Wind resources at Horns Rev

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Exceedance Probability
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Figure 6.14 Probability of exceedence for measured significant wave heights at
positions south, May 1999 to November 2002
A key point in selecting the right operation and maintenance (O&M) strategy for an
offshore wind farm, is the accessibility of the wind turbines. The most natural choice of
transport for offshore operations is by boat. However, with a limiting wave height of
Hs=1.2-1.3 m for boat operations, it can be seen from Figure 6.17 that the accessibility
is only approx. 60%.
6.2.3 Currents
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Significant wave height [m]
The Horns Rev site is dominated by a N-S flowing tidal current with maximum
velocities of about 1 m/s. In extreme storm conditions with winds from the west, the
wind induced current in the eastward direction has been measured to nearly 0.8 m/s (the
December 3, 1999 hurricane).
Report no.: D-160949
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in energy and environment DK-7000 Fredericia