Wind resources at Horns Rev
Wind resources at Horns Rev
Wind resources at Horns Rev
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energy. environment. knowledge. Page 30 of 69<br />
Level above DNN [m]<br />
(Lognormal scale)<br />
100<br />
10<br />
Figure 2.16 Semi-logarithmic plot of observed wind speeds by height. <strong>Wind</strong> speeds are<br />
averaged for all sectors. May 1999 to November 2002<br />
[8] discusses different factors th<strong>at</strong> will lead to distortion of the profile away from<br />
logarithmic predictions, and it is worth noting th<strong>at</strong> [8] has found the same tendency for<br />
other offshore sites in Denmark. At the moment, no further analyses have been initi<strong>at</strong>ed<br />
to clarify this subject here.<br />
3. 3-D measurements<br />
3.1 Sonic measurement system - basic st<strong>at</strong>istics<br />
All the 3-D sonic time series are measured 50 m above sea level, and are stored in a<br />
common file form<strong>at</strong> in the D<strong>at</strong>abase of <strong>Wind</strong> Characteristics 1 [3] where Table 3.1<br />
summarises the annual recordings. The d<strong>at</strong>a quality of the sonic measurements has been<br />
improved during the measurement period, and time series recorded after September<br />
2001 include a sonic temper<strong>at</strong>ure and a limited number of spikes (approx. 4000 hours).<br />
This section contains a number of plots based on st<strong>at</strong>istical values extracted from [3].<br />
1 D<strong>at</strong>abase on <strong>Wind</strong> Characteristics (http://www.windd<strong>at</strong>a.com/)<br />
Measured<br />
7.0 7.5 8.0 8.5 9.0 9.5 10.0<br />
<strong>Wind</strong> Speed [m/s]<br />
Report no.: D-160949<br />
Tech-wise A/S is an intern<strong>at</strong>ional consulting Tech-wise A/S<br />
engineering company specialised Kraftværksvej 53<br />
in energy and environment DK-7000 Fredericia
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