Open AccessVertical wake deflection for offshore floating wind turbines by differential ballast control
Author(s) -
Emmanouil M. Nanos,
Stefano Letizia,
Daniel J. Barreiro Clemente,
Chengyu Wang,
Mario A. Rotea,
V. Iungo,
Carlo L. Bottasso
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1618/2/022047
Subject(s) - wake , ballast , deflection (physics) , marine engineering , offshore wind power , turbine , turbulence kinetic energy , wind power , turbulence , renewable energy , wind tunnel , environmental science , engineering , meteorology , aerospace engineering , physics , electrical engineering , optics
This paper discusses the idea of vertical wake deflection for offshore wind turbines using active ballast control. First, the concept of active ballast control for changing the attitude of an offshore wind energy semi-submersible platform is presented and briefly explored. Next, the influence of vertical wake deflection on the wake behavior and power production of a cluster of two wind turbines is studied through wind tunnel experiments and LES simulations. Results show that vertical deflection changes substantially the wake characteristics and affects the inflow at a downstream wind turbine in terms of available kinetic energy and turbulence intensity. For the most favorable case considered here, the cluster power was increased by approximately 8%.