Embed Size (px)
DESCRIPTION
WIND TUNNEL SIMULATION OF WAKE EFFECTS ON WIND TURBINE PERFORMANCE. M. S. Adaramola and P-Å Krogstad Department of Energy and Process Engineering, The Norwegian University of Science and Technology, N-7491 Trondheim, Norway. OUTLINES. Introduction Objectives Experimental set-up Results - PowerPoint PPT Presentation
Citation preview
M. S. Adaramola and P-Å KrogstadM. S. Adaramola and P-Å KrogstadDepartment of Energy and Process Engineering,
The Norwegian University of Science and Technology, N-7491 Trondheim, Norway
IntroductionObjectivesExperimental set-upResultsConclusions
Turbine wake
Turbine wakeWind conditions
Turbine wakeWind conditions
Performance characteristics
Turbine wakeWind conditions
Performance characteristics
Site topology/surface roughness
Turbine wakeWind conditions
Performance characteristics
Site topology/surface roughness
Downstream turbine performance depends on these parameters as well as distance from the upstream turbine.
1.Effect of distance of separation between the turbines, S/D.
1.Effect of distance of separation between the turbines, S/D.
2.Effect of power extracted from the upstream
turbine, i.e. function of tip speed ratio,
1.Effect of distance of separation between the turbines, S/D.
2.Effect of power extracted from the upstream
turbine, i.e. function of tip speed ratio,
3.Effect of downstream turbine pitch angle, β.
Wind tunnel Dimensions:
•Height – 1.9 m•Width – 2.7 m•Length – 12 m
Blockage ratio: 12.4%
Wind velocity: 11.5 m/s
Gap between turbines:
S/D = 3, 6, 9
Downstream turbine:
β = -2o, 0o, 2o
Upstream turbine operating conditions:
• Optimum • Low, optimum and high
Model turbine layout
Effect of S/D on CP curve for downstream turbine
Relative max. Cp when downstream turbine blade pitch setting is β = 2o
Effect of downstream turbine blade pitch setting (β ) for S/D = 3
Cp as function of upstream turbine
Relative max. Cp as function of upstream turbine Downstream turbine at S/D = 3
1. The turbines should be operated at different blade
pitch angles.
1. The turbines should be operated at different blade
pitch angles.
2. Operating the upstream turbine slightly outside its
optimum will increase the performance of the
turbines further downstream.
1. The turbines should be operated at different blade
pitch angles.
2. Operating the upstream turbine slightly outside its
optimum will increase the performance of the
turbines further downstream.
3. Increase in the downstream turbine power production
may improve the overall wind farm performance.
THANK YOU
