A new MgH2 tank concept using a phase-change material to store the heat of reaction

Garrier, S.; Delhomme, Baptiste; Rango, Patricia de; Marty, Philippe; Fruchart, D.; Miraglia, S.

doi:10.1016/j.ijhydene.2013.05.026

Cited by 119 publications

(59 citation statements)

References 22 publications

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“…with the introduction of expanded graphite [22] and to design a complex heat exchanger in the tank. Depending on the metal hydride nature, they can be ground to very fine particles with a high specific surface area [23,24] or directly produced as nanoparticles [25,26] to improve the sorption kinetics, but at the same time, inducing air and/or moisture sensitivity [27][28][29], requiring consequently a polymer coating to prevent the particle degradation [28,[30][31][32][33].Focusing on metal hydride nanoparticles, the achievement of superstoichiometries may compensate for the additional cost induced by coating, making these systems still economically and technically valuable. These superstoichiometries may be achieved only by ion implantation at adapted temperatures.…”

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confidence: 99%

Polyol Process Coupled to Cold Plasma as a New and Efficient Nanohydride Processing Method: Nano-Ni2H as a Case Study

Haj-Khlifa

Nowak

Beaunier³

et al. 2020

Nanomaterials

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An alternative route for metal hydrogenation has been investigated: cold plasma hydrogen implantation on polyol-made transition metal nanoparticles. This treatment applied to a challenging system, Ni–H, induces a re-ordering of the metal lattice, and superstructure lines have been observed by both Bragg–Brentano and grazing incidence X-ray diffraction. The resulting intermetallic structure is similar to those obtained by very high-pressure hydrogenation of nickel and prompt us to suggest that plasma-based hydrogen implantation in nanometals is likely to generate unusual metal hydride, opening new opportunities in chemisorption hydrogen storage. Typically, almost isotropic in shape and about 30 nm sized hexagonal-packed Ni2H single crystals were produced starting from similarly sized cubic face-centred Ni polycrystals.

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confidence: 99%

Polyol Process Coupled to Cold Plasma as a New and Efficient Nanohydride Processing Method: Nano-Ni2H as a Case Study

Haj-Khlifa

Nowak

Beaunier³

et al. 2020

Nanomaterials

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“…In case this occurs, it should be investigated whether it is possible to decrease the 10 PCM thickness, reducing the extra mass and volume added to the system, while maintaining the same thermal performance. Different thicknesses are here investigated, ranging from 2.5 mm to 50 mm.…”

Section: Thickness Analysismentioning

confidence: 99%

“…A considerably less explored area of study is hydrogen storage. In such a field, research has mainly focused on employing PCMs to absorb the heat that originates during hydrogen fueling in metal hydride tanks for stationary applications [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Integration of phase change materials in compressed hydrogen gas systems: Modelling and parametric analysis

Mazzucco

Rothuizen

Jørgensen

et al. 2016

International Journal of Hydrogen Energy

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A dynamic fueling model is built to simulate the fueling process of a hydrogen tank with an integrated passive cooling system. The study investigates the possibility of absorbing a part of the heat of compression in the high latent-heat material during melting, with the aim of saving the monetary and energy resources spent at the refueling station to cool the gas prior to tank filling. This is done while respecting the technical constraint of keeping the walls below the critical temperature of 85 °C to ensure the mechanical stability of the storage system even when the gas is fueled at ambient temperature. Results show that a 10-mm-thick layer of paraffin wax can absorb enough heat to reduce the adiabatic temperature by 20 K when compared to a standard Type IV tank, but its influence on the hydrogen peak temperature that occurs at the end of refueling is modest. The heat transfer from the gas to the phase change material, mainly occurs after the fueling is completed, resulting in a hydrogen peak temperature higher than 85 °C and a lower fueled mass than a gas-cooled system. Such a mass reduction accounts for 12% with respect to the case of a standard tank system fueled at -40 °C. A parametric analysis that embraces the main thermal properties of the heat-absorbing material as well as the major design parameters is here carried out to determine possible solutions. It is found that the improvement of a single thermal property does not provide any significant benefit and that the most effective strategy consists in augmenting the heat transfer area by employing extended surfaces or the encapsulation technique.Keywords: phase change material; hydrogen storage; hydrogen fueling; dynamic model; heat transfer.International Journal of Hydrogen Energy, Vol. 41, No. 12, 2016, p. 1060-1073 IntroductionRecent interest has raised for phase change materials (PCMs) as attractive options to store the thermal energy coming from intermittent sources and enable a continuous availability of the stored heat. Their use provides considerable advantages when compared to technologies that are based on sensible cooling/heating processes. Indeed, great convenience arises from the possibility of using their high energy storage densities to store large amounts of heat in a reduced space, as well as the capability of absorbing and releasing the heat via isothermal heat transfer. These aspects have made PCMs promising candidates for a large variety of applications, including solar energy storage, air conditioning of buildings and spacecrafts, passive cooling of electronics, textiles and fabrics [1]- [9]. A considerably less explored area of study is hydrogen storage. In such a field, research has mainly focused on employing PCMs to absorb the heat that originates during hydrogen fueling in metal hydride tanks for stationary applications [10], [11].In this study, our interest is to investigate the potential advantages and drawbacks of integrating an adequate PCM into compressed gaseous hydrogen (CHG) storage systems for light duty veh...

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“…Several studies of phase change storage systems have been investigated by many scientists for different applications such as solar energy systems [6e12], building insulation [13,14], etc. However, few works concerning the storage, in a PCM, of the heat released during the hydrogen absorption process in a metal hydride reactor have been studied [15,16]. Therefore, the aim of the present work is to investigate numerically the possibility to store the heat released during the hydrogen absorption process by metal hydrides in order to restore it during the subsequent desorption reaction.…”

Section: Introductionmentioning

confidence: 99%

Heat and mass transfer in a metal hydrogen reactor equipped with a phase-change heat-exchanger

Mâad

Askri

Nasrallah

2016

International Journal of Thermal Sciences

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A new MgH2 tank concept using a phase-change material to store the heat of reaction

Cited by 119 publications

References 22 publications

Polyol Process Coupled to Cold Plasma as a New and Efficient Nanohydride Processing Method: Nano-Ni2H as a Case Study

Polyol Process Coupled to Cold Plasma as a New and Efficient Nanohydride Processing Method: Nano-Ni2H as a Case Study

Integration of phase change materials in compressed hydrogen gas systems: Modelling and parametric analysis

Heat and mass transfer in a metal hydrogen reactor equipped with a phase-change heat-exchanger

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