复合材料氢气瓶快充过程温升控制方法研究

RESEARCH ON CONTROL OF TEMPERATURE RISE IN FAST FILLING OF COMPOSITE HIGH PRESSURE HYDROGEN CYLINDERS

复合材料氢气瓶对使用温度有限制,一般要求不高于85℃。氢气瓶在快速充装过程会产生温升,且氢气瓶快充温升与充装参数、气瓶几何参数、气瓶壁面热力学参数等相关。依据理论分析得出了相关影响因素对绝热快充过程温升的影响规律,结合试验与数值模拟数据研究了不同充装压力、初始压力、初始温度与充装速率下的温升,并得出各参数对温升的影响规律。最终依据氢气瓶快充温升研究结果,得出氢气瓶快充过程温升的计算公式,与试验结果相比,误差基本在5%以内。并进一步提出控制温升方法,认为通过控制加注速率或初始温度能有效控制加注温升。

The temperature of hydrogen cylinder is limited to 85 ~C. However, there are temperature rise in fast fill- ing of hydrogen storage cylinders which is related with filling parameters, geometric parameter, and thermodynamic parameter. In this paper, a theoretical analysis model for temperature rise in hydrogen fast filling process for com- posite hydrogen storage cylinders was establish. The temperature rise in adiabatic filling process for the cylinder was analyzed with the model and the settled temperature rise was obtained. The influence on temperature rise such as settled pressure, initial pressure, mass filling rate and initial temperature were analyzed with experimental and nu- merical simulation data. And their influence on temperature was found out. Based on the simulation results and experimental data, an accurate equation for temperature rise calculation of storage cylinder was put forward. Comparing with experimental data, the error of computed results is basically in 5 %. Furthermore, the control method for temperature rise was brought out by controlling the mass filling rate or the initial temperature.