The existing wind measurements with masts only cover a small part of the height range of the rotors of the planned wind turbines. The course of the wind speed above the masts is therefore unknown. This results in a significant uncertainty of the energy prediction and a difference between the results of different experts.
Solution: Wind measurement with Sodar over several months
Results:
The wind shear across the entire heigt range of the rotor is very homogenous.
The main cause for the difference in the results between the existing wind resource assessments could be resolved.
The total uncertainty of the energy prediction for the entire project was reduced by about 1 %.
The data availability of the Sodar instrument at the site was very good.
The results of the verification of the Sodar instrument performed in North Germany are valid for the Moroccan site.
The parabolic sound reflectors should be cleaned from sand about every two months.
Operation of the instrument by local personnel was possible without problems.
In 2019, a wind measurement with a Sodar was completed successfully in the high mountains of Bosnia under winterly conditions. In 2019, a wind measurement with a Sodar was completed successfully in the high mountains of Bosnia under winterly conditions. In 2019, a wind measurement with a Sodar was completed successfully in the high mountains
aj completes successfully a wind measurement with Sodar to assess the wind shear on a site in Marocco. aj completes successfully a wind measurement with Sodar to assess the wind shear on a site in Marocco.
Oldershausen, 15 May 2018: A new study of aj shows that the wind resource of the years around 1990 cannot be considered as very exceptional any more. Consequently, these years must be included in the long term reference period, if the result should be balanced. Download of the report Wind D NAO-Index E 15.05.2018 aj