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日本エネルギー学会誌 Vol. 87 (2008), No. 6

ISIJ International
belloff
オンライン版ISSN: 1882-6121
冊子版ISSN: 0916-8753
発行機関: The Japan Institute of Energy

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日本エネルギー学会誌 Vol. 87 (2008), No. 6

コークス微視構造のポアソン比がコークス強度に与える影響の均質化法による数値解析的検討

上岡 健太, 尾形 知輝, 松下 洋介, 青木 秀之, 三浦 隆利, 福田 耕一, 松平 寛司

pp. 455-460

抄録

In this study, the effect of Poisson's ratio of microscopic structure on coke strength is numerically investigated using a homogenization method. In the analyses, microscopic structure of coke is composed of active components and pores. The stress analyses are carried out for cokes with different Poisson's ratio of microscopic structure and pore shapes in roundness. The analytical results are summarized as follows: - The differences in Poisson's ratio hardly affect microscopic stress distributions. - It is thought that the effect of Poisson's ratio on maximum stress is small. - Homogenized elastic modulus increases with the rise in Poisson's ratio. However, the difference in homogenized elastic modulus becomes small with an increase in porosity. - Considering porosity of coke is generally about 50 %, Poisson's ratio has little influence on coke rigidity.

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コークス微視構造のポアソン比がコークス強度に与える影響の均質化法による数値解析的検討

LNG冷熱利用液体水素製造プロセス用蓄冷装置

満田 正彦, 山本 誠一, 田中 正幸, 応本 和之, 関 辰与志

pp. 461-467

抄録

The LNG heat storage system for liquid hydrogen production system of 10,000Nm3/h was investigated. The LNG enthalpy change for vaporization is used to save energy of the compressor for the recycle hydrogen of liquid hydrogen process. As the LNG cannot be used in the night-time, its cold energy is accumulated in the day-time and it is released in the night-time. The screening test concerning the cold energy storage medium by DSC (Differential Scanning Calorimetry) measurement and the elemental experiment of the cold energy storage system of 0.2 m3 were carried. The feasibility study about the present hydrogen production system was performed, and it was concluded that the cost for hydrogen production is reduced from 4% to 8% and the energy for hydrogen production is reduced from 30% to 40%.

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LNG冷熱利用液体水素製造プロセス用蓄冷装置

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