利用LBM方法模拟金属氢化物储氢罐内氢气脱附的传热与传质  

Modelling Heat and Mass Transfer for Hydrogen Desorption in Metal Hydride Hydrogen Storage Tanks Using LBM Method

作　　者：蔡江昊 王乃潇 樊小朝 程友良[1,2] CAI Jianghao;WANG Naixiao;FAN Xiaozhao;CHENG Youliang(Department of Power Engineering,North China Electric Power University,Baoding 071003,China;Key Laboratory of Low-Carbon and High-Efficiency Power Generation Technology of Province,North China Electric Power University,Baoding 071003,China;School of Energy Engineering,Xinjiang College of Engineering,Urumqi 830000,China)

机构地区：[1]华北电力大学动力工程系,河北保定071003 [2]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003 [3]新疆工程学院能源工程学院,新疆乌鲁木齐830000

出　　处：《电工技术》2024年第7期17-21,29,共6页Electric Engineering

基　　金：国家自然科学基金“新疆含氢储能耦合煤化工的综合能源系统研究”(编号52266018)。

摘　　要：采用一个二维数学模型来评估金属氢化物储氢罐中氢气脱附过程中的传热和传质。模拟采用了具有D2Q9结构的格子玻尔兹曼方法(LBM),对加热流体温度、出口压力及流体与金属氢化物罐之间的对流传热系数等操作参数进行了研究,以确定它们对脱附过程性能的影响。加热液体的温度对脱附过程有重大影响。随着流体温度的升高,由于床层温度大幅上升,氢气脱附量急剧增加。此外,出口压力的降低也会显著加快脱附速度。在对流系数达到一定量前,氢气脱附会得到加强。This paper employs a two-dimensional mathematical model to analyze heat and mass transfer during hydrogen desorption within a metal hydride hydrogen storage tank.The simulations are conducted using the lattice Boltzmann method(LBM)with a D2Q9 lattice structure.The study delves into the influence of various operational parameters,such as the heating fluid′s temperature,the system′s outlet pressure,and the convective heat transfer coefficients between the fluid and the metal hydride tank,on the overall efficiency of the desorption process.It is observed that the temperature of the heated fluid plays a pivotal role;an increase in this parameter leads to a substantial rise in bed temperature,which in turn dramatically accelerates hydrogen desorption.Moreover,the findings reveal that a decrease in the outlet pressure has a significant effect on hastening the desorption rate.However,it should be noted that hydrogen desorption reaches its peak enhancement only until a specific convection coefficient threshold is achieved.

关 键 词：LaNi_(5) 金属氢化物 格子玻尔兹曼方法 

分 类 号：TG139[一般工业技术—材料科学与工程]