• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.89.1-89.1
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• 2011

According to green growth's policy, green-home dissemination's projects are promoting. Among them, stationary fuel cell systems are receiving attention due to high efficiency and clear energy. But it need absolutely to develop cost down technologies and improve system durability for commercialization of the fuel cell system. To achieve this objectives, in 2009, the Korean Government and "Korea Institute of Energy Technology Evaluation and Planning(KETEP)" launched into the strategic development project of BOP technology for practical applications and commercializations of stationary fuel cell systems, named "Technology Development on Cost Reduction of BOP Components for 1kW Stationary Fuel Cell Systems to Promote Green-Home Dissemination Project". This paper introduces a summary of improved BOP performances that has been achieved through the 2nd year development precesses(2010.06~2011.05) base on 1st year development precesses(2009.06~2010.05). The major elements for fuel cell systems are cathode air blowers, burner air blowers, preferential oxidation air blowers, fuel blowers, cooling water pumps, reformer water pumps, heat recovery pumps, mass flow meters, electrical valves, safety valves and a low-voltage inverter. Key targets of those elements are the reduction of cost, power consumption and noise. Invert's key targets are development the low -voltage technologies in order to reduce the number of unit cell in fuel cell system's stack.

• 디지털융복합연구
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• 제20권5호
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• pp.211-220
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• 2022

본 연구는 폐쇄루프 공급망을 최적화하기 위한 녹색 폐쇄루프 공급망 네트워크(GCSN)를 제안한다. GCSN은 물류 유통과정에 투입되는 익스프레스 박스의 재활용에 중점을 두고 연구하였다. 이를 통해 물류공급망 작업의 표준화와 전자상거래 업체의 증가에 따른 익스프레스 박스의 사용의 가속화와 전자상거래 업계의 익스프레스 상자의 재활용을 통한 자원 낭비를 최소화하는 녹색공급망을 추진한다. GCSN은 유통흐름과 자원의 투입요소는 수학식으로 표현하며 LINGO를 사용하여 구현된다. 녹생 즉, 환경 보호의 관점에서 전자상거래 산업의 지속가능한 발전을 견인하는 유통의 과정이다. 또한 자원 부족에 따른 원자재 가격 상승에 대응하고 전자상거래 업체들의 친환경적으로 익스프레스 상자를 투입하는 전략의 필요성을 부각시켰다. 이와 같은 이유로 본 연구는 전자상거래 업체에서 사용하는 재활용이 가능한 익스프레스상자를 연구대상으로 하며, 공급망 네트워크에서 시설 위치와 할당문제도 통합적으로 고찰한다. 마지막으로 본 연구의 결론과 시사점을 도출하였다.

• 무역학회지
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• 제47권6호
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• pp.55-69
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• 2022

Within the worse of the environment, Climate change caused by global warming is becoming serious around the world, and green logistics to pursue sustainable development in the logistics sector are receiving more and more attention. Along with the acceleration of the global economy, eco-friendly issues are playing an increasingly important role in the logistics industry, and various policy measures are being pursued to establish the green logistics system. This study aims to analyze research trends in eco-friendly logistics, and the SNA methodology was applied by extracting keywords from 518 domestic and foreign papers from 2013 to August 2022. The period is divided into three stages: 2013-2015, 2016-2019, and 2020-2022, and 'logistics' and 'sustainable development' were derived as top logistics eco-friendly keywords at all stages. Besides, In the first stage(2013-2015), the term 'environmental performance' and 'freight transport' attracted the attention of scholars. In the second stage(2016-2019), keywords such as 'third-party logistics' and 'lean logistics' have attracted the attention of scholars. In the third stage(2020-2022), the 'internet of things' and 'circular economy' received the attention of scholars. In line with the growth of the economy, it was confirmed that research related to eco-friendly logistics is gradually expanding to a sustainable concept. Based on this study, it is possible to grasp the research trends of the academic community to cope with recent environmental changes and provides reference materials to consider future research directions.

• 한국토양비료학회지
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• 제44권2호
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• pp.181-186
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• 2011

녹비작물 헤어리베치를 이용하여 벼 재배 시 물 절약 기술을 개발하고자 2008년부터 2009년까지 경기도 수원시에 소재한 농촌진흥청 국립식량과학원 벼 시험포장 신흥통에서 수행하였다. 물관리 처리 내용은 관행시비구와 헤어리베치 투입구 내에 관행물관리구 (주 2~3회)와 주1회관개구를 설치하여 벼 이앙 후 30~38일부터 관개량, 벼 생육, 수량 및 수량구성요소, 토양물리성 변화를 조사하였다. 벼 유수형성기와 유숙기의 생육은 2년 모두 헤어리베치 투입구의 주1회 관개구가 관행시비구의 주1회관개구보다 양호하게 경과하였다. 관개량은 관행시비구의 관행물관리구에 비하여 헤어리베치 투입구의 주1회관개구가 2008년은 46.0%, 2009년 61.3%로 절감되었다. 벼 수량 및 수량구성요소도 2개년 모두 관행시비구의 물관리에 비하여 헤어리베치 투입구의 주1회 관개구와 유의적 차이가 없었다. 또한 헤어리베치 투입구에서 벼 수확 후 토양의 용적밀도가 감소하고 공극률이 증대하였다. 물리성 개선의 지표물질인 glomalin의 함량도 헤어리베치 투입구에서 증가하는 경향을 보였다. 따라서 헤어리베치 투입 후 주 1회만 관개하여도 토양물리성이 개선되고 보수력이 증대되어 벼 수량의 감수 없이 절수 재배가 가능하여 벼 재배 시 물 절약이 가능할 것으로 사료되었다.

• 대한지리학회지
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• 제45권1호
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• pp.49-74
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• 2010

도시는 적극적으로 온실가스배출을 저감하고 기후변화에 대한 적응전략을 구현할 수 있는 적합한 장소이다. 기존의 도시 기후변화 완화와 적응의 계획, 정책, 이행에 관한 연구를 지속가능성 과학, 세계변화 과학, 다차원 거버넌스, 구조공학의 네가지 범주로 나누어 고찰하였다. 이 네가지 학문은 관점이 서로 다르지만 모두 기후변화로 인해 야기될 수 있는 위협을 극복하는데 보편적인 주제를 공유하고 있다. 포트랜드 시의 사례연구는 도시가 현명한 성장, 국지적인 기후대응 계획, 다차원 규모의 거버넌스, 녹생성장에 기여하는 그린 인프라구조의 설치등을 통해 온실가스를 저감하고 기후변화에 능동적으로 대응할 수 있음을 제시한다. 더욱이 도시에 위치한 대학은 민간과공공부문의 다양한 조직을 연결하고, 혁신적인 연구센터와 공간적으로 명확한 그린 인프라스트럭처를 창출하며, 영향평가 방법과 캠퍼스 탄소 인벤토리를 구축하며 서비스 학습을 통해 학생과 커뮤니티를 연결하여 이러한 기후변화의 완화와 대응의 허브로서 작용할 수 있다.

• 에너지공학
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• 제29권3호
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• pp.42-49
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• 2020

Precipitated Calcium Carbonate (PCC) can be utilized in energy-effective paper production. Limestone is a raw material for synthesizing PCC. Since the PCC production yield depends on the physicochemical properties of the limestone, a basic investigation of the raw limestone is required. This study provides a brief review of the origin of limestone, limestone distribution characteristics, and limestone deposits in Korea and Vietnam. Most limestones in Korea were formed in the Paleozoic era. On the other hand, limestones in Vietnam have various ages from the Precambrian to the Triassic. Limestone is the most largely produced mineral in Korea, but Vietnam has 5 times more amount of limestone reserves than Korea.

• 한국태양에너지학회 논문집
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• 제32권4호
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• pp.34-42
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• 2012

The forecasted energy shortage tends to encourage to develop the next generation energy to countermove the energy problems and the climatic change all over the world. Korean government is pushing ahead with the policy for 'Low Carbon Green Growth' to deal with climate changes and to overcome energy problems. And many studies for low carbon green city or zero carbon city have been progressed. In this study, energy plants and energy scenarios are selected by energy supply suited features of city at city plan. The method to evaluate energy scenario can be proposed to apply various energy plants for energy demand on city planning step and evaluation method can be systematized to be used by users. Also the calculated values are changed into index for comparison according to each energy scenario.

• 에너지공학
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• 제29권3호
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• pp.57-63
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• 2020

In this paper, we reported that the global trend of cement production and utilization as raw materials and as a fuel. As we know, cement is one of the significant materials required for the construction industry. The recent trend of rising urbanization, both the cement and construction industry played a vital role. The cement industry is a major sustainable infrastructure for the countries. Currently, China producing cement half of the world's cement production. During the year 2018, Korea producing cements nearly 57.5 million metric tons. Waste materials are used as circular resources and also having tremendous benefits for cement production. Another important use of these circular resources is fuel for the cement industry. There is a large potential benefit of the cement industry, but it's creating a severe environmental threat. The cement industry contributes to the major emissions of CO2. This leads the global warming. As per the Paris agreement, the Korean government initiated the recycling policy of waste materials and also the utilization of circular resources for the prevention of limited natural resources and also the global warming effect.

• 기술사
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• 제28권4호
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• pp.14-20
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• 1995

Discourses on global environment are not only limited to the matter of simple environmen-tal protection but also going to an imperative that every country should take the environ-mental aspects into more consideration, and if necessary even proceed to modify its own strategies for economic growth. It is because scores of existing International conventions and agreements on environmental caused tend to combine the environmental issues with trade sanctions and financial assistances in order to ensure a mandatory power in pushing themselves through on a global dimension. Particularly noteworthy is the so -called Green Round(GR) which substantially associates the Issues of environmental protection with some sanctions in international trade, its rationale is quite simple. The differentiated production costs rising from the difference in environmental standards among different countries may affect national competitiveness in in-ternational trade, therefore a need does exist to countervail this difference. In reality, however, severe dissention seems to have been exposed between the developed and developing countries around this matter, because national interests and priorities in national goals considerably differ among respective countries. Greenhouse gases such as carbon dioxide which caused global warming are mostly released from the combustion of fossil fuels. The perfect removal of released $CO_{2}$ is impossible with existing technologies, and moreover, it's not payable in economical terms. Therefore it will be more effective and desirable to make more efforts to prevent the release of the $CO_{2}$ it- self through energy conservation involving the development and promotion of clean and high-efficient energy technologies and energy sources, and the development and promotion of new & renewable energy resources, and so on. One of important national tasks In our country is to establish an Energy Policy consider-ing environmental impacts since Korea depends most of its energy consumption on the fossil fuels such as oil and coal.

• 한국환경복원기술학회지
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• 제17권4호
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• pp.69-79
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• 2014

Coastal wetlands are among the most productive biomes in the Earth. The economic values include the direct use of a coastal wetland's ecosystem services, such as food, raw materials, recreation, and tourism. Other values comprise the indirect use of a coastal wetland's ecosystem services, such as carbon sequestration, waste-water treatment, and erosion prevention. In particular, Suncheon Bay is recently attracting attention as the most successful case of the preservation and restoration. This study applies Travel Cost Method (TCM) to estimate the economic value by drawing the demand curve for trips to Suncheon Bay. The TCM is an approach used for economic valuation of non-market goods and services. Based on the results of TCM, this study shows that the economic benefit from recreational uses of the site adds up to \174.7 billion per year. It is also significant in the sense that monetary information is suggested to help local policy makers evaluate the realistic values of coastal wetlands.