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Development of Heat Storage Packed Beds Using Hydrogen Storage Alloy

储氢合金蓄热填充床的研制

基本信息

批准号：
06453083
负责人：
YAGI Jun-ichiro
金额：
$ 3.39万
依托单位：
TOHOKU University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06453083/
关键词：
Hydrogen Storage Alloy Heat Storage by Reaction Packed Bed Waste Heat Recovery Single Pellet Reaction Rate Microencapsulation Thermal Conductivity 蓄熱単一球ペレットエネルギー変換反応速度論伝熱機能性材料

项目摘要

Thermophysical properties and cycling strength of a compact of copper-microencapsulated magnesium-nickel alloy have been studied for differnent fabrication conditions. In Preparing the compact. the conditions of copper content (film thickness). loading pressure. loading hold time and pressing method were changed to assess their effect on thermal conductivity/diffusivity and strength against hydrogen absorption-desorption cycling. Thermal conductivity of the Cu-coated compact was shown to increase significantly compared with the Cu-free one : however, very significantly, thermal conductivity did not depend on copper content of the compact at all. Heavy loading pressure for compacting also increased thermal diffusivity due to an increase of contacted area among particles within the compact. However. the compact showed viscoelastic behavior : namely. it took as long as 1.8 ks until thermal diffusivity reached a constant value under a fixed loading pressure. Upon hydrogen absorption-desorption cycling the Cu-coated compacts did not crack. even after 200 cycles. while the Cu-free compacts broke easily within 100 cycles. These results show the possibility for the practical use of hydrogen storage alloy compacts with less copper microencapsulation.

研究了不同制备条件下铜微胶囊镁镍合金压坯的热物理性能和循环强度。在准备契约的过程中。铜含量(膜厚)的条件。装载压力。改变了加载保持时间和压制方法，以评估它们对导热系数/扩散系数和抗吸放氢循环强度的影响。与不镀铜的压坯相比，涂铜压坯的导热系数显著提高：但非常显著的是，压坯的导热系数与压坯中的铜含量无关。由于压坯内颗粒之间的接触面积增加，压实的重载压力也增加了热扩散率。然而。压坯表现出粘弹性行为：即。在固定的加载压力下，热扩散率达到恒定值需要长达1.8k的时间。在吸放氢循环过程中，镀铜压坯未出现裂纹。即使是在200次循环之后。而无铜压坯在100次循环内很容易断裂。这些结果表明，铜微胶囊化程度较低的储氢合金压坯具有实际应用的可能性。