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Precise dynamic modelling of real-world hybrid solar-hydrogen energy systems for grid-connected buildings.

Atteya, Ayatte I.; Ali, Dallia; Sellami, Nazmi

Authors

Nazmi Sellami



Abstract

Hybrid renewable hydrogen energy systems could play a key role in delivering sustainable solutions for enabling the Net Zero ambition; however, the lack of exact computational modelling tools for sizing the integrated system components and simulating their real-world dynamic behaviour remains a key technical challenge against their widespread adoption. This paper addresses this challenge by developing a precise dynamic model that allows sizing the rated capacity of the hybrid system components and accurately simulating their real-world dynamic behaviour while considering effective energy management between the grid-integrated system components to ensure that the maximum possible proportion of energy demand is supplied from clean sources rather than the grid. The proposed hybrid system components involve a solar PV system, electrolyser, pressurised hydrogen storage tank and fuel cell. The developed hybrid system model incorporates a set of mathematical models for the individual system components. The developed precise dynamic model allows identifying the electrolyser's real-world hydrogen production levels in response to the input intermittent solar energy production while also simulating the electrochemical behaviour of the fuel cell and precisely quantifying its real-world output power and hydrogen consumption in response to load demand variations. Using a university campus case study building in Scotland, the effectiveness of the developed model has been assessed by benchmarking comparison between its results versus those obtained from a generic model in which the electrochemical characteristics of the electrolyser and fuel cell systems were not taken into consideration. Results from this comparison have demonstrated the potential of the developed model in simulating the real-world dynamic operation of hybrid solar hydrogen energy systems for grid-connected buildings while sizing the exact capacity of system components, avoiding oversizing associated with underutilisation costs and inaccurate simulation.

Citation

ATTEYA, A.I., ALI, D. and SELLAMI, N. 2023. Precise dynamic modelling of real-world hybrid solar-hydrogen energy systems for grid-connected buildings. Energies [online], 16(14), article 5449. Available from: https://doi.org/10.3390/en16145449

Journal Article Type Article
Acceptance Date Jul 13, 2023
Online Publication Date Jul 18, 2023
Publication Date Jul 31, 2023
Deposit Date Jul 20, 2023
Publicly Available Date Aug 8, 2023
Journal Energies
Electronic ISSN 1996-1073
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 16
Issue 14
Article Number 5449
DOI https://doi.org/10.3390/en16145449
Keywords Hybrid solar hydrogen energy storage system; PV system; Electrolyser; Fuel cell; Hydrogen storage; Energy management
Public URL https://rgu-repository.worktribe.com/output/2015411

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