Design of the metal hydride reactors – A review on the key technical issues

Yang, Fusheng; Wang, Geoff; Zhang, Z.X.; Meng, Xiangyu; Rudolph, Victor

doi:10.1016/j.ijhydene.2010.01.053

Cited by 110 publications

(38 citation statements)

References 85 publications

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“…% for a 300 mg sample measured at 101 bar. 39 For comparison, our storage reactor is able to operate in the temperature range from room temperature to 350 • C at pressures between a few mbar up to 75 bar with a storage bed between a few grams up to a few hundred grams. Although the reactor is designed to perform measurements at nonequilibrium conditions, it is possible to determine storage capacities with and error of 0.1 wt.…”

Section: Discussionmentioning

confidence: 99%

“…Although this is a heavy metal hydride, it is recognized that this material has a wide range of practical applicability. 39,45 The reactor is filled in an anaerobic dry glovebox (during filling H 2 O and O 2 levels < 100 ppm) to prevent oxidation and contamination effects. The bed material is contained in the reactor by several micromesh filters (Sika-R 0,5).…”

Section: B Reactor Construction and Specificationsmentioning

confidence: 99%

“…30,31,34,37,38 However, relatively little work has been done on the design and development of a realistic (downscaled) hydrogen storage tank or reactor to make the step from laboratory scale to applications for daily use. 39 Furthermore, for any application, only a high storage capacity is not enough and issues such as ab(de)sorption rate, chemical/mechanical stability, poisoning, heat and mass transport under realistic and cyclic conditions, and last but not least upscaling of the metal hydride synthesis method are equally important.…”

Section: Introductionmentioning

confidence: 99%

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Testing facility for hydrogen storage materials designed to simulate application based conditions

Westerwaal

Nyqvist

Haije

2011

Review of Scientific Instruments

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For the daily use of hydrogen storage materials, not only their intrinsic storage properties are important, but also equally important is the performance under practical conditions. Besides the techniques already available for the fundamental characterization of storage materials, there is a growing need to test storage materials under conditions resembling day-to-day use. For that we developed and tested a downscaled hydrogen storage reactor with which it is possible to monitor the hydrogenation behavior under nonideal conditions. Here we present a characterization of the developed reactor setup which enables a fast screening of storage materials. For characterization and calibration purposes, we use the rather well-documented LaNi 5 -Al alloy as reference. The found experimental results agree well with the properties of LaNi 5 -Al as reported in literature. Our results show that this reactor setup enables an efficient screening of new developed storage alloys under realistic conditions and is therefore complementary to the already existing characterization setups.

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Section: Discussionmentioning

confidence: 99%

Section: B Reactor Construction and Specificationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Testing facility for hydrogen storage materials designed to simulate application based conditions

Westerwaal

Nyqvist

Haije

2011

Review of Scientific Instruments

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“…Several metal hydride cooling prototypes have been developed and tested in Germany [2], China [23], India [3] and Japan [8]. Very recently, two interesting review articles [1,24] have been published giving an overview of the experimental systems which have been developed up to now.…”

Section: State Of the Art Of The Technologymentioning

confidence: 99%

“…-Due to the low gas velocity and moderate temperature, the heat transfer by convection and radiation within the powder bulk can be neglected [2,18,24].…”

mentioning

confidence: 99%

Modelling and analysis of a metal hydride cooling system

Herrero¹

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The work which is presented by J. Payá Herrero, titled "Modelling and analysis of a metal hydride cooling system" has been carried out at the Institute for Energy Engineering under my supervision and assessment.As the modelling and experimental objectives have been reached, I authorise the submission of this PhD work for its evaluation by the corresponding examination board. This PhD thesis consists in the modelling and validation of a metal hydride cooling system. The experimental prototype is located in the institute IKE.In the first place, the hydrogen absorbing materials have been characterized in terms of the static P-C-T properties and of the intrinsic reaction kinetics. In the second place, after this first characterization phase, a completely dynamic model has been developed based on the heat and mass transfer processes which take place in the reactors. The results have been validated with an exhaustive experimental campaign of dynamic cooling tests and the adjustment of the model is very good.Finally, the cooling performance of the system has been improved by means of the model which has enabled the optimization of the operating conditions and of the sorption materials. El presente estudio consiste en el modelado y validación de un sistema de producción de frío basado en la absorción/desorción de hidrógeno en metales.La instalación experimental que se ha modelado se halla en el instituto IKE.En primer lugar, los materiales utilizados se han caracterizado tanto desde el punto de vista de las curvas P-C-T de equilibrio como de la cinética de absorción/desorción de cada aleación. En segundo lugar, se ha desarrollado un modelo completamente dinámico basado en las reacciones de transferencia de calor y masa que ocurren en los reactores. Los resultados se han validado con una amplia gama de medidas de IKE en régimen transitorio, obteniendo un ajuste muy bueno para diferentes ensayos.Finalmente, mediante la utilización del modelo, se han optimizado las condiciones de operación y las propiedades de los materiales, alcanzando así mejores prestaciones en refrigeración.

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