Design and computational analysis of a metal hydride hydrogen storage system with hexagonal honeycomb based heat transfer enhancements-part A

Afzal, Mahvash; Sharma, Pratibha

doi:10.1016/j.ijhydene.2021.01.135

Cited by 36 publications

(7 citation statements)

References 52 publications

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“…Afzal M. and Sharma P. [ 155 , 156 ] investigated a metal hydride reactor containing about 50 kg La 0.9 Ce 0.1 Ni 5 using a numerical simulation method. A standard pipe size with a nominal diameter of 6 inches was chosen, which gives an internal diameter of 154.06 mm and an external diameter of 168.28 mm.…”

Section: Heat Exchangersmentioning

confidence: 99%

State of the Art in Development of Heat Exchanger Geometry Optimization and Different Storage Bed Designs of a Metal Hydride Reactor

et al. 2023

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The efficient operation of a metal hydride reactor depends on the hydrogen sorption and desorption reaction rate. In this regard, special attention is paid to heat management solutions when designing metal hydride hydrogen storage systems. One of the effective solutions for improving the heat and mass transfer effect in metal hydride beds is the use of heat exchangers. The design of modern cylindrical-shaped reactors makes it possible to optimize the number of heat exchange elements, design of fins and cooling tubes, filter arrangement and geometrical distribution of metal hydride bed elements. Thus, the development of a metal hydride reactor design with optimal weight and size characteristics, taking into account the efficiency of heat transfer and metal hydride bed design, is the relevant task. This paper discusses the influence of different configurations of heat exchangers and metal hydride bed for modern solid-state hydrogen storage systems. The main advantages and disadvantages of various configurations are considered in terms of heat transfer as well as weight and size characteristics. A comparative analysis of the heat exchangers, fins and other solutions efficiency has been performed, which makes it possible to summarize and facilitate the choice of the reactor configuration in the future.

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Section: Heat Exchangersmentioning

confidence: 99%

State of the Art in Development of Heat Exchanger Geometry Optimization and Different Storage Bed Designs of a Metal Hydride Reactor

et al. 2023

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“…The honeycomb metal structure resembles ns, which enhances heat transport during the reaction. Afzal et al 121,122 constructed a MHR with a hexagonal honeycomb heat transfer enhancement network (Fig. 10a) by adding 50 kg MH, which can achieve 90% hydrogenation (about 600 g H 2 ) in 7200 s. It provides equivalent volumetric efficiency while signicantly reducing the system weight compared to other large hydrogen storage devices.…”

Section: Other Structural Designsmentioning

confidence: 99%

Review of thermal management technology for metal hydride reaction beds

Miao

Liu

et al. 2023

Sustainable Energy Fuels

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“…Thus, this generates a greater driving force for hydrogen absorption kinetic 25 . At the initial moment, the hydrogen is rapidly absorbed because of the greater difference between the equilibrium pressure and exerted pressure 57 . With loading pressure at 3.0 MPa, 18% of the hydrogen is rapidly stored within the first 10 s. The hydrogen is stored at 90% of the reactor at the final stage with 15,460 s. However, the absorption time is significantly reduced by 32% from the loading pressure at 1.2 to 1.8 MPa.…”

Section: Performance Comparisons Between the Mh Reactors With Helical...mentioning

confidence: 99%

Design optimization of a magnesium-based metal hydride hydrogen energy storage system

Larpruenrudee

Bennett

et al. 2022

Sci Rep

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Metal hydrides (MH) are known as one of the most suitable material groups for hydrogen energy storage because of their large hydrogen storage capacity, low operating pressure, and high safety. However, their slow hydrogen absorption kinetics significantly decreases storage performance. Faster heat removal from MH storage can play an essential role to enhance its hydrogen absorption rate, resulting in better storage performance. In this regard, the present study aims to improve heat transfer performance to positively impact the hydrogen absorption rate of MH storage systems. A novel semi-cylindrical coil is first designed and optimized for hydrogen storage and embedded as an internal heat exchanger with air as the heat transfer fluid (HTF). The effect of novel heat exchanger configurations is analyzed and compared with normal helical coil geometry, based on various pitch sizes. Furthermore, the operating parameters of MH storage and HTF are numerically investigated to obtain optimal values. ANSYS Fluent 2020 R2 is utilized for the numerical simulations. Results from this study demonstrate that MH storage performance is significantly improved by using a semi-cylindrical coil heat exchanger (SCHE). The hydrogen absorption duration reduces by 59% compared to a normal helical coil heat exchanger. The lowest coil pitch from SCHE leads to a 61% reduction of the absorption time. In terms of operating parameters for the MH storage with SCHE, all selected parameters provide a major improvement in the hydrogen absorption process, especially the inlet temperature of the HTF.

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Design and computational analysis of a metal hydride hydrogen storage system with hexagonal honeycomb based heat transfer enhancements-part A

Cited by 36 publications

References 52 publications

State of the Art in Development of Heat Exchanger Geometry Optimization and Different Storage Bed Designs of a Metal Hydride Reactor

State of the Art in Development of Heat Exchanger Geometry Optimization and Different Storage Bed Designs of a Metal Hydride Reactor

Review of thermal management technology for metal hydride reaction beds

Design optimization of a magnesium-based metal hydride hydrogen energy storage system

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