Metal hydride storage tanks real-time state of charge estimation based on nonlinear observer with a non-observable subsystem

Mingrui Chen, Ramon Costa-Castelló, Carles Batlle and Jing Na

Applied Energy, 2025, vol. 399, issue C, No S030626192501178X

Abstract: In this paper, a novel state of charge real-time estimation architecture for metal hydride storage tanks is proposed. Specifically, the state of charge estimation problem is converted into a nonlinear observer design problem. Firstly, the observability of the metal hydride tank model is analyzed and the state space is divided into three regions according to its observability. Secondly, an unknown system dynamic estimator is used to estimate the sorption rate of metal hydride tanks, which only requires information on tank pressure, temperature and flow rate. Thirdly, an observer is designed to estimate the density of hydrogen and metal hydride. Finally, the performance of the proposed estimator is validated using numerical simulations and experimental data.

Keywords: Metal hydride tanks; Uncertain system dynamics estimator; State observer; State of charge estimation (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:399:y:2025:i:c:s030626192501178x

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DOI: 10.1016/j.apenergy.2025.126448

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