Variable pitching study of small scale vertical axis wind turbine

A variable-pitch small wind turbine has lots of energy assurance, which is harnessed from wind and can be made available for domestic application. These small wind turbines can be employed for electrical power generation by mounting them on house roofs, building towers, highway roadsides, gardens, and parks. Employing a pitching mechanism to make a variable pitch turbine has more scope for electricity production by rotating the turbines by the wind. Initial starting difficulty, along with improvement of the performance in terms output power of the turbine, is addressed by variable pitch small turbine. This research work explains the aerodynamic behavior of the turbine obtained by simulation code. It also compares tangential forces for constant/fixed and changeable pitch turbines. The Six Variable Pitch Curves, which are designed for maximum power coefficient, are used for this turbine, and performance analysis of these variable pitching is carried out. Mathematical models: single and multiple stream tubes are introduced for the present analysis. The six optimized pitch curves, namely BPS-1 to BPS-6, are studied in the six ranges of tip speed ratios with 0.5 intervals. The 54% to 75% gain of power coefficient is reported from the present variable pitching analysis.