Hydrogen storage in branch mini-channel metal hydride reactor: Optimization design, sensitivity analysis and quadratic regression

Wang, Di; Wang, Yuqi; Wang, Feng; Zheng, Shuaishuai; Guan, Sinan; Zheng, Lan; Wu, Le; Fang, Tao; Lv, M.

doi:10.1016/j.ijhydene.2021.05.051

Cited by 25 publications

(3 citation statements)

References 36 publications

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“…The diameter of the cooling tube is reduced to produce a mini channel in the same volume, which can obtain a larger heat transfer area and ensure the amount of MH added. 104,105 Wang et al [106][107][108] proposed a radiant mini-channel MHR (Fig. 8a) with each radiant tube consisting of an axial main tube and several radial lateral branches, in which 77%, 52%, and 37% of the reaction time are saved compared to no heat exchanger, straight tubes and spiral tubes, respectively.…”

Section: Usage Of Mini Channels and Heat Pipesmentioning

confidence: 99%

Review of thermal management technology for metal hydride reaction beds

Miao

Liu

et al. 2023

Sustainable Energy Fuels

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Section: Usage Of Mini Channels and Heat Pipesmentioning

confidence: 99%

Review of thermal management technology for metal hydride reaction beds

Miao

Liu

et al. 2023

Sustainable Energy Fuels

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“…Effect of the Reynolds number of the heat transfer fluid on the hydrogen absorption process. The flow velocity is one of the essential parameters for both hydrogeneration and dehydrogenation because of its ability that affect the turbulence and heat removal or heat supplying regarding hydriding and dehydriding processes 59 . A large flow velocity will generate a turbulent stage and cause faster fluid flow through the HTF tube.…”

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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“…So far, various shapes of fins, such as rectangular [6], circular [7], conical [8], corrugated [9], multilayer [10], tree-shaped [11], and leaf vein [12], etc., are used with tubes for heat transfer enhancement. Some studies proposed novel HTS designs for better performance [13][14][15]. However, most studies optimized the HTS by considering only hydrogen absorption/desorption time.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of Metal Hydride-Based Hydrogen Storage Reactor Using Fin Efficiency Concept

2024

International Conference Proceedings IASET-24, WCBES-24, IABW2M-24, IEMSSH-24 &Amp; IMESH-24 May 13-15, 2024 Istanbul (Turkiye)

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The hydrogenation of metal hydrides (MHs) is a heat-driven mass transfer process. Hence, its rate is determined by the heat transfer rate from the MH reactor. A heat transfer system (HTS) with fins and a cooling tube is one such method to enhance heat transfer. The fin efficiency (FE), hitherto not researched for unsteady processes like the present one, is required for the optimization of the reactor. The present numerical study proposes a new technique to estimate the FE from the temporal temperature profiles in the MH reactor. The effects of fin thickness (FT) and shape are studied. The former is varied from 1 to 7 mm, and the latter is changed to 3 different tapered cross-sections. The FE increases with FT but has a minimal effect after 4 mm, while the fin tapering is found to have no significant influence. A performance evaluation parameter (PEP) is presented to optimize the fin thickness and shape.

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Hydrogen storage in branch mini-channel metal hydride reactor: Optimization design, sensitivity analysis and quadratic regression

Cited by 25 publications

References 36 publications

Review of thermal management technology for metal hydride reaction beds

Review of thermal management technology for metal hydride reaction beds

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

Design Optimization of Metal Hydride-Based Hydrogen Storage Reactor Using Fin Efficiency Concept

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