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首页> 外文期刊>Journal of power sources >A thermally coupled metal hydride hydrogen storage and fuel cell system
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A thermally coupled metal hydride hydrogen storage and fuel cell system

机译：热耦合金属氢化物储氢和燃料电池系统

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摘要

This paper examines the ability of metal hydride storage systems to supply hydrogen to a fuel cell with a time varying demand, when the metal hydride tanks are thermally coupled to the fuel cell. A two-dimensional mathematical model is utilized to compare different heat transfer enhancements and storage tank configurations. The scenario investigated involves two metal hydride tanks containing the alloy Ti_(0.98)Zr_(0.02)V_(0.43)Fe_(0.09)Cr_(0.05)Mn_(1.5), located in the air exhaust stream of a fuel cell. Three cases are simulated: a base case with no heat transfer enhancements, a case with external fins attached to the outside of the tank, and a case where an annular tank design is used. For the imposed duty cycle, the base case is insufficient to provide the hydrogen demands of the system, while both the finned and annular cases are able to meet the demands. The finned case yields higher pressures and occupies more space, while the annular case yields acceptable pressures and requires less space. Furthermore, the annular metal hydride tank meets the requirements of the fuel cell while providing a more robust and compact hydrogen storage system.
机译：本文研究了当金属氢化物罐与燃料电池热耦合时，金属氢化物存储系统向氢燃料电池供应氢的能力，该氢燃料电池具有随时间变化的需求。利用二维数学模型来比较不同的传热效果和储罐配置。研究的场景涉及两个金属氢化物罐，它们位于燃料电池的排气流中，其中包含合金Ti_（0.98）Zr_（0.02）V_（0.43）Fe_（0.09）Cr_（0.05）Mn_（1.5）。模拟了三种情况：不增强传热的基本情况，在箱体外部连接有外部散热片的箱体以及采用环形箱体设计的箱体。对于强加的占空比，基本壳体不足以提供系统的氢气需求，而翅片壳体和环形壳体都能够满足需求。翅片盒产生更高的压力并占据更多空间，而环形盒产生可接受的压力且需要更少的空间。此外，环形金属氢化物罐满足了燃料电池的要求，同时提供了更坚固，紧凑的储氢系统。

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