Hybrid thermal management across operating windows for metal hydride hydrogen storage vessels: A staged numerical study
International Journal of Hydrogen Energy, cilt.272, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 272
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.ijhydene.2026.157247
- Dergi Adı: International Journal of Hydrogen Energy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, Chemical Abstracts Core, Chimica, Compendex, Environment Index, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Heat-transfer enhancement, Hydrogen absorption, Hydrogen storage, Metal hydride, Thermal management
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
In this study, the thermal and kinetic performance of a metal hydride-based hydrogen storage vessel is investigated using a 2D numerical model and through a sequential approach to developing a thermal management system. The combined influences of different cooling techniques, namely an external cooling jacket, an internal cooling channel, fins, and expanded natural graphite (ENG), on system performance are examined to determine the contribution of each solution to improving the vessel's performance. A baseline design with only an external cooling jacket reaches 90% storage in about 182 s, with a peak bed temperature near 53 °C. Adding an internal cooling channel reduces this time to roughly 118 s and the maximum temperature to about 51 °C, while incorporating fins further cuts the charging time to around 104 s. The best performance arises from a hybrid layout that integrates an external jacket, internal channel, fins, and an ENG-enhanced bed, achieving 90% uptake in about 66 s and limiting the peak temperature to roughly 43 °C. Parametric simulations show that higher inlet pressure and stronger coolant cooling both accelerate absorption but raise thermal loads, highlighting that coordinated hybrid cooling and operating windows are crucial for fast yet thermally safe metal hydride storage. Furthermore, analysis of the temperature distribution contours and the hydrogen-to-metal ratio revealed that staged improvements in thermal management reduce temperature gradients, homogenize the temperature of the bed, and accelerate the absorption reaction throughout the bed.