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정애라(Aera Jeong),이현우(Hyunwoo Lee),박용성(Yongsung Park),이종현(Jonghyun Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
The CO₂ emission factor for Tier2 standard of transportation sector is developed, but there is no development cast of CH₄, N₂O emission factor based on energy in Korea. To get high reliability result of calculation data for emission quantity, we should get study data of Non-CO₂ emission factor which applied fuel characteristic and pattern of operating car. In Europe, it is investigated that they develop Tier2 emission factor with using Tier3 emission factor. therefore, we have developed Non-CO₂ emission factor based on the result of Tier3 emission factor. Furthermore, we have calculated emission factor of measurement of energy(kg/TJ) with applying fuel efficiency(km/L), density of different fuel and caloric value to Tier 3 emission factor(g/km). And then we deduced CH₄, N₂O emission factor(kg/TJ) according to different fuel and year by car with applying national velocity distribution and CO₂ emission rate to emission factor of energy.
국내연료의 고유탄소함유량에 의한 CO₂배출계수 및 배출량 산정 연구
정애라(Aera Jeong),정혁(Hyuk Jung),신용일(Yongil Shin),박용성(Yongsung Park),강형규(Hyungkyu Kang) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Method of Tier2 is calculated by the CO₂ emission factor and calorific values for intrinsic carbon content of domestic fuel. However, until the present, we have been applying the CO₂ emission factor of IPCC(Intergovernmental Panel On Climate Change) guidelines and calorific values for intrinsic carbon content of domestic fuel to calculate CO₂ emission of Tier2 level. So we think that estimated CO₂ emission is not accurate. In this study, the CO₂ emission factor and calorific values of gasoline, diesel and LPG according to intrinsic carbon content of domestic fuel are developed and be calculated CO₂ emission to be accurate estimation of CO₂ emission. As a results, the CO₂ emission factors of gasoline, diesel and LPG are 72,221㎏/TJ, 73,187㎏/TJ, 66,053㎏/TJ in each. The CO₂ emissions of gasoline, diesel and LPG are also 22,546,595ton, 41,200,441ton, 13,581,060ton in each per year.
고속도로 영업소에서 하이패스에 의한 온실가스 저감효과 연구
정애라(Aera Jeong),정혁(Hyuk Jung),최승환(Seunghwan Choi),최동석(Dongseok Choi),김훈명(Hunmyoung Kim),박용성(Yongsung Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The Hi-pass, which is the representative of Green house gas reduction from the road, succeeded to reduce the serious CO₂ emission and fuel with vehicle increase for last years. The increase of user who experiences the convenient and fuel saving effect by Hi-pass occurred. This study was investigated CO₂ emission comparing on the Hi-pass and the normal roads. To measure CO₂ emission, 4 types of test vehicles which is compact, small, medium and large size were used. CO₂ emission was calculated by fuel consumption from test vehicles. The normal roads had 315,835 ton CO₂ emission. However, The Hi-pass roads had 293,057 ton. These test results show that Hi-pass has reduction effect of CO₂ emission of 22,778ton.
The Slewing Mirror Telescope of the Ultra Fast Flash Observatory Pathfinder
정수민,최지녕,정애라,김민빈,김석환,김예원,김지은,이직,임희진,나고운,남지우,박일흥,서정은,Jeong, Soomin,Choi, Ji Nyeong,Jung, Aera,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Kim, Jieun,Lee, Jik,Lim, Heuijin,Na, Go Woon,Nam, Jiwoo,Park, Il Hung 한국천문학회 2012 天文學會報 Vol.37 No.2
The Slewing Mirror Telescope (SMT) is a key telescope of Ultra-Fast Flash Observatory (UFFO) space project to explore the first sub-minute or sub-seconds early photons from the Gamma Ray Bursts (GRBs) afterglows. The first realization of UFFO is the 20kg UFFO-Pathfinder (UFFO-P) to be launched on board the Russian Lomonosov satellite in 2013 by the Soyuz-2 rocket. Once the UFFO Burst Alert & Trigger Telescope (UBAT) detects the GRBs, Slewing mirror (SM) will rotate to bring the GRB into the SMT's field of view instead of slewing the entire spacecraft. SMT can image the UV/Optical counterpart with about 4-arcsec accuracy. However it will provide a important understanding of the GRB mechanism by measuring the sub-minute optical photons from GRBs. SMT can respond to the trigger over $35^{\circ}{\times}35^{\circ}$ wide field of view within 1 sec by using Slewing Mirror Stage (SMS). SMT has 10-cm Ritchey-Chretien telescope and $256{\times}256$ pixilated Intensified Charge-Coupled Device (ICCD) on focal plane. In this paper, we discuss the overall design of UFFO-P SMT instrument and payloads development status.
최지녕,최연주,정수민,정애라,김민빈,김지은,김석환,김예원,이직,임희진,민경욱,나고운,남지우,박일흥,서정은,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Min Bin,Kim, Ji Eun,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, Kyung Wo 한국천문학회 2012 天文學會報 Vol.37 No.2
UFFO Burst Alert & Trigger telescope (UBAT) is one of major instruments of UFFO-Pathfinder. The UBAT aims at 10 arcmin resolution localization of Gamma Ray Bursts with X-ray coded mask technique. It has $400mm{\times}400mm$ coded mask aperture, hopper, shielding and detector module with effective area of $191cm^2$. The detector module consists of an assembly of 36 64-ch MAPMTs and $25mm{\times}25mm$ pixellated YSO crystal array, and associated analog and digital electronics of about 2500 channels. We performed a vibration test using a dummy MAPMT with the detector module structure to measure the indused stress applied onto the MAPMT. We designed a sub-structure on the detector module to avoid the resonance that would otherwise deforms the detector module structure. A finite element analysis confirms the reduction of the load acceleration down to 12g. The experimental results are to be reported. Consequently, it proves that the MAPMT arrays of the flight UBAT detector module structure would survive in the space launch environment.
The Electronics system of the Ultra Fast Flash Observatory Pathfinder
김지은,최지녕,최연주,정수민,정애라,김민빈,김석환,김예원,이직,임희진,민경욱,나고운,박일흥,서정은,Kim, Ji Eun,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, Kyung Wook,N 한국천문학회 2012 天文學會報 Vol.37 No.2
The Ultra Fast Flash Observatory (UFFO) pathfinder consists of the UFFO Burst Alert X-ray Trigger telescope (UBAT) and the Slewing Mirror Telescope (SMT). They are controlled by the UFFO Data Acquisition system (UDAQ). The UBAT triggers Gamma-Ray Bursts(GRBs) and sends the position information to the SMT. The SMT slews the motorized mirror rapidly to the GRB position to take the UV/Optical data within a second after trigger. The UDAQ controls each instrument, communicates with the satellite, collects the data from UBAT and SMT, and transfers them to the satellite. Each instrument uses its own field programmable gates arrays (FPGA) for low power consumption and fast processing, and all functions are implemented in FPGAs without using microprocessors. The entire electronics system of the UFFO pathfinder including architecture, control, and data flow will be presented.
유선아(Seona Yu),정애라(Aera Jeong),정혁(Hyuk Jung),이현우(Hyunwoo Lee),권해붕(Haebung Gwon),박용성(Yongsung Park) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Method of Tier2 is calculated by the CO₂ emission factor and property of domestic fuel. However, until the present, we have been applying the CO₂ emission factor of IPCC(Intergovernmental Panel On Climate Change) guidelines and calorific values for intrinsic carbon content of domestic fuel to calculate CO₂ emission of Tier2 level. So we think that estimated CO₂ emission is not accurate. In this study, the CO₂ emission factor and calorific values of gasoline, diesel and LPG according to property (density, calorific values, intrinsic carbon content) of domestic fuel is developed and be calculated CO₂ emission to be accurate estimation of CO₂ emission. As a results, the CO₂ emission factors of Gasoline, Diesel, LPG and CNG are 72,940kg/TJ, 73,170kg/TJ, 66,070kg/TJ, 55,380kg/TJ in each.
최승환(Seunghwan Choi),정애라(Aera jeong),김배수(Baesoo Kim),이정기(Jungki Lee),박용성(Yongsung Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Eco driving is considered as one of good solutions for high fuel consumption rate and low concentration of green house gases. Generally, fuel economy is defined as km/L, but vehicle velocity does not considered. The comparison of fuel economy for several vehicles is only possible to the same vehicle speed conditions. To solve the problems, the authors define the eco-index and this study shows the characteristics of eco-driving by using the eco-index.