Designing Metal Hydride-Phase Change Material with Analytical and Numerical Method †

This study examines the thermal characteristics of metal hydride systems comprised of MgH₂ and LaNi₅, paired with LiNO₃·3H₂O and NaNo₃ as a phase change material, through both analytical and computational approaches. Analytical methods were utilized to identify the most suitable volume and mass proportions of metal hydrides to PCM, whereas simulations calculated hydrogen absorption/desorption times and temperature distribution. The findings indicate that MgH₂ functions at a higher temperature and necessitates a greater volume of PCM on account of its high enthalpy. In comparison, LaNi₅ exhibits more rapid absorption and desorption reaction rates, rendering it beneficial for use in applications requiring quick hydrogen storage.