Study on Hydrogen Environment Fatigue Test System and Correlative Fatigue Test of Hydrogen Storage Vessel

A 70 MPa hydrogen environment fatigue test system has been designed and applied in the manufacture of a hydrogen storage vessel. The key equipment is a 80 MPa flat steel ribbon wound high pressure hydrogen storage vessel. A reasonable stress distribution has been realized, which is low stress on the liner of the pressure vessel and even stress on the flat ribbon layers. This optimal stress distribution is achieved through the adjustment of the prestress in flat steel ribbons. A control system for the fatigue test system has also been designed. It consists of a double control model, manual control and automatic control, to satisfy different experiment requirements. The system is the only one which can be used in the real hydrogen environmental fatigue test system in China. An experiment for a 70 MPa onboard composite material hydrogen vessel has been carried out on the system. The experimental results from this test are in close agreement with the practical operating conditions.

Fatigue test of carbon epoxy composite high pressure hydrogen storage vessel under hydrogen environment

A significant temperature raise within hydrogen vehicle cylinder during the fast filling process will be observed, while the strength and fatigue life of the cylinder will dramatically decrease at high temperature. In order to evaluate the strength and fatigue of composite hydrogen storage vessel, a 70-MPa fatigue test system using hydrogen medium was set up. Experimental study on the fatigue of composite hydrogen storage vessels under real hydrogen environment was performed. The experimental results show that the ultimate strength and fatigue life both decreased obviously compared with the values under hydraulic fatigue test. Furthermore, fatigue property, failure behavior, and safe hydrogen charging/discharging working mode of onboard hydrogen storage vessels were obtained through the fatigue tests.

Research on Hydrogen Environment Fatigue Test System and Correlative Fatigue Test of Hydrogen Storage Vessel

A 70 MPa hydrogen environment fatigue test system has been designed and applied in the manufacture of a hydrogen storage vessel. Key equipment is the 80 MPa flat steel ribbon wound high pressure hydrogen storage vessel. A reasonable stress distribution has been realized, that is low stress in the liner of the pressure vessel and even stress in the flat ribbon layers. This optimal stress distribution is achieved through the adjustment of the prestress in flat steel ribbons. A control system for the fatigue test system has also been designed. It consists of a double control model, i.e. manual control and automatic control, to satisfy diffierent experimental requirements.The system is the unique one that can be used in the real hydrogen environmental fatigue test system in China.An experiment for the 70 MPa onboard composite material hydrogen vessel has been carried out on the system.The experimental result from this test is in close agreement with the practical operating conditions.

整体多层包扎式高压储氢容器的设计与分析

氢能是最有发展潜力的新能源,高压储氢容器是氢能被广泛利用的关键设备。对整体多层包扎式高压储氢容器的筒体、封头、接管与开孔、筒体与封头焊接结构进行了分析与设计,同时建立了封头与接管处有限元模型,仿真结果表明:最大应力发生在封头直边处,与实际可能发生失效位置相符,且各路径的应力评定结果合格。在工作条件产生的循环应力作用下,疲劳寿命校核合格。

密封充氢环境条件下固态电化学氢气传感器效应试验研究

目的研究密闭充氢环境下固态电化学氢气传感器效应。方法设计能模拟低氧、低氢和压力变化的密闭充氢环境,并在此环境中进行一系列氢气传感器效应试验,分析、评定试验数据。结果得到了不同环境下氢气、氧气浓度随时间变化的规律,提出固态电化学氢气传感器的有效工作环境,并预测了其在不同贮存环境下的工作寿命。结论密闭充氢环境内压力和温度的变化对固态电化学氢气传感器影响较大,湿度影响较小,注气检定合格的氢气传感器,在密封容器内扩散式检定,不合格率高,检定数据误差大于±5%FS。

燃料电池城市客车用储氢瓶有限元分析和疲劳寿命分析

用有限元法对燃料电池城市客车用储氢瓶进行了预紧导致的残余应力应变分析和充放气条件下的表面应力应变分析,通过与实测结果进行对比可知,二者基本吻合,说明有限元模型分析结果可信。进行储氢瓶疲劳寿命分析时,先得出铝内衬零件S-N曲线,再将铝内衬筒体中部的多轴交变应力转换为等效的对称循环条件下的单轴交变应力,最后根据该S-N曲线得出储氢瓶疲劳寿命为2.57×105次循环,与实际情况相符。

高压储氢容器氢环境疲劳试验系统研制

通过对70 MPa氢环境疲劳试验系统的设计和制造,研制了80 MPa扁平钢带缠绕式高压储氢容器,利用钢带预应力的调节实现了容器壁内衬低应力、绕带层等应力的合理应力分布。设计了疲劳试验系统的控制系统,实现手动和自动控制两种控制模式,以满足不同的试验需要。该系统是目前国内惟一的一套可用于真实氢环境疲劳试验的系统,已投入应用。