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Offshore wind resources at Danish measurement sites

Abstract

In order to characterise wind and turbulence characteristics at prospective offshore wind energy sites, meteorological observations from a number of purpose-built offshore monitoring sites have been analyzed and compared with long wind speed time series. New analyses have been conducted on the data sets focussing on meteorology, turbulence, extreme winds and wind and wave interactions. Relationships between wind speed, turbulence and fetch are highly complex. Minimum turbulence intensity offshore is associated with wind speeds of about 12 m/s. At lower wind speeds, stability effects are important while at higher winds speeds wind and wave interactions appear to dominate. On average, turbulence intensity offshore at 48 m height is approximately 0.08 if no coastal effects are present. However, the effect of the coastal discontinuity persists in wind speed and turbulence characteristics for considerable distances offshore. The majority of the adjustment of appears to occur within 20 km of the coast. (au)
Authors:
Barthelmie, R J; Courtney, M S; Lange, B; Nielsen, M; Sempreviva, A M; [1]  Svenson, J; Olsen, F; [2]  Christensen, T [3] 
  1. Risoe National Lab., Dept. of Wind Energy and Atmospheric Physics, Roskilde (Denmark)
  2. SEAS, Haslev (Denmark)
  3. Elsamprojekt, Fredericia (Denmark)
Publication Date:
Mar 01, 1999
Product Type:
Conference
Report Number:
RISO-R-1114(EN); CONF-990314-
Reference Number:
SCA: 170100; PA: DK-99:001400; EDB-99:087280; SN: 99002098306
Resource Relation:
Conference: EWEC`99. European wind energy conference, Nice (France), 1-5 Mar 1999; Other Information: PBD: Mar 1999; Related Information: Is Part Of Contributions from the Department of Wind Energy and Atmospheric Physics to EWEC `99 in Nice, France; Larsen, Gunnar C.; Westermann, Kirsten; Noergaard, Per [eds.]; PB: 256 p.
Subject:
17 WIND ENERGY; DENMARK; OFFSHORE SITES; WIND; RESOURCE ASSESSMENT; TURBULENCE; SITE CHARACTERIZATION; WIND TURBINE ARRAYS
OSTI ID:
679618
Research Organizations:
Risoe National Lab., Roskilde (Denmark). Wind Energy and Atmospheric Physics Dept.
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE99747779; CNN: Contract ENS-51171-96.0040; Contract JOR3-CT95-0089; ISBN 87-550-2542-0; TRN: DK9901400
Availability:
OSTI as DE99747779
Submitting Site:
DK
Size:
pp. 105-108
Announcement Date:

Citation Formats

Barthelmie, R J, Courtney, M S, Lange, B, Nielsen, M, Sempreviva, A M, Svenson, J, Olsen, F, and Christensen, T. Offshore wind resources at Danish measurement sites. Denmark: N. p., 1999. Web.
Barthelmie, R J, Courtney, M S, Lange, B, Nielsen, M, Sempreviva, A M, Svenson, J, Olsen, F, & Christensen, T. Offshore wind resources at Danish measurement sites. Denmark.
Barthelmie, R J, Courtney, M S, Lange, B, Nielsen, M, Sempreviva, A M, Svenson, J, Olsen, F, and Christensen, T. 1999. "Offshore wind resources at Danish measurement sites." Denmark.
@misc{etde_679618,
title = {Offshore wind resources at Danish measurement sites}
author = {Barthelmie, R J, Courtney, M S, Lange, B, Nielsen, M, Sempreviva, A M, Svenson, J, Olsen, F, and Christensen, T}
abstractNote = {In order to characterise wind and turbulence characteristics at prospective offshore wind energy sites, meteorological observations from a number of purpose-built offshore monitoring sites have been analyzed and compared with long wind speed time series. New analyses have been conducted on the data sets focussing on meteorology, turbulence, extreme winds and wind and wave interactions. Relationships between wind speed, turbulence and fetch are highly complex. Minimum turbulence intensity offshore is associated with wind speeds of about 12 m/s. At lower wind speeds, stability effects are important while at higher winds speeds wind and wave interactions appear to dominate. On average, turbulence intensity offshore at 48 m height is approximately 0.08 if no coastal effects are present. However, the effect of the coastal discontinuity persists in wind speed and turbulence characteristics for considerable distances offshore. The majority of the adjustment of appears to occur within 20 km of the coast. (au)}
place = {Denmark}
year = {1999}
month = {Mar}
}