Abstract
Wind energy is the cleanest form of energy, abundantly available in nature. There is a major concern growing in the world for substituting fossil fuel by renewable energy to cut off the emissions. Energy extracted from the wind can be classified into high power and low power energy. Savonius wind turbine can produce energy from poor wind conditions. Savonius wind rotor has many advantages over others in that its construction is simpler and cheaper. It is independent of the wind direction and has a good starting torque at lower wind speeds. The wind blades are designed using CAD software. Design is varied by helical angles such as 90° and 110°. The design was carried out for three-bladed and two-bladed savonius turbines. A commercial CFD software is used for simulating the blade profiles by varying the tip speed ratio ranging from 0 to 3 with an interval of 0.2 for constant wind speed. From the validation process, the result produced shows that the most efficient blade profile was 3 bladed Savonius Vertical Axis Wind Turbine with a helical angle of 110°. At a tip speed ratio of 2.6, it produced a cp of 0.48.
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