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成果報告書詳細
管理番号20170000000128
タイトル*平成28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2017/4/27
報告書年度2016 - 2016
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. FY2016 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 influence of hydrogen exposure on the polymeric liner materials of hydrogen dispenser hoses, polyamide homopolymer testpieces have been exposed to 90 MPa hydrogen for 100 hours at -40℃ of the polyamide. After exposure, the transparent polyamide specimen was white and not cloudy. Microscopic observation showed no microcracks in whitened specimens. However, the stress-strain curve obtained by the tensile test of these specimens showed the yield stress increased by hydrogen exposure. In order to understand the mechanical properties under high-pressure hydrogen at low temperature, which is simulated condition of hydrogen dispenser hose at hydrogen station, three-point bending test of polyamide testpiece under 30 MPa at -20 °C compared with under atmospheric pressure at -20 °C and room temperature were performed. Polyamide showed brittle fracture under all conditions and the fracture strength under 30 MPa hydrogen atmosphere was larger than that under atmospheric pressure, because of craze production by penetrated hydrogen. The lifetime evaluation of the hydrogen dispenser hose was decided to be done by the hydrogen impulse test. The temperature of hydrogen to be circulated was controlled from -33 ° C to -40 °C. The high pressure side of the repeat cycle was controlled from 90 MPa to 97 MPa and the low pressure side was controlled around atmospheric pressure. The cycle time for pressurization and decompression was determined to be 20 seconds to 30 seconds in total. In order to confirm the cycle life of the model hose 2, a hydrogen impact test was performed. Model Hose 2 showed more than 6,600 times in the hydrogen impulse test. The reinforcement line of the hydrogen impulse kept the hose and the hose tested in the field at the original strength and showed no evidence of strength deterioration.
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