Performance Analysis of Vertical Shaft Savonius Water Wheel with Number of Blade and Discharge Variations

Fluid is a substance that can flow and conform to its container. Any substance or material that experiences movement or moves from one place to another will produce energy and this energy is strongly influenced by the physical properties of the fluid which is the source of this energy. Because of the same fluid properties, Savonius can also be applied to water flows. The Savonius waterwheel is a simple water-wheel that works because of the different forces on each blade. The concave blade (concave) facing the direction of the water will catch the water and force the blade to rotate on its axis and the convex blade (convex) which is pushed by the fluid flow also causes the blade to rotate even though there is a load caused by the convex part when pushed by the flow. This study determines to analyze efficiency and power of vertical shaft savonius water wheel with four blades and six blades on discharge variations. The best performance of the vertical shaft savonius water wheel with four blades is on load of 1.5 kg, the highest efficiency 17.16% and the highest water wheel power 1.317 watts with discharge of 0.629 m 3 /s. For the best performance of the vertical shaft savonius waterwheel with six blades on discharge 1 (0.629 m 3 /s) produced the highest power of 1.248 watt and the highest efficiency 15.92% at load of 1.5 kg.