Turbulence influence on optimum tip speed ratio for a 200 kW vertical axis wind turbine

The Science of Making Torque from Wind

Möllerström, E.^1,2 ; Eriksson, S.^2 ; Goude, A.^2 ; Ottermo, F.^1 ; Hylander, J.^1

Department of Construction and Energy Engineering, Halmstad University, PO Box 823, Halmstad

SE-301 18, Sweden^1

Division for Electricity, Department of Engineering Sciences, Uppsala University, PO Box 534, Uppsala

SE-751 21, Sweden^2

关键词: Control strategies;    Maximum power;    Non essential;    Tip speed ratio;    Total efficiency;    Turbulence influence;    Turbulence intensity;    Vertical axis wind turbines;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/3/032048/pdf
DOI  :  10.1088/1742-6596/753/3/032048

来源: IOP

【 摘 要 】

The influence of turbulence intensity (TI) on the tip speed ratio for maximum power coefficient, here called λCp-max, is studied for a 200 kW VAWT H-rotor using logged data from a 14 month period with the H-rotor operating in wind speeds up to 9 m/s. The TI - λCp-maxrelation is examined by dividing 10 min mean values in different turbulence intensity ranges and producing multiple CP(λ) curves. A clear positive relation between TI and λCp-maxis shown and is further strengthened as possible secondary effects are examined and deemed non-essential. The established relation makes it possible to tune the control strategy to enhance the total efficiency of the turbine.