Faz değişim malzemesi entegreli metal hidrat hidrojen depolama tankının sayısal modellenmesi

In this study, numerical investigations on the performance of the charging process of a metal hydride-based hydrogen storage tank are presented. Three scenarios were developed to examine the absorption performance and compare the effectiveness of the proposed thermal management alternatives. In Scenario-1, the metal hydride (MH) tank is cooled by convective heat transfer, i.e., external convection, on the side surface of the tank. In scenario-2, phase change material (PCM) is wrapped around the MH tank to investigate passive thermal management. A hybrid approach, Scenario-3 includes the PCM layer and an internal heat sink. In this scenario, the heat transfer fluid (HTF) inside the tube is activated depending on the temperature inside the MH tank. A 2D axisymmetric numerical code was developed using the finite volume approach in MATLAB software. In parametric study, (i) charge pressure, (ii) external convective heat transfer coefficient, (iii) PCM thickness, (iv) latent heat of PCM, (v) PCM melting temperature (vi) HTF temperature (vii) convection coefficient of HTF (viii) porosity parameters are considered and a total of 379 parametric analyzes were performed. Time-dependent variations of hybrid bed temperature and weight ratio were evaluated for each scenario. As a result, it has been observed that storage performance is strongly dependent on the transport coefficient at ambient conditions. While the storage criteria were determined according to different thermal management strategies, PCM thickness and latent heat of fusion showed higher storage performance than the external convection coefficient at the same charge pressure.