University of Perugia Department of Industrial Engineering Francesco Castellani Advanced pre and post-processing in Windsim
CONTENTS Pre-processing 1) Domain control: *.gws construction 2) Advanced grid control: *.bws construction. Post-processing 3) Layout implementation: *.ows construction 4) Power curve adjustment 5) Wind shear map 6) AEP map 7) Time history transfer procedure and the power time history calculation
1/7 Domain control: *.gws construction Terrain data *.ascii file RGB roughness data from Corine Land Cover
1/7 Domain control: *.gws construction Terrain data *.ascii file RGB roughness data from Corine Land Cover Domain rotation Roughness matrix generation Domain rotation procedure Writing the *.gws file
1/7 Domain control: *.gws construction DOMAIN ROTATION PROCEDURE
1/7 Domain control: *.gws construction DOMAIN ROTATION PROCEDURE
1/7 Domain control: *.gws construction RUNNING WINDSIM WITH ORTHOGONAL SECTORS
1/7 Domain control: *.gws construction
2/7 Advanced grid control: *.bws construction. Grid refinement for obstacles or turbines definition
2/7 Advanced grid control: *.bws construction.
2/7 Advanced grid control: *.bws construction.
2/7 Advanced grid control: *.bws construction. FUTURE WORK 1.Assign to each rotor cells the right drag force coefficient 2.Using domain rotation to align the turbine axis to the wind direction in non-orthogonal sectors
3/7 Layout implementation: *.ows construction Autocad list text Ascii file X,Y file Power curve and hub height Writing *.ows Importing objects
4/7 Power curve adjustment Calculation using the Windsim energy module
4/7 Power curve adjustment Calculation using the Windsim energy module
4/7 Power curve adjustment 2500 2000 1500 1000 500 0-500 0 5 10 15 20 25 30
4/7 Power curve adjustment Calculation using the adjusted power curve
5/7 Wind shear map Using two wind map calculated for two different levels is possible to estimate the resulting value of for each point of the domain
5/7 Wind shear map Average wind shear map
5/7 Wind shear map 0 180 Directional wind shear map
*.rsf file 6/7 AEP map Height a.s.l. Air density Weibull parameters PDF POWER CURVE GROSS A.E.P.
6/7 AEP map
directional shift speedup 7/7 Time history transfer procedure and the power time history calculation Wind profile data (energy module) 1 0.95 0.9 0.85 0.8 Speedup and directional shift calculation 0.75 0.7 0.65 15 0 50 100 150 200 250 300 350 direction 10 Transferring time history data 5 0-5 -10-15 0 50 100 150 200 250 300 350 direction Results are consistent with the new windsim th transfer procedure
TI ratio 7/7 Time history transfer procedure and the power time history calculation 2.8 2.6 2.4 2.2 2 1.8 1.6 1.4 0 50 100 150 200 250 300 350 direction FUTURE WORK Transferring turbulence intensity data
P (kw) 7/7 Time history transfer procedure and the power time history calculation 2000 1800 1600 1400 1200 1000 800 600 400 200 0 0 20 40 60 80 100 120 140 160 180 200 It is possible to transfer the time history in each turbine s position in order to calculate the power history
7/7 Time history transfer procedure and the power time history calculation Average production data are different from the estimation of the energy module: this is due to the speedup interpolations. Higher differences were discovered in very complex terrain sites.
7/7 Time history transfer procedure and the power time history calculation Estimating the Weibull parameter for each turbine and calculating the reference wind speed. A k Vref (m/s) turbine 1 6.678731 1.92633 32.65012 turbine 2 7.742141 1.81049 33.54634
CONCLUSIONS Many things can still be done using automatic procedures before and after the wind field run An advanced grid control can be very useful for turbines and obstacles local simulations The AEP map can be useful for an automatic optimization procedure of the layout Transferred climatologies should be used in the turbine s location for production estimation
Thank you very much for your attention Looking forward to meet you for the next Windsim Usermeeting