Novel high-pressure microtube hydrogen storage device has higher hydrogen storage density and safety than conventional hydrogen tanks. A one-dimensional numerical model for hydrogen filling process in microtubes is established, with reasonable calculation methods and accurate physical properties adopted. Based on the analysis of flow parameters variations, three stages of the filling process are summarized. At the beginning of the filling process, the maximum temperature appears at the inlet, but the average temperature does not rise significantly during the whole process. The effects of microtube length, filling pressure and environmental temperature are investigated and discussed. The results show that excessively long microtubes greatly increase the filling time and higher filling pressure reduces the filling time and improves the filling efficiency. The microtube hydrogen storage device achieves higher hydrogen storage density and filling efficiency in lower temperature mediums. It reveals that high filling pressure, low temperature encapsulation and reasonable microtube size design are the future development directions of microtube hydrogen storage for better application.

新型高压微管储氢装置比传统储氢罐具有更高的储氢密度和安全性。建立了微管充氢过程的一维数值模型，采用了合理的计算方法和准确的物理特性。在分析流动参数变化的基础上，总结了灌装过程的三个阶段。在灌装过程开始时，入口处出现最高温度，但整个过程中平均温度没有明显上升。研究和讨论了微管长度、填充压力和环境温度的影响。结果表明，过长的微管大大增加了充填时间，较高的充填压力减少了充填时间，提高了充填效率。微管储氢装置在低温介质中实现了更高的储氢密度和填充效率。揭示了高填充压力、低温封装和合理的微管尺寸设计是微管储氢更好应用的未来发展方向。