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이륜자동차에서 발생되는 PM2.5 및 유해대기오염물질의 배출가스 영향 평가
임윤성(Yunsung Lim),이종태(Jongtae Lee),강대일(Daiil Kang),임철수(Cheolsoo Lim),고종민(Jongmin Koh),임태홍(Taehong Lim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Because increased food delivery service and quick delivery service using motorcycle, registration number of motorcycle was sharply increased and it could contribute on worsening air quality. This study two models(50㏄, 125㏄) of motorcycle were tested by three engine oil types. Two motorcycles were tested with CVS-40 mode for air pollutants such as CO, THC, NOx, Elemental Carbon(EC), Organic Carbon(OC), sulfate, soot and SOF(soluble organic fraction)
류정호(Jungho Ryu),엄명도(Myoungdo Eom),권상일(Sangil Kwon),임철수(Cheolsoo Lim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In Rio de Janeiro in June 1992, The around world adapt convention on climate change which indicated to start international effort for prevention of greenhouse. According to agree the obligatory reduction of greenhouse gas specified Gyoto protocol, Our country which is 10th of the world in greenhouse gas emission, member of OECD wilt be pressured to reduce greenhouse gas. In this study in order to prepare obligatory reduction measure estimated the greenhouse gas emission factor and emission from automobile which is basic data to make emission statistics by Tier 3 method. To estimate greenhouse gas emission characteristics from automobile, greenhouse gas emission from was measured using driving pattern. CO₂, N₂O, CH₄ emission of passenger cars and light duty diesel vehicles were evaluated on chassis dynamometer for the cars selected by fuel, manufacturer, model year, displacement and CO₂, N₂O, CH₄ emission of heavy duty diesel engines were evaluated on engine dynamometer for the engine selected by manufacturer and production year.
다단임팩터, SMPS 및 ELPI를 이용한 디젤배출입자의 크기분포 측정
권순박(Soonbark Kwon),김대성(Daeseong Kim),이창(Chang Lee),이규원(Kyoowon Lee),임철수(Cheolsoo Lim),류정호(Jungho Ryu),엄명도(Myungdo Eom),조규백(Gyubaek Cho),김홍석(Hongsuk Kim),정용일(Youngil Jung),이종덕(Jongduk Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The size and mass distribution of diesel exhaust particles were measured using a cascade impactor, SMPS and ELPI with different engine operating conditions in engine speed and ratio. It was found that the total emission was increased with increasing engine speed and load ratio and about 80% of diesel exhaust particles were less than lum. The results of real time measurement of diesel particles by SMPS and ELPI showed that the peak diameter and number concentration increased as engine load ratio increased. It is interesting to note that the increasing rate at the size range of 265~385nm was the highest, while the nuclei mode particles (<50nm) were decreased or maintained constant when the engine load ratio increased. The size distribution measured dy SMPS and ELPI synchronously showed the reasonable correlations, however, the significant differences in absolute number concentration was observed.
김민희 ( Minhee Kim ),이정희 ( Junghee Lee ),성경희 ( Kyounghee Sung ),임철수 ( Cheolsoo Lim ),황원재 ( Wonjae Hwang ),현승훈 ( Seunghun Hyun ) 한국물환경학회 2022 한국물환경학회지 Vol.38 No.1
Climate change has increased the average air temperature. Rising air temperature are absorbed by water bodies, leading to increasing water temperature. Increased water temperature will cause eutrophication and excess algal growth, which will reduce water quality. In this study, long-term trends of air and water temperatures in the Han-river basin over the period of 1997-2020 were discussed to assess the impacts of climate change. Future (∼2100s) levels of air temperature were predicted based on the climate change scenarios (Representative concentration pathway (RCP) 2.6, 4.5, 6.0, and 8.5). The results showed that air and water temperatures rose at an average rate of 0.027°C year<sup>-1</sup> and 0.038°C year<sup>-1</sup> respectively, over the past 24 years (1997 to 2020). Future air temperatures under RCP 2.6, 4.5, 6.0, and 8.5 increased up to 0.32°C 1.18°C, 2.14°C, and 3.51°C, respectively. An increasing water temperature could dissolve more minerals from the surrounding rock and will therefore have a higher electrical conductivity. It is the opposite when considering a gas, such as oxygen, dissolved in the water. Water temperature also governs the kinds of organisms that can live in rivers and lakes. Fish, insects, zooplankton, phytoplankton, and other aquatic species all have a preferred temperature range. As temperatures get too far above or below this preferred range, the number of individuals of the species decreases until finally there are none. Therefore, changes of water temperature that are induced by climate change have important implications on water supplies, water quality, and aquatic ecosystems of a watershed.
유영숙(Youngsook Lyu),엄명도(Myoungdo Eom),류정호(Jungho Ryu),박용희(Yonghee Park),김선문(Sunmoon Kim),임철수(Cheolsoo Lim),김종춘(Jongchoon Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Emissions from automobiles have long been considered a prime source of pollutants involved in smog formation and ozone production. Especially VOCs are associated with serious environmental problems such as photochemical smog as well as human health effects. Since motor vehicles are a major source of VOCs, estimation of emission from mobile source is the most important factor to control VOCs in atmosphere. In this study in order to evaluate tailpipe VOCs emission from motor vehicles, mass emissions of non-methane volatile organic compounds from 20 vehicles were determined. Measurments were made on a chassis dynamometer using CVS-75 mode and speed specific drive mode depend on the driving velocity. Target VOCs are 53 compounds determined as the volatile ozone precursor. The individual VOCs composition of vehicle emission and emission rate were also determined. In case of gasoline vehicles, VOCs emission from over 80,000㎞ vehicles were about 46% larger than less 80000㎞ vehicles. The difference between benzene and toluene according to driving mileage was 44% and 26% respectively. The composition of VOCs were different by fuel type. The order of VOCs composition was paraffins(44%)>aromatics(34%)>olefins in gasoline vehicle emission, paraffins>olefins>aromatics in light duty diesel vehicle emission. The VOCs emissions were decreased as vehicle speed increasing. From these results we finally determined the various emission factor by kind of vehicle. In future, this research will be used for calculating total VOCs emission from automobiles.
엄명도(MyoungDo EOM),류정호(JungHo RYU),유영숙(YoungSook LYU),김종춘(JongChun KIM),김선문(SunMoon KIM),임철수(CheolSoo LIM) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
We investigated the tailpipe VOCs emission from motor vehicle last year and continuously studied the evaporative emission of gasoline and LPG vehicle this year. On the basis of the results of these studies, the basic emission factor and management plan for motor vehicle related VOCs emissions are proposed.<br/> The result of this study shows that the diurnal breathing loss emission rate was large than hot soak emission rate about 2 times, and the evaporative VOCs emissions from ove<br/> 80,000km vehicle were 2 times larger than less 80,000km vehicle. As the fuel R VP increased from 7 to 11, the emission rate also increased more than 2 times.<br/> The individual composition of evaporative VOCs was different by fuel type. In case of gasoline vehicle, the order of evaporative VOCs composition was paraffins>aromatics>olefins, and some kinds of health effective aromatics like benzene, toluene, ethylbenzene, xylene were included more than 10%. In case of LPG vehicle, the most abundant component of evaporative and exhaust VOCs emission was butane.<br/>
가솔린 연료 첨가제의 함유율에 따른 연소 및 배출가스 특성
이태규(Taekyu Lee),최연수(Yeonsoo Choi),이성욱(Seang-Wock Lee),조용석(Yong-Seok Cho),임철수(Cheolsoo Lim),서충열(Chungyul Seo) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Since air pollution due to automobiles has been serious globally, various studies on the reduction of exhaust emissions have been conducted actively to meet emission standards by many countries specially in advanced countries. However, so far the automotive technology mainly focused on the development of engine itself has reached its limitation of technology. Thus future automobile technology must depend on the development of clean fuel. This research aims to investigate engine power and emissions by the blending rates of fuel additive in a single cylinder engine and also behavior of name propagation inside a constant volume chamber. In this test, comparison study was made by using a sub-octane and blending rates of ethanol(3, 6, 10%), ETBE(7.1, 14.2, 23.6%), and MTBE(6.1, 12.3, 20.4%) respectively.