Adoption of triply periodic minimal surface structure for effective metal hydride-based hydrogen storage
Adoption of triply periodic minimal surface structure for effective metal hydride-based hydrogen storage
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采用三周期最小表面结构进行有效的金属氢化物储氢
DOI：
10.1016/j.energy.2022.125399
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发表时间：
2022
期刊：
影响因子：
9
通讯作者：
Muhammad Aziz
中科院分区：
文献类型：
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作者：
L. A. Lesmana;Muhammad Aziz
金属氢化物（MH）由于其稳定性、相对低的温度和压力以及高体积氢密度而高度有效地用于储存氢。然而，由于MH的重量，它们的重量密度低，导致移动性应用的潜力低，除非反应器还充当主体框架，从而补偿轻重量。三周期最小表面（TPMS）结构作为具有扩展单位体积表面性能的热交换器（HE）和设计用于承受机械载荷的加强结构显示出巨大的潜力。因此，这些结构被认为是有前途的应用作为氢载体，特别是在MH基储氢。本研究旨在使用TPMS结构开发基于MH的储氢。此外，建立了一个数学模型，分析和改善其性能的吸放氢速率。利用已有的实验数据对数学模型的分析进行了验证。并与自然对流冷却方式进行了比较。同时，采用有限元分析方法，对现有结构设计方案在承受工作压力和载荷方面的能力进行了评估。这项研究的重要发现是，所提出的结构被证明具有更高的储氢性能，包括密度和充放氢性能。此外，还发现改善冷却条件可以提高吸收率。强制对流（传热系数为500 W/m2·K）似乎是一种较好的冷却解决方案，需要低能耗并提供足够的冷却。通过使用这种冷却条件与所提出的TPMS反应器设计，90%的氢在2000 s内被吸收。自然冷却几乎需要两倍的时间。还发现，具有壁厚为1 mm设计的TPMS结构的反应器可以承受MH工作压力条件和5000 N的压缩载荷。基于这一发现，基于TPMS的结构可以被认为是一种有前途的新型储氢方法。
Metal hydrides (MHs) are highly effective for storing hydrogen because of their stability, relatively low temperature and pressure, and high volumetric hydrogen density. However, their gravimetric density is low because of the weights of the MHs, leading to a low potential for mobility applications unless the reactor also acts as a body frame, thereby compensating for the light weight. Triply periodic minimal surface (TPMS) structures show great potential as heat exchangers (HEs) with extended surface properties per volume and reinforced structures designed to bear mechanical loads. Therefore, these structures are considered promising for application as hydrogen carriers, especially in MH-based hydrogen storage. This study aims to develop MH-based hydrogen storage using a TPMS structure. Furthermore, a mathematical model was developed to analyze and improve its performance in terms of the hydrogen absorption and desorption rates. The analysis using the mathematical model was validated with existing experimental data. Different cooling conditions were compared with natural convection. Moreover, finite element analysis was applied to evaluate the capability of the current structure design in withstanding the working pressure and load. This study's important finding is that the propose structure is proven to have higher hydrogen storage performance, including density and hydrogen charging and discharging performances. In addition, it is also found that improving the cooling conditions could increase the absorption rate. Forced convection (with a heat-transfer coefficient of 500 W/m2·K) seems to be a preferable cooling solution that requires low energy consumption and provides sufficient cooling. By using this cooling condition with the proposed TPMS reactor design, 90% of hydrogen is absorbed within 2000 s. Natural cooling requires almost double that time. It was also found that a reactor with a TPMS structure with a 1 mm wall thickness design could withstand MH working pressure conditions and a compression load of 5000 N. Based on this finding, the TPMS-based structure can be considered as a promising novel way of storing hydrogen for mobility applications.