Analysis of Effective Parameters on Hydrogen Desorption From an Industrial Metal Hydride Tank

Authors

Abstract

In present study, the desorption process of hydrogen from an industrial scale metal hydride tank with the thermal jacket system has been simulated. Commercial Fluent 6.3 code is used to solve the set of differential equations. The thermal equilibrium condition is considered between hydrogen gas and metal solid bed. In addition the hydrogen flow obeys the ideal gas condition. The effects of hot water temperature and convective heat transfer coefficient on the desorption process from the porous bed have been investigated. The results show that increasing the two parameters has great effect on desorption time. Specifically, augmentation of convective heat transfer coefficient from 1000 w/m2.k-1 to 4000 w/m2.k-1 yields to 7 percent decrement of discharge time. Desorption time becomes 8 percent shorter when the hot water temperature increases by 10k.

Keywords