Power deficit inside wind farms-Barthelmie et al. [59], present results of modeling the behavior of WT wakes in order to improve power output predictions. The following figure shows the predicted power deficit in the Danish offshore wind farm Horns Rev.

Example: Two 2.3 MW turbines are spaced 9.4D apart directly in line with the wind. What is the total power produced?

Front turbine, normalized power is 1.0, power \(=>1.0 * 2.3 \mathrm{MW}=2.3 \mathrm{MW}\)

Second turbine is "waked," normalized power is 0.7, waked power \(=>0.7^{*} 2.3 \mathrm{MW}=1.61\) MW

\[ \text { Total power }=2.3+1.61 \mathrm{MW}=3.91 \mathrm{MW} \]

(a) What is the power of three turbines, \(9.4 \mathrm{D}\) apart, directly in line with the wind?

(b) What is the power of three turbines, \(9.4 \mathrm{D}\) apart, perpendicular with the wind?

Transcribed Image Text:

Normalized power 0.9 0.8 0.7 0.6 0.5 1 1 Power deficit in horns rev wind farm, 8 m/s, 2 degree sector Spacing=7D Spacing 9.4 D Spacing= 10.5 D 0.4 0 1 2 3 4 Turbine number 5 6 7 8