• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2010년도 제35회 추계학술대회논문집
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• pp.353-358
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• 2010

High pressure gas is a widely used storage mode for hydrogen fuel. A typical hydrogen tank that is charged with hydrogen gas can function as a hydrogen supply source in a large number of applications. The filling process of a high-pressure hydrogen tank should be reasonably short. However, when the fill time is short, the maximum temperature in the tank increases. Therefore the process should be designed in such a way to avoid high temperatures in the tank because of safety reasons. The paper simulates the fast filling process of hydrogen tanks using Computational Fluid Dynamics method. The local temperature distribution in the tank is obtained. Results obtained are compared with available experimental data. Further work is going on to improve the accuracy of the calculations.

• 한국가스학회지
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• 제27권1호
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• pp.38-47
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• 2023

수소연료전지 차량 충전 과정에서, 충전소에서의 공급압력과 차량 내 저장 탱크의 압력 차이에 의해 수소가 흐르게 되고 유량은 압력 차에 의존한다. 따라서 충전 과정에서 발생하는 수소의 압력강하에 대한 고려는 필수적이며 이의 분석을 통해 수소 충전 과정의 효율성을 높일 수 있다. 본 연구에서는 충전라인 중 호스, 노즐/리셉터클, 파이프, 밸브에 대하여 압력강하를 분석하였다. 호스와 파이프는 도관에서의 압력강하로, 노즐/리셉터클은 흐름 노즐 식으로, 밸브는 기체 유량 식으로 계산하였다. 또한 각 구성요소에서 발생하는 압력강하 효과를 종합 분석한 결과 전체 충전라인에서 압력강하에 가장 큰 영향을 주는 요소는 밸브에서의 압력강하임이 밝혀졌다. 이번 연구는 추후 수소 충전을 포함한 수소 유동 해석으로 수소 충전 과정의 모델 개발에 활용될 수 있을 것이다.

• 한국수소및신에너지학회논문집
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• 제28권6호
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• pp.635-641
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• 2017

In this study, the components of packaged hydrogen filling station were analyzed and risk factors were examined. Risk scenarios were constructed and quantitative risk assessments were conducted through a general risk assessment program (phast/safeti 7.2). Through the risk assessment, the range of damage according to accident scenarios and the ranking that affects the damage according to the risk factors are listed, and scope of damage and countermeasures for risk reduction are provided. The quantitative risk assessment result of the packaged hydrogen filling station through this task will be used as the basic data for improving the safety of the packaged filling system and preparing safety standards.

• 한국수소및신에너지학회논문집
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• 제28권6호
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• pp.642-648
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• 2017

The use of fossil is causing enviromental all over the world. So hydrogen energy is attracting attention as one of the alternative. The government announced that 30% of the air pollution is because of the Internal Combustion Engine Vehicle. In addition, they plans to reduce Internal Combustion Engine Vehicles by 2030 and increase (electric vehicles, EV) or (fuel cell vehicle, FCV). The FCV is evaluated as a next-generation green car because it has a long driving distance and short charging time. However, the hydrogen industry is not able to expand due to the lack of refueling infrastrucutre. This paper predicts the site of hydrogen refueling stations for the expansion of the hydrogen industry and proposes a method to supply hydrogen multi energy filling stations.

• 한국수소및신에너지학회논문집
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• 제32권3호
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• pp.189-195
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• 2021

A compressed hydrogen tank is to be repressurized to 40 bar by being connected to a high-pressure line containing hydrogen at 50 bar and 25℃. Hydrogen filling time and the corresponding hydrogen temperature has been estimated when the filling process stopped according to several thermodynamic models. During the process of cooling the hydrogen tank, hydrogen temperature and pressure vs. time estimation was performed using Aspen Dynamics. Filling time, hydrogen temperature after filling hydrogen gas, cooling time and the final tank pressure after tank filling process have been completed according to the thermodynamic models are almost same.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.644-647
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• 2009

In this paper, the study is researched for related safety standards having experiments concerning temperature changes in type IV cylinder of the Hydrogen fuel cell vehicle. Experiments were performed to acquire temperature data of type IV cylinder according to filling time. The experimental results are shown that internal temperatures of type Ⅳ vessel are over $85^{\circ}C$ at all measured points after 5 minutes at filling 35 MPa and the highest temperature is getting lower when the residual gases are more remained. Consequently, the safety standards need properly limited value through further study for filling flow rate and filling time.

• 대한기계학회논문집A
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• 제35권7호
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• pp.813-819
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• 2011

본 연구에서는 연료전지자동차의 초경량 복합재료 수소 탱크에 대한 수소 충전 특성을 파악하고, 충전 조건에 따른 수소 탱크의 안전성을 확인하기 위해 플라스틱 라이너를 사용하는 Type 4 수소 탱크와 알루미늄 라이너를 사용하는 Type 3 수소 탱크에 대해 수소 충전 시, 수소 탱크 내부의 가스 온도 및 압력 변화, 라이너 및 복합재료 층의 온도 변화 등을 측정하여 그 특성을 고찰하였다. 그 결과 충전 속도가 증가함에 따라 탱크 내부 가스의 온도가 증가하였고, 탱크 내부 가스의 온도 분포가 다르게 나타났다.

• 한국수소및신에너지학회논문집
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• 제34권6호
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• pp.608-614
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• 2023

The fast filling process of high-pressure hydrogen has an important impact on the filling efficiency and safety. In this paper, a specific study is carried out on the thermophysical phenomena during the fast filling process. Starting from the gas state equation of hydrogen, the change law of the hydrogen storage temperature is obtained, and then the temperature rise prediction is constructed. The model can clarify the relationship between the filling parameters and the temperature rise during the fast filling process, thereby revealing the flow and heat transfer laws of the fast charging process. To improve the theoretical research basis for the evaluation of vehicle-mounted hydrogen fast charging capacity, temperature prediction and optimization of hydrogenation methods.

• 한국가스학회지
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• 제25권4호
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• pp.57-62
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• 2021

본 연구는 국제공동 연구로 개발 된 HyKoRAM 프로그램을 이용하여 저장설비(튜브트레일러)의 누출 시 위험성평가를 진행하였다. 수소충전소 내의 고압가스설비는 크게 4가지로 저장설비(튜브트레일러), 처리설비(압축기), 압축가스설비, 충전설비(디스펜서)로 분류된다. 그 중 저장설비인 튜브트레일러의 설계 사양, 주변 환경 조건 등을 반영하여 기존에 발생된 사고 및 잠재적 사고 위험 사고 시나리오를 구성하였다. 이를 통해, 수소충전소 저장 설비의 위험을 확인하고 수소충전소 안전성 향상을 위한 대책을 제안한다.

• 대한안전경영과학회지
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• 제14권1호
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• pp.95-100
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• 2012

This study is about the qualitative safety assessment for hydrogen gas filling facilities in Korea operating with one-bank type. The purpose of this safety assessment is about the development of components for design, fabrication, assembly, operability of dispenser and systems of the safety. For the qualitative safety assessment method, the study used FMEA(failure mode & effect analysis) and HAZOP(hazard & operability). This study evaluated the safety through FMEA and HAZOP then by referring to P&ID and PFD of hydrogen dispenser, thereby examining the dangerousness of the equipments, defects of the structure and problems of the operation.