
195Wind Energy
© 2008 Taylor & Francis Group, LLC
234
Power decit in horns rev wind farm, 8 m/s, 2 degree sector
5678
1
1
0.9
0.8
0.7
0.6
0.5
0.4
0
Spacing=7 D
Spacing=9.4 D
Spacing=10.5 D
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 MW = 2.3 MW
Second turbine is “waked,” normalized power is 0.7, waked power = >0.7*2.3 MW = 1.61
MW
Total power23161 MW391 MW=+ =.. .
(a) What is the power of three turbines, 9.4D apart, directly in line with the wind?
(b) What is the power of three turbines