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 28, Issue 1
Displaying 1-18 of 18 articles from this issue
  • [in Japanese]
    2003 Volume 28 Issue 1 Pages 1
    Published: 2003
    Released on J-STAGE: July 21, 2022
    DOI
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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  • Ikuo JITSUHARA, Nobuhiko TAKAMATSU
    2003 Volume 28 Issue 1 Pages 4-10
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Japanese Steel Industry has so far been recognized as a typical complex of large-scale producer of a fundamental material(steel) and large-scale consumer of energy. Howeber, for the coming materials recycle society and hydrogen energy society, Japanese Steel Industry has been recently reevaluated to play a key role mainly due to its specific large-scale high-temperature infrastructure along with its operating technologies. Its by-products are also notable, especially, COG(Coke Oven Gas: by-product gas from Coke Oven Batteries) seems to be promising as a clean energy source for its amount and high H2 content. Present and future status of COG as a hydrogen outsourcing source was discussed along with an ongoing H2 amplifying technology development program. And a future perspective on Japanese Steel Industry as a comprehensive clean energy outsourcing base was proposed.

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  • Shunsuke OHGA
    2003 Volume 28 Issue 1 Pages 11-15
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Phosphoric acid fuel-cell power units featuring environmentally-friendly qualities and high power generation efficiency has been studied in various fields. Fuji Electric Co.,Ltd. installed fuel-cell power plants using biogas from garbage in the Port Island area of Kobe and biogas from sludge of sewage in Yamagata clean center.

    The cumulative operation time of these systems achieved over 8,000 hours. We report these systems and operation data.

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  • Masao FUKUOKA
    2003 Volume 28 Issue 1 Pages 16-22
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Through brine electrolysis a lot of hydrogen is generated from Chlor-alkali industry. Hydrogen from brine electrolysis is very pure and easy to use for industry, also is expected as clean energy resources. To consider of possibility for clean energy resources, utilization of hydrogen from Chlor-alkali industry is analyzed. Hydrogen from brine electrolysis is utilized effectively for row materials and fuels. To utilize of hydrogen from Chlor-alkali industry as clean energy resources, economical discussion is very important.

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  • Yoshitaka HAYAUCHI, Masahiro ISHIKURA
    2003 Volume 28 Issue 1 Pages 23-28
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    When available hydrogen production capacity of the petroleum and ammonia industries as well as unused by-product gas of petrochemical industries and soda industries is fully utilized, hydrogen balance in the petroleum and chemical industries in Japan will be the surplus of 9.8 billion Nm3 /year. Taking into consideration the loss caused by refining the surplus hydrogen to a purity level of 99.99% as well as the future outlook for the industries, the amount of high purity hydrogen supply available from the petroleum and chemical industries is expected to increase from the current 6.6 billion Nm3/year to 6.8 billion Nm3/year in 2010 and to 7.2 billion Nm3/year in 2020. (The amount available by using existing facilities and with a little additional investment.) The hydrogen demand of 5 million FCVs is estimated to be 3.8-6.2 billion Nm3/year in 2020. Therefore, the surplus hydrogen from the petroleum and chemical industries could satisfy the hydrogen demand in 2020 fully.

    On the other side, the petroleum industry already has a completely established infrastructure for supplying oil energy, for example oil tanks, gas stations and distribution systems. We think that the petroleum industry has a major role as we shift into the hydrogen economy. The petroleum industry should be actively involved in the research and development initiatives for establishing the infrastructures necessary for supplying hydrogen energies.

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  • Makoto akurai, Saburo Shimizu, Yasuhito Ishida, Syuichi Ueno
    2003 Volume 28 Issue 1 Pages 29-38
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    The system of hydrogen production by water electrolysis using nuclear off-peak power was investigated. The cost of off-peak power by substituting nuclear power source for various power sources was evaluated. These off-peak power cost data were connected with two kinds of plant data of the water electrolysis and hydrogen production cost using off-peak power was calculated. It was found that the hydrogen production cost by this proposal could be cheap in comparison with that from the conventional method. Annual patterns of hydrogen production using off-peak power were also investigated.

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  • Shusuke Tokumoto, Yoshiharu Tsujikawa, Ken-ichi Kaneko
    2003 Volume 28 Issue 1 Pages 39-44
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    This paper concerns to the inverted turbojet engine intended for operation in the range of Mach numbers from 0 to 6. In the present engine configuration, which is based on the inverted Brayton cycle, the sequence of the core-engine components was arranged in the order: turbine - heat exchanger - compressor - combustor. It should also be noted that the inverted Brayton cycle has also been considered for application to stationary power generation systems in the role of a bottoming cycle. An improved version of the inverted turbojet engine (ITE), has also been proposed in the present paper, incorporates an additional burner installed between the inlet and the turbine. At low speeds this additional burner allows a heat input upstream of the turbine to augment thrust. The fuel-rich mode of operation is expected to be beneficial at high speed range. In summary, the inverted turbojet engine can produce sufficient thrust compared to other engine configurations and it reveals high-energy efficiency over the wide speed range.

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  • Kengo Matsuo, Makoto Sakurai, Hideo Kameyama, Shinji Kubo
    2003 Volume 28 Issue 1 Pages 45-49
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Cycle simulation of the Iodine-Sulfur thermochemical hydrogen production process was conducted for the establishment of the closed cycle continuous operation method. After the confirmation of validity of simulation model for each unit of the IS process, the effect of disturbance for the process on the continuous operation was investigated by changing flow rate of circulating substances. It was found that there were two cases of disturbance. One is that the disturbance amplifies the fluctuation in the process. Another is that the disturbance offsets the fluctuation. The operating condition of the latter case was found to close on the new steady state.

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  • T. Miyatake, S. Mizusaki, N. Sato, M. Ito, I. Yamamoto, Y. Sakurai, M. ...
    2003 Volume 28 Issue 1 Pages 50-53
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Compton profiles for metal hydrides Mg2NiHx(x=2, 4(HT), 4(LT)) and the host compound Mg2Ni were mesured by high-resolution Compton scattering with 115keV synchrotron radiation. Difference Compton profiles between the hydrides and the host compound were compared with theoretical Compton profile calculated by the LDA-FLAPW method, showing the influence of the absorbed hydrogen on the electronic structure.

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  • Hiroki Sakaguchi, Naoto Nakanishi, Shin-suke Kobayashi, Akira Ohhashi, ...
    2003 Volume 28 Issue 1 Pages 54-60
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    New magnesium-based intermetallic compounds including group 14 elements, such as Mg2 and Mg2Sn, which combine with hydrogen covalently were synthesized by mechanical alloying, and the hydrogenation characteristics of the compounds were investigated. From the Sievert’s measurement method, it was found that the mechanically alloyed Mg2 absorbs and desorbs hydrogen reversibly at moderate temperature, though the hydrogen content was not so large. The amounts of absorbed and desorbed hydrogen were enhanced by addition of nickel to Mg2. The best performance was obtained at the composition of Mg2Ge0.8Ni0.2. The analogous tendency was observed on the mechanically alloyed Mg2Sn, but this compound was inferior to Mg2 in the performance of hydrogenation properties. The pressure–composition isotherms for Mg2Ge–H and/or Mg2Ge0.8Ni0.2–H systems were obtained electrochemically at 303 K. The amounts of hydrogen released from the compounds were found to be 0.50 and 0.86 wt% for Mg2 and Mg2Ge0.8Ni0.2, respectively. The amount of desorbed hydrogen was larger for Mg2Ge0.8Ni0.2 than for Mg2Ge. This result was coincident with that from the Sievert’s measurement. The existence of hydrogen in the alloys obtained was also confirmed by neutron radiography.

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  • Hiroto TAKEUCHI, Shigeki TAKAIWA, Shinya HODOSHIMA, Yasukazu SAITO
    2003 Volume 28 Issue 1 Pages 61-66
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    The reversible pair of decalin dehydrogenation / naphthalene hydrogenation under mild reaction conditions, adoptable to long-term storage and long-distance transportation of hydrogen, was investigated with use of a flow-type reactor for decalin dehydrogeno-aromatization by affording pulsed liquid substrate to carbon-supported Pt catalysts. The amount ratio of catalyst-to-substrate was very sensitive to the rates of hydrogen evolution as well as of its evaporation, as was found with a bath-wise reactor. Simultaneous pursuits in the flow reactor with respect to catalyst-layer temperatures, evolved amounts of hydrogen and condensate compositions were useful for elucidating the superheated liquid-film states of dehydrogenation catalysts.

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  • Yuji ANDO, Tadayoshi TANAKA, Yasukazu SAITO
    2003 Volume 28 Issue 1 Pages 67-72
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Effective hydrogen pressure at the negative electrode, affecting the output of thermally regenerative fuel cell driven by acetone/hydrogen and acetone/2-propanol redox pairs, has been discussed. Whereas the open circuit voltage of the acetone/hydrogen thermally regenerative fuel cell was almost equal to theoretical one, the magnitude of the other redox type, i.e., acetone/2-propanol, was relatively small but increased at higher temperatures, being well interpreted in terms of effective hydrogen pressure at the negative electrode. With regard to the internal resistance of the cell, however, its dependences on electrode area and reaction temperatures were the same for both types.

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  • Yasukazu SATO, Seiki CHIBA
    2003 Volume 28 Issue 1 Pages 73-78
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Safety measures need to be taken and existing regulations should be re-examined in order to realize installing hydrogen refueling stations in towns. To obtain a basis for re-examining regulations, we have carried out experiments on hydrogen deflagration. We have observed the maximum overpressure of 1.5 kPa from the deflagration of 5.2 m3of 30% hydrogen/ 70% air mixture at the range of 10 m from the gas mixture with no obstacle in open space. The maximum overpressure did not exceed the safety limit of 9.8 kPa recomended in WE-NET safe design guideline, though the overpressure was much higher than one of 0.18 kPa from the deflagration of 9.5% town gas. However, greater overpressure and flame propagation velocity have appeared when a dense obstacle exists inside of hydrogen/air mixture. The hydrogen deflagration in confined space like a tube has also generated greater overpressure than in open space.

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  • Akihiro KATAOKA, Hideyuki ISHIKAWA
    2003 Volume 28 Issue 1 Pages 79-84
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Toho Gas has constructed a hydrogen refueling station that uses natural gas reforming technology to supply hydrogen to fuel cell vehicles. We have been conducting demonstration tests to develop hydrogen supply infrastructures for fuel cell powered vehicles as an energy supplier. This presentation includes the outline of hydrogen refueling station we constructed and the results of its demonstration tests. Besides, our activities on hydrogen related technologies such as residential fuel cell system developments are introduced.

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  • [in Japanese], [in Japanese], [in Japanese]
    2003 Volume 28 Issue 1 Pages 85-89
    Published: 2003
    Released on J-STAGE: July 21, 2022
    DOI
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  • [in Japanese]
    2003 Volume 28 Issue 1 Pages 90-92
    Published: 2003
    Released on J-STAGE: July 21, 2022
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  • Takahiro OHSHITA
    2003 Volume 28 Issue 1 Pages 93-100
    Published: 2003
    Released on J-STAGE: July 21, 2022
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    Gasification process for coal or waste plastics has been developed. Since in these conventional gasification technologies, partial combustion method is used, combustion gas is mixed in product gas. Therefore , in such partial combustion method, oxygen should be used for keeping high-concentration of valuable gas in th e product gas. However, if you use a raw materials of low heat value such as biomass, although oxygen is supplied to gasifier, concentration of valuable gas cannot be high. It suggests that a new concept which is different from conventional technologies should be established to obtain high-concentration valued gas from raw material s of low heat value. Internally circulating fluidized bed gasification is one of such new concepts of gasification

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  • [in Japanese]
    2003 Volume 28 Issue 1 Pages 101-103
    Published: 2003
    Released on J-STAGE: July 21, 2022
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