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한국수소및신에너지학회> 한국수소 및 신에너지학회논문집

한국수소 및 신에너지학회논문집 update

Transactions of the Korean Hydrogen and Energy Society

  • : 한국수소및신에너지학회
  • : 공학분야  >  화학공학
  • : KCI등재
  • :
  • : 연속간행물
  • : 격월
  • : 1738-7264
  • : 2288-7407
  • : 수소에너지(~2001)→한국수소 및 신에너지학회논문집(2002~)

수록정보
31권5호(2020) |수록논문 수 : 11
간행물 제목
32권4호(2021년 08월) 수록논문
최근 권호 논문
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KCI등재

1Pressure Swing Adsorption 기반 수소정제용기 3차원 모델링 및 타당성 검증 연구

저자 : 차요한 ( Yohan Cha ) , 최재유 ( Jaeyoo Choi ) , 주현철 ( Hyunchul Ju )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 197-204 (8 pages)

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Pressure swing adsorption is a purification process which can get pure hydrogen. The purification process is composed of four process: compression, adsorption, desorption and discharge. In this study the adsorption process was simulated by using the Fluent and validated with experimental results. A gas used in experiment is composed of H2, CO2, CH4, and CO. Adsorption process conducted under 313 kelvin and 3 bar and bituminous-coal-based (BPL) activated carbon was used as the adsorbent. Langmuir model was applied to explain the gas adsorption. And diffusion of all the gases was controlled by micro-pore resistances. The result shows that, the most adsorbed gas was carbon dioxide, followed by methane and carbon monoxide. And carbon monoxide took the least amount of time to reach the maximum adsorption amount. The molar fraction of the off-gas became the same as the molar fraction of the gas supplied from the inlet after adsorption reached the equilibrium.

KCI등재

2수소 저장용 탱크의 튜브 형상에 따른 온도분포 특성에 대한 수치해석 연구

저자 : 오승준 ( Seung Jun Oh ) , 윤정환 ( Jeong Hwan Yoon ) , 전경숙 ( Kyung Sook Jeon ) , 김재규 ( Jae Kyu Kim ) , 박준홍 ( Joon Hong Park ) , 최정주 ( Jeongju Choi )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 205-211 (7 pages)

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Recently, it is necessary for study on renewable energy due to environmental pollution and fossil fuel depletion. Therefore, in this study, the filling temperature according to the nozzle geometry was evaluated based on the limit temperature specified in SAEJ2601 for charging hydrogen, a new energy. There are three types of nozzles, normal, angle and round, fixed the average pressure ramp rate at 52.5 MPa/min, and the injection temperature was set at 293.4 K. As a result, the lowest temperature distribution was found in the round type, although the final temperature did not differ significantly in the three types of nozzles. In addition, Pearson's coefficient was calculated to correlate the mass flow rate with the heat transfer rate at the inner liner wall, which resulted in a strong linear relationship of 0.98 or higher.

KCI등재

3유전 알고리즘 및 담금질 기법을 활용한 Type 4 복합재료 압력용기 최적화 프로세스

저자 : 송귀남 ( Gwinam Song ) , 김한상 ( Hansang Kim )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 212-218 (7 pages)

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In this study, we conducted a design optimization of the Type 4 composite pressure vessels to enhance the pressure-resistant performance of the vessels while keeping the thickness of the composite layer. The design variables for the optimization were the stacking angles of the helical layers of the vessels to improve the performance. Since the carbon fibers are expensive material, it is desirable to reduce the use of the carbon fibers by applying an optimal design of the composite pressure vessel. The structural analysis and optimization process for the design of Type 4 composite pressure vessels were carried out using a commercial finite element analysis software, Abaqus and a plug-in for automated simulation, Isight, respectively. The optimization results confirmed the performance and safety of the optimized Type 4 composite pressure vessels was enhanced by 12.84% compared to the initial design.

KCI등재

4Pd 분리막을 이용한 수소동위원소 회수 실험과 공정 시뮬레이션

저자 : 정우찬 ( Woo-chan Jung ) , 박종환 ( Jong-hwan Park ) , 한상우 ( Sang-woo Han ) , 장민호 ( Min-ho Jang ) , 이현곤 ( Hyeon-gon Lee )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 219-227 (9 pages)

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Hydrogen isotopes, which are used as raw materials in fusion reaction, participate in the reaction only in small amount, and most of them are released together with impurities. In order to recover and reuse only hydrogen isotopes from this exhaust gas, a recovery process is required, and most of the hydrogen isotopes can be recovered using a Pd Membrane. In this study, the recovery rate of hydrogen isotopes was measured through the first and second stage Pd membrane experiments. In the case of the experiment using a single stage Pd membrane, about 99.2%, and in the case of the first stage and second stage Pd membrane connection experiments, a recovery rate of 99.9% or more was obtained. Therefore, the recovery rate of Pd membrane process applied to hydrogen can be applied to hydrogen isotopes. In addition, the simulation model was established using aspen custom modeler, a commercial software, and the validity of the simulation was checked by applying the references and experimental data. The simulation results based on the experimental data showed a difference of 2% or less.

KCI등재

5FEM과 CFD 연동을 통한 스택 체결 시 압력에 의해 변형된 단위 전지 해석

저자 : 유빈 ( Bin Yoo ) , 임기성 ( Kisung Lim ) , 주현철 ( Hyunchul Ju )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 228-235 (8 pages)

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Polymer electrolyte membrane fuel cells (PEMFC) are currently being used in various transport applications such as drones, unmanned aerial vehicles, and automobiles. The power required is different according to the type of use, purpose, and the conditions adjusted using a cell stack. The fuel cell stack is compressed to reduce the size and prevent fuel leakage. The unit cells that make up the cell stack are subjected to compression by clamping force, which makes geometrical changes in the porous media and it impacts on cell performance. In this study, finite elements method (FEM) and computational fluid dynamics (CFD) analysis for the deformed unit cell considering the effects of clamping force is performed. First, structural analysis using the FEM technique over the deformed gas diffusion layer (GDL) considering compression is carried out, and the resulting porosity changed in the GDL is calculated. The PEMFC model is then verified by a three-dimensional, two-phase fuel cell simulation applying the physical properties and geometry obtained before and after compression. The detailed simulation results showed different concentration distributions of fuel between the original and deformed geometry, resulting in the difference in the distribution of current density is represented at compressed GDL region with low oxygen concentration.

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6상용차용 고분자 전해질 연료전지 냉각시스템 배열에 따른 성능 특성

저자 : 우종빈 ( Jongbin Woo ) , 김영현 ( Younghyeon Kim ) , 유상석 ( Sangseok Yu )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 236-244 (9 pages)

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Fuel cell systems for medium duty truck require high power demands under driving. Since high power demands results in significant heat generation, thermal management is crucial for the performance and durability of medium duty truck. Therefore, various configurations of dual stacks with cooling systems are investigated to understand appropriate thermal management conditions. The simulation model consists of a dynamic fuel cell stack model, a cooling system model equipped with a controller, and the mounted controller applies a feedback controller to control the operating temperature. Also, In order to minimize parasitic power, the comparison of the cooling systems involved in the arrangement was divided into three case. As a result, this study compares the reaction of fuel cells to the placement of the cooling system under a variety of load conditions to find the best placement method.

KCI등재

7건물용 고분자 전해질 연료전지 금속분리판 유동장 형상 변화에 따른 산소 확산 특성에 대한 연구

저자 : 박동환 ( Donghwan Park ) , 손영준 ( Young-jun Sohn ) , 최윤영 ( Yoon-young Choi ) , 김민진 ( Minjin Kim ) , 홍종섭 ( Jongsup Hong )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 245-255 (11 pages)

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Various studies about metallic bipolar plates have been conducted to improve fuel cell performance through flow field design optimization. These research works have been mainly focused on fuel cells for vehicle, but not fuel cells for building. In order to reduce the price and volume of fuel cell stacks for building, it is necessary to apply a metallic flow field, In this study, for a metallic flow field applied to a fuel cell for building, the effect of a change in the flow field shape on the performance of a polymer electrolyte membrane fuel cell was confirmed using a model and experiments with a down-sizing single cell. As a result, the flow field using a metal foam outperforms the channel type flow field because it has higher internal differential pressure and higher reactants velocity in gas diffusion layer, resulting in higher water removal and higher oxygen concentration in the catalyst layer than the channel type flow field. This study is expected to contribute to providing basic data for selecting the optimal flow field for the full stack of polymer electrolyte membrane fuel cells for buildings.

KCI등재

8오존, 암모니아 순차적 처리를 통한 바나듐 레독스 흐름 전지용 활성화 카본 펠트 전극 개발

저자 : 최한솔 ( Hansol Choi ) , 김한성 ( Hansung Kim )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 256-262 (7 pages)

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A carbon felt electrode was prepared using ozone and ammonia sequential treatment and applied as an electrode for a vanadium redox flow battery (VRFB). The physical and electrochemical analyses demonstrate that the oxygen groups facilitate nitrogen doping in the carbon felt. Carbon felt (J5O3+NH3), which was subjected to ammonia heat treatment after ozone treatment, showed higher oxygen and nitrogen contents than carbon felt (J5NH3+O3), which was subjected to ammonia heat treatment first and then ozone treatment. From the charging/discharging of VRFB, the J5O3+NH3 carbon felt electrode showed 14.4 Ah/L discharge capacity at a current density of 150 mA /㎠, which was 15% and 33% higher than that of J5NH3+O3 and non-activated carbon felt (J5), respectively. These results show that ozone and ammonia sequential treatment is an effective carbon felt activation method to increase the performance of the vanadium redox flow battery.

KCI등재

9전기차 사용 후 배터리 재사용 산업 육성을 위한 정책 제안

저자 : 이희동 ( Hee Dong Lee ) , 임옥택 ( Ock Taeck Lim )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 263-270 (8 pages)

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In this study, we proposed the necessity of reusing the battery industry after domestic use, preparing legal arrangements by step for recycling, clarifying responsible materials by processing stage, and establishing infrastructure and screening diagnostic rating system. The purpose of this study is to establish a life cycle integrated management system for electric vehicle batteries and to find suitable ways for improving the lifespan of electric vehicle batteries, reuse, and recycling in stages to avoid other environmental pollution problems due to batteries after using electric vehicles used to reduce environmental pollution due to climate change.

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10소형 전기 상용차산업의 아세안 지역 적용 연구

저자 : 임재완 ( Jae Wan Lim ) , 원장혁 ( Jang Hyeok Won ) , 이춘범 ( Chun Beom Lee ) , 임옥택 ( Ock Taeck Lim )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 32권 4호 발행 연도 : 2021 페이지 : pp. 271-276 (6 pages)

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Although the development of electric vehicles or electric commercial vehicles is underway in Korea, most companies are seeking to enter the global market because it is difficult to expand their business only in the domestic market. In addition, it is recognized that the country has difficulties in responding to regulations or related procedures when entering overseas markets, and due to such difficulties, it is not possible to gain opportunities to enter the market and gain the technical advantage. Therefore, it is necessary to support individual companies to overcome the difficulties of promoting and exporting products by establishing a pre-cycle support environment for technology development so that development parts can be installed in small electric commercial vehicles. Therefore, this study tried to understand the necessity and factors of small electric commercial vehicles for major ASEAN countries, and as a result, most of them raised the urgency and necessity of joint research.In addition, human resource development, government support, and technical support were suggested as the necessary factors for the study.

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KCI등재

1가스정압관리소 기반의 복합에너지허브 기본설계

저자 : 박소진 ( Sojin Park ) , 김형태 ( Hyoungtae Kim ) , 김진욱 ( Jinwook Kim ) , 강일오 ( Il-oh Kang ) , 유현석 ( Hyunsuk Yoo ) , 최경식 ( Kyoungshik Choi )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 405-410 (6 pages)

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In this literature, we are introduce a basic design of multi energy hub based on natural gas governor station. Multi energy hub consists of turbo expender generator, phosphoric acid fuel cell, pressure swing adsorption, H2 charging station, utilities and etc. We design a hybrid energy hub system that provides energy using these complex energies, and calculates the amount of electricity that can be produced and the amount of hydrogen charged through the process analysis. TEG and phosphoric acid fuel cell produce 2,290 to 2,380 kW and can supply electricity to 500 houses. In addition, By-product H2 gas is refined to H2 vehicle fuel. This will help maximize the balance of energy demand and supply and improve national energy efficiency by integrating unused decompression energy power generation technology and various power generation/heat source technologies.

KCI등재

2고압형 메탄올 수증기 개질기 압력용기의 내부 유동 개선을 위한 전산 해석

저자 : 유동진 ( Dongjin Yu ) , 지현진 ( Hyunjin Ji ) , 유상석 ( Sangseok Yu )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 411-418 (8 pages)

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A reformer is a device for producing hydrogen used in fuel cells. Among them, methanol steam reformer uses methanol as fuel, which is present as a liquid at room temperature. It has the advantage of low operating temperature, high energy density, and high hydrogen production. The purpose of this study is to improve the internal flow of the pressure vessel when a bundle of methanol steam reformer in the pressure vessel goes out to a single outlet. An analysis of equilibrium reaction to methanol steam reforming reaction was conducted using Aspen HYSYS® (Aspen Technology Inc., Bedford, USA), and based on the results, computational analysis was conducted using ANSYS Fluent® (ANSYS, Inc., Canonsburg, USA). For comparison of the results, the height of the pressure vessel, outlet diameter, and fillet was set as variables, and the optimum geometry was selected by comparing the effects of gravity and the amount of negative pressure.

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3활성탄 담지 몰리브덴 촉매를 이용한 합성가스 직접 메탄화 반응

저자 : 김성수 ( Seong-soo Kim ) , 이승재 ( Seung-jae Lee ) , 박성열 ( Sung-youl Park ) , 김진걸 ( Jin-gul Kim )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 419-428 (10 pages)

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The kinetics of direct methanation over activated charcoal-supported molybdenum catalyst at 30 bar was studied in a cylindrical fixed-bed reactor. When the temperature was not higher than 400℃, the CO conversion increased with increasing temperature according to the Arrhenius law of reaction kinetics. While XRD and Raman analysis showed that Mo was present as Mo oxides after reduction or methanation, TEM and XPS analysis showed that Mo2C was formed after methanation depending on the loading of Mo precursor. When the temperature was as high as 500℃, the CO conversion was dependent not only on the Arrhenius law but also on the catalyzed reaction by nanoparticles, which came off from the reactor and thermocouple by metal dusting. These nanoparticles were made of Ni, Fe, Cr and alloy, and attributed to the formation of carbon deposit on the wall of the reactor and on the surface of the thermocouple. The carbon deposit consisted of amorphous and disordered carbon filaments.

KCI등재

4냉동능력 2 kW 급 역브레이튼 극저온 냉각시스템 성능시험

저자 : 고준석 ( Junseok Ko ) , 이근태 ( Keun-tae Lee ) , 박성제 ( Seong-je Park ) , 김종우 ( Jongwoo Kim ) , 추상윤 ( Sangyoon Choo ) , 홍용주 ( Yong-ju Hong ) , 인세환 ( Sehwan In ) , 박지호 ( Jiho Park ) , 김효봉 ( Hyobong Kim ) , 염한길 ( Hankil Yeom )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 429-435 (7 pages)

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This paper describes the experimental study of reverse-Brayton refrigeration system for application to high temperature superconductivity electric devices and LNG re-liquefaction. The reverse-Brayton refrigeration cycle is designed with operating pressure of 0.5 and 1.0 MPa, cooling capacity of 2 kW at 77 K, and neon as a working fluid. The refrigeration system is developed with multi scroll compressor, turbo expander and plate heat exchanger. From experiments, the performance characteristics of used components is measured and discussed for 77-120 K of operating temperature. The developed refrigeration system shows the cooling capacity of 1.23 kW at 77 K and 1.64 kW at 110 K.

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5심층 신경망 기법을 이용한 고체 산화물 연료전지 스택의 성능 예측 모델

저자 : 이재윤 ( Jaeyoon Lee ) , 이스라엘또레스삐네다 ( Israel Torres Pineda ) , 잡반티엔 ( Van-tien Giap ) , 이동근 ( Dongkeun Lee ) , 김영상 ( Young Sang Kim ) , 안국영 ( Kook Young Ahn ) , 이영덕 ( Young Duk Lee )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 436-443 (8 pages)

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The performance prediction model of a solid oxide fuel cell stack has been developed using deep neural network technique, one of the machine learning methods. The machine learning has been received much interest in various fields, including energy system mo- deling. Using machine learning technique can save time and cost requried in developing an energy system model being compared to the conventional method, that is a combination of a mathematical modeling and an experimental validation. Results reveal that the mean average percent error, root mean square error, and coefficient of determination (R2) range 1.7515, 0.1342, 0.8597, repectively, in maximum. To improve the predictability of the model, the pre-processing is effective and interpolative machine learning and application is more accurate than the extrapolative cases.

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6우주탐사용 직접 수소화붕소나트륨/과산화수소 연료전지의 환원극 촉매

저자 : 유수상 ( Su Sang Yu ) , 오택현 ( Taek Hyun Oh )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 444-452 (9 pages)

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This study investigated the cathode catalyst of direct borohydride/ hydrogen peroxide fuel cells for space exploration. Various catalysts such as Au, Ag, and Ni were supported on multiwalled carbon nanotubes (MWCNTs). Various techniques, such as transmission electron microscopy, Brunauer-Emmett- Teller method, scanning electron microscopy, and X-ray diffraction were conducted to investigate the characteristics of the catalysts. Fuel cell tests were performed to evaluate the performance of the catalysts. Ag/MWCNTs exhibited better catalytic activity than the Ni/MWCNTs and better catalytic selectivity of the Au/MWCNTs. Ag/MWCNTs presented good catalytic activity and selectivity even at an elevated operating temperature. The performance of Ag/MWCNTs was also stable for up to 60 minutes.

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7수소전기차용 EPDM 고무의 충전재 입자 크기별 고압 수소 환경에서의 거동 연구

저자 : 김기정 ( Keejung Kim ) , 전형렬 ( Hyeong-ryeol Jeon ) , 강영임 ( Young-im Kang ) , 김완진 ( Wanjin Kim ) , 염지웅 ( Jiwoong Yeom ) , 최성준 ( Sung-joon Choi ) , 조성민 ( Sungmin Cho )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 453-458 (6 pages)

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In this study, ethylene-propylene-diene monomer (EPDM) rubbers reinforced with various particle size of carbon black were prepared and tested. We followed recently published CSA/ANSI CHMC2 standard “the test methods for evaluating material compatibility in compressed hydrogen applications-polyemr”. Measurement of change in hardness, tensile strength and volume were performed after exposure to maximum operating pressure, 87.5 MPa, for 168 hours (1 week). Once EPDM was exposed to high-pressure hydrogen, the samples experience volume increase and degradation of the physical properties. Also, after the dissolved hydrogen was fully eliminated from the specimens, the hardness and the tensile properties were not recovered. The rubber reinforced with smaller sizes of carbon black particles showed less volume expansion and decrease of physical properties. As a result, smaller particle size of carbon black filler led to more resistance to high-pressure hydrogen.

KCI등재

8정량적 위험성평가 프로그램(Hy-KoRAM)을 이용한 제조식 수소충전소 피해범위 및 영향 분석

저자 : 김혜림 ( Hyelim Kim ) , 강승규 ( Seungkyu Kang )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 459-466 (8 pages)

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As the hydrogen industry grows, expansion of infrastructure for hydrogen supply is required, but the safety of hydrogen facilities is concerned due to the recent accidents at the Gangneung hydrogen tank and the Norwegian hydrogen fueling station. In this study, the damage range and impact analysis on the on-site hydrogen fueling station was conducted using Hy-KoRAM. This is a domestically developed program that adds functions based on HyRAM. Through this risk assessment, it was evaluated whether the on-site hydrogen fueling station meets international standards and suggested ways to improve safety.

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9대향류 화염에서의 합성가스 내 수소 함량에 따른 연소 특성 변화에 관한 수치해석 연구

저자 : 김동희 ( Donghee Kim ) , 박진제 ( Jinje Park ) , 허강열 ( Kang Y Huh ) , 이영재 ( Youngjae Lee )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 467-479 (13 pages)

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Various researches are being conducted to reduce greenhouse gases generated by the consumption of traditional energy resources. This study was conducted to numerically analyze the combustion characteristics and N-S reaction behavior with respect to the H2 content of syngas composed of CO and H2 in pressurized air combustion. A non-premixed opposed flow flame model was applied a modified detailed mechanism with S-chemistry was developed based on GRI 3.0 to simulate the syngas reaction. As the hydrogen content increased, the flame thickness increased due to the fast reactivity of hydrogen. In the rich region, NO and SO2 were reduced by reaction with H radical and H bonding of NO was suppressed by the formation of HOSO.

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10반도체 칩 테스트용 챔버 형상에 따른 유동 균일성에 대한 수치적 연구

저자 : 이대규 ( Daegyu Lee ) , 마상범 ( Sang-bum Ma ) , 김성 ( Sung Kim ) , 김정열 ( Jeong-yeol Kim ) , 강채동 ( Chaedong Kang ) , 김진혁 ( Jin-hyuk Kim )

발행기관 : 한국수소및신에너지학회 간행물 : 한국수소 및 신에너지학회논문집 31권 5호 발행 연도 : 2020 페이지 : pp. 480-488 (9 pages)

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This study was conducted to improve the flow uniformity inside the chip tester through changing the flow path formation according to the inlet and outlet position of chamber. The internal flow and velocity distributions of the modified chamber models (Cases 1-3) were compared with the reference chamber model through three-dimensional Reynolds-averaged Navier-Stokes equations with k-ε turbulence model. The modified chamber models showed the superior flow uniformity characteristics compared to the reference chamber model. To investigate the flow uniformity in the chip tester, the standard deviation of the velocity was defined and compared. Through the internal flow analysis and assesment of the standard deviation, Case 2 among the test cases including the reference model showed the best flow uniformity generally.

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