基于热化学储热的金属氢化物储氢性能研究
Performance Study of Metal Hydride Hydrogen Storage Based on Thermochemical Heat Storage
常浩 1陶于兵1
作者信息
- 1. 西安交通大学能源与动力工程学院,热流科学与工程教育部重点实验室,西安,710049
- 折叠
摘要
建立了由MgH2和Mg(OH)2组成的绝热储氢反应器二维轴对称数学模型,提出了夹层式反应器结构并与传统套筒式反应器进行对比,研究了氢气压力及Mg(OH)2导热系数对夹层式反应器储氢蓄热性能的影响.结果表明,夹层式反应器与传统套筒式反应器相比具有更大传热面积和更小传热热阻,从而具有更快的传热和储氢速率.增加氢气压力,可以强化储氢材料与储热材料之间的传热,加快储氢储热速率.此外,提高Mg(OH)2导热系数是进一步提高夹层式MgH2-Mg(OH)2反应器性能的关键.
Abstract
A two-dimensional axisymmetric mathematical model was developed for an adiabatic hydrogen storage reactor based on the magnesium hydride and magnesium hydroxide.A sandwich reactor was proposed and compared with conventional sleeve reactor,the effect of hydrogen pressure and Mg(OH)2 thermal conductivity on hydrogen storage and thermal storage performance of the sandwich reactor was investigated.The results show that the sandwich reactor exhibits a larger heat transfer area and lower heat transfer thermal resistance than conventional sleeve reactor,which results in faster heat transfer and hydrogen storage rates.Increasing the hydrogen pressure can enhance the heat transfer between metal hydride and thermal storage material and accelerates the hydrogen and heat storage rates.In addition,improving the thermal conductivity of Mg(OH)2 is essential to further improve the performance of the sandwich MgH2-Mg(OH)2 reactor.
关键词
金属氢化物/储氢/热化学储热材料/强化传热Key words
metal hydride/hydrogen storage/thermochemical thermal storage material/heat trans-fer enhancement引用本文复制引用
基金项目
国家自然科学基金资助(51876160)
国家自然科学基金资助(U22A20212)
出版年
2024
NETL
NSTL
万方数据