Jet A-1)에 고밀도 고에너지특성을 갖는 첨가제를 혼합하였을 때 연료의 물성 미치는 영향을 조사하였다. 액체 연료의 주요 인자인 밀도, 점도, 발열량을 중심으로 첨가제혼합에 따른 혼합연료의 물성을 비교 분석하여, 액체 연료(Jet A-1)의 성능향상과 같은 특성변화의 가능성이 있음을 파악하였다.

• 한국안전학회지
• /
• 제23권6호
• /
• pp.95-99
• /
• 2008

Halon was known as a cause of the ozone layer destruction. In 1987, it was designated as one of the ozone-layer-destroying materials in the Montreal Protocol. Therefore substitutes of Halon agent has been developed including inert gas extinguish system, which is one of the most widely used fire extinguishing system. This study intended to increase the efficiency of inert gas extinguishing agent by using inert gas additives. As IG-541 shows high extinguishing power, the experiment was performed to measure the effects of gaseous additives to it. Cup-burner fire extinguishing apparatus was used with n-Heptane fuel. Among many of pure inert gaseous agents, Helium showed the most excellent extinguishing power. When Helium was added to IG-541, fire extinguishing power was increased and the concentration of oxygen in chimney also risen. By adding Helium to IG-541, the effectiveness of inert gas fire extinguishing system is able to be increased.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2023년도 가을학술발표대회논문집
• /
• pp.115-116
• /
• 2023

In this study, it was confirmed whether kaolin can play a role as a bed materials and a role in reducing clinkers by using kaolin with a bed materials for the purpose of removing clinkers such as slagging and fouling generated in circulating fluidized bed combustion furnaces using solid fuel.

• 한국펄프종이공학회:학술대회논문집
• /
• 한국펄프종이공학회 2007년도 제32회 펄프종이기술 국제세미나
• /
• pp.19-32
• /
• 2007

A new generation of fiber-based papermaking chemicals were presented for the first time at the PTS Pulp Technology Symposium 2005, and then several articles were published in various magazine in Asia ("Paper Asia"), the US ("Pulp & Paper"), and Europe ("Wochenblatt fuel Papierfabrikation"). The information generated quite an interest in the paper industry. Extensive studies of these papermaking additives have been made recently, new information obtained, and the compounds have gained more recognition in the industry. The company J. Rettenmaier und Soehne developed of a group of fiber-based papermaking additives. They includ combination of fibers with sizing agents, starch, fluorochemicals, minerals, biocides and some others. This article presents in-depth study of the AKD modified micronized cellulose as an example of the fiber-based papermaking chemicals cocept. The material of the present paper is based mostly on the results of the pilot paper machine study at the Paper Research Institute PTS (Heidenau, Germany), and includes case studies from the mills, which used $ARBOCELPLUS^{(R)}-AKD$ compounds. It should be noted that the $ARBOCELPLUS^{(R)}$ compounds were not designed to replace traditional additives in paper industry. They should rather be used in those areas, where application of "normal" chemicals is especially problematic.