A method of increasing the performance of wind farms has been established by limiting the lateral separation between neighbouring wind turbines. The close proximity of the wind turbines creates an in-field blockage effect that results in a core of increased speed that is accelerated through the gap between the turbines. The study has indicated that the performance of three wind turbines can be increased by over 10% with tip-to-tip separation of 0.5 diameters (D) compared to the power output of the respective turbines in isolation. A flow-mapping study has been completed using a single-normal hot-wire anemometer to characterise the increased flow speed through a narrow lateral gap, leading to the observation of a region of increased speed that occurs between 0D and 2.5D downstream of the gap between laterally-spaced wind turbines.

Additional Metadata
Keywords Blockage effect, HAWT, Wakes, Wind energy, Wind turbine
Conference 12th Americas Conference on Wind Engineering 2013: Wind Effects on Structures, Communities, and Energy Generation, ACWE 2013
Citation
McTavish, S. (Sean), Feszty, D, & Nitzsche, F. (2013). An investigation of field blockage effects in closely-spaced lateral wind farm configurations. Presented at the 12th Americas Conference on Wind Engineering 2013: Wind Effects on Structures, Communities, and Energy Generation, ACWE 2013.