• 한국ITS학회 논문지
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• 제12권3호
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• pp.114-128
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• 2013

현재 온실가스 배출량 산정 방법은 온실가스 저감대책 효과 분석이 불가능하며 차량의 이동특성이 반영이 안 된 실정으로 이를 극복할 수 있는 온실가스 배출량 산정 방법의 필요로 본 연구가 시작되었다. 교통수요 분석을 통해 차종, 교통상황에 따른 HBEFA 배출계수로 배출량을 산정하는 방법을 통해 고양시에 적용하여 분석하였다. 본연구의 지자체단위 교통수요 추정방안을 통해 실질적인 교통 이용특성에 맞는 온실가스 배출량이 산출되었다. 온실가스 지자체별 통행요금, 속도제한 등 온실가스 저감 요인들이 교통수요 모형에 반영되어 온실가스 저감 대책에 대한 효과분석 후 환경영향을 줄일 수 있는 방안을 강구하여 온실가스 저감 대책 마련에 효율적으로 이용될 것으로 판단된다.

• 산경연구논집
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• 제10권2호
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• pp.7-15
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• 2019

Purpose - The industrial structure upgrading can play an important role in promoting the carbon emission efficiency. Thus, this paper attempts to study the impact of industrial structure upgrading on carbon emission efficiency in order to reduce carbon emissions. Research design, data, and methodology - This paper selects panel data of 30 provinces and municipalities (autonomous regions) in China from 2001 to 2016, and divides them into three regions. The Moore index is used to measure the industrial structure upgrading, the non-radial SBM model based on undesired output is used to measure the slack variable to calculate the total factor carbon emission efficiency. Finally the impact of industrial structure upgrading on the carbon emission efficiency are analyzed. Results - It is found that the Moore index and the carbon emission efficiency in the eastern region is the highest in the three regions. Conclusions - The influence of various influencing factors on carbon emission efficiency is different between regions. The Moore index has a positive effect on the carbon emission efficiency in the eastern region, and has a negative influence coefficient on the central region. The effect on the western region is not obvious.

• 한국환경과학회지
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• 제13권7호
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• pp.703-710
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• 2004

Petroleum refineries have been considered as an important emission source for atmospheric volatile hazardous air pollutants(HAPs). The emission source includes petroleum refinery processes and process equipment. The control strategy for volatile HAPs requires emission estimations of these pollutants. However, systematic methods of volatile HAPs emission from petroleum refineries have not yet been established. Accordingly, present study surveyed the estimation method of volatile HAPs emitted from the petroleum refinery processes and process equipment. The emission estimation methods for the petroleum refinery processes are applied for 11 petroleum refining facilities: fluidized catalytic cracking, thermal cracking, moving bed catalytic cracking, compressed engine, blowdown system, vacuum distilled column condensator, natural gas or distilled boiler, natural gas or distilled heater, oil boiler, oil heater and flare. Four emission estimation methods applied for the petroleum refinery process equipment are as follows: average emission factor approach, screening ranges approach, EPA correlation approach and unit-specific correlation approach. The process equipment for which emission factors are available are valves, pump seals, connectors, flanges and open-ended lines.

• Journal of Advanced Marine Engineering and Technology
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• 제37권4호
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• pp.332-337
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• 2013

대기오염으로 인한 기후변화, 에너지 자원의 고갈 및 에너지 안보 등의 이유로 세계 각국에서는 신재생 에너지 연구 개발에 국가적 노력을 아끼지 않고 있다. 신재생 에너지 중 바이오디젤 연료는 기존의 디젤연료를 대체할 친환경 에너지로써 각광을 받고 있으며, 일정한 비율로 디젤연료와 혼합 시 기존 디젤기관의 개조 없이 사용가능하다. 다양한 연구결과에 의해 선박의 배기가스 배출계수는 지속적으로 예측되고 있지만 특수선박으로 분류되는 함정의 배출계수 연구결과는 부족한 실정이며, 특히 바이오디젤 혼합 연료에 대한 배기가스 배출계수는 함정뿐만 아니라 선박에서도 연구 실적이 부족한 상황이다. 본 논문에서는 해군함정에 탑재되어 있는 추진 디젤기관에 바이오디젤 혼합 연료를 적용시켰을 때 배출되는 이산화황 및 이산화탄소의 배출계수를 연료성분 분석 결과를 이용하여 구하고, 연료소비율 계산을 통하여 배출량을 정량적으로 예측하였다.

• Journal of Advanced Marine Engineering and Technology
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• 제25권6호
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• pp.1244-1249
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• 2001

The characteristics of engine performance with fuel injection system in D.I. diesel engine were studied in this paper A fuel injection system has an important role in the performance and emission gas in a diesel engine. In this paper, an experimental study has been performed to verify the effect of the performance and the emission gas with the factors such as diameters of an injection nozz1e hole, diameters of an injection pipe and injection timing in the fuel injection system. The authors have obtained the results that optimizing the factors of fuel injection system is siginificant to enhance the performance of the engine system and consumption ratio of fuel, smoke, and NOx.

• 한국자동차공학회논문집
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• 제10권2호
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• pp.80-86
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• 2002

A fuel injection system has an important role in the performance and emission gas in a diesel engine. In this paper, an experimental study has been performed to verify the effect of the performance and the emission gas with the factors such as diameters of an injection nozzle hole, diameters of an injection pipe, and injection timing in the fuel injection system. We have obtained the results that the fuel consumption ratio is reduced and NOx concentration is increased as the smaller diameter of injection nozz1e hole, the smaller diameter of injection pipe, and more advanced injection timing. They show that optimizing the factors of fuel injection system is significant to enhance the performance of the engine system and consumption ratio of fuel, smoke, and NOx.

• 한국기후변화학회지
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• 제5권4호
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• pp.349-357
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• 2014

Greenhouse gases (GHGs) from agricultural sector were categorized in a guideline book from Intergovernmental Panel on Climate Change (IPCC) as methane from rice paddy fields and nitrous oxide from agricultural soils. In general, GHG emissions were calculated by multiplying the activity data by emission factor. Tier 1 methodology uses IPCC default factors and Tier 2 uses country specific emission factors (CS). The CS and Scaling factors (SF) had been developed by NAAS (National Academy of Agricultural Science) projects from 2009 to 2012 to estimate how the advanced emissions. The purpose of this study was to compare GHG emissions calculated from IPCC default factors and NAAS CS and SF of agricultural sector in Korea. Methane emissions using CS and SF in rice paddy field was about 79% higher than those using IPCC default factors. In the agricultural soils, nitrous oxide emissions using CS from the 5 crops were about 40% lower than those using IPCC default. Except those 5 crops, approximately up to 52% lower emissions were calculated using CS compared to those using IPCC default factors. The total GHG emissions using CS and SF were about 33% higher than those using Tier 1 method by IPCC default factors.

• 한국기후변화학회지
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• 제4권1호
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• pp.27-39
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• 2013

본 연구에서는 국내에서 사용되는 무연탄을 국내무연탄, 원료용 수입무연탄, 연료용 수입무연탄으로 분류하여 각각의 발열량 및 온실가스 배출계수를 산정하였다. 본 연구에서 산정된 온실가스 배출계수는 국내무연탄이 $111,477{\pm}4,508kg\;CO_2/TJ$, 원료용 수입무연탄이 $108,358{\pm}4,033kg\;CO_2/TJ$, 연료용 수입무연탄이 $103,927{\pm}8,367kg\;CO_2/TJ$로 산정되었다. 산정된 배출계수를 이용한 온실가스 배출량은 $6,216,942ton\;CO_2$로 무연탄을 상세히 구분하지 않고 산정한 온실가스 배출량보다 12.7% 적게 나타났다. 이에 따라, 무연탄을 상세히 분류하여 활동자료를 수집하는 것이 무연탄의 활동자료를 통합하여 수집하는 것보다 정확한 온실가스 배출량을 산정할 수 있다고 판단된다. 또한, 국내에서 사용되고 있는 무연탄의 경우 IPCC에서 제시하고 있는 무연탄과 특성이 다르기 때문에 국가 온실가스 인벤토리 향상을 위해 무연탄을 용도별로 분류하여 산정해야 한다.

• 한국분무공학회지
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• 제23권4호
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• pp.221-226
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• 2018

Despite the increasingly stringent automotive emissions regulations, the impact of vehicle emissions on air pollution remains large. In addition, since the issue of emission of more exhaust gas than the exhaust gas measured in the test room when the vehicle passing the exhaust gas regulation standard is run on the actual road, many countries studied and introduced gas regulations about Real Driving Emission using Portable Emission Measurement System. At present, Korea regulations restrict the number of NOx and PN in diesel vehicles. In the case of gasoline vehicles, there is no regulation on emission gas, but there is a problem of continuing automobile exhaust gas problems and a large amount of gasoline GDI vehicle's PN emission. So research and interest are increasing due to this problem. In this study, characteristics of exhaust gas depending on changes of ambient temperature were analyzed among various factors affecting exhaust gas measurement of gasoline vehicles. As a result, at the low temperature test, the lower the ambient temperature, the more the exhaust gas was emitted. At ordinary temperature test, no specific tendency was observed due to changes of ambient temperature.

• 한국대기환경학회지
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• 제31권1호
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• pp.63-71
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• 2015

The gaseous and particulate emissions from agricultural crop residues burning were investigated. The test residues included white soybean stem, pepper stem, apple branch, peach branch, pear branch, grape branch, sesame stem, perilla stem, and barley stem. Particulate emissions were dominated by fine particles (< $0.1{\mu}m$ in size). The highest $PM_{2.5}$ Emission factors were from barley stems (35.2 g/kg), and the lowest from pepper stems (7.9 g/kg). Emission factors for CO, NO, and VOCs were 146~305 g/kg, 4.94~15.02 g/kg, 27.4~353.3 g/kg, respectively. Benzene played an important role in VOCs emissions from biomass burning.