NUMERICAL SIMULATION OF HEAT AND MASS TRANSFER IN METAL HYDRIDE HYDROGEN ACCUMULATORS OF DIFFERENT COMPLEX DESIGNS

被引：0

作者：

Lazarev, Dmitriy ^{[1
]}

Artemov, Valeriy ^{[1
]}

Yankov, Georgiy ^{[1
]}

Minko, Konstantin ^{[1
]}

机构：

[1] Moscow Power Engn Inst, Moscow, Russia

来源：

PROCEEDINGS OF THE ASME INTERNATIONAL HEAT TRANSFER CONFERENCE - 2010, VOL 6: MICROCHANNELS, NANO, NANOFLUIDS, SPRAY COOLING, POROUS MEDIA | 2010年

关键词：

D O I：

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中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A three-dimensional mathematical model of unsteady heat and mass transfer in porous hydrogen-absorbing media, accounting for presence of "passive" gas admixtures, is developed. New technique for evaluation of effective thermal conductivity of porous medium, which consists of microparticles, is suggested. Effect of "passive" gas admixtures on heat and mass transfer and sorption rate in metal hydride reactor is analyzed. It is shown that decrease of effective thermal conductivity and partial hydrogen pressure under decrease of hydrogen concentration effect on the hydrogen sorption rate considerably. It is disclosed that an intensive 3D natural convection takes place in a gas volume of reactor under certain conditions. Numerical analysis of heat and mass transfer in metal-hydride reactor of hydrogen accumulation systems was done. Sorption of hydrogen in cylindrical reactors with external cooling and central supply of hydrogen are analyzed including reactors with finned active volume and tube-shell reactor with external and internal cooling cartridge matrix. Unsteady three dimensional temperature and concentration fields in solid phase are presented. Integral curves representing the dynamic of sorption and desorption are calculated. Data on efficiency of considered reactors are presented and compared.

引用

页码：921 / 930

页数：10

共 15 条

[1] A three-dimensional mathematical model for absorption in a metal hydride bed [J].