成果報告書詳細
管理番号20160000000418
タイトル*平成27年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素ステーション用低コスト機器・システム等に関する研究開発 高圧水素機器用ホース等システム部材の研究開発
公開日2016/10/12
報告書年度2015 - 2015
委託先名株式会社ブリヂストン 国立大学法人九州大学
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Title:Research and Development of Technology for Hydrogen Utilization/Research and Development of Low-cost Equipment and System for Fuel Cell Vehicles and Hydrogen Stations/ Research and development such as a hose system member for high-pressure hydrogen equipment. FY2015 Annual Report.

Hydrogen dispenser hose is used under a low temperature and high pressure hydrogen atmosphere. Durability of hydrogen dispenser hose, believes that low temperature embrittlement, fatigue caused by pressurization and depressurization cycles. In order to confirm the durability of the hose by non-hydrogen fluids pressurization and depressurization cycles at were performed. Durability when using non-hydrogen fluid hoses, a large difference between the durability of the hose in the case of using hydrogen was confirmed. According to these results, the hydrogen is involved in the destruction of the hose. We also evaluate metal parts of the high-pressure hydrogen hoses after hydrogen pressurization and depressurization cycle test. Hydrogen embrittlement of the metal parts was not observed. To understand the relationship between high-pressure hydrogen resistance and physical properties of polymeric materials, hydrogen penetration amount and volume change after hydrogen exposure as hydrogen resistance are need to be evaluated for the various polymeric materials. In FY2015, hydrogen permeability test at 0.7 MPa of various polymeric materials, such as polyethylene homopolymers and aliphatic polyamide homopolymers were performed. The results of hydrogen permeability test of polyethylene homopolymers and aliphatic polyamide homopolymers were analyzed by "Permachor value", which can be calculated by an atomic group contribution for cohesive energy density and fraction of free volume. The hydrogen permeabilies of these polymers with different first order structure were proportional to their Permachor values. Based on the free volume theory of diffusion, logarithm of the gas permeation coefficient is proportional to the reciprocal free volume. According to the results of hydrogen permeation tests, it was confirmed that free volume theory of diffusion was applied for oxygen and other gases, as well as hydrogen gas. We also conducted 90 MPa hydrogen exposure for 24 hours at 30°C of polyethylene homopolymers and aliphatic polyamide homopolymers. After decompression, the appearance of aliphatic polyamide homopolymers were not changed. The appearance of polyethylene homopolymers, which glass transition temperature below 30°C, was whitened in terms of microvoides.
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