• Journal of Advanced Marine Engineering and Technology
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• v.36 no.4
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• pp.484-489
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• 2012

The objective of this work presented here was focused on analysis of particulate matter and nitrogen oxide characteristics in ESC test mode from heavy-duty diesel engine installed on-road vehicles applicable to prime propulsion engine for marine vessels. The authors confirmed that a large quantity particulate matter were emitted in high power density condition, nitrogen oxide characteristics were dependent on exhaust gas temperature. Particulate matters were reduced by 1/100~1/1,000 times in post DPF with test modes but filtration efficiency was decreased in the engine power fluctuation. In the case of the high speed and power condition, the exhaust level of particulate matters was increased according to increment of temperature of gas flowing into DPF. The orders of magnitude for particle concentration levels from the analysis of size distribution of particulate matters of test engine was different. Both emitting nano-sized particles below 100nm regardless of DPF and non-DPF.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2011.10a
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• pp.44-44
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• 2011

디젤 엔진 배기가스 중의 황산화물(SOx)은 산성비의 원인이 될 뿐 아니라 인체에 대해서도 상당히 치명적인 위험을 초래하는 성분으로 지금까지는 다른 오염물질인 질소산화물 (NOx), 입자상 물질(particulate matter) 등에 비해서 상대적으로 덜 주목을 받아왔다. 국제적인 황산화물 배출규제의 경우, '황산화물 배출규제지역' (SECA : SOx Emission Control Area)에 대해 엄격한 배출규제가 시행되고 있는데, 대부분 황함량을 1.5%이하의 연료를 사용하거나, 후처리 설비를 설치해서 배기가스 중의 황산화물을 6.0g/kWh 이하로 유지하도록 규정하고 있다. 따라서 본 연구에서는 강화되고 있는 디젤엔진 배기가스 중의 황산화물과 입자상 물질을 저감하기 위한 설비로서, 높은 경제성 및 신뢰성 등의 장점으로 인해 선정 가능성이 가장 높은 스크러버 시스템에 대해 독자모델 설계를 수행하였으며 파일롯 설비를 활용한 실제 디젤엔진에 대한 실험을 통하여 운전조건에 따른 제거효율, 발생되는 처리수의 성분, 그리고 디젤엔진 운전에 영향을 미치는 압력손실 등에 대한 데이터를 확보함으로써 실제 선박적용에 대한 가능성을 확인하였다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1997.04a
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• pp.141-144
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• 1997

• Transactions of the Korean Society of Automotive Engineers
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• v.3 no.6
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• pp.41-54
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• 1995

A mathematical model for wall-flow monolith ceramic diesel particulate filter was developed in order to describe the processes which take place in the filter during regeneration. The major output of the model comprises ceramic wall temperature and regeneration time(soot reduction). Various numerical tests were performed to demonstrate how the gas oxygen concentration, flow rate and the initial particulate trap loading affect the regeneration time and peak trap temperature. The model is shown to b in reasonable agreement with the published experimental results. This model can be applied to predict the thermal shock failure due to high temperature during combustion regeneration process.

• Journal of the korean Society of Automotive Engineers
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• v.22 no.4
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• pp.44-46
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• 2000

• Air Cleaning Technology
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• v.16 no.2 s.61
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• pp.29-36
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• 2003

• 기계와재료
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• v.12 no.4 s.46
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• pp.97-103
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• 2000

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.7
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• pp.974-981
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• 2019

Fine dust has become a significant social problem. Diesel engines are used as the main propulsion power source in ships. This study introduces a diesel particulate filter (DPF) that is used as an exhaust after-treatment system for diesel engines to reduce particulate matter known as diesel fine dust. Two materials are used for the DPF: Cordierite and silicon carbide (SiC). In this study, to improve the physical properties of the binder used in the SiC DPF, cordialite was used instead of the SiC-based materials used as the conventional binder to evaluate the thermal durability against high-temperature deformation through the change of the coefficient of thermal expansion. In addition, the physical properties of the silica sol, as a main component of the base coating solution for determining the bond between the binder and the segment, were confirmed. Based on this, the change effect of the binder physical properties was confirmed through experiments by either adding a silane coupling agent or SiC to increase the reactivity of the silica sol.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2002.11a
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• pp.39-44
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• 2002

배기가스의 규제가 전 세계적으로 강화되고 있는 가운데, 경유사용 디젤기관은 가솔린기관 보다 열효율이 높고 온실가스인 $CO_2$ 배출량이 적은 장점이 있으나, PM(입자상 물질)과 NO$_{x}$가 다량 배출되는 단점이 있다. 이들의 저감책으로서, 엔진개량, 연료분사장치의 고압화와 전자제어화, 배기 후처리기술의 적용 등 디젤기관의 고효율성을 손상시키지 않으면서, 배기공해를 대폭 저감하려는 연구가 활발히 추진되고 있으며, 한편으로는 디젤기관의 대체연료에 대한 연구가 활발히 추진되고 있다.(중략)

• Transactions of the Korean Society of Mechanical Engineers B
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• v.35 no.6
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• pp.577-583
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• 2011

To meet the requirements of the Tier 4 interim regulations for off-road vehicles, emissions of particulate matter (PM) and nitrogen oxides (NOx) must be reduced by 95% and 30%, respectively, compared to current regulations. In this research, both the DPF and HPL EGR systems were investigated, with the aim of decreasing the PM and NOx emissions of a 56-kW off-road vehicle. The results of the experiments show that the DOC-DPF system is very useful for reducing PM emissions. It is also found that the back pressure is acceptable, and the rate of power loss is less than 5%. By applying the HPL EGR system to the diesel engine, the NOx emissions under low- and middle-load conditions are reduced effectively because of the high differential pressure between the turbocharger inlet and the intake manifold. The NOx emissions can be decreased by increasing the EGR rate, but total hydrocarbon (THC) emission increases because of the increased fuel consumption needed to compensate for the power loss caused by EGR and DPF.