Perpustakaan Digital ITB

Hydrogen has drawn global attention as a clean energy source and has extensive possible applications, including fuel for vehicles. Among several hydrogen storages, ammonia is considered promising due to high hydrogen density, stability, and total energy efficiency. Adopting ammonia as fuel in vehicles requires a proper fuel tank design to fulfill the required volumetric content and safety standards, without neglecting the economic objectives. In obtaining a pressure vessel that passes all safety standards, several tests are needed to be done; one of the tests is a burst test. In general, the type-IV pressure vessel is utilized as a fuel tank because it is the lightest compared to other types of pressure vessels. This research focuses on the effort to develop a lightweight type-IV ammonia pressure vessel designed for mobility for burst test. The material combination (liner and composite) and composite stacking sequence are analyzed for burst test by using the finite element method. Two polymer materials of polyethylene terephthalate (PET) and Polypropylene (PP) are evaluated as the liner considering its ultimate tensile strength, density, cost, and compatibility with ammonia. While carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) are adopted as a composite skin. Also, five composite stacking sequences are analyzed in this study. Von-Mises stress and Hashin's damage initiation criteria are used to evaluate the performance of liner and composite, respectively. As a result, PP-based pressure vessels generate lower stress in the liner compared to PET-based. Besides, CFRPbased pressure vessels have a higher safety margin and can generate lower stress in the liner and lower damage initiation criteria in the composite skin. The material combination of PP-CFRP with a stacking sequence of [±51]1s gives the lowest maximum stress in the liner during the burst test.