The effect of bed roughness uncertainty on tidal stream power estimates for the Pentland Firth
| Autor: | Alistair G.L. Borthwick, M. J. Kreitmair, Scott Draper, T. S. van den Bremer, Thomas A. A. Adcock |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Bed roughness
020209 energy 02 engineering and technology 01 natural sciences bed roughness 010305 fluids & plasmas Engineering 0103 physical sciences 0202 electrical engineering electronic engineering information engineering uncertainty lcsh:Science Stream power Hydrology Multidisciplinary business.industry tidal power Tidal current renewable energy bottom friction Power (physics) Renewable energy Firth Environmental science Resource assessment resource assessment lcsh:Q business Tidal power Research Article |
| Zdroj: | Royal Society Open Science, Vol 7, Iss 1 (2020) Kreitmair, M J, Adcock, T A A, Borthwick, A G L, Draper, S & Van Den Bremer, T S 2020, ' The effect of bed roughness uncertainty on tidal stream power estimates for the Pentland Firth ', Royal Society Open Science, vol. 7, no. 1, pp. 191127 . https://doi.org/10.1098/rsos.191127 Royal Society Open Science |
| ISSN: | 2054-5703 |
| Popis: | Uncertainty affects estimates of the power potential of tidal currents, resulting in large ranges in values reported for sites such as the Pentland Firth, UK. Kreitmair et al. (2019, R. Soc. open sci. 6 , 180941. ( doi:10.1098/rsos.191127 )) have examined the effect of uncertainty in bottom friction on tidal power estimates by considering idealized theoretical models. The present paper considers the role of bottom friction uncertainty in a realistic numerical model of the Pentland Firth spanned by different fence configurations. We find that uncertainty in removable power estimates resulting from bed roughness uncertainty depends on the case considered, with relative uncertainty between 2% (for a fully spanned channel with small values of mean roughness and input uncertainty) and 44% (for an asymmetrically confined channel with high values of bed roughness and input uncertainty). Relative uncertainty in power estimates is generally smaller than (input) relative uncertainty in bottom friction by a factor of between 0.2 and 0.7, except for low turbine deployments and very high mean values of friction. This paper makes a start at quantifying uncertainty in tidal stream power estimates, and motivates further work for proper characterization of the resource, accounting for uncertainty inherent in resource modelling. |
| Databáze: | OpenAIRE |
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