Analysis of prediction methods for environmental conditions at the Hywind site - Analyse av beregningsmetoder for miljø på Hywind-lokasjonen
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The increasing amount of offshore installations and maintenance are rising the importance of reliable weather forecast. To carry out an offshore operation it is necessary that the waves are not too high nor the wind and currents too strong. By providing good weather forecast, such conditions are avoided. If the forecast predicts worse weather, an offshore operation might be canceled unnecessarily, causing expensive losses. In the process of building and testing the floating wind turbine, Hywind Demo, weatherforecast models with higher resolutions than regularly was established. In addition, wind, waves and currents are well documented for the Hywind Demo site by a Seawatch buoy. By use of these data, an assessment of the quality of the weather forecast has been performed. The comparison of the weather forecast one day ahead with the measured data, gavefollowing results. The correlation for currents are low. For wind and waves, the correlation are relatively good. Statistically, does one year of weather forecast give a reasonable estimate of what to expect at the site. Exceptions are that stronger surface currents will most likely occur and lower waves are to be expected.