Research on the Creep and Fatigue Evaluation Method of the Double-Layered Annulus Metal Hydride Bed Combined with Numerical Modeling and ASME Code

Applied to a hydrogen absorption-desorption cycle, the storage bed will experience higher exchange temperatures and variety of mechanical load. Due complex structure double-layered annulus metal hydride importance thermal stress on failure bed, numerical modeling its hot spot was carefully carried out. Moreover, in this paper, an analysis method considering limit mode condition is proposed deal with process absorption desorption. According method, maximum thermal-structural coupling occurs at about 1/3 along diameter direction geometric mutation connection between cooling pipe main body Apart from that, also subjected thermal-mechanical fatigue by iterative desorption, operating temperature range creep region. Based distribution temperature, evaluation sites were selected ASME-NB ASME-NH codes used evaluate creep, respectively. The showed that damage generated during service life small, while relatively large total within safe range. Aiming double-layer methods are proposed, various modes highlighted, relationship parameters established.