Next Article in Journal
Electro-Thermal Modeling of Metal-Oxide Arrester under Power Frequency Applied Voltages
Previous Article in Journal
A Fully Coupled Numerical Model for Microwave Heating Enhanced Shale Gas Recovery
Open AccessArticle

Wind Farm Blockage and the Consequences of Neglecting Its Impact on Energy Production

1
DNV GL, Group Technology & Research, Power & Renewables, Bristol BS2 0PS, UK
2
DNV GL, Energy, Project Development, Melbourne 3008, Australia
3
DNV GL, Energy, Project Development, Glasgow G1 2PR, UK
*
Author to whom correspondence should be addressed.
Energies 2018, 11(6), 1609; https://doi.org/10.3390/en11061609
Received: 22 March 2018 / Revised: 14 June 2018 / Accepted: 15 June 2018 / Published: 20 June 2018
Measurements taken before and after the commissioning of three wind farms reveal that the wind speeds just upstream of each wind farm decrease relative to locations farther away after the turbines are turned on. At a distance of two rotor diameters upstream, the average derived relative slowdown is 3.4%; at seven to ten rotor diameters upstream, the average slowdown is 1.9%. Reynolds-Averaged Navier-Stokes (RANS) simulations point to wind-farm-scale blockage as the primary cause of these slowdowns. Blockage effects also cause front row turbines to produce less energy than they each would operating in isolation. Wind energy prediction procedures in use today ignore this effect, resulting in an overprediction bias that pervades the entire wind farm. View Full-Text
Keywords: blockage effects; array efficiency; wind resource assessment; turbine interaction; wake effects; induction blockage effects; array efficiency; wind resource assessment; turbine interaction; wake effects; induction
Show Figures

Graphical abstract

MDPI and ACS Style

Bleeg, J.; Purcell, M.; Ruisi, R.; Traiger, E. Wind Farm Blockage and the Consequences of Neglecting Its Impact on Energy Production. Energies 2018, 11, 1609.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop