IEC Acoustic Standard IEC 61400-11
IEC Acoustic Standard IEC 61400-11
IEC Acoustic Standard IEC 61400-11
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8 Data Reduction Procedures<br />
Wind speed<br />
Wind speeds measured at height z shall be corrected to a<br />
wind speed at reference conditions by assuming wind<br />
profiles<br />
NATIONAL RENEWABLE ENERGY LABORATORY<br />
z Oref reference roughness length, 0.05m<br />
z O roughness length<br />
H rotor centre height<br />
z ref reference height, 10m<br />
z anemometer height<br />
Roughness length z O can be calculated or estimated using Table 1<br />
in the standard<br />
19
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