Thermodynamics and dynamics of the Mg-Fe-H system and its potential for thermochemical thermal energy storage
Thermodynamics and dynamics of the Mg-Fe-H system and its potential for thermochemical thermal energy storage
复制标题
DOI：
10.1016/s0925-8388(02)00308-0
复制
发表时间：
2002-10-28
影响因子：
6.2
通讯作者：
Tesche, B
中科院分区：
文献类型：
--
作者：
Bogdanovic, B;Reiser, A;Tesche, B
可逆的Mg_2FeH_6和Mg_2FeH_6-氢化镁混合体系[EQs.(1)和(2)]被证明是非常适合在500摄氏度左右的热化学热能存储的材料，例如作为太阳能或过剩工业热能的存储。与显热或潜热储存材料(表1)相比，这些系统的特点是具有较高的重量和体积热能密度(表1)，并且在循环测试中具有极好的稳定性。进一步的优点包括：原料价格低廉，通过控制施加的氢气压力，可以自由选择和恒定热传递温度，并且不会随着时间的推移而损失热量。通过TEM-EDX的联合研究，可以在微米或纳米水平上阐明Mg2FeH6的初始形成以及随后的脱氢和再氢化过程的基本特征。(C)2002 Elsevier Science B.V.保留所有权利。
The reversible Mg2FeH6 and the mixed Mg2FeH6-MgH2 hydride systems [Eqs. (1) and (2)] turned out to be highly suitable materials for thermochemical thermal energy storage at around 500 degreesC, for example as the storage of solar or excess industrial heat. The systems are characterized by a high gravimetric and volumetric thermal energy density in comparison to sensible or latent heat storage materials (Table 1) and have excellent stability in cycle tests. Further advantages include low price of the starting materials, a free choice and constancy of the heat delivery temperature by controlling the applied hydrogen pressure, and the absence of heat losses with time. By means of combined TEM-EDX investigations essential features of the initial formation and the subsequent de- and rehydrogenation processes of Mg2FeH6 could be elucidated on a micro- or nanoscale level. (C) 2002 Elsevier Science B.V. All rights reserved.