• Title/Summary/Keyword: 배기가스 배출

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$NO_x$ Control by Flue Gas Recirculation in Pulverized Coal Combustion (미분탄 연소에서 배기가스 재순환에 의한 질소산화물 제어)

  • 장길홍;장인갑;선칠영;천무환;양관모
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 1999.10a
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    • pp.473-474
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    • 1999
  • 일반적으로 NOx배출은 연소과정에 의해 강력하게 지배되고 있으며, NOx 저감 기술은 1970년대 후반부터 많은 연구들이 수행되어, 그 이론들이 확립되고 있다. 석탄 연소시스템에서는 공기 다단(air staging, OFA), 연료다단(fuel staging, reburning) 및 배기가스 재순환(FGR) 등이 대표적인 NOx 저감 기술이며 [1∼4], 그 중 배기가스 재순환법은 저산소 배기가스를 연소용 공기에 재혼입시키므로써 NO의 생성속도를 저하시켜 NOx를 저감시키는 기법이다.(중략)

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A Study on the Ship's ORC Power System using Seawater Temperature Difference (선박의 해수 온도차를 이용한 ORC 발전 시스템에 관한 연구)

  • Oh, Cheol;Song, Young-Uk
    • Journal of Navigation and Port Research
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    • v.36 no.5
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    • pp.349-355
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    • 2012
  • In this study, for the purpose of reduction of $CO_2$ gas emission and to increase recovery of waste heat from ships, the ORC(Organic Rankine Cycle) is investigated and offered for the conversion of temperature heat to electricity from waste heat energy from ships. Simulation is performed with waste heat from the exhaust gasse which is relatively high temperature and cooling sea water which is relatively low temperature from ships. The result shows that 1,000kW power generation is available from exhaust gas and 600kW power generation is available from sea water cooling system. Different fluid is used for simulation of the ORC system with variable temperature and flow condition and efficiency of system and output power is compared.

A Control of Gases Emitted from Mobile Vehicles using a Down-Pit-Damper Method (완성차 검사공정에서의 하방형 PIT DAMPER 방법에 의한 이동성 배출가스 제어의 연구)

  • 강인묵;이병규
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2001.11a
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    • pp.211-212
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    • 2001
  • 자동차 생산공정은 일반적으로 프레스, 차체, 도장, 의장으로 구분되어 진다. 특히 차량의 조립 완성 후 엔진과 하부 샤시를 검사하는 Test 라인 공정에서는 차량운전 상태에서만 검사를 실시하는 작업특성 때문에 자동차 배기가스가 실내환경 오염을 유발하고 있다. 그래서 대부분 자동차 공장의 경우 배출가스에 대한 제어방식 및 배기 유량 부족으로 자동차 생산을 위하여 실내에서 작업하는 근로자들에게 두통 및 호흡기질환이 유발되고 있다. (중략)

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Emission Estimation for Airports in Korea Using AEIC Program (AEIC 프로그램을 사용한 국내 공항 항공 온실가스 배출량 산정)

  • Joo, Hee-jin;Hwang, Ho-yon;Lim, Dongwook
    • Journal of Advanced Navigation Technology
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    • v.20 no.4
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    • pp.275-284
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    • 2016
  • The potential impact of aircraft emissions on the current and projected climate of our planet is one of the more important environmental issues facing the aviation industry. Increasing concern over the potential negative effects of greenhouse gas emissions has motivated aircraft emission estimation and prediction as one of the ways to reduce aircraft emissions and mitigate the impact of aviation on climate. We obtained airline flight schedules for all the airports in Korea that are included in OAG data. Fuel burn and emission index of LTO flight which contains take off, climb and approach under 3000ft and Non LTO flight which contains climb, cruise and descent over 3000ft for all the airports in Korea in 2005 were estimated and analysed for each condition using AEIC software which has been developed by MIT Lab for Aviation and Environment.

자동차 배기가스와 대기오염(2)

  • Lee, Yeong-Ju
    • Defense and Technology
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    • no.8 s.282
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    • pp.72-83
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    • 2002
  • 서울을 비롯한 대도시의 자동차에 대한 대기환경 오염물질 배출량은 앞으로도 계속 가속화될 것이며 교통량의 증가에 따른 교통난, 각종 사고유발과 함계 환경오염 문제는 심각한 요인으로 등장할 것이다. 도로에서 자동차는 이제 사고뿐만이 아닌 달리는 오염물질 생산기로서 자동차의 배출가스를 줄이기 위해서는 기술적 연구 못지않게 자동차 생산 및 정비에 종사하는 사람들 그리고 운전자 개개인의 바람직한 운전습관, 운전자세 등의 노력이 매우 중요하다.

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Emission factors based estimation of exhaust emissions with biodiesel blended fuel from naval vessel propulsive diesel engine (바이오디젤 혼합연료를 사용하는 함정추진디젤기관의 배출계수를 이용한 배기가스 배출량 예측)

  • Lee, Hyungmin
    • Journal of Advanced Marine Engineering and Technology
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    • v.37 no.4
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    • pp.332-337
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    • 2013
  • National investment was performed in the research and development of renewable energy because of climate change by air pollution, exhaustion of energy sources, energy security, and so on. Biodiesel fuel of the renewable energy is highlighted as friendly environment energy, it is possible to operate in regular diesel engines when it is blended with invariable ratios without making any changes. Emission factors have been estimated for commercial ship from various research institutes; however, it is difficult to develop emission factors for military vessels. In this work, biodiesel blended fuel emission factors for sulfur dioxide and carbon dioxide were quantitatively estimated from propulsive diesel engine installed on naval vessel using fuel property analysis. In addition, exhaust emissions were quantitatively calculated on the basis of fuel consumption rate with biodiesel content by percentage.

Aircraft Emission and Fuel Burn Estimation Due to Changes of Payload and Range (비행거리와 적재량 변화에 따른 항공기 온실가스 배출량 및 연료소모량 산정)

  • Joo, Hee-jin;Hwang, Ho-yon;Park, Byung-woon;Lim, Dongwook
    • Journal of Advanced Navigation Technology
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    • v.19 no.4
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    • pp.278-287
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    • 2015
  • The potential impact of aircraft emissions on the current and projected climate of our planet is one of the more important environmental issues facing the aviation industry. Increasing concern over the potential negative effects of greenhouse gas emissions has motivated the development of an aircraft emission estimation and prediction system as one of the ways to reduce aircraft emissions and mitigate the impact of aviation on climate. Hence, in this research, using Piano-X software which was developed by Lissys Co., fuel consumption and emissions for 3 types of aircraft were estimated for different design payloads with various flight distances and flight paths. Fuel burns for economy speed, long range cruise speed, maximum range speed were also investigated with various flight distances and altitudes.

Analysis Study of Liquid Apogee Engine Plume for Geostationary Satellite (정지궤도위성 궤도전이용 액체원지점엔진의 배기가스 해석 연구)

  • Lee, Chi Seong;Lee, Kyun Ho
    • Journal of Aerospace System Engineering
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    • v.12 no.5
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    • pp.8-15
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    • 2018
  • The geostationary satellite uses a liquid apogee engine, to obtain a required velocity increment to enter a geostationary orbit. However, as the liquid apogee engine operates in the vacuum, a considerable disbursement of exhaust plume flow, from the liquid apogee engine can trigger a backflow. As this backflow may possibly collide with the satellite directly, it can cause adverse effects such as surface contamination, thermal load, and altitude disturbance, that can generate performance reduction of the geostationary satellite. So, this study investigated exhaust plume behavior of 400 N grade liquid apogee engine numerically. To analyze exhaust plume behavior in vacuum condition, the DSMC (Direct Simulation Monte Carlo) method based on Boltzmann equation is used. As a result, thermal fluid characteristics of exhaust plume such as temperature and number density, are observed.

CFD를 이용한 흡수탑 내 유동 균일효과 연구

  • 이춘만;이호경
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.05a
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    • pp.106-106
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    • 2004
  • 보일러에서 연소된 후 배출된 가스는 탈황목적으로 설치된 흡수탑 내에 유입되어 Slurry Spray Nozzle에서 분사된 Limestone Slurry에 의해 배기가스중의 SO$_2$를 흡수한 다음 반응조로 떨어지게 되지만 분사된 액적의 일부는 배기가스의 압력에 의하여 같은 유동 방향으로 미세한 Mist의 형태로 배기가스와 함께 흡수탑의 Outlet Duct를 통해 빠져나간다. 이 Mist(액적크기 40 $\mu\textrm{m}$이하)에는 고형 성분이 함유되어 있는데 보통 Chloride농도가 높아 탈황설비 후단 (duct, GGH, Stack)에 plugging, 부식 등의 문제를 유발하므로 Spray Header상부에서 Mist Eliminator를 설치하여 Mist를 제거하도록 한다.(중략)

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Preliminary Experimental Study for Water Recovery and Particulate Matter Reduction through a Hybrid System that Combines Exhaust Cooling and Absorption from Ships (선박배출 배기냉각과 흡수식이 결합된 하이브리드 시스템을 통한 물 회수 및 미세먼지 저감을 위한 기초실험연구)

  • Youngmin Kim;Donggil Shin;Younghyun Ryu
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.7
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    • pp.1252-1258
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    • 2022
  • The exhaust gas from the marine engines include a quantity of water vapor and particulate matter. The total particulate matter includes filterable particulate matter (FPM) and condensable particulate matter (CPM) that condense after releasing into the atmosphere. The portion of CPM is higher than that of FPM that is removable through the filter before discharging. An experimental setup for waste heat and water recovery and removal of CPM in the exhaust gas was tested using an industrial gas boiler in the laboratory. The water and CPM in the exhaust gas were removed through the first stage of cooling method and further removed through the second stage of absorption method. The efficiencies of water recovery were 73% after the first stage of cooling method and 90% after the second stage of absorption method. At the same time, the CPM was removed by 80-90% through the processes. The waste heat recovered could be used to process heat, and the water recovered could be used to process water in the ship. Furthermore, the CPM, which is a major source of the particulate matter but not subject to administrative regulation, could be removed effectively.