Numerical comparison of heat-fin- and metal-foam-based hydrogen storage beds during hydrogen charging process

Hydrogen discharging and thermal behaviors of ZrCo based hydrogen storage beds equipped with heat-fins or metal-foam

“…The MHB with the higher metal-foam porosity (i.e., 0.98) performed better, indicating that the lower thermal mass design of MHBs using metal-foam is critical to enhance hydrogen desorption performance. This trend is opposite from that of the hydrogen absorption found in our previous study [11], wherein the lower metal-foam porosity design (i.e., 0.9) with the larger thermal mass performed slightly better. The difference is mainly due to the fact that the hydrogen absorption kinetics is faster than that of hydrogen desorption.…”

“…Again, the MHB without the heat-fin or metal-foam exhibits the lowest hydrogen discharging performance due to exhibiting the poorest thermal behavior. Among the metal-foam and heatfin cases, the slowest hydrogen desorption was predicted with the heat-fin, which is different from the hydrogen absorption behaviors found in our previous study [11]. We reported that the best performance during the hydrogen absorption was achieved with the heat-fin, even though the performance differences between the heat-fin and metal-foam designs were small.…”

“…The numerical MHB model and various computational geometries with heat-fins or metal-foams have been described in our [13] previous study [11], and thus only a brief summary of the model assumptions and conservation equations/source terms are repeated here. Fig.…”

“…Despite considerable efforts expended toward MHB design optimization, only a few works have been conducted on the advantages/disadvantages of using these additional components. In our previous study [11], we conducted a numerical comparative study of heat-fin and metalfoam (copper) based MHB designs during exothermic a hydrogen absorption process. In this study, we extend our work to include heat-up and hydrogen desorption processes for the same cases used in our previous study.…”

Modeling and numerical simulation of an industrial scale metal hydride reactor based on CFD‐Taguchi combined method

“…The factors governing heat transfer, like thermal conductivity, can be enhanced using metal foam or ENG Compact. [1][2][3][4] Similarly, the heat transfer area could be increased using fins, water jackets, cooling tubes, 5,6 or other heat transfer enhancement surfaces. The operating parameters such as the mass flow rate of heat transfer fluid (HTF), heat transfer coefficient of surroundings, and HTF temperature can improve the system efficiency.…”