大容积70 MPaⅣ型储氢瓶快充温升控制策略研究

RESEARCH ON FAST FILLING TEMPERATURE RISE CONTROL STRATEGY OF LARGE-VOLUME 70 MPa TYPEⅣHYDROGEN STORAGE CYLINDERS

以氢燃料电池重卡车载70 MPaⅣ型储氢瓶为对象,通过数值模拟方法,分析大容积70 MPaⅣ型储氢瓶快速充装过程的温升规律和温升控制策略。结果表明:较小的氢气充装速率可以降低气瓶温升,但会增加充装时间;较高的环境温度会导致气瓶充装结束时的满装状态无法达到90%~100%;降低氢气预冷温度可显著降低气瓶温升,但会增加加氢站的冷能消耗;线性升压模式和前30s预冷温度-40℃后续不预冷的预冷模式是该结构Ⅳ型储氢瓶最合适的温升控制策略。

Focusing on the 70 MPa typeⅣhydrogen storage tanks used in hydrogen fuel cell heavy trucks,this study employs numerical simulation methods to analyze the temperature rise patterns and temperature control strategies during the rapid refueling process of large-capacity 70 MPa typeⅣhydrogen storage tanks.The results indicate that a lower hydrogen filling rate can reduce the temperature rise of the tank but will increase the filling time;higher ambient temperatures to be unable to reach the full state of 90%to 100%at the end of refueling;lowering the hydrogen pre-cooling temperature can significantly reduce the temperature rise of the tank,but will increase the cold energy consumption of the hydrogen refueling station;a linear pressurization mode and the pre-cooling mode with a temperature of-40℃for the first 30 seconds followed by no pre-cooling are the most suitable temperature control strategies for the 70 MPa typeⅣhydrogen storage tank of this structure.