• Transactions of the Korean hydrogen and new energy society
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• v.35 no.1
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• pp.1-13
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• 2024

Hydrogen is emerging as an essential material for carbon neutrality. In particular, Korea needs 22.9 million tons of imported clean hydrogen by 2050 to achieve carbon neutrality. However, a large amount of carbon is emitted during the import process, and market regulations are being discussed. This research estimates the carbon emissions of importing green hydrogen from Vietnam, Australia, and the United Arab Emirates to Korea, and calculates imported green hydrogen prices under carbon emission market regulations.

• Transactions of the Korean hydrogen and new energy society
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• v.33 no.5
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• pp.470-498
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• 2022

Recently, the world has been considering hydrogen energy as the primary energy transition means to achieve carbon neutrality by 2050. In order to achieve the goal of reducing greenhouse gas emissions, Korea is also promoting a clean hydrogen economy. However, it is necessary to introduce various clean hydrogen from overseas so that the projected demand can not meet the domestically produced. For this study, we conducted the policy comparison approach between countries other than the generally considered technical and economic approaches. The finding proposes the direction of bilateral cooperation for a strategy of securing overseas clean hydrogen from a geopolitical perspective. Germany was a target country for the policy comparison since it has a high proportion of manufacturing, like Korea, and is taking the lead in the renewable-based energy transition policy. According to the survey and analysis of the policy establishment status and new projects of the two countries, Germany is promoting bilateral international cooperation in the hydrogen area with about 33 countries based on 7 types of activities. In comparison, Korea is involved in bilateral cooperation with about 12 countries on relatively few activities. Among the types of bilateral cooperation, R&D cooperation with advanced countries for hydrogen technology was a common activity type. Germany preemptively promotes cooperation for demonstration and commercialization, considering geopolitical means and strengthening manpower training and assistance on policy and regulation to preoccupy the market for the future. Therefore, it is necessary to consider establishing a network of an entire life cycle of supply and demand network that links the future market with securing clean hydrogen considering the geopolitical distribution. To this end, Korea also needs to expand bilateral cooperation countries by activity type, and it seems necessary to seek various geopolitical-based bilateral cooperation and support measures for developing countries to diversify the supply sources of hydrogen.

• Transactions of the Korean hydrogen and new energy society
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• v.34 no.3
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• pp.235-245
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• 2023

Techno-economic analyses on a 5-MW water electrolysis system for hydrogen production, operated in Jeju Island where the portion of renewable energy in the power grid is the highest in Korea, have been performed. The cost of hydrogen production and the economic feasibility of the hydrogen production system have been mainly analyzed based on the levelized-cost-of-hydrogen model. The effects of carbon emission trading and renewable power purchase method have been considered to reduce the cost of green hydrogen production in the case studies. This economic analysis model is expected to be used to derive a business model for green hydrogen production.

• Journal of the KSME
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• v.49 no.11
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• pp.45-51
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• 2009

한국원자력연구원의 다목적 연구용 원자로, 하나로는 중성자 이용 물성 연구 등 다양한 분야에 사용되며, 중성자는 녹색기술 관련 소재의 생산과 특성 분석에 매우 유용한 도구이다. 중성자 도핑을 이용하여 생산되는 반도체는 그린 카에 사용되는 전력 소자에 활용되고 있다. 중성자 산란 실험 장치들은 이차전지 재료와 수소저장 물질의 물성 연구에 활용되고 있다. 중성자 비파괴 검사 장치는 연료전지의 성능 연구에 활용되고 있다. 고속중성자를 이용하여 스위칭 소자의 특성을 개선하는 기술과 장치가 구축되면 전력 소자의 효율 증대에 기여할 것이다.

• Bulletin of Korea Environmental Preservation Association
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• s.397
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• pp.40-43
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• 2012

현대자동차는 글로벌 환경이슈인 기후변화에 대응하기 위해 공장 부문과 본사 서비스, 판매, 연구소 등 건물부문에서 사업장 온실가스 배출량을 감축하기 위해 노력하고 있다. 한편 제품의 $CO_2$ 배출량을 줄이기 위해서는 기존 차량의 연비를 개선하는 동시에 하이브리드, 전기자동차 수소연료전지차 등 친환경 자동차를 개발하고 있다.

• Korean Journal of Poultry Science
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• v.42 no.2
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• pp.125-132
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• 2015

The Far Infrared Ray (FIR) is part of the natural energy as light spectrum of sunlight. Human can disentangle the colors within visible ray, but FIR is invisible to human sight because it has longer wavelength than visible ray. The effect of using FIR on broiler performance, blood biochemical profiles and fecal gas emission from litter. Day-old semi-broiler chicks (Ross ♂ ${\times}$ Hyline ♀) were obtained and assigned to eight pens, 2 replicates of white and green color LED light, and with FIR on each color light, in a 20L:4D of lighting program. The body weight gain and feed efficiency were tend to improve under the green color than white color, which were increased by exposing to FIR on both color light. Emission of ammonia and lower hydrocarbons from litter were not different from each color but there was a decrease by exposing to FIR regardless of light color. The level of blood aspartate aminotransferase (AST) tends to be decreased under green color than white color, and this tendency becomes more pronounced as exposing to FIR. Therefore significantly increased under white color without FIR than green color with FIR (P<0.05). The levels of albumin and immunoglobulin were not different from each color but there was an increase by exposing to FIR regardless of light color. In conclusion, exposing to Far Infrared Ray (FIR) when broiler raising, there is potential to increase broiler performance because of improvement of bioactivity and raising environment.

• Transactions of the Korean hydrogen and new energy society
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• v.33 no.2
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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.

• KSBB Journal
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• v.20 no.6
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• pp.393-400
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• 2005

Hydrogen($H_2$) as a clean, and renewable energy carrier will be served an important role in the future energy economy. Several biological $H_2$ production processes are known and currently under development, ranging from direct bio-photolysis of water by green algae, indirect bio-photolysis by cyanobacteria including the separated two stage photolysis using the combination of green algae and photosynthetic microorganisms or green algae alone, dark anaerobic fermentation by fermentative bacteria, photo-fermentation by purple bacteria, and water gas shift reaction by photosynthetic or fermentative bacteria. In this paper, biological $H_2$ production processes, that are being explored in fundamental and applied research, are reviewed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.11
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• pp.6518-6526
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• 2014

The aim of this study was to obtain a complete picture of green catalytic technology developments. The data set for analysis was collected from the data from 4,172 patents, 28,726 technical papers and 548 Government R&D projects. The covering periods were 2001 to 2012 for patents and technical papers, whereas while that for the Government R&D projects were 2001 to 2011. The analysis methodologies consisted of qualitative and quantitative approaches. The patent for catalytic technology has been increasing, even though it was developed some time ago. The increase in patents for catalytic technology has been outstanding since 2008. As a result of the analysis of patents, fuel cell comprised 41.9%, followed by coal liquefaction 23.6%. The analysis of technical papers ranked fuel cell ranked 1st, followed by hydrogen. Fuel cells, hydrogen and coal liquefaction outperformed in green catalytic technological developments. As a result of this study, it was apparently concluded that the speed for the green economy from the fossil fuel-based economy has accelerated. Therefore it will be necessary to prepare for the early realization of a green energy-based economy on a variety of aspects as soon as possible.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.152.1-152.1
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• 2011

This study analyzes transitions to a green path in transportation system in South Korea. We develop transportation system model with four new technology options, green cars; Hybrid electric vehicle, plug-in hybrid vehicle, electric vehicle and fuel cell vehicle. Among those technologies fuel cell vehicle is the best option assuming no GHG emissions when driving. We use MESSAGE model to get an optimal solution of pathway for high deployment of fuel cell vehicles under the Korea BAU transportation model. Among hydrogen production sources, off gas hydrogen is most economic since it is hardly used to other chemical sources or emits in South Korea. According to off gas hydrogen projection it can run 1.8 million fuel cell vehicles in 2040 which corresponds to 10% of all passenger cars expected in Korea in 2040. However, there are concerns associated with technology maturity, cost uncertainty which has contradictions. But clean pathway with off gas and renewable sources may provide a strong driving force for energy transition in transportation in South Korea.