The potential of advanced scatterometer (ASCAT) 12.5 km coastal observations for offshore wind farm site selection in Irish waters

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dc.contributor.author Remmers, Tiny
dc.contributor.author Cawkwell, Fiona
dc.contributor.author Desmond, Cian J.
dc.contributor.author Murphy, Jimmy
dc.contributor.author Politi, Eirini
dc.date.accessioned 2019-05-13T11:24:59Z
dc.date.available 2019-05-13T11:24:59Z
dc.date.issued 2019
dc.identifier.citation Remmers, T., Cawkwell, F., Desmond, C., Murphy, J. and Politi, E., 2019. The Potential of Advanced Scatterometer (ASCAT) 12.5 km Coastal Observations for Offshore Wind Farm Site Selection in Irish Waters. Energies, 12(2),(16pp), 206. DOI: 10.3390/en12020206 en
dc.identifier.volume 12 en
dc.identifier.issued 2 en
dc.identifier.startpage 1 en
dc.identifier.endpage 16 en
dc.identifier.issn 1996-1073
dc.identifier.uri http://hdl.handle.net/10468/7884
dc.identifier.doi 10.3390/en12020206 en
dc.description.abstract The offshore wind industry has seen unprecedented growth over the last few years. In line with this growth, there has been a push towards more exposed sites, farther from shore, in deeper water with consequent increased investor risk. There is therefore a growing need for accurate, reliable, met-ocean data to identify suitable sites, and from which to base preliminary design and investment decisions. This study investigates the potential of hyper-temporal satellite remote sensing Advanced Scatterometer (ASCAT) data in generating information necessary for the optimal site selection of offshore renewable energy infrastructure, and hence providing a cost-effective alternative to traditional techniques, such as in situ data from public or private entities and modelled data. Five years of the ASCAT 12.5 km wind product were validated against in situ weather buoys and showed a strong correlation with a Pearson coefficient of 0.95, when the in situ measurements were extrapolated with the log law. Temporal variations depicted by the ASCAT wind data followed the same inter-seasonal and intra-annual variations as the in situ measurements. A small diurnal bias of 0.12 m s−1 was observed between the descending swath (10:00 to 12:00) and the ascending swath (20:30 to 22:30), indicating that Ireland’s offshore wind speeds are slightly stronger in the daytime, especially in the nearshore areas. Seasonal maps showed that the highest spatial variability in offshore wind speeds are exhibited in winter and summer. The mean wind speed extrapolated at 80 m above sea level showed that Ireland’s mean offshore wind speeds at hub height ranged between 9.6 m s−1 and 12.3 m s−1. To best represent the offshore wind resource and its spatial distribution, an operational frequency map and a maximum yield frequency map were produced based on the ASCAT wind product in an offshore zone between 20 km and 200 km from the coast. The operational frequency indicates the percentage of time during which the observed local wind speed is between cut-in (3 m/s) and cut-out (25 m/s) for a standard turbine. The operational frequency map shows that the frequency of the wind speed within the cut-in and cut-off range of wind turbines was between 92.4% and 97.2%, while the maximum yield frequency map showed that between 40.6% and 59.5% of the wind speed frequency was included in the wind turbine rated power range. The results showed that the hyper-temporal ASCAT 12.5 km wind speed product (five consecutive years, two observations daily per satellite, two satellites) is representative of wind speeds measured by in situ measurements in Irish waters, and that its ability to depict temporal and spatial variability can assist in the decision-making process for offshore wind farm site selection in Ireland en
dc.description.sponsorship European Regional Development Fund (INTERREG Atlantic Area Project ARCWIND) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher MDPI en
dc.relation.uri https://www.mdpi.com/1996-1073/12/2/206/htm
dc.rights © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. en
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en
dc.subject Ireland en
dc.subject ASCAT satellite en
dc.subject Offshore wind energy en
dc.subject Operational frequency en
dc.subject Scatterometers en
dc.subject Hyper-temporal data en
dc.title The potential of advanced scatterometer (ASCAT) 12.5 km coastal observations for offshore wind farm site selection in Irish waters en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Tiny Remmers, MaREI Centre for Marine and Renewable Energy, University College Cork, Cork, Ireland. +353-21-490-3000 Email: tiny.remmers@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder European Regional Development Fund en
dc.contributor.funder European Commission en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Energies en
dc.internal.IRISemailaddress tiny.remmers@ucc.ie en
dc.identifier.articleid 206 en
dc.relation.project info:eu-repo/grantAgreement/EC/H2020::RIA/687289/EU/Coastal Waters Research Synergy Framework/Co-ReSyF en


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© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. Except where otherwise noted, this item's license is described as © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.
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