ピンボール 木の豆ミックス2

Journal of the Hydrogen Energy Systems Society of Japan
Online ISSN : 2436-5599
Print ISSN : 1341-6995
Volume 33, Issue 3
Displaying 1-13 of 13 articles from this issue
  • [in Japanese]
    2008 Volume 33 Issue 3 Pages 1
    Published: 2008
    Released on J-STAGE: July 21, 2022
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  • Kazuo KOSEKI, Osamu MIYASHITA
    2008 Volume 33 Issue 3 Pages 4-8
    Published: 2008
    Released on J-STAGE: July 21, 2022
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    The working group (WG) activities of ISO/TC197 have been greatly activated in recent years. This is probably because hydrogen-related products are expected to distribute in commerce couple with the commercialization of fuel cells. To date, eight international standards (ISs) have been published, and eight ISs are under development by eight WGs. At present, Japan is acting as convenors in two WGs out of the eight. Japan is also preparing the submission of New Work Item Proposal (NWIP) on hydrogen specification for stationary fuel cells. Other countries such as France and Canada also have declared to submit NWIPs on several items. Further NWIP submission from Japan is desired to promote the profitable business for Japan

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  • Osamu MIYASHITA
    2008 Volume 33 Issue 3 Pages 9-16
    Published: 2008
    Released on J-STAGE: July 21, 2022
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    International Standardization in Hydrogen Technology is a key factor for realizing the Hydrogen Economy in the near future. ISO/TC197 (International Standardization Organization/ Technical Committee 197, Hydrogen Technology, has 13 Working Group (WG) and upto now, 8 International Standards (ISs) have been published and 8 ISs are under development by 8 WGs. 8 WGs under the development are; WG5/Hydrogen filling connectors, WG6/Gaseous hydrogen land vehicle fuel tanks, WG8/Hydrogen generators using water electrolysis, WG9/Hydrogen generators using reformers, WG10/Transportable gas storage in metal hydride, WG11/Gaseous hydrogen fuelling stations, WG12/Hydrogen fuel specification for FCV and WG13/Hydrogen detecting apparatus.

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  • Yasuo Takagi
    2008 Volume 33 Issue 3 Pages 17-22
    Published: 2008
    Released on J-STAGE: July 21, 2022
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    As hydrogen is expected as a fuel in the next generation of power sources since it has a high potentiality to mitigate global warming and contamination of the atmospheric circumstances because of the nature of hydrogen of CO2 free emissions and sustainable production sources, development of such technologies in these fields as fuel cell for automobile and stationary applications, hydrogen production, storage and delivery are widely undertaken all over the world.. Another issues to develop and introduce hydrogen widely and smoothly is standardization of hydrogen and related technologies. In this paper international activities to publish international standard of hydrogen fuel product specifications of PEM fuel cell application for road vehicle is introduced .

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  • Ichiro MATSUBARA, Woosuck SHIN, Naoya SAWAGUCHI
    2008 Volume 33 Issue 3 Pages 23-27
    Published: 2008
    Released on J-STAGE: July 21, 2022
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    Ensuring the safety of hydrogen infrastructures with quantitative and technical specification against the danger of hydrogen leakage will encourage the economics of hydrogen, lowering the cost of insurance and infrastructure in buildings, and safe operation of the station or system will appeal to the public. Hydrogen related facilities may be required to have the ability to detect hydrogen concentrations before a specified concentration of hydrogen or a fraction of flammable limit is reached, in order to allow for single and/or multilevel safety operations. This standard will provide requirements for stationary hydrogen detection apparatus, covering both performance requirements and test methods. This standard is intended to cover the situations where the user desires the ability to detect hydrogen leaks and monitor hydrogen concentrations relevant to safety. In this article, we would like to introduce the activities of ISO/TC197/WG13 “Hydrogen detectors” including the purpose, history, and future plane of the standardization as well as the contents of the on-going DIS draft for hydrogen detection apparatus.

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  • Hisayoshi TSUKIKAWA, Hiroshi KANAYAMA, Kazuo MATSUURA, Masahiro INOUE
    2008 Volume 33 Issue 3 Pages 28-35
    Published: 2008
    Released on J-STAGE: July 21, 2022
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    Numerical simulation of leaking hydrogen in a partially open space under natural ventilation is performed . Computation with the LVEL turbulence model (a zero-equation model) and the laminar model showed good agreement with experimental data .The transient behavior of hydrogen difusion in the space is discussed. Also, adequate and important boundary conditions, grid division, and the time step are discussed.

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  • Hiroyuki Harada
    2008 Volume 33 Issue 3 Pages 36-47
    Published: 2008
    Released on J-STAGE: July 21, 2022
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    By 2030, hydrogen produced by water electrolysis will be widely used for energy. Hydrogen for energy use is required to make the volume smaller by compressing. PEM water electrolysis can generate high-pressure hydrogen, but it has been not popular because of the difficulties of getting high-pressure electrolysis cell.

    Highly-compressed Hydrogen Energy Generator (HHEG) has been developed by using the newly invented delta-pressure compensator technology which makes no delta-pressure act on the electrolysis cell stored in high-pressure vessel. The trial HHEG produced with this technology can generate 40MPa, 30Nm3/H hydrogen with using a conventional 0.4MPa electrolysis cell.

    The data obtained by the operation of the trial HHEG indicate that the electrolysis efficiency depends on the permeation of hydrogen and oxygen into PEM and the permeation is controllable by controlling the solubility of hydrogen and oxygen into PEM. HHEG is very useful technology for 80MPa hydrogen production for hydrogen fuel vehicle.

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  • Yoshitsugu SONE
    2008 Volume 33 Issue 3 Pages 48-54
    Published: 2008
    Released on J-STAGE: July 21, 2022
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    The Japan Aerospace Exploration Agency (JAXA) is developing energy storage system using hydrogen as an active material. One example is the polymer electrolyte fuel cell system which can be applied to the closed environment like high altitude balloons, transfer vehicles and spacecrafts. In the case of the moon exploration, specially, regenerative fuel cell system is required for the survival during the night time on the moon. The fuel cell demonstration model was designed for the balloon mission. The system was designed for the low pressure environments where the working gases are supplied by the counter flow method and the temperature of the system is passively controlled by the heat generated from the fuel cell stack. The system was launched in August, 2007 using high altitude balloon of JAXA. Furthermore, a 100 W-class regenerative fuel cell system was designed, and demonstration model was prepared. Based on the concept design, we are going to clarify the applicability of the regenerative system for the aerospace missions.

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  • 2008 Volume 33 Issue 3 Pages 55-58
    Published: 2008
    Released on J-STAGE: July 21, 2022
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  • 2008 Volume 33 Issue 3 Pages 59-62
    Published: 2008
    Released on J-STAGE: July 21, 2022
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  • 2008 Volume 33 Issue 3 Pages 63-65
    Published: 2008
    Released on J-STAGE: July 21, 2022
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  • 2008 Volume 33 Issue 3 Pages 66-69
    Published: 2008
    Released on J-STAGE: July 21, 2022
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  • 2008 Volume 33 Issue 3 Pages 70-73
    Published: 2008
    Released on J-STAGE: July 21, 2022
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