A study of the thermal behavior of a deformable metal-hydride bed

被引：46
作者：
Mellouli, S. [1 ,2 ,3 ]
Askri, F. [1 ,3 ]
Dhaou, H. [1 ]
Jemni, A. [1 ]
Ben Nasrallah, S. [1 ]
机构：
[1] Univ Monastir, Lab Thermal & Energet Syst Studies LESTE, Natl Sch Engn Monastir, Tunis, Tunisia
[2] Univ Sousse, High Sch Sci & Technol Hammam Sousse, Sousse, Tunisia
[3] King Khalid Univ, Dept Mech Engn, Fac Engn, Abha, Saudi Arabia
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2016年 / 41卷 / 03期
关键词：
Hydrogen storage; Deformable metal-hydride bed; Expansion/contraction; Heat and mass transfer; HYDROGEN STORAGE; MASS-TRANSFER; HEAT-EXCHANGER; HOMOGENIZATION METHOD; 2-DIMENSIONAL HEAT; CONDUCTIVITY; OPTIMIZATION; DESORPTION; ABSORPTION; SIMULATION;
D O I：
10.1016/j.ijhydene.2015.10.058
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The main objective of this investigation is to identify the ratio of expansion and contraction during hydrogen sorption process by a direct observation of the volumetric changes of LaNi5 granular bed in a transparent metal-hydride reactor. In addition to this, a two-dimensional mathematical modeling is developed. The originality of this model is that it considers the change in the specific volume of the bed (deformable powder bed). The computational results are validated with the experimental data. This numerical investigation analyses the effects of variation of thermo-physical properties, and geometrical dimensions on heat and mass transfer occurring in the deformable bed. The experimental results indicate a significant change in the specific volume of granular media associated to charging and discharging process, approximately 17.77 vol% and 8.16 vol%, respectively. Also, the validity of the assumption that neglects the change in volume of the bed is discussed. Copyright (c) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1711 / 1724
页数：14
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