Wind resources at Horns Rev

More documents

Recommendations

Info

energy. environment. knowledge. Page 68 of 69 9. Conclusion With meteorological data and marine data recorded for a period of 3.5 years, the meteorological aspects as well as the marine aspects of the Horns Rev site, are very well documented. In addition, the data coverage of the meteorological measurements is more than 99%; using the back-up system it would be possible to establish a data set with 100% coverage. The report describes the three individual meteorological systems - main, back-up and sonic system - in detail. The measuring programme investigated the directional sensitivity for wake effects, as well as the affect of speed-up and wake effect on mast effects. The report evaluates the main statistical values to give an overview of the wind records compiled from May 1999 to November 2002. The statistics include the distribution of wind speed, wind direction and turbulence. More than 8900 hours of 20 Hz 3D-sonic measurements are available for the site. The sonic data are stored in a common file format in the Database on Wind Characteristics. The sonic data shown and evaluated in this report are based on statistical figures. Different methods have been applied to produce long-term predictions of the wind resources. The purpose of using different methods is that each methodology has different strengths and weaknesses. The wind resources estimated in this report are compared with previous estimates, and good agreement is seen. The report also evaluates the atmospheric stability, the shear exponent distribution and the distribution of gusts. Wave action has been measured simultaneously with the meteorological aspects of the site; the coverage exceeds 80% for wave height data and 60% for current data. The report presents statistical values and distribution plots. For further analysis, numerical simulations have been performed to establish estimates of the long-term extremes of waves, current and water level. During the measuring period, the site encountered an extreme hurricane, which is also described. The hurricane hit the Horns Rev site on December 3, 1999 and exhibited extremely fierce gusts with maximum 1 Hz values of 58.5 m/s at 18.00 hours. Finally, the report discusses uncertainties related to both meteorological and marine data as well as data treatment. Report no.: D-160949 Tech-wise A/S is an international consulting Tech-wise A/S engineering company specialised Kraftværksvej 53 in energy and environment DK-7000 Fredericia
energy. environment. knowledge. Page 69 of 69 10. References [1] IEC 61400-1: Wind turbine generator system - Part 1, Safety requirements. [2] Statistics of offshore wind speed gusts, EWEC2001, Copenhagen 2001 [3] Database on Wind Characteristics, Internet database containing wind field measurements, URL=http://www.winddata.com/ [4] Offshore Wind Resources at Selected Danish Sites, J. Højstrup, B. Lange, R. J. Barthelmie, A. M. J. Pedersen, F. A. Olsen, J. Svenson. Risø June 1997. [5] Offshore Wind Resources at Danish Measurement Sites, R. J. Barthelmie, M. S. Courtney, B. Lange, M. Nielsen, A. M. Sempreviva, J. Svenson, F. Olsen, T. Christensen. Risø November 1998. [6] Produktionsestimat baseret på korrelation til Hvide Sande masten (in Danish: Production estimate based on correlation to the Hvide Sande mast), report no. 01-078 Søren Mogensen. Tech-wise 2001. [7] Korrelationsanalyse mellem Juvre og Horns Rev (in Danish: Correlation analysis between Juvre and Horns Rev), report no. 01-079 Søren Mogensen. Techwise 2001. [8] R.J. Barthelmie, M.S. Courtney, B. Lange, M. Nielsen, A.M. Sempreviva. J. Svenson. F. Olsen, T. Christensen, 1999: Offshore Wind Resources at Danish Measurement Sites. European Wind Conference, 1- 5 March 1999, Nice, France, pp. 1101-1104. [9] Pedersen, B.M., K.S. Hansen, S. Øye, M. Brinch, O. Fabian, 1992: Some experimental investigations of the influence of the mounting arrangements on the accuracy of cup-anemometer measurements. Journ. Of Wind. Eng. and Ind. Aerod., vol 39, pp. 373-383. [10] J. Højstrup, 1999: Vertical Extrapolation of Offshore Wind Profiles. European Wind Conference, 1- 5 March 1999, Nice, France, pp. 1220-1223. [11] Dansk Hydraulisk Institut November 1999: Havvindmøllefundamenter ved Horns Rev. Hydrografiske Data (in Danish: Offshore wind farm foundations at Horns Rev. Hydrographic data). Report no.: D-160949 Tech-wise A/S is an international consulting Tech-wise A/S engineering company specialised Kraftværksvej 53 in energy and environment DK-7000 Fredericia
Page 1 and 2:
REPORT Wind Resources at Horns Rev
Page 3 and 4:
energy. environment. knowledge. Pag
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18: energy. environment. knowledge. Pag
Page 67: energy. environment. knowledge. Pag
show all

Wind resources at Horns Rev

Create successful ePaper yourself

Delete template?

Save as template?