Modelling and measuring flow and wind turbine wakes in large wind farms offshore

Barthelmie, RJ; Hansen, K; Frandsen, ST; Rathmann, O; Schepers, JG; Schlez, W; Phillips, J; Rados, K; Zervos, A; Politis, ES; Chaviaropoulos, PK

dc.contributor.author	Barthelmie, RJ	en
dc.contributor.author	Hansen, K	en
dc.contributor.author	Frandsen, ST	en
dc.contributor.author	Rathmann, O	en
dc.contributor.author	Schepers, JG	en
dc.contributor.author	Schlez, W	en
dc.contributor.author	Phillips, J	en
dc.contributor.author	Rados, K	en
dc.contributor.author	Zervos, A	en
dc.contributor.author	Politis, ES	en
dc.contributor.author	Chaviaropoulos, PK	en
dc.date.accessioned	2014-03-01T01:31:14Z
dc.date.available	2014-03-01T01:31:14Z
dc.date.issued	2009	en
dc.identifier.issn	1095-4244	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19754
dc.subject	Measurements	en
dc.subject	Modelling	en
dc.subject	Offshore	en
dc.subject	Wakes	en
dc.subject	Wind turbine	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Average power	en
dc.subject.other	CFD models	en
dc.subject.other	Flow modelling	en
dc.subject.other	Modelling	en
dc.subject.other	Offshore	en
dc.subject.other	Offshore wind farms	en
dc.subject.other	Power-losses	en
dc.subject.other	Reduced cost	en
dc.subject.other	State of the art	en
dc.subject.other	Total power	en
dc.subject.other	Wind energy	en
dc.subject.other	Wind farm	en
dc.subject.other	Wind turbine wakes	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Electric utilities	en
dc.subject.other	Engines	en
dc.subject.other	Farms	en
dc.subject.other	Offshore power plants	en
dc.subject.other	Wakes	en
dc.subject.other	Wind turbines	en
dc.subject.other	Wind power	en
dc.subject.other	computational fluid dynamics	en
dc.subject.other	cost	en
dc.subject.other	energy market	en
dc.subject.other	flow measurement	en
dc.subject.other	measurement method	en
dc.subject.other	wake	en
dc.subject.other	wind farm	en
dc.subject.other	wind turbine	en
dc.title	Modelling and measuring flow and wind turbine wakes in large wind farms offshore	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/we.348	en
heal.identifier.secondary	http://dx.doi.org/10.1002/we.348	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Average power losses due to wind turbine wakes are of the order of 10 to 20% of total power output in large offshore wind farms. Accurately quantifying power losses due to wakes is, therefore, an important part of overall wind farm economics. The focus of this research is to compare different types of models from computational fluid dynamics (CFD) to wind form models in terms of how accurately they represent wake losses when compared with measurements from offshore wind forms. The ultimate objective is to improve modelling of flow for large wind forms in order to optimize wind form layouts to reduce power losses due to wakes and loads. The research presented is part of the EC-funded UpWind project, which aims to radically improve wind turbine and wind farm models in order to continue to improve the costs of wind energy. Reducing wake losses, or even reduce uncertainties in predicting power losses from wakes, contributes to the overall goal of reduced costs. Here, we assess the state of the art in wake and flow modelling for offshore wind forms, the focus so for has been cases at the Horns Rev wind form, which indicate that wind form models require modification to reduce under-prediction of wake losses while CFD models typically over-predict wake losses. Further investigation is underway to determine the causes of these discrepancies. Copyright (C) 2009 John Wiley & Sons, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	Wind Energy	en
dc.identifier.doi	10.1002/we.348	en
dc.identifier.isi	ISI:000268518400002	en
dc.identifier.volume	12	en
dc.identifier.issue	5	en
dc.identifier.spage	431	en
dc.identifier.epage	444	en