摘要
为提高储氢反应器的传热及吸放氢速率,对现有金属氢化物反应器进行了系统的综合分析与评价.基于强化传热传质特性,设计优化出了一种高效的新型椭圆螺旋微管束反应器(ESMBR),其具有结构紧凑、传热效果好、反应速度快及操作方便等特点.对研究的储氢反应器进行了建模,并通过实验验证了该模型的准确性和有效性.通过COMSOL软件对比ESMBR、圆形螺旋微管束反应器(SMBR)和直管微管束反应器(MTBR)的数值模拟结果得出,ESMBR在储氢时具有优异的传热传质性能.进一步的敏感性分析结果表明,ESMBR中椭圆螺旋管结构参数的敏感性顺序为主直径(Dc)>椭圆截面长轴(A)>椭圆截面短轴(B)>节距(Pt)>螺旋角度(α).采用多元价值取向模型对不同的反应器方案进行了系统的分析评估,结果表明:ESMBR的综合优度高达0. 845,对比结果也明显优于其他反应器,在氢能领域将有广阔的应用前景.
Storage and transportation are one of the primary restrictions on the approach involving hydrogen energy.The traditional hydrogen storage methods,including high-pressure gas cylinder and cryogenic liquid tank show unfavorable economy,thus hindering their further industrial application and development.Metal hydrides can reversibly react with hydrogen and accomplish the hydriding/dehydriding process under mild operation conditions,which feature advantages such as large hydrogen storage amount,low operation pressure and energy consumption.This process is expected to replace the conventional hydrogen storage and transportation.Meanwhile,considering the strong endothermal/exothermic effect during hydrogenation/dehydrogenation,the prompt heat removal/support inside the metal hydride reactor is a key parameter for H2 absorption/desorption rate and H2 storage efficiency.To improve the heat transfer and absorption/desorption rates of metal hydride reactor,comprehensive analysis and evaluation were conducted.Based on the heat and mass transfer intensification,a new elliptical spiral mini-tube bundle reactor(ESMBR)with high efficiency was designed and proposed;the reactor possesses numerous features,such as high heat transfer speed,compact structure,high reaction rate,and convenient operation.All the hydrogen storage reactor models were established,and both the model accuracy and effectiveness were experimentally validated.Numerical simulations of ESMBR,spiral mini-tube bundle reactor,and mini-tube bundle reactor were calculated and compared by COMSOL.ESMBR was proven to exhibit favorable heat and mass transfer performance during the H2 storage.Results of further analysis indicate that the sensitivity order of elliptical spiral structure parameters as follows:Dc>A>B>Pt>α.A multielement valued model was used to evaluate the reactor schemes systematically,and the calculation results show the integrated superiority of ESMBR could achieve a value of 0.845.The comparison results indicate that the ESMBR presents an outstanding performance compared with other reactors and features a broad application prospect in the field of hydrogen energy.
作者
李珊珊
张蓝
王玉琪
王迪
李海娣
杨福胜
吴震
张早校
LI Shan-shan;ZHANG Lan;WANG Yu-qi;WANG Di;LI Hai-di;YANG Fu-sheng;WU Zhen;ZHANG Zao-xiao(School of Chemical Engineering,Northwest University,Xi'an 710069,China;School of Chemical Engineeringand Technology,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2019年第5期672-681,共10页
Chinese Journal of Engineering
基金
国家自然科学基金资助项目(21276209)
陕西省自然科学基金资助项目(2017JM2033)
化学工程联合国家重点实验室开放课题资助项目(SKL-ChE-18A02)
关键词
金属氢化物
微管束
反应器
储氢
多元价值取向模型
metal hydride
mini-tube bundle
reactor
hydrogen storage
multi-element value model
