G1800-1-4 極端温度環境・実使用圧力条件による自動車用圧縮水素容器(VH3)の疲労寿命調査(交通・物流部門一般講演:自動車用圧縮水素,社会変革を技術で廻す機械工学)
詳細
The pressure of compressed hydrogen changes with temperature when mass and volume are constant. Therefore, when a compressed-hydrogen tank is filled with a certain amount of hydrogen it is necessary to adjust the filling pressure according to the temperature. In this study, we conducted hydraulic pressure-cycle tests to investigate the fatigue life of VH3 compressed-hydrogen tanks at actual pressure and extreme temperatures. The results indicated that the fatigue life at low temperatures (-40℃, 28MPa) and room temperature (15℃, 35MPa) was almost equal. However, the fatigue life at high temperatures (85℃, 44MPa) was shorter than that under other conditions, suggesting that stress changes caused by thermal stress affect the fatigue life of the VH3 tank.
