• Journal of the Korea Organic Resources Recycling Association
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• v.29 no.2
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• pp.5-14
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• 2021

As the implementation of carbon reduction measures would be monitored starting from 2023 in line with the Paris Agreement, it is crucial and urgent to control GHGs emitted from wastes contributing to 11% of methane emissions. Despite such importance and urgency, 93% of wastes are deposited in unsanitary landfills in developing countries, presenting challenges to methane management. Against the backdrop, landfill gas-to-energy projects have once again drawn attention for their economic substantiality secured through CDM projects while there has been much research actively carried out to estimate methane emissions and GHG reductions in landfills located in developing countries. Although a signifiant difference was found between estimations calculated based on research methodologies and actual results monitored through registered CDM projects, there has not been a study conducted on what is causing such a difference. Accordingly, the research team conducted an analysis of 18 LFG projects out of 46 that were registered as LFG CDM projects under the UNFCCC and has identified precipitation(28%), malfunction(22%), organic content(11%), amount of landfilled waste(11%) and temperature(11%) as key parameters causing the difference between the amount of methane captured and the amount of GHG reduced.

• Journal of IKEEE
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• v.25 no.3
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• pp.556-564
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• 2021

This paper presents trends of safety improvement technologies for an electric propulsion system of eco-friendly ships. As an effort to reduce a green house effect, demands for eco-friendly ships have been increased. An energy storage system (ESS) is one of key systems in an eco-friendly ship and a lithium-ion battery generally used in an ESS system due to its high power density and efficiency. However, a lithium-ion battery is considered as one of reasons for ESS fire hazard. Since a fire extinguishing facility is especially limited in the ocean, safety issue in an eco-friendly ship is important. In this paper, recent safety improvement technologies for traction motors, ESS batteries and structures for eco-friendly ships are presented.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.603-613
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• 2021

As a core policy for achieving the goal of reducing greenhouse gas emissions in the building sector, Korea has enforced the mandatory certification of zero energy buildings for new public buildings from 2020. This study suggests energy-saving technologies and economic factors that building officials can refer to for decision-making on the implementation of zero energy buildings. For this study, the construction cost for the energy item of a building was analyzed by collecting the building energy efficiency level certification data and detailed construction cost statement data from public institutions for the last three years. Based on the building energy efficiency certification data, each energy item of the baseline building was derived, and the energy performance of the zero energy building was derived through repetitive simulations by gradually increasing the energy performance value of the baseline building. By applying the analyzed construction cost, the construction cost for each energy item of the baseline and zero energy buildings was derived. As a result, the lighting equipment contributed up to 10.5% energy savings, and the increase in construction cost of the cooling and heating system was at least 9.1%.

• Journal of the Korean Society for Marine Environment & Energy
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• v.8 no.1
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• pp.39-45
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• 2005

In the situation which Russia's ratification of the Kyoto protocol at February,2004, ANNEX I nations must reduce GHG(Green House Gas) discharge rate from 2008 by 2012 to the reduction level at 1990. We introduce the CO₂ ocean sequestration that is one of promising method for getting the stable CO₂ concentration in the atmosphere. There are four categories : ocean transportation technique, ocean initial dissolution technique, ocean deep current evaluation technique, and ocean biological evaluation technique. In this paper, we carried out the fundamental numerical study on the ocean initial dissolution technique, when the Liquidized CO₂ is emitted at the deep ocean, It is very important to the dissolution rate of movable CO₂ interface because it Is directly impact to the ocean organism. In order to investigate the relation of the interface movement and rate of the dissolution, we develope CR(Computational Fluid Dynamics) code that was constructed by the finite volume method based on the unstructured mesh, and a droplet's boundary surface can move and one direction dissolution from disperse phase into continuous phase adopted as its physics be. This study clarifies hydrodynamic relation between solubility and movement of the droplet through the verification of the Cm code.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.193-196
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• 2004

이산화탄소 저감 및 처리 기술개발 프로그램은 과학기술부에서 지원하고 있는 21세기 프론티어 사업 중 하나로, 2002년부터 2012년까지 연간 9백만 탄소 톤 상당의 이산화탄소 저감 및 처리기술개발과 개발기술의 상용화를 목표로 하고 있다. 동 프로그램의 주요 개발기술 분야는 고온순산소 연소기술, 반응분리 동시공정기술, 미활용에너지 이용기술, 이산화탄소 회수처리기술 등 4개 부문에 걸쳐 추진하고 있으며, 현재 1단계 2차년도 사업이 진행되고 있다. 동 프로그램의 목표는 단순한 기술개발에 머물지 않고 향후 실용화 가능성이 높은 과제를 선별하여 집중적인 투자와 함께 기술개발이 이루어지고 있으며 동 프로그램을 통해 이산화탄소 저감 기술 시장에서 우위를 확보하고 기술 이전 및 수출을 통해 연간 1.5조원의 경제적 효과와 함께 배출권 확보에 기여할 것으로 보고 있다. 본 논문에서는 기후변화에 관련된 온실가스 감축을 위해 추진되고 있는 이산화탄소 저감 및 처리기술의개발에 따른 성과제고를 위해 개발기술들을 대상으로 향후 발생될 여러 가지 영향요인(impact factor)을 발굴하고 이를토대로 결정론적 평가법 및 AHP기법을 이용한 분석평가를 수행하였다.

• International Journal of Highway Engineering
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• v.13 no.4
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• pp.159-166
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• 2011

Green house gas emissions are increasing as development of the industrial economy of the international community. Many countries in the world are endeavoring to reduce green house gas emissions under severe climate change. In order to protect grobal warming, government is trying to reduce green gas emissions under "Low Carbon Green Growth Policy" and investing climiate-firendly industries such as renewable energy harvesting. Renewable energy has been rapidly developing as a result of investment for development technology of using natural energy such as solar, wind, tidal, etc. There are lots of waste energy in the road space. However, nobody is not interested in waste energy from the road space. This paper present a fundamentally experimental study of energy harvesting technique to use waste energy in the road. The waste energy in the road is covered a pressure and impact of vehicles on the road, the radiant heat from asphalt pavement, road noise and vibration etc. In this study, an energy harvesting device using piezoelectric element is proposed and various tests are conducted to investigate a characteristic of this device as function of impact loading based on piezoelectric effect behavior. This paper shows the energy harvesting results of the device using domestic piezoelectirc element as a function of impact load size and pavement types.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.375-376
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• 2003

자동차 운행의 급증과 유류 및 유기 용제의 사용 확대로 인해 휘발성유기화합물질(Volatile Organic Compounds : VOC)의 배출은 증가추세에 있다. VOC는 오존 등 광화학스모그 원인 물질일 뿐만 아니라 발암성 등의 유해 물질, 지구온난화와 성층권 오존층 파괴의 원인물질, 대기 중 악취물질로서 환경 및 건강에 영향을 초래하여 VOC 대한 규제관리 및 감축에 대한 연구가 필요한 실정이다. 상용화된 VOC 저감기술로는 고온산화, 촉매산화, 흡착 등의 방법이 있으며 이 기술들은 농도, 에너지 requirement, 비용 및 부산물 처리 등의 문제가 있다. (중략)

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.625_626
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• 2009

전력선통신 기술은 전력선로 자체를 통신선로로 이용함으로서 전력회사에서 전력설비의 원격 감시 혹은 제어에 활용하기 매우 손쉬운 장점이 있다. 특히, 최근 부각되는 지구온난화에 대비한 에너지 절감 및 온실가스 감축을 위한 중요한 방편으로 인식되는 원격검침시스템을 전력선통신을 이용하여 구축할 경우, 경제적, 기술적으로 우수한 장점을 지닌다. 원격검침을 위해서는 일반적으로 기계식 전력량계를 전자식 전력량계로 교체하여야 하며, 전자식 전력량계가 인접한 전력선통신모뎀에 미치는 영향에 대해서는 연구된 바가 거의 없다. 따라서 본 논문에서는 전력량계가 미치는 잡음이나 삽입손실 등에 대한 특성을 시험 분석하고 전송특성에 어떻게 영향을 미치는 지 분석하여, 이를 바탕으로 전자식 전력량계의 규격 기준을 마련하고자 한다.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.373-373
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• 2018

화력발전소, 석유화학공단 등 대규모 배출원에서 발생되는 이산화탄소를 활용하여 온실가스의 배출을 줄이고, 경제적 가치를 창출할 수 있는 탄소자원화는 기후변화 대응을 위한 국가전략프로젝트 중 하나이다. 전 세계적으로 탄소자원화 기술은 아직 상용화 단계이지만 최근 강화된 온실가스 감축 의무로 인하여 탄소자원화 시장은 더욱 확대될 전망이다. 화력발전소의 이산화탄소 발생 과정에서 배출되는 수증기는 응축기술을 통하여 새로운 수원으로 활용이 가능하다. 응축된 물의 최적 활용과 사용처 지향적 효율적 물순환을 위한 시설 내 스마트 워터 그리드(SWG) 개념의 물분배 시스템은 발전 산업 내에 탄소자원화의 핵심기술로 사용될 수 있다. SWG는 시설 내 용수공급 관리에서의 관망 운영, 물 수요 관리 등 ICT를 활용한 종합적인 물 분배 시스템으로, 본 연구에서는 SWG 물순환 시스템의 국내외 기술조사를 통해 발전 산업 시설 내에 적용성을 검토하였다. 물의 재이용 시스템을 포함한 SWG 기술, 지능형 관망 운영 기법 기술, 실시간 수질 감시 체계 기술 연구를 기반으로, ICT 기반 용수공급 정보 관리 기술과 수운영 모니터링 기술을 통하여 SWG가 발전 산업 연계 기술로써 적용될 수 있도록 하였다. 본 연구에서 제시된 SWG 시스템을 적용한 산업 인프라를 통하여 산업적 파급 효과를 높이고, 이를 활용한 인력과 비용 절감이 기대되며, 저에너지, 고효율화를 위한 기술력과 글로벌 물 시장진출 경쟁력을 향상시키기 위한 기초연구자료로써 활용이 가능할 것으로 기대된다.

• Journal of Climate Change Research
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• v.1 no.3
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• pp.189-203
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• 2010

The objective of this study is the estimate of $CO_2$ emissions by the energy consumption of functional technology introduced by classifying energy use in households according to functions as well as energy resources. This study also intends to provide the practical basis data in order to establish specific alternatives for GHG mitigation in residential sector with examining the cause analysis affecting $CO_2$ emission increases from 1995 to 2007. The results of this study show a 6.6% increase in the total $CO_2$ from 60,636 thousand tons in 1995 to 64,611 thousand tons in 2007 by using energy in residential sector. Heating is the greatest $CO_2$ emission sector by use, followed electric appliances, cooking, lighting and cooling. Heating sector shows 56.6% reductions from 71.5% in 1995 and as do cooling and electric home appliances, with a 2.4% increase from 0.6% and a 21.8% increase from 14.2% respectively. To analyze factors resulted in $CO_2$ emissions in residential sector, the relevant indicator change rate from 2005 to 2007 was examined. The results find that population, the number of household, housing areas, family patterns, and family income resulted in the $CO_2$ emissions increase in residential sector from 1995 to 2007. On the other hand, carbon intensity and energy intensity contribute to $CO_2$ reduction in residential sector with -2% and -38.7% respectively because of the energy conversion and the improvement of energy efficiency in electronic appliances. This study can be used as a reference when taken account of the reality and considered the introduction of highly effective measures to increase the possibility of mitigation potential in residential sector hereafter.