Study of heat transfer and kinetics parameters influencing the design of heat exchangers for hydrogen storage in high-pressure metal hydrides

Visaria, Milan; Mudawar, Issam; Pourpoint, Timothée L.; Kumar, Sudarshan

doi:10.1016/j.ijheatmasstransfer.2009.12.010

Cited by 77 publications

(53 citation statements)

References 22 publications

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“…The AB5 group has an excellent hydrogenation performance at ambient temperatures but poor hydrogen capacity typically in the range of 1-1.5 wt % [13]. Metal hydrides useful for on-board hydrogen storage and can be broadly categorized as: (1) complex metal hydrides (e.g., NaAlH4) that have low hydriding pressures (20-150 bar), relatively high hydriding temperatures (200-300 °C), and high volumetric capacities; and (2) high pressure metal hydrides (HPMH) that have high hydriding pressures and hydriding temperatures lower than 100 °C but have a low volumetric capacity (2-3 wt %) [14][15][16]. Both these types of metal hydrides require additional mechanisms such as external cooling, high pressure cylinders, etc., that increase the overall system weight and hence the reduced system capacity.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, when hydrogen is introduced into a hydride bed, its atoms fill the pores in the bed and result in even lower conduction rates. The decreased rate of heat transfer in a bed will eventually result in extended hydriding times [14]. Figure 3 shows the effect of the thermal conductivity of the bed on its fill time.…”

Section: Introductionmentioning

confidence: 99%

“…It can be observed that for the typical thermal conductivity of metal hydrides, i.e., 1 W/(m·K), the fill time is significantly higher and can be reduced if the thermal conductivity can be at least doubled. [14]; fill time can be greatly reduced for thermal conductivity higher than 2 W/(m·K).…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Magnetic Field on Thermal-Reaction Kinetics of a Paramagnetic Metal Hydride Storage Bed

2017

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Featured Application: The results of this research are applicable to metal hydride hydrogen storage systems and the onboard hydrogen storage system in the automobile industry.Abstract: A safe and efficient method for storing hydrogen is solid state storage through a chemical reaction in metal hydrides. A good amount of research has been conducted on hydrogenation properties of metal hydrides and possible methods to improve them. Background research shows that heat transfer is one of the reaction rate controlling parameters in a metal hydride hydrogen storage system. Considering that some very well-known hydrides like lanthanum nickel (LaNi 5 ) and magnesium hydride (MgH 2 ) are paramagnetic materials, the effect of an external magnetic field on heat conduction and reaction kinetics in a metal hydride storage system with such materials needs to be studied. In the current paper, hydrogenation properties of lanthanum nickel under magnetism were studied. The properties which were under consideration include reaction kinetics, hydrogen absorption capacity, and hydrogenation time. Experimentation has proven the positive effect of applying magnetic fields on the heat conduction, reaction kinetics, and hydrogenation time of a lanthanum nickel bed. However, magnetism did not increase the hydrogenation capacity of lanthanum nickel, which is evidence to prove that elevated hydrogenation characteristics result from enhanced heat transfer in the bed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Magnetic Field on Thermal-Reaction Kinetics of a Paramagnetic Metal Hydride Storage Bed

2017

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“…Therefore, internal heat transfer enhancements have become more attractive and can roughly divided in two ways: 1) Enhancement of the thermal conductivity of the metal hydride powder by insertion of aluminium foam [13][14][15], copper wire net structure [16] or by creating metal hydride compacts [17][18][19][20], 2) Integration of heat exchangers inside the bed such as embedded heat exchanger tubes [21][22][23], finned tube heat exchangers [24][25][26][27], spiral heat exchangers [28,29] or heat pipes [30].…”

Section: Introductionmentioning

confidence: 99%

Efficient hydrogen storage in up-scale metal hydride tanks as possible metal hydride compression agents equipped with aluminium extended surfaces

Gkanas

Grant

Khzouz

et al. 2016

International Journal of Hydrogen Energy

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The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractIn the current work, a three-dimensional computational study regarding coupled heat and mass transfer during both the hydrogenation and dehydrogenation process in upscale cylindrical metal hydride reactors is presented, analysed and optimized. Three different heat management scenarios were examined at the degree to which they provide improved system performance. The three scenarios were: 1) Plain embedded cooling/heating tubes, 2) transverse finned tubes and 3) longitudinal finned tubes. A detailed optimization study was presented leading to the selection of the optimized geometries. In addition, two different types of hydrides, LaNi5 and an AB2-type intermetallic were studied as possible candidate materials for using as the first stage alloys in a two-stage metal hydride hydrogen compression system. As extracted from the above results, it is clear that the case of using a vessel equipped with 16 longitudinal finned tubes is the most efficient way to enhance the hydrogenation kinetics when using both LaNi5 and the AB2-alloy as the hydride agents. When using LaNi5 as the operating hydride the case of the vessel equipped with 60 embedded cooling tubes presents the same kinetic behaviour with the case of the vessel equipped with 12 longitudinal finned tubes, so in that way, by using extended surfaces to enhance the heat exchange can reduce the total number of tubes from 60 to 12. For the case of using the AB2-type material as the operating hydride the performance of the extended surfaces is more dominant and more effective comparing to the case of using the embedded tubes, especially for the case of the longitudinal extended surfaces.

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“…In order to supply hydrogen to the fuel cell, a safe, durable hydrogen storage tank with high volumetric and gravimetric capacity is required for a highlyefficient fuel cell vehicle. To travel a distance of about 300 miles, a fuel cell vehicle needs to be fueled with 5 kg of hydrogen [1]. Methods that are mainly used for hydrogen storage are pressurization, liquefaction and storage in the form of solid-state hydrogen in metal hydride.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer efficiency improvement in high-pressure metal hydride by modeling approach

Jalalludin¹,

Katayama²,

Kogoshi³

et al. 2014

ijsgce

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Abstractcompared to other storage materials. However, a vast amount of heat is generated during refueling of hydrogen in HPMH, where the heat will slow down or stop the absorption of hydrogen into the storage tank and causes a slow refueling time. Aside from heat generation, usage of heat exchangers for dissipation of heat in HPMH increases the weight and volume of the storage tank. In this paper, a prototype of heat exchanger design from a previous paper is revised, and a new prototype is proposed to improve the heat dissipation efficiency while achieving minimal space of heat exchanger in the system. Three prototypes of heat exchanger design are proposed, and the time taken for complete hydrogen absorption and the required space for heat exchanger are compared with the previous model. From the simulation results, two of the proposed models are proven to achieve a faster hydrogen absorption rate with a lower space area of heat exchangers.

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Study of heat transfer and kinetics parameters influencing the design of heat exchangers for hydrogen storage in high-pressure metal hydrides

Cited by 77 publications

References 22 publications

The Effect of Magnetic Field on Thermal-Reaction Kinetics of a Paramagnetic Metal Hydride Storage Bed

The Effect of Magnetic Field on Thermal-Reaction Kinetics of a Paramagnetic Metal Hydride Storage Bed

Efficient hydrogen storage in up-scale metal hydride tanks as possible metal hydride compression agents equipped with aluminium extended surfaces

Heat transfer efficiency improvement in high-pressure metal hydride by modeling approach

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