• Title/Summary/Keyword: 탄소 배출

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Preparation and Characterization of Activated Carbon Derived from Leather Waste Discharged from Shinpyung Changrim Industrial Complex (신평 장림공단 피혁폐기물(皮革廢棄物)을 이용한 활성탄(活性炭) 제조(製造) 및 특성(特性))

  • Park, Seung-Cho;Nam, Jeong-Kwang;Kim, Jung-Sup
    • Resources Recycling
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    • v.17 no.1
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    • pp.20-28
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    • 2008
  • Leather waste discharged from Shinpyung Changrim Industrial Complex contained 46.3 percent of carbon, and weight loss of leather waste about 50 percent was observed at $500^{\circ}C$ by thermogravimetric analysis. Chemically activated carbon [LW4AC] was made at activation temperature of $800^{\circ}C$ during 30 minutes in electric furnace. Iodine value and decoloration of methylene blue was 968 mg/g and 158 mL/g, respectively. We found that pore volume was more developed according to the increase in the ratio of $K_2CO_3/LW$.

Predicting Forest Fire in Indonesia Using APCC's MME Seasonal Forecast (MME 기반 APCC 계절예측 자료를 활용한 인도네시아 산불 예측)

  • Cho, Jaepil
    • Proceedings of the Korea Water Resources Association Conference
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    • 2016.05a
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    • pp.7-7
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    • 2016
  • 인도네시아 산불에 의한 연무는 동남아시아 인접한 국가들에 있어서 심각한 환경문제 중 하나이다. 국제적으로 심각한 문제를 야기하는 인도네시아의 산불은 건조기에 강수량이 적게 내리는 극심한 가뭄 조건에서 발생한다. 건조기 강수량을 모니터링 하는 것은 산불 발생 가능성을 예측하기 위해 중요하지만 산불을 사전에 예방하고 영향을 최소화하기에는 부족하다. 따라서 산불에 대한 선제적 사전예방을 위해서는 수개월의 선행예측 기간을 갖는 조기경보 시스템이 절실하다. 따라서 본 연구는 인도네시아 산불에 대한 선제적 대응을 위한 강수량 예측시스템을 개발하고 예측성을 평가하여 동남아시아 지역의 화재 연무 조기경보 시스템의 시제품(Prototype)을 개발하는데 있다. 강수량 예측을 위해서 APEC 기후센터의 계절예측정보의 활용 정도에 따라서 4가지 서로 다른 방법을 통합하여 사용하였다. 예측정보 기반의 방법들로는 대상지역의 강수량 예측을 위해서 대상 지역 상공의 계절예측 강수자료를 보정을 통해 직접적으로 사용하는 SBC (Simple Bias Correction) 방법과 대상 지역 상공의 강수 예측자료를 사용하는 대신에 지역 강수량과 높은 상관 관계를 보이는 다른 지역의 대리변수를 예측인자로 사용하는 MWR (Moving Window Regression) 방법이 있다. 또한 예측자료의 사용 없이 과거자료 기반의 기후지수(Climate Index) 중에서 지체시간을 고려하여 지역 강수량과 높은 상관관계를 갖는 경우 예측에 활용하는 관측자료 기반의 CIR (Climate Index Regression) 방법과 예측기반 MWR과 관측기반의 CIR 방법에서 선정된 예측인자를 동시에 활용하는 ITR (Integrated Time Regression) 방법이 사용되었다. 장기 강수량 예측은 보르네오 섬의 4개 지역에서 3개월 이하의 선행예측기간에 대하여 0.5 이상의 TCC (Temporal Correlation Coefficient)의 값을 보여 양호한 예측성능을 보였다. 예측된 강수량 자료는 위성기반 관측 강수량 및 관측 탄소 배출량 관계에서 결정된 강수량의 임계값과의 비교를 통해 산불발생 가능성으로 환산하였다. 개발된 조기경보 시스템은 산불 발생에 가장 취약한 해당지역의 건조기(8월~10월) 강수량을 4월부터 예측해 산불 연무에 대한 조기경보를 수행한다. 개발된 화재 연무조기경보 시스템은 지속적인 개선을 통해 현장 실효성을 높여 동남아국가 정부의 화재 및 산림관리자들에게 보급함으로써 동남아의 화재 연무로 인한 환경문제 해결에 기여할 수 있으리라 판단된다.

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Trends in safety improvement technologies for an electric propulsion system of eco-friendly ships (친환경 선박용 전기추진시스템 안전성 향상 기술개발 동향)

  • Kim, Sehwan;Choi, Gilsu;Lee, Jae Suk
    • 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.

Domestic Bituminous Coal's Calorific Value Trend Analysis (2010~2014) and Carbon Emission Factor Development (국내 유연탄의 발열량 추이 분석(2010~2014년) 및 탄소배출계수 개발)

  • Kim, Min wook;Cho, Changsang;Jeon, Youngjae;Yang, Jinhyuk;Sin, Hochul;Jeon, Eui Chan
    • Journal of Climate Change Research
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    • v.7 no.4
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    • pp.513-520
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    • 2016
  • Korea's energy consumption has been constantly increasing. Final energy consumption was increased by an annual average of 2.9% compared to 2010. The consumption of all energy sources except for its oil was increased during the same time. While electric demand has increased coal consumption increased rapidly. Therefore, calorfic value and carbon emission factor development can improve the quality of Korea's greenhouse gas inventory. Calorific value is the amount of heat generated while burning coal. Caloric value is one of the most important factors in the development of carbon emission factors. Calorific value is used as the basis for the analysis of the various energy statistics. This study has calculated the other bituminous coal and coking coal's calorfic value by the data received from domestic coal-fired power plants and steel manufacturer. Calorofic value's trend analysis period is the year of 2010~2014. Through analyzing the carbon content it was calculated the carbon emission factor. The bituminous coal and coking coal's uncertainty analysis was performed using a Monte Carlo simulation.

Sub-bituminous Coal's Calorific Value Trend Analysis and Carbon Emission Factor Development (국내 아역청탄의 발열량 추이 분석과 탄소배출계수 개발)

  • Kim, Min wook;Cho, Changsang;Jeon, Youngjae;Yang, Jinhyuk;Sin, Hochul;Jeon, Eui Chan
    • Journal of Climate Change Research
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    • v.8 no.2
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    • pp.145-151
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    • 2017
  • Korea's energy consumption has been constantly increasing. Final energy consumption was increased by anannual average of 2.9% compared to 2010. The consumption of all energy sources except for its oil was increased during the same time. While electric demand has increased coal consumption increased rapidly. Therefore, calorfic value and carbon emission factor development can improve the quality of Korea's greenhouse gas inventory. Calorific value is the amount of heat generated while burning coal. Caloric value is one of the most important factors in the development of carbon emission factors. Calorific value is used as the basis for the analysis of the various energy statistics. This study has calculated the sub-bituminous coal's calorfic value by the data received from domestic coal-fired power plants. Calorofic value's trend analysis period is the year of 2011~2015. Through analyzing the carbon content it was calculated the carbon emission factor. The sub-bituminous coal's uncertainty analysis was performed using a Monte Carlo simulation.

Application and Development of Carbon Emissions Factors for Deciduous Species in Republic of Korea - Robinia pseudoacacia, Betula platyphylla, and Liriodendron tulipifera - (국내 활엽수종의 탄소배출계수 개발 및 적용 - 아까시나무, 자작나무, 백합나무를 대상으로 -)

  • Lee, Sun Jeoung;Yim, Jong Su;Kang, Jin Take;Kim, Raehyun;Son, Yowhan;Park, Gawn Su;Son, Yeong Mo
    • Journal of Climate Change Research
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    • v.8 no.4
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    • pp.393-399
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    • 2017
  • According to the United Nations Framework Convention on Climate Change (UNFCCC), all parties have to submit the national GHG inventory report. Estimating carbon stocks and changes in Land Use, Land-Use Changes and Forestry (LULUCF) needs an activity data and emission factors. So this study was conducted to develop carbon emission factor for Robinia pseudoacacia L., Betula platyphylla var. japonica, and Liriodendron tulipifera. As a result, the basic wood density ($g/cm_3$) was 0.64 for R. pseudoacacia, 0.55 for B. platyphylla, and 0.46 for L. tulipifera. Biomass expansion factor was 1.47 for R. pseudoacacia, 1.30 for B. platyphylla, and 1.24 for L. tulipifera. Root to shoot ratio was 0.48 for R. pseudoacacia, 0.29 for B. platyphylla, and 0.23 for L. tulipifera. Uncertainty of estimated emission factors on three species ranged from 3.39% to 27.43% within recommended value (30%) by IPCC. We calculated carbon stock and change using these emission factors. Three species stored carbon in forest and net $CO_2$ removal was $1,255,398\;t\;CO_2/yr$ during 5 years. So we concluded that our result could be used as emission factors for national GHG inventory report on forest sector.

A Study on the Establishment of the Microgrid in Chujado Island (추자도 마이크로그리드 구축에 관한 연구)

  • Kang, Min-Hyeok;Kim, Dong-Wan;Kim, Eel-Hwan
    • Journal of IKEEE
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    • v.23 no.1
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    • pp.289-294
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    • 2019
  • At present, domestic small islands mainly supply electric power using diesel generators. However, diesel generators can cause instability of the power system due to slow response on power load fluctuation, and cause environmental problems due to the emission of carbon gas by using fossil fuels. In order to overcome this problem, this paper proposes a method to establish an optimal microgrid by introducing solar power, wind power, and energy storage device to Chujado Island, which is supplied with electric power through a diesel generator. The economical optimum capacity of each distributed power source is calculated by using HOMER (Hybrid Optimization Model for Multiple Energy Resources) program and the proposed microgrid is validated by using PSCAD/EMTDC (Power Systems Computer Aided Design/ Electromagnetic Transients including DC) program which can analyze system stability.

Development and Application of Integrated Evaluation Index of Rainwater Drainage System based on the Life Cycle Assessment (LCA를 고려한 우수배제시스템 통합평가지표의 개발과 적용)

  • Ahn, Jungkyu;Park, Sung Won;Kim, Yong In
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.7
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    • pp.1-7
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    • 2019
  • To overcome the limitations of existing rainwater drainage systems, we compared and analyzed a newly developed eco-friendly channel-type rainwater drainage system. We also developed an integrated evaluation index to quantify the improvement of the new system. The concept of Life Cycle Assessment (LCA) was applied to calculate and compare the costs of each process and to develop the integrated evaluation index, which considers the carbon emissions by each process. As a result, the cost was reduced by 53% overall compared to an O-type system and by 63% compared to a U-type system. In addition, when applying the integrated evaluation index, the new system was evaluated to be over 80% in the four processes compared to the existing systems. When applying the evaluation index to sites in Anyang and Incheon, the new system was improved by 35-100% compared to existing systems.

Correlates between Urban Land Use and Manufacturing Industries Characteristics and Energy Consumption - A Case of Busan Metropolitan Area (토지이용 및 제조업 특성에 따른 에너지 사용량과의 상관성 분석 - 부산광역도시권 사례를 중심으로)

  • Lee, Yun Ju;Choi, Yeol
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.39 no.5
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    • pp.637-645
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    • 2019
  • Global warming and a new energy policy request the energy saving and pollutant emission control in municipal level. Previous studies focus on transportation in the Seoul metropolitan area which can easily meet the policy goal by reducing it. This study expands the area of urban energy planning to the industries and land use which takes up most of energy use of the city. We empirically study the Busan metropolitan area's 5 years natural gas and electricity consumption data by the industries and land use. Results show that energy usage significantly depends on not only population but also urbanizing intensity and industrial category. This paper address that the policy maker need to pay attention on energy usage pattern of each sectors during the planning.

A Study on the Energy Saving House System Using IOT Technology (IOT 기술을 활용한 에너지 절약 하우스 시스템 연구)

  • Huh, Myung-Hoi;Shin, shung-jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.20 no.6
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    • pp.109-113
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    • 2020
  • Against the backdrop of low-carbon, green growth, many attention is focused on a sustainable society where humans and nature coexist. Carbon emissions increase with energy consumption, which is 40 percent of the world's energy consumption by buildings. Korea has a plan to make zero-energy houses mandatory only for new buildings in 2025, but it is relying on private technology investment for its technology. The reality is that the current technology costs more than 1.5 times more than general buildings, and private companies do not have many zero-energy house complexes other than experimental houses. This study aims to study the new model of zero energy house by introducing IOT system that efficiently observes and controls energy in zero energy house, monitoring pleasant environment on the web and introducing resident proper temperature maintenance system.