Performance improvement for vane type vertical axis wind turbine with movable vanes

This paper presents vane type vertical axis wind turbine (VVAWT) aerodynamic performance assessment, which includes movable vanes. Vertical wind turbine with 3-bladed movable vanes with the top and bottom boards is designed using rotor diameter and rotor height of 0.085 m and 0.11 m, respectively. The design increases the torque on the side of the model, which rotates in the direction of the wind, thereby enhancing the drag coefficient C_d and reducing the negative torque on the opposite side of the blade, which revolves against the wind. This mathematical model examines wind power, theoretical power at turbine shaft and the power coefficient C_P at a range between 4 m / s and 22 m / s at a variety of wind speeds. The results show that the turbine’s capacity (1.2 Watt compared with upper and lower vane types) is growing for new wind turbines with good technical properties and can more efficiently be used to generate power at low wind speeds (power coefficient of C_P = 0.25) compared to vane models without upper or lower boards.