Akademik Veri Yönetim Sistemi
International Journal of Hydrogen Energy, cilt.200, 2026 (SCI-Expanded, Scopus)
Hydrogen is a promising clean energy carrier, offering significant potential in fuel cell (FC) applications and various storage systems, such as compressed gas, liquid hydrogen, and metal hydrides (MHs). Effective thermal management, using passive methods like fins or phase change materials and active methods like heat transfer fluids or exhaust gases, is critical for optimizing MH-based hydrogen storage systems during absorption and desorption processes. With the growing push for sustainable energy solutions, making hydrogen storage and use more efficient is now a big focus for developing vehicular applications. This study investigates a hydrogen storage system incorporating an FC with MH tanks for lightweight hybrid vehicles. A comprehensive one-dimensional axisymmetric mathematical model of the metal hydride tank was developed in MATLAB/Simulink, along with a detailed system model to analyze hydrogen desorption, temperature dynamics, and thermal coupling effects between the FC and MH tanks. Redirecting waste heat from the FC to the MH tanks significantly improved hydrogen release rates, efficiency, and driving range, with a 272 % range increase in cases based on using a hydrogen flow controller. Thermal coupling boosted the heat transfer coefficient of the exhaust air from 5 to 20 W/m2K, enhancing desorption rates and maintaining steady tank performance. When examining Scenario-1 (thermally de-coupled), Scenario-2 (thermally coupled), Scenario-3 (thermally de-coupled with H2 flow controller), and Scenario-4 (thermally coupled with H2 flow controller), the system efficiency in scenarios was approximately 31.47 %, 31.56 %, 30.73 %, and 31 %, respectively. The system efficiency remained at approximately 30 % across all scenarios. However, from Sc-1 to Sc-4 (w/o heater), an increase in hydrogen consumption and range was observed. This finding indicates that the total hydrogen consumption and driving range increase as a result of longer operation, while the overall energy conversion efficiency remains nearly constant. The study highlights the importance of active thermal and flow management strategies in optimizing hydrogen usage. While temperature controllers consumed excess energy, hydrogen flow controllers emerged as more efficient, ensuring stable operation and maximizing hydrogen utilization. These findings underscore the potential of integrating advanced thermal management techniques, such as FC waste heat utilization and controlled hydrogen flow, to improve the performance and sustainability of hydrogen-powered hybrid vehicles. This research offers a promising pathway for developing energy-efficient and environmentally friendly transportation systems.