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Abstract / Description of output
Tides exhibit variability over time. This study proposes a methodology for selecting a representative timeframe for tidal range energy analyses, when constrained to a typical, short-term, lunar month-long period. We explore how the selection of particular timeframes skews findings of energy assessments, especially for cross-comparisons across studies. This exercise relies on metrics assessing the magnitude and variability of a tidal signal relative to longer-term nodal cycle quantities.
Results based on UK tide gauges highlight that tide characteristics exhibit significant variations temporally within a lunar month. Relative to quantities of tidal elevation standard deviation or average potential energy, values can vary by 15% and 30% respectively. For each lunar month, interquartile range values for tidal height and energy can deviate by 45% from the mean. Spatially, we observe a satisfactory correlation only once sufficient constituents are considered. In that case, a representative timeframe can be identified for comparative tidal range scheme assessments within the same tidal system. In contrast, timeframes with high tidal variability distort individual project performance, particularly under fixed operation. The methodology, if integrated to marine energy resource and environmental impact assessments, would deliver marine power generation insights over a project lifetime that enable robust design comparisons across sites.
Results based on UK tide gauges highlight that tide characteristics exhibit significant variations temporally within a lunar month. Relative to quantities of tidal elevation standard deviation or average potential energy, values can vary by 15% and 30% respectively. For each lunar month, interquartile range values for tidal height and energy can deviate by 45% from the mean. Spatially, we observe a satisfactory correlation only once sufficient constituents are considered. In that case, a representative timeframe can be identified for comparative tidal range scheme assessments within the same tidal system. In contrast, timeframes with high tidal variability distort individual project performance, particularly under fixed operation. The methodology, if integrated to marine energy resource and environmental impact assessments, would deliver marine power generation insights over a project lifetime that enable robust design comparisons across sites.
Original language | English |
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Pages (from-to) | 125-141 |
Journal | Renewable Energy |
Volume | 205 |
Early online date | 18 Jan 2023 |
DOIs | |
Publication status | Published - Mar 2023 |
Keywords / Materials (for Non-textual outputs)
- Energy assessment
- Resource assessment
- Tidal range
- Tidal range energy
- Tide variability
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Dive into the research topics of 'Sensitivity of tidal range assessments to harmonic constituents and analysis timeframe'. Together they form a unique fingerprint.-
CDT WAMSS: Centre For Doctoral Training In Wind And Marine Energy Systems And Structures
O'Bradaigh, C., Viola, I. M., Venugopal, V. & McCarthy, E.
1/09/19 → 29/02/28
Project: Research
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ILIAD: INTEGRATED DigitaL Framework FOR Comprehensive MARITIME DATA AND INFORMATION SERVICES
1/02/22 → 1/02/25
Project: Research
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Hydrodynamics-informed multi-objective control optimisation for tidal power plant systems integration
Angeloudis, A., Pappas, K., Van Der Weijde, H. & Kolios, A.
11/01/21 → 10/07/24
Project: Research Collaboration with external organisation