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Assessing the sensitivity of tidal range energy models to water level accuracy

Hanousek, Nicolas ORCID: and Ahmadian, Reza ORCID: 2022. Assessing the sensitivity of tidal range energy models to water level accuracy. Presented at: IAHR 39th World Congress, Granada, Spain, 19-24 June 2022. Published in: Ortega-Sánchez, Miguel ed. Proceedings: 39th IAHR World Congress. IAHR, pp. 4688-4697. 10.3850/IAHR-39WC252171192022369

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Tidal range energy has long been considered for contribution to a low-carbon electricity mix, with schemes in operation for over half a century, generating dispatchable, predictable, energy. Proposed schemes are often modelled using simplified 0D models in the optimisation stages, taking a few key inputs to describe the operation of a tidal range scheme. Fundamental among these is the external water level, typically extracted from other models or harmonic extraction. To assess the possible variation in energy outputs that can be incurred from an erroneous water level, a set of base outputs for two tidal range schemes were determined using a combination of configurations. A set of error forms were identified, applied to the base water levels, and statistical parameters identified from the literature used to provide a set of erroneous water level sets within the reported accuracy. The tidal range schemes were then run using these mutated time series and the change in performance to the base condition was calculated. The models showed significant change in financial yield for the period with the error passing the criteria previously used, demonstrating the need for additional methods to assess the errors. The tests found that the tidal range schemes do not have a particular operating mode that is more resilient or susceptible to an inaccurate water level series, although, of the chosen schemes, one was more varied, indicating that future work may indicate a physical characteristic leading to a more consistent energy estimate.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: IAHR
ISBN: 9789083261218
ISSN: 2521-716X
Funders: WISE CDT - EPSRC EP/L016214/1
Date of First Compliant Deposit: 24 May 2023
Date of Acceptance: 2022
Last Modified: 24 Jun 2023 01:30

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