Niche applications of metal hydrides and related thermal management issues

Lototskyy, Mykhaylo; Sekhar, B. Satya; Muthukumar, P.; Linkov, Vladimir; Pollet, Bruno G.

doi:10.1016/j.jallcom.2014.12.271

Cited by 54 publications

(26 citation statements)

References 38 publications

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“…More specifically, many reversible H 2 storage devices exploit light intermetallic hydrides, such as AB5 and AB2, reaching hydrogen storage capacities of about 2 wt% [14]. Nonetheless, the hydride formation/hydrogen absorption is an exothermic reaction that generates a quantity of heat that is approximately equal to the absolute value of the reaction enthalpy [15]: the generated heat decreases H 2 absorption rate, reducing the kinetics of the hydride formation. Thus, system performances are largely affected by thermal management of the whole storage [16].…”

Section: Introductionmentioning

confidence: 99%

Optimized Modeling and Design of a PCM-Enhanced H2 Storage

Facci

Lauricella²,

Succi

et al. 2021

Energies

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Thermal and mechanical energy storage is pivotal for the effective exploitation of renewable energy sources, thus fostering the transition to a sustainable economy. Hydrogen-based systems are among the most promising solutions for electrical energy storage. However, several technical and economic barriers (e.g., high costs, low energy and power density, advanced material requirements) still hinder the diffusion of such solutions. Similarly, the realization of latent heat storages through phase change materials is particularly attractive because it provides high energy density in addition to allowing for the storage of the heat of fusion at a (nearly) constant temperature. In this paper, we posit the challenge to couple a metal hydride H2 canister with a latent heat storage, in order to improve the overall power density and realize a passive control of the system temperature. A highly flexible numerical solver based on a hybrid Lattice Boltzmann Phase-Field (LB-PF) algorithm is developed to assist the design of the hybrid PCM-MH tank by studying the melting and solidification processes of paraffin-like materials. The present approach is used to model the storage of the heat released by the hydride during the H2 loading process in a phase change material (PCM). The results in terms of Nusselt numbers are used to design an enhanced metal-hydride storage for H2-based energy systems, relevant for a reliable and cost-effective “Hydrogen Economy”. The application of the developed numerical model to the case study demonstrates the feasibility of the posited design. Specifically, the phase change material application significantly increases the heat flux at the metal hydride surface, thus improving the overall system power density.

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Section: Introductionmentioning

confidence: 99%

Optimized Modeling and Design of a PCM-Enhanced H2 Storage

Facci

Lauricella²,

Succi

et al. 2021

Energies

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“…Lototskyy et al conducted a brief review on heat transfer issues of MH sorption systems. The focus of the study is on the factors responsible for the deterioration of sorption system performance and also proposed some important parameters by which the storage capacity, COP, efficiency, etc of the system can be improved.…”

Section: Introductionmentioning

confidence: 99%

“…Apart from that, the other problem with sorption systems is its low efficiency, ie, a maximum of 0.5 COP can be achieved with single‐stage systems. The solution for this problem is the implementation of multistaging effect or reduction in overall system weight. Apart from that, the overall system cost can be reduced with the development of CO 2 ‐adsorbent–based and NH 3 ‐salt–based sorption systems in which the material cost is relatively low compared with that in MHs.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and heat‐hydrogen transfer analyses of novel multistage hydrogen‐alloy sorption heat pump

2019

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Summary The requirement of simultaneous heating and cooling effects at different zones of a building demands for the development of an energy‐efficient air‐conditioning system for heating and cooling outputs. In order to fulfil this requirement, a novel multistage hydrogen‐alloy–based sorption heat pump (H‐A SHP) for space air‐conditioning is proposed in the present work. The proposed system produces multiple cooling and heating outputs at 20°C and 45°C, respectively, with single heat input at 160°C. A set of MmNi5, La0.8Ce0.2Ni5, MmNi4.4Al0.6, and LaNi4.6Al0.4 metal hydrides (MHs) is chosen to operate at the above‐mentioned temperature range with hydrogen as working fluid. The proposed system can completely eliminate the requirement of conventional compressor because it operates using waste heat, and useful outputs (cooling‐heating) result from reaction enthalpies (MH + H2 interaction). The thermodynamic and heat‐hydrogen transfer analyses of H‐A SHP are carried out through finite volume approach, in which heat and mass transfer equations are solved to foresee the variations in MH bed temperature, hydrogen concentration, and heat interactions during cycle operation as well as the amount of cooling and heating outputs delivered to the air‐conditioning space. The numerical code is validated with experimental pressure‐concentration isotherms (PCIs) measured through Sievert's apparatus. The maximum heat exchange during the cooling and heating processes, at a particular instant of time, is observed as 257.5 and 286.1 W with cooling temperature of 10°C and heating temperature of 53°C, respectively. The thermodynamic performance is estimated as 178.5 kJ of cooling effect, 265.5 kJ of upgraded heat with overall coefficient of performance (COP) of 6.8, and overall specific alloy output of 396.5 W/0.34 kg of alloy.

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“…Recently, Lototsky et al . have discussed different thermal management issues related to metal hydride based thermodynamic applications.…”

Section: Introductionmentioning

confidence: 99%

Metal hydrides for energy applications - classification, PCI characterisation and simulation

Sharma

Kumar

2016

Int. J. Energy Res.

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Summary This short review discusses the classification, pressure concentration isotherm (PCI) characterisation and applications of metal hydrides. Special attention is paid to describe the design criterion and fabrication of Sievert's apparatus and PCI characterisation methods of metal hydrides. Different classes of metal hydrides and their properties are broadly discussed. Also, some of the important applications of metal hydrides are presented. The absorption and desorption PCIs of four Lanthanum based alloys namely La0.9Ce0.1Ni5, La0.8Ce0.2Ni5, LaNi4.7Al0.3 and LaNi4.6Al0.4 are measured using volumetric method in the temperature range of 20 to 80 °C. Later, different PCI simulation models are compared, and Zhou's model is used to simulate the experimentally measured PCIs at different temperatures. It is found that the simulation results are in good agreement with the experimentally measured results. Copyright © 2016 John Wiley & Sons, Ltd.

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Niche applications of metal hydrides and related thermal management issues

Cited by 54 publications

References 38 publications

Optimized Modeling and Design of a PCM-Enhanced H2 Storage

Optimized Modeling and Design of a PCM-Enhanced H2 Storage

Thermodynamic and heat‐hydrogen transfer analyses of novel multistage hydrogen‐alloy sorption heat pump

Metal hydrides for energy applications - classification, PCI characterisation and simulation

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