• 신재생에너지
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• 제17권4호
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• pp.28-35
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• 2021

It is very important to secure hydrogen acceptability to achieve the hydrogen economy. This study empirically analyzed the factors affecting acceptance by using the results of a questionnaire administered to residents of Jeonju-Wanju Hydrogen Demonstration City. The results indicated that the safety of hydrogen infrastructure and local industry and economic growth positively affected acceptance. In particular, local industry and economic growth were more effective in improving resident acceptance. As policy factors, support for government policies and disclosure of information on projects were also positive factors. As perceptual factors, the higher interest in hydrogen and less safety concerns positively affected acceptability. Therefore, as far as hydrogen safety is concerned, it seems necessary to support local industry development to improve acceptability, disclose information related to industrial development, and introduce targeted experience programs.

• 한국수소및신에너지학회논문집
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• 제20권1호
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• pp.22-30
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• 2009

Energy environment has been changing rapidly such as the fluctuation of oil prices and the effect on UNFCCC. Oil price change affects Korea's economy heavily due to her poor natural resources and large dependence of consumed energy resources. Korea takes the 4th place of importing the crude oil and 9th place in $CO_2$ emissions with the 1st place of $CO_2$ emissions increasing rate. Considering the current statue of Korea including oil price change and UNFCCC, Korea will be expected to be the Annex I nation due to Korean energy environments and the quantity of $CO_2$ emission. Energy technology development is a crucial key to cope with Korea's national energy security and environments. In this study, we establish the framework, which allocates the relative weights of assessment criteria and sub-criteria, for assessing and selecting R&D programs of energy technologies strategically. We integrated fuzzy theory and analytic hierarchy process (AHP) approach since the fuzzy AHP approach reflects the vagueness of human thoughts and perception effectively as making pairwise comparisons of criteria and alternatives. The fundamental data of this research results will support R&D planning phase for policy-makers and the production of well focused R&D outcomes.

• 해양환경안전학회지
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• 제16권3호
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• pp.313-320
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• 2010

수소에너지는 환경오염과 화석에너지 고갈에 따른 에너지 문제를 해결할 수 있는 유력한 대안으로 주목받고 있다. 수소에너지 시대 개막을 위한 준비는 아직 걸음마 단계이나 정부의 지속적이며 전폭적인 정책적 재정적 지원과 더불어 각 분야의 연구 기술개발 활성화 노력을 통해 조속한 시일 내에 실현될 것으로 예상된다. 세계 무역의 견인차 역할을 맡고 있는 선박에 수소에너지 기술을 도입하고 활용하기 위한 준비와 연구가 절실하다. 일각의 수소 연료전지선박에 관한 연구와 실증이 활발히 진행 중인 사실은 고무적이다. 이와 함께 보다 대형화되는 선박과 해상의 특수한 환경 속에서 수소에너지를 직접 이용해 항행에 필요한 동력을 얻을 수 있는 수소엔진과 같은 다양한 방법에 관한 연구도 병행되어야 할 것으로 판단된다.

• 한국수소및신에너지학회논문집
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• 제33권2호
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• pp.130-141
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• 2022

Due to continuous climate change, greenhouse gases in the atmosphere are gradually accumulating, and various extreme weather events occurring all over the world are a serious threat to human sustainability. Countries around the world are making efforts to convert energy sources from traditional fossil fuels to renewable energy. Hydrogen energy is a clean energy source that exists infinitely on Earth, and can be used in most areas that require energy, such as power generation, transportation, commerce, and household sectors. A fuel cell, a device that produces electric and thermal energy by using hydrogen energy, is a key field to respond to climate change, and major countries around the world are spurring the development of core fuel cell technology. In this paper, research trends in China, the United States, Germany, Japan, and Korea, which have the highest number of papers related to fuel cells, are analyzed through keyword network analysis.

• 에너지공학
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• 제28권3호
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• pp.10-17
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• 2019

국내 친환경 수소차 보급 정책에 따라 수소차와 수소충전소 인프라 개발에 대한 관련 업계의 연구는 활발하게 진행 중이다. 반면에 수소차와 수소충전소의 내구성 및 신뢰성에 직접적인 영향을 주는 기밀용 비금속 소재(라이너, 씰, 개스킷 등)의 위험성 평가 및 재료에 관한 실증 연구는 부족한 실정이다. 이에 본 연구에서는 FMEA를 활용하여 고압 수소 설비에 사용되는 비금속 부품의 라이너와 씰에 대한 위험요소를 도출한 후 심각도, 발생빈도, 검출도 등급을 점수로 환산하여 RPN값을 산정하였다. RPN의 최대값 600, 최소값 63, 평균값이 278.5로 산출되었으며, 라이너와 씰에 대한 주기적인 관리가 중요함을 확인하였다. 더불어 비금속 고무제품에 대한 수소침지와 산소노화시험을 통해 기초 자료로 활용 가능한 물리적 실험값을 제시하고자 하였다.

• 자원ㆍ환경경제연구
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• 제16권2호
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• pp.275-311
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• 2007

수소에너지는 비고갈성 청정에너지로 향후 탄소기반의 에너지 시스템을 대체할 에너지로 주목받고 있다. 정부의 장기적인 비전도 수소에너지의 최종에너지 수요 비중을 2040년까지 15%로 확대한다는 것이나 이를 달성하기 위해서는 200조 원이 넘는 엄청난 비용이 수반된다. 본 연구는 동태 CGE 모형을 적용하여 수소에너지 보급에 따라 한국경제에 어떤 영향을 미칠 것인지를 분석하였다. 프런티어 기술로서 수소에너지는 학습효과와 에너지원간 상보성(complementarity)의 영향으로 정부지원 없이는 2040년 기준으로 최종에너지 수요의 6.5%에 그칠 전망이나 정부가 수소에너지에 대해 각각 10%, 20%, 30%의 가격보조 정책을 실시할 경우 9.2%, 15.2%, 37.7%로 증가할 것으로 분석되었다. 즉, 정부개업을 통해 수소기술 확산 지연 현상이 크게 완화될 수 있음을 보여주는 것이다. 한편 수소기술의 주요 응용분야인 수송부문의 성장이 두드러지나 수송 연료의 대부분을 차지하는 석유가 수소에너지로 대체됨으로써 석유부문에 대한 소비가 감소하고, 발전부문의 비중도 감소하는 것으로 나타났다. 정부의 가격보조가 가계소득에서 충당되는 것으로 가정했기 때문에 가격하락에 의한 소비증가효과가 소득감소에 따른 소비감소에 의해 상쇄되면서 가계의 최종소비도 부정적 영향을 받는 것으로 분석되었다. 그러나 전반적인 생산, 투자, 수출 증가에 힘입어 GDP 수준은 소폭 성장하다가 2040년 무렵에 소폭 감소하여 경제 전반에 미치는 영향은 미미할 것으로 분석되었다.

• Nuclear Engineering and Technology
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• 제54권1호
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• pp.130-137
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• 2022

In the geological repository of radioactive nuclear waste, anaerobic corrosion can generate hydrogen, and may conservatively lead to the production of hydrogen-air layer. The accumulated hydrogen may cause a hazardous flame propagation resulting from any potential ignition sources. This study numerically investigates the processes of ignition and flame propagation in the layered mixture. Simple geometry was chosen to represent the geological repository, and reactive flow simulations were performed with different ignition power, energy, and locations. The simulation results revealed the effects of power and energy of ignition source, which were also analyzed theoretically. The mechanism of layered flame propagation was suggested, which includes three stages: propagation into the hydrogen area, downward propagation due to the product gas, and horizontal propagation along the top wall. To investigate the effect of the ignition source location, simulations with eight different positions were performed, and the boundary of hazardous ignition area was identified. The simulation results were also explained through scaling analysis. This study evaluates the potential risk of the accumulated hydrogen in geological repository, and illustrates the layered flame propagation in related ignition scenarios.

• 한국수소및신에너지학회논문집
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• 제34권5호
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• pp.389-397
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• 2023

This study compares domestic and foreign research on renewable energy-based water electrolysis clean hydrogen. Domestic studies from 2010 to 2023 focused on technological efficiency, energy efficiency, and system efficiency, with few analyzing infrastructure and technology trends. Overseas research initially focused on technological efficiency and stability, but has since shifted to economic and environmental impact, policy effectiveness, industry-university-research cooperation, and sustainability. To improve water electrolysis technology production, this study suggests prioritizing technology stability over efficiency, resolving government regulations and resident acceptance issues, promoting industry-university-institute cooperation for rapid commercialization of research results, and developing a strategy for sustainable development of renewable energy-based water electrolysis technology.

• 자동차안전학회지
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• 제6권2호
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• pp.72-77
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• 2014

In the ongoing debates over the need to identify new sources of energy and to reduce the emissions of greenhouse gases. Hydrogen has emerged as one of the most promising alternatives due to its emissions from the vehicle being virtually zero. The governments have identified the development of regulations and standards as one of the key requirements for commercialization of hydrogen-fueled vehicles. Regulations and standards will helpful in overcoming technological barriers to commercialization. Developments of a technique for safety assessment of Hydrogen Fuel Cell Vehicle(HFCV) includes four tasks, research for regulation system and policy, hydrogen safety, vehicle operation safety and protection against high-voltage. The objective is to establish a technique for safety assessment and amend safety standards for HFCV and consequently reflect research results to vehicle management policy. We devised safety standards and evaluation techniques with regard to high-pressure gas and high voltage of hydrogen fuel cell vehicle. Korean Motor Vehicle Safety Standards(KMVSS) for HFCV was amended to June 10, 2014. including the results of the safety assessment technology for high-voltage and hydrogen characteristics.

• 한국수소및신에너지학회논문집
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• 제21권6호
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• pp.595-603
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• 2010

This paper deals with an economic evaluation of domestic window type photoelectrochemical hydrogen production utilizing solar cells. We make some sensitivity analysis of hydrogen production prices by changing the values of input factors such as the initial capital cost, the solar to hydrogen conversion efficiency, and the system duration time. The hydrogen production price of the window type photoelectrochemical system was estimated as 1,168,972 won/$kgH_2$. It is expected that hydrogen production cost can be reduced to 47,601 won/$kgH_2$ if the solar to hydrogen conversion efficiency is increased to 14%, the system duration time is increased to 20,000 hours, and the initial capital cost is decreased to 25% of the current level. We also evaluate the hydrogen production cost of the water electrolysis using the electricity produced by solar cells. The corresponding hydrogen production cost was estimated as 37,838 won/$kgH_2$. The photoelectrochemical hydrogen production is evaluated as uneconomical at this time, and we need to enhance the solar to hydrogen conversion efficiency and the system duration time as well as to reduce prices of the system facilities.