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Whilst vehicle-to-every (V2X) is still at a research and development phase, we are nearing the point when this technology could begin to enter in commercial mass markets. However, this transition is unlikely to happen until a number of issues have been resolved which currently hinder the developing of V2X technology and its capacity to provide value to end-users and other actors. This roadmap has set out plan for how these issues may be overcome, based on eight key goals that the automotive industry, network operators and policy makers should aim to achieve. Suggestions for near-term activities that may be carried out towards meeting these goals have also been identified.
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저자 : 박민주 ( Min-ju Park ) , 김학민 ( Hak-min Kim ) , 구윤정 ( Yun-jeong Gu ) , 정창훈 ( Chang-hoon Jeong ) , 강부민 ( Boo Min Kang ) , 하승우 ( Seung Woo Ha ) , 정대운 ( Dae-woon Jeong )
발행기관 : 한국수소및신에너지학회(구 한국수소에너지학회)
간행물 :
한국수소 및 신에너지학회논문집
31권 6호
발행 연도 : 2020
페이지 : pp. 509-521 (13 pages)
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This study aims to propose a mid- to long-term fostering plan for the hydrogen industry customized to Changwon City by reviewing the government's policy and the status of the domestic and foreign hydrogen industry. The adopted methodologies were policy analysis, literature review, field investigation, and committee operation that could consider institutions, knowledge (technology), and networking between activity subjects. The short-term projects and long-term projects for the fostering plan are established using these methodologies. The short-term projects were structured so that the ongoing hydrogen industry fostering plan leads to a successful result, and the hydrogen mobility field is expanded to not only land vehicles but also marine and air vehicles. The long-term projects consist of a high proportion of the hydrogen utilization field to take advantage of the industrial strength of Changwon City, and a support system for new and turning companies for localization of parts was added to provide industrial competitiveness.
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This study evaluated the effect of improving the atmospheric environment based on the premise that the supply of hydrogen fuel cell vehicles (HFCV) will be achieved as many as the number of vehicles presented in the hydrogen economy activation roadmap announced by the Korean government in January 2019. The HFCV supply target (2.7 million passenger cars) suggested in the hydrogen economy revitalization roadmap was logically allocated to the five major metropolitan areas in Korea. Air pollution damage costs by region were calculated by reflecting the basic unit of damage cost to the estimated air pollutant emissions. As a result, it was confirmed that the benefits per unit of some cities in Gyeonggi-do were derived more than major cities in the metropolitan area.
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This paper reviews and summarizes the fuel-cell-related studies those have been recently published in major Korean Citation Index journals, aiming at analyzing the research trend in fuel cell technologies. Six major journals are selected for the literature survey; 57 papers are chosen for the detailed analysis through a screening examination on the total 1,040 papers published during between 2018 and 2020. Papers are classified into six technical categories, such as i) electrode, ii) electrolyte, iii) bipolar plate and stack, iv) fuel cell system, v) balance of plant, and vi) diagnosis-related studies, and summarized by the experts in the relevant area. Through this paper, we provide a comprehensive review on the recent trends and progress in fuel-cell-related research work in Korea.
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In this study, optimization research was conducted through statistical analysis with the aim of maximizing the efficiency of organic matter reduction and hydrogen production by applying electrolysis process at sewage treatment plant. Statistical analysis and optimal operating conditions of organic matter removal efficiency and H2 generation, which varied with various conditions in the electrolysis process, were derived using response surface methodology. As a result, 1,268 μS/cm of conductivity, 350 A current, and pH 3.2 was found to be the optimum condition to reach the desired value as 38% of organic matter reduction and 2.58 L/min of H2 production. The experiment also determined that the optimization study was reliable. Base on this study, it was confirmed that the removal of organic matter and hydrogen production could be stably by applying the electrolysis process in the sewage treatment plant.
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It is possible that hydrogen could replace coal and petroleum as the predominant energy source in the near future, but several challenges including cost, efficiency, and stability. Mg and Mg alloys are attractive hydrogen storage materials because of their lightweight and high absorption capacity. Their range of applications could be further extended if their hydrogenation properties could be improved. The main emphasis of this study was to investigate their hydrogenation properties for Synthesis of 10wt.% CaF2 in Mg2NiHx systems. The effect of BCR (66:1) and MA time (96 hours) on the hydrogenation properties of the composite was investigated. also, Mg2NiHx-10wt% CaF2 composites prepared by Mechanical Alloying are used in this work to illustrate the effect of catalysts on activation energy and kinetics of Magnesium hydride.
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저자 : 김무선 ( Moo-sun Kim ) , 류준형 ( Joon-hyoung Ryu ) , 정수연 ( Su Yeon Jung ) , 이성우 ( Seong Woo Lee ) , 최성웅 ( Sung Woong Choi )
발행기관 : 한국수소및신에너지학회(구 한국수소에너지학회)
간행물 :
한국수소 및 신에너지학회논문집
31권 6호
발행 연도 : 2020
페이지 : pp. 558-563 (6 pages)
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Hydrogen is attracting attention as an alternative energy source as an eco-friendly fuel without emitting environmental pollutants. In order to use hydrogen as an energy source, technologies such as hydrogen production and storage must be used, and new storage methods are being studied. In this study, the behavior of hydrogen in the storage tank were numerically studied under high-pressure hydrogen discharge conditions in a Type III hydrogen tank. Numerical results were compared with the experimental value and the results were quantitatively analyzed to verify the numerical implementation. With the results of pressure and temperature values under a given discharge condition, the Redich-Kwong gas model showed the adequate models with the smallest error between numerical and experimental results.
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저자 : 이평종 ( Pyoungjong Lee ) , 김종원 ( Jongwon Kim ) , 배기광 ( Kikwang Bae ) , 정성욱 ( Seonguk Jeong ) , 강경수 ( Kyoungsoo Kang ) , 정광진 ( Kwangjin Jung ) , 박주식 ( Chusik Park ) , 김영호 ( Youngho Kim )
발행기관 : 한국수소및신에너지학회(구 한국수소에너지학회)
간행물 :
한국수소 및 신에너지학회논문집
31권 6호
발행 연도 : 2020
페이지 : pp. 564-570 (7 pages)
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Metal hydride is suitable for safe storage of hydrogen. The hydrogen storage kinetics of the metal hydride are highly dependent on its heat transfer characteristics. This study presents a metal hydride-expended graphite composite with improved thermal conductivity and its hydrogen storage kinetics. To improve the heat transfer characteristics, a metal hydride was mixed and compacted with a high thermal conductivity additive. As the hydrogen storage material, AB5 type metal hydride La0.9Ce0.1Ni5 was used. As an additive, flakes-type expended graphite was used. With improved heat transfer characteristics, the metal hydride-expended graphite composite stores hydrogen four times faster than metal hydride powder.
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저자 : 김효봉 ( Hyobong Kim ) , 홍용주 ( Yong-ju Hong ) , 염한길 ( Hankil Yeom ) , 박지호 ( Jiho Park ) , 고준석 ( Junseok Ko ) , 박성제 ( Seong-je Park ) , 인세환 ( Sehwan In )
발행기관 : 한국수소및신에너지학회(구 한국수소에너지학회)
간행물 :
한국수소 및 신에너지학회논문집
31권 6호
발행 연도 : 2020
페이지 : pp. 571-577 (7 pages)
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Thermal analysis was performed for a cold box of a hydrogen liquefaction pilot plant with 0.5 ton/day capacity. The pilot plant has adopted a hydrogen liquefaction process using two-stage helium Brayton cycle with precooling of liquid nitrogen. The cold box for hydrogen liquefaction has generally vacuum insulation but inevitable heat invasion by conduction and radiation exists. The heat loads were calculated for cold box internals according to multilayer insulation emissivity. Total heat load of 181.7 W is estimated for emissivity of 0.03 considered in field condition.
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There is growing interest worldwide in a hydrogen economy that uses hydrogen as an energy medium instead of hydrocarbon-based fossil fuels as a way to combat climate change. Since hydrogen has a very low energy density per unit volume at room temperature, hydrogen must be compressed and stored in order to use as an energy carrier. There are mechanical and non-mechanical methods for compressing hydrogen. The mechanical method has disadvantages such as high energy consumption, durability problems of moving parts, hydrogen contamination by lubricants, and noise. Among the non-mechanical compression methods, electrochemical compression consumes less energy and can compress hydrogen with high purity. In this paper, research trends are reviewed, focusing on research papers on electrochemical hydrogen compression technology, and future research directions are suggested.
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