Session: DA-21-02 Design and Analysis of Hydrogen Pressure Equipment - 2

Paper Number: 107195

107195 - Study on Anti-Instability Inflation Pressure of Vehicle-Mounted Type IV Hydrogen Storage Cylinder 

When the hydrogen storage cylinder is wound by fiber, the fiber will exert external pressure on the lining. Because the engineering plastic is used as the liner material, the type Ⅳ hydrogen storage cylinder is low in stiffness and is more prone to buckling instability. In engineering manufacturing, the inner lining is often inflated to prevent instability. With a 70MPa vehicle-mounted  type Ⅳ hydrogen storage cylinder being taken as an example, the finite element model of the hydrogen storage cylinder liner is constructed. Based on the finite element method, the critical buckling load of the hydrogen storage cylinder can be obtained. Through the analysis model of the hydrogen storage cylinder, the variation law of the inflation pressure during the fiber winding process is revealed. In this paper, the innermost layer is the hoop winding layer and it is analyzed by alternating hoop winding method and spiral winding method. The results show that: The required inflation pressure is the largest when winding the first layer but drops rapidly when winding the second layer. In addition, with the increase of the number of winding layers, the pressure of the winding layer rises gradually and the growth rate of the inflation pressure decreases gradually. Among them, the external pressure value will decrease slightly when winding the spiral fiber layer and the decrease amplitude gradually decreases with the increase of the number of winding layers. Besides, the effect of the change of the winding bandwidth on the inflation pressure is analyzed. It is found that the required inflation pressure increases with the increase of the winding bandwidth and that the effect of the fiber bandwidth on the minimum inflation pressure increases with the increase of the number of winding layers. Thereinto, the inflation pressure decreases with the increase of the winding bandwidth in the first layer. The conclusion can provide theoretical basis for the air inflation design in the process of fiber winding.

Presenting Author: Zezhong Liu China Special Equipment Inspection and Research Institute

Presenting Author Biography: Graduate student in Hunan University of Science and Technology

Authors:

Zezhong Liu China Special Equipment Inspection and Research Institute
Zhiwei Chen China Special Equipment Inspection and Research Institute
Xiaoliang Jia China Special Equipment Inspection and Research Institute
Fang Ji China Special Equipment Inspection and Research Institute