Numerical analysis and performance assessment of metal hydride-based hydrogen storage systems

Gambini, Marco; Manno, Michele; Vellini, Michela

doi:10.1016/j.ijhydene.2008.08.006

Cited by 60 publications

(25 citation statements)

References 22 publications

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“…In respect to the dynamic models of MHCSs, many models have been developed in recent years, among others by Gambini [13,28], Gopal and coworkers [3,10], Satheesh et al [29,30].…”

Section: Mathematical Modelsmentioning

confidence: 99%

“…Several dynamical models have already been validated with experimental data for single reactors [11,13,18,19] during an absorption or desorption. In the case of MHCSs, several experimental systems have been presented [6,9], but they have only been compared with model results occasionally [3].…”

Section: Mathematical Modelsmentioning

confidence: 99%

“…Many authors have already reported the importance of hysteresis in the performance of MHCS [13,14,21,28].…”

Section: Hysteresismentioning

confidence: 99%

“…Heat and mass transfer aspects of single reactors have been studied by many authors [11][12][13][14][15], particularly for hydrogen storage applications. Many studies have been recently published by Jemni et al on this matter using spatial models to define the reactions which take place inside the reactors [16][17][18][19][20].…”

mentioning

confidence: 99%

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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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“…In respect to the dynamic models of MHCSs, many models have been developed in recent years, among others by Gambini [13,28], Gopal and coworkers [3,10], Satheesh et al [29,30].…”

Section: Mathematical Modelsmentioning

confidence: 99%

Section: Mathematical Modelsmentioning

confidence: 99%

“…Many authors have already reported the importance of hysteresis in the performance of MHCS [13,14,21,28].…”

Section: Hysteresismentioning

confidence: 99%

mentioning

confidence: 99%

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Modelling and analysis of a metal hydride cooling system

Herrero¹

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“…The aim of THEUS that we propose here is to use the endothermic reaction heat for air-conditioning demand when the metal hydride desorbs hydrogen. Numerical simulations that analyze the heat transfer involving metal hydride in a vessel have been carried out [7]- [8]. In these simulations, the circulating water tube was at the center of the tank or the tank was cooled from outside.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Numerical Simulation Model of the Metal Hydride Tank for the Totalized Hydrogen Energy Utilization System

Maeda¹,

Nishida²,

Hasegawa³

et al. 2012

Journal of International Council on Electrical Engineering

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-Authors have proposed the Totalized Hydrogen Energy Utilization System(THEUS) for load leveling and stabilizing the grid system. THEUS consists of fuel cells, water electrolyzers, hydrogen storage and their auxiliary machinery. The basic operation for load leveling is as follows: In the nighttime, it produces hydrogen through water electrolysis by using low-cost electric power and stores the hydrogen. In the daytime, it conducts fuel cell generation using the stored hydrogen to meet the demand. Hydrogen storage equipment is the core of THEUS. In this paper, the metal hydride tank was chosen as hydrogen storage. The hydrogen desorption process is endothermic reaction. It is possible to use the cool heat for air conditioning. It is necessary to develop a useful numerical simulation code for not only the operation method but also the optimization of the structure of the tank. We developed the simulation code. The validity of the code has been improved by comparing with experimental results. Concretely, the following points were considered. (1)The thermal capacity of the tank.(2)Heat loss to the outside. (3)The copper plate effect. The simulation results become in good agreement with experimental results. And to achieve hydrogen high flow rate, new design tank performance was investigated.

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Characterisation of pressure‐concentration‐temperature profiles for metal hydride hydrogen storage alloys with model development

2023

Energy Storage

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Metal hydride (MH) alloys have been applied to hydrogen storage and various energy conversion systems such as refrigeration, heat pump and heat transformer. However, to facilitate and efficiently investigate efficiently a particular application, an MH alloy must firstly be characterised with a purposely built test facility to measure profiles of pressure, MH hydrogen concentration and temperature (PCT). Obtaining detailed PCT profiles or curves could be an arduous and expensive task as each isothermal hydrogen absorption or desorption line requires hundreds of measurement points. It is thus desirable to develop an accurate correlative model for the PCT profiles with limited measurements of thermophysical property data for the purpose of characterisation of each MH alloy. This correlative model or characterisation process has been developed and is described in detail in this article. The correlative PCT MH alloy profiles can cover all applicable hydrogen storage phase regions of α, α + β and β as well as the phase transition dome curve and critical point such that a PCT phase diagram for a particular MH alloy can be depicted and characterised. As an application example, the correlative model is applied to predict an MH alloy's hydrogen storage capacity and hysteresis at a specific MH temperature. It has been discovered that each of these two parameters shows comparative trends in variation with reduced temperature. Correspondingly, for each parameter, a correlative function with reduced temperature has been produced. The MH alloy characterisation process is an essential step towards a detailed dynamic MH energy system modelling, simulation and optimisation as well as experimental investigation.

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Numerical analysis and performance assessment of metal hydride-based hydrogen storage systems

Cited by 60 publications

References 22 publications

Modelling and analysis of a metal hydride cooling system

Modelling and analysis of a metal hydride cooling system

Improvement of Numerical Simulation Model of the Metal Hydride Tank for the Totalized Hydrogen Energy Utilization System

Characterisation of pressure‐concentration‐temperature profiles for metal hydride hydrogen storage alloys with model development

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