3级储氢系统快速加氢过程的建模及参数优化

在氢气快速加注过程中，由于氢气的快速压缩及焦耳-汤普逊效应会导致气瓶内部温度急剧上升导致气瓶失效，从而产生安全隐患。针对3级储氢系统，建立了高压氢气快速加注过程的数学模型，用于分析车载氢气瓶在不同工作环境中的温升效应。结果显示加氢站储氢系统的控制压力切换点和预冷系统的控制温度对氢气最终状态影响较大。据此，以压力切换点和预冷温度为优化参数，预冷能耗、加注时间及氢气瓶最终氢气状态S_OC为优化目标建立了多目标优化模型，结果表明该方法可以在尽可能减小预冷能耗和提高S_OC的基础上完成高压氢气的快速加注。

Modeling and optimization of hydrogen fast filling process with cascade storage system

Due to the rapid compression and the Joule-Thompson effect of hydrogen during fast filling process, the internal temperature of the cylinder rises sharply, which may lead to hidden safety hazards. In this study, a mathematical model of a cascade storage system was developed to analyze the temperature rise in hydrogen cylinders under different working conditions. Results show that the pressure switching coefficient of the cascade storage system has a significant effect on the filling time, and the pre-cooling of hydrogen has a significant impact on the final temperature and the states of charge (S_OC) of the cylinder. Based on these results, a multi-objective optimization algorithm was proposed to optimize the above two controllable variables, taking filling time, energy consumption and S_OC within cylinders as optimizing objectives. The results show that the optimized method can significantly decrease the energy consumption, improve S_OC and allow acceptable refueling time.