Stress analysis on the under-ground hydrogen storage by finite element analysis

The safe storage of hydrogen has become one of the key issues affecting the development of hydrogen energy. It is difficult to meet the demand for high-capacity hydrogen storage over long periods of time using removable hydrogen storage methods, and underground hydrogen storage is one of the effective ways to meet this demand. The finite element method is accurate enough to conduct the stress distribution. In present work, we conduct the finite element analysis on the stress distribution of underground hydrogen storage well. Result shows that when the initial pressure increase from atmospheric pressure to 50 MPa, the stress increases greatly. When there is the corrosion pit, the maximum stress is just located in the corrosion pit for the air intake and the middle pipeline. For the base, however, the maximum stress changes little for the base and the maximum stress is not located in the corrosion pit.