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Energies 2014, 7(11), 7483-7498; doi:10.3390/en7117483

CFD Study on Aerodynamic Power Output Changes with Inter-Turbine Spacing Variation for a 6 MW Offshore Wind Farm

1
School of Mechanical Engineering, Pusan National University, San 30, Jangjeon-dong, Geumjeong-Gu, Busan 609-735, Korea
2
DNDE Inc., Busan 612-020, Korea
*
Author to whom correspondence should be addressed.
Received: 1 July 2014 / Revised: 10 November 2014 / Accepted: 11 November 2014 / Published: 18 November 2014
(This article belongs to the Special Issue Wind Turbines 2014)
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Abstract

This study examined the aerodynamic power output change of wind turbines with inter-turbine spacing variation for a 6 MW wind farm composed of three sets of 2 MW wind turbines using computational fluid dynamics (CFD). The wind farm layout design is becoming increasingly important as the use of wind energy is steadily increasing. Among the many wind farm layout design parameters, the inter-turbine spacing is a key factor in the initial investment cost, annual energy production and maintenance cost. The inter-turbine spacing should be determined to maximize the annual energy production and minimize the wake effect, turbulence effect and fatigue load during the service lifetime of wind turbines. Therefore, some compromise between the aerodynamic power output of wind turbines and the inter-turbine spacing is needed. An actuator disc model with the addition of a momentum source was not used, and instead, a full 3-dimensional model with a tower and nacelle was used for CFD analysis because of its great technical significance. The CFD analysis results, such as the aerodynamic power output, axial direction wind speed change, pressure drop across the rotor of wind turbine, and wind speed deficit due to the wake effect with inter-turbine spacing variation, were studied. The results of this study can be applied effectively to wind farm layout design and evaluation. View Full-Text
Keywords: aerodynamic power output; CFD (computational fluid dynamics); inter-turbine spacing; layout; offshore wind farm aerodynamic power output; CFD (computational fluid dynamics); inter-turbine spacing; layout; offshore wind farm
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Choi, N.J.; Nam, S.H.; Jeong, J.H.; Kim, K.C. CFD Study on Aerodynamic Power Output Changes with Inter-Turbine Spacing Variation for a 6 MW Offshore Wind Farm. Energies 2014, 7, 7483-7498.

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