Abstract
The increasing needs for energy and the depletion sources of fossil fuels required the use of renewable and clean energy sources. Wind energy is a renewable energy that demand is high right now because it is easily obtained, abundant and environmentally friendly. Wind turbines use the available kinetic energy of the wind to be converted into mechanical and electrical energy. Savonius is vertical types of wind turbines that have advantages such as construction, low investment costs, and high-speed initial torque. However, Savonius turbines have a disadvantage of low efficiency. This research aims to improve the performance of the Savonius wind turbine by using a slotted blade. In this research, conventional Savonius rotor experiments were carried out and approved by the slotted blade by varying the slot position. Blower fans are used as a source of wind with variations in wind speed from 5.94 m / s to 7.27 m / s. The results showed that the use of a slotted blade could increase coefficient power of the Savonius turbine 0.95 with a variation of the slotted blade at 25% position and an increase of 14.4% compared to conventional Savonius turbines.
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