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Wind resource modelling for micro-siting - Validation at a 60-MW wind farm site

Abstract

This paper investigates and validates the applicability of the WAsP-model for layout optimization and micro-siting of wind turbines at a given site for a 60-MW wind farm at Zafarana at the Gulf of Suez in Egypt. Previous investigations show large gradients in the wind climate within the area. For the design and optimization of the wind farm it was found necessary to verify the WAsP extrapolation of wind atlas results from 2 existing meteorological masts located 5 and 10 km, respectively, from the wind farm site. On-site measurements at the 3.5 x 3.5 km{sup 2} wind farm site in combination with 7 years of near-site wind atlas measurements offer significant amounts of data for verification of wind conditions for micro-siting. Wind speeds, wind directions, turbulence intensities and guests in 47.5 m a.g.l. have been measured at 9 locations across the site. Additionally, one of the site masts is equipped as a reference mast, measuring both vertical profiles of wind speed and temperature as well as air pressure and temperature. The exercise is further facilitated by the fact that winds are highly uni-directional; the north direction accounting for 80-90% of the wind resource. The paper presents comparisons of 5 months of  More>>
Authors:
Hansen, J C; Gylling Mortensen, N; [1]  Said, U S [2] 
  1. Risoe National Lab., Wind Energy and Atmospheric Physics Dept., Roskilde (Denmark)
  2. New and Renewable Energy Authority, Cairo (Egypt)
Publication Date:
Mar 01, 1999
Product Type:
Conference
Report Number:
RISO-R-1114(EN); CONF-990314-
Reference Number:
SCA: 170100; PA: DK-99:001419; EDB-99:087285; SN: 99002098325
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; WIND POWER; RESOURCE ASSESSMENT; SITE CHARACTERIZATION; W CODES; WIND TURBINE ARRAYS; CLIMATE MODELS; VERIFICATION; WIND; EGYPTIAN ARAB REPUBLIC
OSTI ID:
679637
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; ISBN 87-550-2542-0; TRN: DK9901419
Availability:
OSTI as DE99747779
Submitting Site:
DK
Size:
pp. 183-186
Announcement Date:

Citation Formats

Hansen, J C, Gylling Mortensen, N, and Said, U S. Wind resource modelling for micro-siting - Validation at a 60-MW wind farm site. Denmark: N. p., 1999. Web.
Hansen, J C, Gylling Mortensen, N, & Said, U S. Wind resource modelling for micro-siting - Validation at a 60-MW wind farm site. Denmark.
Hansen, J C, Gylling Mortensen, N, and Said, U S. 1999. "Wind resource modelling for micro-siting - Validation at a 60-MW wind farm site." Denmark.
@misc{etde_679637,
title = {Wind resource modelling for micro-siting - Validation at a 60-MW wind farm site}
author = {Hansen, J C, Gylling Mortensen, N, and Said, U S}
abstractNote = {This paper investigates and validates the applicability of the WAsP-model for layout optimization and micro-siting of wind turbines at a given site for a 60-MW wind farm at Zafarana at the Gulf of Suez in Egypt. Previous investigations show large gradients in the wind climate within the area. For the design and optimization of the wind farm it was found necessary to verify the WAsP extrapolation of wind atlas results from 2 existing meteorological masts located 5 and 10 km, respectively, from the wind farm site. On-site measurements at the 3.5 x 3.5 km{sup 2} wind farm site in combination with 7 years of near-site wind atlas measurements offer significant amounts of data for verification of wind conditions for micro-siting. Wind speeds, wind directions, turbulence intensities and guests in 47.5 m a.g.l. have been measured at 9 locations across the site. Additionally, one of the site masts is equipped as a reference mast, measuring both vertical profiles of wind speed and temperature as well as air pressure and temperature. The exercise is further facilitated by the fact that winds are highly uni-directional; the north direction accounting for 80-90% of the wind resource. The paper presents comparisons of 5 months of on-site measurements and modeled predictions from 2 existing meteorological masts located at distances of 5 and 10 km, respectively, from the wind farm site. Predictions based on terrain descriptions of the Wind Atlas for the Gulf of Suez 1991-95 showed over-predictions of wind speeds of 4-10%. With calibrated terrain descriptions, made based on measured data and a re-visit to critical parts of the terrain, the average prediction error of wind speeds was reduced to about 1%. These deviations are smaller than generally expected for such wind resource modeling, clearly documenting the validity of using WAsP modeling for micro-siting and layout optimization of the wind farm. (au)}
place = {Denmark}
year = {1999}
month = {Mar}
}