2. Fachtagung Energiemeteorologie 2011, Bremerhaven SITE ASSESSMENT. WIND TURBINE ASSESSMENT. GRID INTEGRATION. DUE DILIGENCE. KNOWLEDGE.
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1 Turbulence intensity in the German Bight: Comparison of the turbulence conditions at FINO1 and FINO3 A. Westerhellweg, B. Canadillas, T. Neumann, DEWI GmbH SITE ASSESSMENT. WIND TURBINE ASSESSMENT. GRID INTEGRATION. DUE DILIGENCE. KNOWLEDGE. CONSULTANCY 2. Fachtagung Energiemeteorologie 2011, Bremerhaven
2 Page 1 Offshore Platform FINO 1 From today
3 FINO1: today Wind measurement up to 100m ü. LAT Complete set of MetOcean data 130 m Structure dynamical data About 400 data users world wide FINO: Research Platforms in North and Baltic Sea Project: Germanischer Lloyd Windenergie GmbH Financed by: Federal Ministry of Environment (BMU)
4 Meteorological Measurements (DEWI) Seite 3 Wind Vanes Ultra Sonic Anemometer Cup-Anemometer
5 Meteorological Measurements (DEWI) Seite 4 Wind Vanes Ultra Sonic Anemometer Temperature Cup-Anemometer Humidity Bar. pressure Global irradiation Rain
6 Photo: Jan Oelker Page 5 Maintenance
7 FINO1: today Page 6 100% 90% 80% 70% List of Sensors Cup-Anemometer:100m, 90m, 80m, 70m, 60m, 50m, 40m, 33m Wind Vanes:90m, 70m, 50m, 33m Percentage e 60% 50% 40% Cup-Anemomete er Wind vane Temperature Humidity Rain Radiation Baro. Pressure e Temperatures:100m, 70m, 50m, 40m, 33m Humidity: 100m, 50m,33m 30% Rain: 90m, 20m 20% Irradiation:95m, 33m 10% 0% Baro. Press.: 90m, 20m
8 FINO1: today m - monthly mean windspeed at Fino1 for the period from 01. Jan 2004 to 31. Aug 2008 Wind speed at 100m height m - monthly mean windspeed 100 m - moving average m/s wind speed [m/s] Sep 09 Jun 09 Mrz 09 Dez 08 Sep 08 Jun 08 Mrz 08 Dez 07 Sep 07 Jun 07 Mrz 07 Dez 06 Sep 06 Jun 06 Mrz 06 Dez 05 Sep 05 Jun 05 Mrz 05 Dez 04 Sep 04 Jul 04 Apr 04 Jan 04 Okt 03
9 Cleaning from under water vegetation Page 8
10 FINO1: today Page 9 Significant wave heights As function of wind speed, direction and atmospheric stability
11 Page 10 Offshore Platform FINO 1 Future Tasks..
12 Long term development of the wind speed at 103,5 m 100 m - monthly mean windspeed at Fino1 for the period from 01. Jan 2004 to 31. Aug m - monthly mean windspeed 100 m - moving average wind speed [m/s] Sep 09 Jun 09 Mrz 09 Dez 08 Sep 08 Jun 08 Mrz 08 Dez 07 Sep 07 Jun 07 Mrz 07 Dez 06 Sep 06 Jun 06 Mrz 06 Dez 05 Sep 05 Jun 05 Mrz 05 Dez 04 Sep 04 Jul 04 Apr 04 Jan 04 Okt 03
13 FINO1 nearby alpha ventus Page 12
14 FINO1 nearby alpha ventus Page 13
15 FINO1 nearby alpha ventus Page 14
16 Planned Offshore-Wind farms in the North Sea Seite 15 Quelle: BSH - Stand:
17 Turbulence intensity in the wake of wind farm Alpha Ventus Page 16 Period Jun10-Jan11 Filter: Windturbines in operation Turbulence intensity for free wind speed of 8m/s +/- 2m/s (Nacell anemometer AV12) CFD calculations of the wake effects
18 Page 17
19 Turbulence intensity in the wake of wind farm Alpha Ventus Page 18
20 Turbulence intensity in the wake of wind farm Alpha Ventus Page 19 Turbulence increase for different atmospheric stability cases: Unstable: T 30m < T -3m -1 C, Stable: T 30m > T -3m +1 C and Neutral: T -3m -1 C < T 30m < T -3m +1 C. Unstable: Neutral: Stable:
21 Page 20 Offshore Platform FINO 1 + FINO2 + FINO 3 Turbulence Intensity Study
22 FINO1 Turbulence study in the OWID project Page 21
23 FINO1 Turbulence study in the OWID project Page 22
24 Turbulence Intensity at different sites Page 23 Fino1: 5 years, (before Alpha Ventus), 90m, mast correction of wind speed and standard deviation Fino3: 1 year, , 90m, combined from 3 anemometers, 70m: 8% data losses, 90m 27% data losses Fino2: 3 years, , 102m, top anemometer
25 Turbulence Intensity at different sites Page 24 Fino1
26 Turbulence Intensity at different sites Page 25 Fino3
27 Turbulence Intensity at different sites Page 26 Fino2
28 Turbulence Intensity at different sites Page 27
29 Turbulence Intensity at different sites Page 28 Comparison Fino 1 and Fino3 during long-term: Data base: 5 years Data base: 1year Average values depend on the wind distribution of regarded period!
30 Turbulence Intensity at different sites Comparison Fino 1 and Fino3 during common period 90m Page 29
31 Conclusions Page 30 Long term data series from FINO1,2,3 available (2004->) FINO1 already strongly influenced by alpha ventus Significant differences in turbulence intensity between FINO 1,2,3 visible (fetch) FINO1 and 3 show different wind speed and direction Combined Evaluation of FINO1,2,3 brings further insight into the offshore boundary layer
10 years of meteorological measurements at FINO1
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