• Title/Summary/Keyword: Hydrogen storage vessel

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Feasibility Study of Embedded FBG Sensors for the Smart Monitoring of High Pressure Composite Vessel (복합재 고압용기의 스마트 모니터링을 위한 FBG 센서의 삽입 적용성에 관한 연구)

  • Park, Sang-Wuk;Park, Sang-Oh;Kim, Chun-Gon
    • Proceedings of the Korean Society For Composite Materials Conference
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    • 2005.04a
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    • pp.33-36
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    • 2005
  • In this research, for the smart health monitoring of the hydrogen storage high pressure composite vessel, the feasibility study of an embedded fiber Bragg grating(FBG) sensor is carried out. To verify strain measurement in various temperature environment which is needed for the hydrogen pressure vessel, tensile test of a composite specimen with both an embedded FBG sensor and a strain gauge is made in low temperature. Before we try a real-size hydrogen storage pressure vessel, a small & cheap composite pressure vessel having the same structure is fabricated with embedded FBG sensors and tested. In the case of an aluminum liner inside the vessel, survivability of FBG sensors at the interface is lower than the other areas.

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A Numerical Analysis on the Stress Behavior Characteristics of a Pressure Vessel for Hydrogen Filling by FEM (유한요소법을 이용한 수소충전용 압력용기의 응력 거동특성에 관한 수치적 연구)

  • Chol, Seunghyun;Byonl, Sung Kwang;Kim, Yun Tae;Choi, Ha Young
    • Journal of the Korean Institute of Gas
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    • v.26 no.3
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    • pp.38-44
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    • 2022
  • As the supply of hydrogen charging stations for hydrogen supply accelerates due to the hydrogen economy revitalization policy, the risk of accidents is also increasing. Since most hydrogen explosion accidents lead to major accidents, it is very important to secure safety when using hydrogen energy. In order to utilize hydrogen energy, it is essential to secure the safety of hydrogen storage containers used for production, storage, and transportation of liquid hydrogen. In this paper, in order to evaluate the structural safety of a hydrogen-filled pressure vessel, the behavioral characteristics of gas pressure were analyzed by finite element analysis. SA-372 Grade J / Class 70 was used for the material of the pressure vessel, and a hexahedral mesh was applied in the analysis model considering only the 1/4 shape because the pressure vessel is axisymmetric. A finite element analysis was performed at the maximum pressure using a hydrogen gas pressure vessel, and the von Mises stress, deformation, and strain energy density of the vessel were observed.

Behavior characteristics of hydrogen storage vessel(TYPE 1) under gas pressure and temperature conditions using FEM (유한요소법을 이용한 수소저장용기 TYPE 1의 압력과 온도조건에 의한 거동특성 연구)

  • Cho, Seunghyun;Kim, Young Gyu;Ko, Young Bae;Lee, Il Kwon
    • Journal of the Korean Institute of Gas
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    • v.24 no.6
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    • pp.61-69
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    • 2020
  • This paper is a study of the behavior characteristics that occur in the hydrogen storage vessel TYPE 1 according to pressure and temperature conditions by FEM(Finite element method). Von Mises stress (VMS) generated at the highest pressure was compared with Yield strength (YS) of the material for structural safety assessment of the container, and the results of plastic strain energy density (PSED) were analyzed as basic data for life expectancy. According to the analysis results, the safety of the hydrogen gas storage vessel is not ensured due to the occurrence of VMS higher than the yield strength on the bottom of the storage container at a gas pressure of 40 Mpa or higher. In addition, the results of VMS caused by temperature conditions are very low and the behavior by temperature can be ignored. The maximum pressure of VMS/YS below 1 is calculated to be about 30 Mpa, indicating that the hydrogen storage container subject to this paper should be managed with a gas charging pressure of less than 30 Mpa.

Performance of a 5 L Liquid Hydrogen Storage Vessel (5 L급 액체수소 저장용기의 성능특성 연구)

  • KARNG, SARNG WOO;GARCEAU, NATHANIEL;LIM, CHANG MU;BAIK, JONG HOON;KIM, SEO YOUNG;OH, IN-HWAN
    • Transactions of the Korean hydrogen and new energy society
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    • v.26 no.3
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    • pp.234-240
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    • 2015
  • In the face of the world's growing energy storage needs, liquid hydrogen offers a high energy density solution for the storage and transport of energy throughout society. A 5 L liquid hydrogen storage tank has been designed, fabricated and tested to investigate boil-off rate of liquid hydrogen. As the insulation plays a key role on the cryogenic vessels, various insulation methods have been employed. To reduce heat conduction loss, the epoxy resin-based insulation supports G-10 were used. To minimize radiation heat loss, vapor cooled radiation shield, multi-layer insulation, and high vacuum were adopted. Mass flow meter was used to measure boil-off rate of the 5 L cryogenic vessel. A series of performance tests were done for liquid nitrogen and liquid hydrogen to compare with design parameters, resulting in the boil-off rate of 1.7%/day for liquid nitrogen and 16.8%/day for liquid hydrogen at maximum.

Study on the Application for Hydrogen Storage Tank of MmNi4.5Mn0.5Zrx(x=0, 0.025, 0.05, 0.1) Alloys Containing Excess Zr (과잉 Zr을 첨가한 MmNi4.5Mn0.5Zrx(x=0, 0.025, 0.05, 0.1) 합금의 수소용기 적용에 관한 연구)

  • Kang, Kil-Ku;Park, Sung-Gap;Kang, Sei-Sun;Kwon, Ho-Young
    • Korean Journal of Materials Research
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    • v.12 no.8
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    • pp.624-633
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    • 2002
  • In order to improve the hydrogen storage capacity and the activation properties of the hydrogen storage alloys, the rare-earth metal alloy series, MmN $i_{4.5}$M $n_{0.5}$Z $r_{x}$(x=0, 0.025, 0.05, 0.1), are prepared by adding excess Zr in MmN $i_{4.5}$M $n_{0.5}$ alloy. The various parts in hydrogen storage vessel consisted of copper pipes reached the setting temperature within 4~5 minutes after heat addition, which indicated that storage vessel had a good heat conductivity required in application. The performance test on storage vessel filled with rare-earth metal alloys of 1000 gr was also conducted after hydrogen charging for 10 min at $18^{\circ}C$ under 10 atm. It showed that the average capacity of discharged hydrogen volume was found to be for $MmNi_{4.5}$ $Mn_{0.5}$ and $MmNi_{4.5}$ $Mn_{x}$ 0.5/$Zr_{samples}$ indicated that the released amount of hydrogen for this $AB_{5}$ type alloys was more than 92 % of theoretic value, and also it was found that the optimum discharging temperature for obtaining an appropriate pressure of 3 atm was determined to be $V^{\circ}C$ for $MmNi_{4.5}$ $Mn_{0.5}$$Zr_{x}$(x=0, 0.025, 0.05, 0.1) hydrogen storage alloys. The released amount of these hydrogen storage samples was 125 $\ell$ , 122.4 $\ell$ and 108.15 $\ell$/kg for $MmNi_{4.5}$ $Mn_{0.5}$ $Zr_{0.025}$ $MmNi_{4.5}$M $n_{0.5}$Z $r_{0.05}$, and MmN $i_{4.5}$ Mn_0.5$Zr_{0}$, at $70^{\circ}C$ respectively. Amount of the 2nd phases increase with increase on Zr contents in $MmNi_{4.5}$$Mn_{0.5}$ $Zr_{ 0.1}$/ alloy. This phenomenon indicates that$ ZrNi_3$ in $MmNi_{4.5}$ $Mn_{0.5}$ $Zr_{x}$ / phase, which shows the maximum storage capacity and the strong resistance to intrinsic degradation, is considered as a proper alloy for hydrogen storage. As the Zr contents increase, the activation time and the plateau pressure decreases and sloping of the plateau pressure increases.creases.eases.s.

Development and Analysis of the Highly Efficient Support System in a Liquid Hydrogen Vessel (액체수소 저장탱크용 고효율 지지 시스템 개발 및 해석)

  • Yun, Sang-Kook;Park, Dong-Heun
    • Journal of Advanced Marine Engineering and Technology
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    • v.31 no.4
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    • pp.363-369
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    • 2007
  • Probably the most significant heat transfer in the cryogenic liquid hydrogen storage tank from the atmosphere may occur through its support system. In this paper the efficient support system for the cryogenic storage vessel was newly developed and analysed. The support system was composed of a spherical ball as a supporter to reduce the contact area. which is located between two supporting SUS tubes inserted SUS and PTFE blocks. Numerical analyses for temperature distribution, and the thermal stress and strain of the support system were performed by the commercial codes FLUENT and ANSYS. The heat transfer rate of the supporter was evaluated by the thermal boundary potential method which can consider the variation of thermal conductivity with temperature. The results showed that the heat transfer rate through the developed supporter compared with the common SUS tube supporter was significantly reduced. The thermal stress and strain were obtained well below the limited values. It was found that the developed supporter can be one of the most efficient support systems for cryogenic liquid storage vessel.

Storage and Delivery of Hydrogen Isotopes (삼중수소 저장기술)

  • Chung, Hong-Suk;Chung, Dong-You;Koo, Dae-Seo;Lee, Ji-Sung;Shim, Myung-Hwa;Cho, Seung-Yon;Jung, Ki-Jung;Yun, Sei-Hun
    • Transactions of the Korean hydrogen and new energy society
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    • v.22 no.3
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    • pp.372-379
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    • 2011
  • A nuclear fusion fuel cycle plant is composed of various subsystems such as a hydrogen isotope storage and delivery system, a tokamak exhaust processing system, and a hydrogen isotope separation system. Korea shares in the construction of its ITER fuel cycle plant with the EU, Japan, and the US, and is responsible for the development and supply of the storage and delivery system. The authors thus present details on the development status of hydrogen isotope storage technologies for nuclear fusion fuel cycle plants. We have developed various hydride beds of different size. We have realized a hydrogen delivery rate of 12.5 $Pam^3/s$ with a typical 1242g-ZrCo bed.

A Study on the Structural Safety Analysis of Neck Mount Block of Type 4 Hydrogen Storage Vessel by Finite Element Method (유한요소법을 이용한 type 4 수소저장용기용 고정 장치의 구조적 안전성 분석에 관한 연구)

  • GUNWOO KIM;HYEWON KIM;HANMIN PARK;JEONGHO LEE;SUJIN YOON;HANSU LEE;JOUNGLYUL KIM;SEOKJIN LEE;GYEHYOUNG YOO;YOUNGGIL YOUN;HANSANG KIM
    • Transactions of the Korean hydrogen and new energy society
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    • v.35 no.2
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    • pp.195-204
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    • 2024
  • The study involves a finite element analysis to evaluate the structural integrity of the neck mount block for a type 4 hydrogen storage vessel, with the aim of enhancing its strength and rigidity. The existing neck mount block consists of a fixed part and a sliding part, each comprising a body block for load support, a screw part for neck boss fixation, and bolts. To analyze the vulnerabilities of the neck mount block under bolt fastening and load conditions relative to vehicle travel directions, a structural analysis process was developed. Comparative analysis between the enhanced design and the existing model was performed, resulting in improved strength and rigidity. The objective is to provide guidance for the current product development and to offer fundamental data for the design and structural analysis of future development projects.