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개발도상국 매립가스 CDM 등록사업의 예상실적과 감축실적 분석
유승민(Seungmin Ryu),박대원(Daewon Pak) 유기성자원학회 2021 유기물자원화 Vol.29 No.2
2015년 채택된 파리협정으로 2023년부터 탄소감축 이행여부를 점검함에 따라, 메탄가스 발생의 11%를 차지하고 있는 폐기물로부터 배출되는 온실가스 관리는 매우 중요하고 시급한 실정이다. 그럼에도 불구하고, 93%의 폐기물이 비위생적으로 매립되고 있는 개발도상국에서의 매립가스 관리는 여전히 도전적인 과제이다. 이에 CDM 사업을 활용하여 경제적으로 지속가능한 매립가스 자원화 사업이 다시 주목을 받고 있으며, 다양한 개발도상국의 매립장에서 매립가스 발생량과 온실가스 감축량을 산정하기 위한 연구가 활발히 진행되고 있다. 그러나 연구방법에 따라 예측된 수치와 CDM 사업으로 등록된 이후 모니터링을 통한 실측치 간에는 상당한 차이를 보이고 있으며, 차이가 발생한 원인에 대한 연구는 수행된 사례가 없었다. 이에 본 연구에서는 현재까지 UNFCCC에 등록된 매립가스 CDM 등록사업 46건 중 모니터링 을 수행한 사업 18건의 매립가스 프로젝트를 분석하였으며, 연구결과 강우량(28%), 설비고장(22%), 유기성분 함량(11%), 매립물량(11%), 매립지내 온도(11%) 등이 예측치와 실측치 간의 차이를 유발하는 주요 원인임을 확인할 수 있었다. 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.
Blocked force TPA기법을 이용한 압축기 가진력 예측
김흥섭(Heungseob Kim),유승민(Seungmin Ryu),윤득선(Duksun Yoon),백승환(Seunghwan Baek),김양수(Yangsoo Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
The conventional transmission path analysis method has the advantage that it is possible to predict the excitation force and analyze the contribution according to the transmission path, so that the problem can be clearly identified. However, in order to avoid interference between transmission paths, it is required to separate the powertrain from the vehicle, which adds to the cost. In order to improve this, this study performed the prediction of the electric vehicle compressor excitation force using the blocked force TPA technique. This predicted blocking force can be used to predict the sound pressure inside the vehicle or design the compressor mount.
강요한(Kang John),이경철(Kyungchul Lee),유승민(Seungmin Ryu) 이화여자대학교 생명의료법연구소 2011 생명윤리정책연구 Vol.5 No.1
Patient consenting is regarded as a very important process in the medical field. Hence, the adult guardianship, stipulated in the Civil Law, will introduce a new code regarding self-decision of incompetent patients. The new system, which is to respect welfare and rights of incompetent patients, bears the possibility of collision with existing medical-related specials laws. Thus, it should secure procedural justification to avoid the conflict with guardians duties and patients rights. In order to attain the goals of the new system, we should ensure that the new system is realistic and feasible based on detailed analysis of existing conditions, and thorough preparation is required to put it in practice in the field.
Pd/ZSM-5 촉매와 저온 플라즈마를 이용한 사과와 키위의 상온 저장 안정성 향상
김승건 ( Seung-geon Kim ),이호원 ( Ho-won Lee ),목영선 ( Young Sun Mok ),유승민 ( Seungmin Ryu ),전형원 ( Hyeongwon Jeon ),김성봉 ( Seong Bong Kim ) 한국공업화학회 2021 공업화학 Vol.32 No.5
본 연구에서는 촉매-플라즈마 반응기를 농산물(사과, 키위) 저장고에 적용하여 저장 중 발생되는 에틸렌을 제거하고자 하였다. 1 ㎥ 유닛 컨테이너 2개를 제작하여 에틸렌을 처리하지 않는 대조군과 발생하는 에틸렌을 촉매와 플라즈마에 의해 처리하는 실험군으로 구분하여 상온에서의 장기 저장성을 비교하였다. 또한 실험군에는 곰팡이 등의 세균 증식을 억제하기 위하여 소량의 오존을 주입하였다. 상온에서 사과와 키위를 각각 50 day와 57 day 동안 저장하여 에틸렌 농도 변화, 경도, 당도, 산도, 및 손실율을 비교하였다. 저장기간 동안의 에틸렌 농도 변화는 대조군이 실험군에 비해 높게 나타나 실험군에서 에틸렌이 효과적으로 제거되는 것으로 나타났다. 저장 후의 경도, 당도 및 당산비는 저장 전에 비해 좋게 나타났으며, 특히 키위가 사과에 비해 높게 향상하였다. 또한 저장 종료 후, 대조군에서 사과와 키위의 손실율은 각각 10%와 54.1%로 나타났으나, 실험군에서의 손실율은 각각 6%와 34.8%로 나타났다. 따라서 실험군의 저장성이 대조군에 비해 좋게 나타났다. A catalyst-plasma reactor was applied to the storage of agricultural products, e.g., apple and kiwi, to remove the ethylene generated during the storage. Two 1-㎥ unit containers were prepared, and the long-term storage stability of the control group at room temperature was compared with that of the experimental group of which the produced ethylene was treated by the catalyst-plasma reactor. In case of the experimental group, a small amount of ozone was injected to the unit container to suppress the growth of microorganisms such as mold. The apples and kiwis were stored at room temperature for 50 and 57 days, respectively, and the changes in ethylene concentration, hardness, sugar content, acidity, and loss rate were compared. The ethylene concentration during the storage for the control group was higher than that for the experimental group, indicating that the ethylene was effectively removed. Hardness, sugar content, and sugar acid ratio after the storage were better than before the storage, and in particular, the storage stability of kiwifruit was improved significantly. In addition, after the storage, the loss rates of apples and kiwis in the control group were 10 and 54.1%, respectively, but the loss rates in the experimental group were 6 and 34.8%, respectively. Therefore, the storage stability of the experimental group was a lot better than that of the control group.