• 신재생에너지
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• 제2권1호
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• pp.66-71
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• 2006

CDM(Clean Development Mechanism) is one of three Kyoto mechanisms. As a non-annex I party of UNFCCC, Korea can host CDM projects. Currently eight CDM projects are hosted in Korea under Kyoto protocol. Six of these CDM projects are related to renewable energy power generation. Renewable energy power plants assumes zero GHGs emission and has great potential to become COM projects which is very environmental friendly energy. Gangwon wind park CDM project is the first renewable CDM project in Korea. In this research, emission factors and additionality proving process are studied, which are important procedures of doing CDM project.

• Bulletin of the Korean Chemical Society
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• 제20권1호
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• pp.81-84
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• 1999

The emission and excitation spectra of [Cr(NH3)5(imH)](ClO4)3·H2O (imH=imidazole) taken at 77 K are reported. The 298 K visible and far-infrared spectra are also measured. The vibrational intervals of the electronic ground state are extracted from the far-infrared and emission spectra. The ten electronic bands due to spin-allowed and spin-forbidden transitions are assigned. Using the observed transitions, a ligand field analysis has been performed to determine the bonding properties of coordinated imidazole in the title chromium(Ⅲ) complex. It is confirmed that nitrogen atom of the imidazole ligand has a medium it-acceptor property toward chromium(Ⅲ) ion. The zero-phonon line in the excitation spectrum splits into two components by 181 cm-1, and the large 2Eg splitting can be reproduced by the ligand field theory.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.842-846
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• 2004

Both traffic congestion and air pollution in the metropolitan area can be greatly relieved by promoting the use of public transportation with zero emission system. Bus and subway are very convenient means for the people moving in the route areas. But they are not enough to satisfy handicapped or old people to have access to them and also do not solve environmental problems completely. New vehicle system, fuel cell track rapid transit, will be introduced as a countermeasure for such problems in the present paper.

• 한국막학회:학술대회논문집
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• 한국막학회 2004년도 첨단 분리막 연구동향
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• pp.123-134
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• 2004

연로로부터 화학에너지를 직접 전기에너지로 바꾸는 연료전지(Fuel Cells)중 고체형 고분자 전해질 연료전지(Polymer Electrolyte Membrane Fuel Cell: PEMFC)와 직접 메탄올 연료전지(Direct Methanol Fuel Cell: DMFC)는 효율이 높고, zero emission 가능성으로 차세대 수송용 전원으로 각광받고 있는 미래 환경친화적 에너지원이다. 수소와 산소(또는 공기)와의 반응을 이용한 것이 PEMFC이고, 수소를 연료로 쓰지 않고 액체상 메탄올을 직접 연료로 사용하는 것이 DMFC이다. (중략)

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2003년도 춘계 학술발표회 논문집
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• pp.617-620
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• 2003

열분해를 이용한 폐기물의 처리가 여러 유해물질을 저감시킬 수 있다는 기대감으로 국내에서도 열분해를 이용한 폐기물 처리 관련 연구가 많이 진행되고 있다. 아울러 폐기물을 열분해 한 후에 산소를 공급하여 가스화와 동시에 잔재를 용융시키는 열분해 가스화 용융이나 예열공기와 혼합하여 고온으로 연소시키면서 잔재를 용융하는 열분해 연소 용융 등의 방식이 개발되면서 다이옥신과 소각재의 발생을 차단하는, 환경적으로는 제로 에미션(zero-emission)에 근접하는 기술에 대한 관심도 높아지고 있다.(중략)

• International Journal of Automotive Technology
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• 제7권4호
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• pp.407-413
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• 2006

The liquefied petroleum gas(LPG), mixture of propane and butane, has the potential to reduce toxic hydrocarbon emissions and inhibit ozone formation due to its chemical composition. Conventional mixer systems, however, have problems in meeting the future lower emission standards because of the difficulty in controlling air-fuel ratio precisely according to mileage tar accumulation. Liquid Phase LPG injection(LPLi) system has several advantages in more precise fuel metering and higher engine performance than those of the conventional mixer type. On the other hands, leakage problem of LPLi system at the injector tip is a main obstacle for meeting more stringent future emission regulations because these phenomena might cause excessive amount of THC emission during cold and hot restart phase. The main focus of this paper is the development of a leaked fuel recirculation system, which can eliminate the leaked fuel at the intake system with the activated carbon canister. Leaked fuel level was evaluated by using a fast response THC analyzer and gas chromatography. The result shows that THC concentration during cold and hot restart stage decreases by over 60%, and recirculation system is an effective method to meet the SULEV standard of the LPLi engine.

• 한국컴퓨터정보학회논문지
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• 제19권12호
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• pp.319-328
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• 2014

지구 기후 변화 정책에 대한 논쟁의 대부분은 그들의 정치적 호소에 대한 초점을 맞추고 있지만, 이 논문은 계약의 약속이 보다 효율적임을 제기한다. 이 목표에 부합하는 기후 정책은 상당한 배출 감축을 목표로 한다. 이러한 시나리오가 지구 평균 기온의 증가를 제한한다. 21세기 중반까지 2010에 비해 40~70%에 의해 세계 온실 가스 배출량을 낮추겠다는 의미이며, 대기로부터 이산화탄소를 제거할 수 있다는 결론에 이른다. 이 논문은 환경과 개발(UNCED)에 관한 유엔 회의 자료를 분석하여 이러한 비교를 제공한다. 분석내용은 결론적으로 각 나라들이 협정에서 제시한대로 배출오염 물질을 줄이는데 이행하고 지구 온난화의 지속적인 발전방안이 요구되는 협력체계가 중요하다는 것을 확인하였다.

• 신재생에너지
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• 제6권4호
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• pp.15-29
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• 2010

In order to make the best choice for $CO_2$ abatement using renewable energy technologies, it is important to be able to adapt these technologies on the basis of their sustainability, which may include a variety of environmental indicators. This study examined the comparative sustainability of renewable technologies in terms of their life cycle $CO_2$ emissions and embodied energy, using life cycle analysis. The models developed were based on case studies of bioenergy pilot plant in P city of Kyungki province. Final results were total emission of $CO_2$ in Pocheonsi is 670,041 $tCO_2$, around 500,877 $tCO_2$ for electricity and for heat generation, and 169,164 $tCO_2$ for transportation. When used $1,984\;m^3$/day of waste (pig manure etc.) and operated CHP with wood chips of 144,664 ton/year, the $CO_2$ emission in P city was left as is an emission of 449,274 $tCO_2$ and an abatement of $CO_2$ in this region was increased by 32.9%.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2013년도 제46회 KOSCO SYMPOSIUM 초록집
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• pp.109-110
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• 2013

This paper describes gas turbine combustion characteristics of synthetic natural gas which contains a small amount hydrogen content. By conducting ambient pressure high temperature combustion test at gas turbine relevant combustor geometry, the combustion characteristics such as combustion instability, NOx and CO emission, temperatures at turbine inlet, nozzle and dump plane, and flame structure from high speed OH chemiluminescence images were investigated when changing hydrogen content from zero to 5%. From the results, qualitative and quantitative relationships are derived between key aspects of combustion performance, notably NOx/CO emission and combustion instability. Natural gas containing hydrogen up to 5% does not show significant difference in view of all combustion characteristics except combustion instability. Only up to 1% hydrogen addition could not change the pressure fluctuation and phase gas between fluctuations of pressure and heat release. From the results, it can be concluded that synthetic national gas which contains 1% of hydrogen can be guaranteed for the stable and reliable operation of natural gas firing gas turbine.

• International Journal of Automotive Technology
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• 제8권5호
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• pp.575-581
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• 2007

As current and future automobile emission regulations become more stringent, the research on flow distribution for an exhaust manifold and close-coupled catalyst(CCC) has become an interesting and remarkable subjects. The design of a CCC and exhaust manifold is a formidable task due to the complexity of the flow distribution caused by the pulsating flows from piston motion and engine combustion. Transient flow at the exhaust manifold can be analyzed with various computational fluid dynamics(CFD) tools. However, the results of such simulations must be verified with appropriate experimental data from real engine operating condition. In this study, an experimental approach was performed to investigate the flow distribution of exhaust gases for conventional cast types and stainless steel bending types of a four-cylinder engine. The pressure distribution of each exhaust sub-component was measured using a simulated dynamic flow bench and five-hole pitot probe. Moreover, using the results of the pitot tube measurement at the exit of the CCC, the flow distribution for two types of manifolds(cast type and bending type) was compared in terms of flow uniformity. Based on these experimental techniques, this study can be highly applicable to the design and optimization of exhaust for the better use of catalytic converters to meet the PZEV emission regulation.