AB_(5)型固态储氢合金系统吸氢过程模拟研究  

Simulation Study on Hydrogen Absorption Process of AB_(5) Type Solid Hydrogen Storage Alloy System

作　　者：唐小龙 燕泽英 潘青 李力军 王昕雨 许嘉威 赵强 Tang Xiaolong;Yan Zeying;Pan Qing;Li Lijun;Wang Xinyu;Xu Jiawei;Zhao Qiang(National Fuel Cell Technology Innovation Center,Weifang Shandong 261061;Weichai Power Co.,Ltd.,Weifang Shandong 261061)

机构地区：[1]国家燃料电池技术创新中心,山东潍坊261061 [2]潍柴动力股份有限公司,山东潍坊261061

出　　处：《中外能源》2024年第9期26-32,共7页Sino-Global Energy

基　　金：“十四五”国家重点研发计划“氢能技术”重点专项项目“车载复合材料储氢气瓶服役检测监测与诊断评估技术”(编号:2021YFB4000800)

摘　　要：以LaNi_(5)为固态储氢合金材料,将储氢合金最大吸氢量固定在1.97g,建立配置翅片式及螺旋式换热器的两种固态储氢三维数学模型,模拟其吸氢过程中合金温度和质量储氢密度的变化情况,研究不同换热器结构和冷却水流速下固态储氢反应器的传热性能及其吸氢性能差异。结果表明:冷却水沿换热器流道吸热逐渐升温,对流经区域合金吸氢速率的增幅作用逐渐减弱。反应器内部配置换热器可加速合金冷却、提高吸氢效率,且反应器内温度、密度云图均出现分层现象,即入口侧温度低、储氢密度高,出口侧温度高、储氢密度低。当冷却水流速较慢时,冷却水沿流道吸热充分,影响反应器吸氢速率的主要因素为换热面积,换热面积越大,系统散热性能越好,因此翅片反应器吸氢速率更快;当冷却水流速较快时,会出现部分冷却水来不及充分吸收热量就从出口流出的情况,影响反应器吸氢速率的主要因素转变为换热器流道长度,流道越长,系统散热性能越好,因此螺旋反应器的吸氢速率更高。Using LaNi_(5) as the solid hydrogen storage alloy material,the maximum hydrogen absorption of the hydrogen storage alloy was fixed at 1.97g,and two three-dimensional mathematical models of solid hydrogen storage with finned and spiral heat exchangers were established to simulate the changes in alloy temperature and mass hydrogen storage density during hydrogen absorption.The heat transfer performance and hydrogen absorption performance of solid-state hydrogen storage reactors with different heat exchanger structures and cooling water flow rates were studied.The results show that the cooling water gradually heats up along the flow path of the heat exchanger,and the effect on the increase of hydrogen absorption rate of the alloy in the flow area is gradually weakened.The heat exchanger in the reactor can accelerate the cooling of alloy and improve the hydrogen absorption efficiency,and the temperature and density cloud maps in the reactor are stratified,that is,the inlet side has low temperature and high hydrogen storage density while the outlet side has high temperature and low hydrogen storage density.When the flow rate of cooling water is low,the cooling water fully absorbs heat along the flow channel,and the main factor affecting the hydrogen absorption rate of reactor is heat transfer area.The larger the heat transfer area,the better the heat dissipation performance of the system,so the hydrogen absorption rate of fin reactor is higher.When the flow rate of cooling water is high,part of the cooling water flows out from the outlet before fully absorbing heat,and the main factor affecting the hydrogen absorption rate of reactor is the length of heat exchanger flow channel.The longer the flow channel,the better the heat dissipation performance of the system,so the hydrogen absorption rate of spiral reactor is higher.

关 键 词：储氢合金 换热器结构 合金温度 储氢密度 传热性能 吸氢速率 

分 类 号：TG139.7[一般工业技术—材料科学与工程]