Improved energy production of multi-rotor wind farms

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  • Paul van der Laan, Danmarks Tekniske Universitet
  • ,
  • Mahdi Abkar

The multi-rotor (MR) wind turbine concept can be used to upscale wind turbines without increasing the rotor diameter, which can be beneficial for transport, manufacture and design of wind turbines blades. The rotor interaction of a MR wind turbine leads to a faster wake recovery compared to an equivalent single-rotor (SR) wind turbine wake. In this article, the benefit of the faster wake recovery of MR wind turbines is quantified using Reynolds-averaged Navier-Stokes simulations of a 4}4 rectangular MR wind farm, for three different inter wind turbine spacings. The simulations predict an increase of 0.3-1.7% in annual energy production for the MR wind farm with respect to an equivalent SR wind farm, where the highest gain is obtained for the tightest inter wind turbine spacing. The gain in AEP is mainly caused by the aligned wind directions for the first downstream wind turbine in a wind turbine row of the MR wind farm, which is verified by an additional large-eddy simulation.

OriginalsprogEngelsk
Artikelnummer012011
BogserieJournal of Physics: Conference Series (Online)
Vol/bind1256
Nummer1
Antal sider11
ISSN1742-6596
DOI
StatusUdgivet - 22 jul. 2019
BegivenhedWake Conference 2019 - Uppsala University's Gotland campus, Visby, Sverige
Varighed: 22 maj 201924 maj 2019

Konference

KonferenceWake Conference 2019
Lokation Uppsala University's Gotland campus
LandSverige
ByVisby
Periode22/05/201924/05/2019

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