CFD Analysis for Combination Savonius and Darrieus Turbine with Differences in the Number of Savonius Turbine Blades

Many countries have realized the importance of using renewable energy sources as a substitute for nonrenewable energy. Indonesia has relatively small wind energy potential due to its geographic location, which is located on the equator. Its utilization target is to find areas with low wind speeds because the potential for development is still widely available. The Savonius-Darrieus turbine combination is an option to enhance additional capabilities in energy extraction. In this research, CFD analysis compared the combined performance of the Savonius 2 blade turbine - 3 blade Darrieus turbine and 3 blade Savonius turbines - 3 blade Darrieus turbine using Solid Work simulations with different wind speeds for 2, 3, 4 m/s. The simulation results showed the combination design of the Savonius 2 blade turbine - 3 blade Darrieus turbine has greater power 0,54 watt than the 3 blade Savonius turbine - 3 blade Darrieus turbine combination at wind speed for 4 m/s.