Increasing the output power and torque on the Savonius multilevel wind turbine as an effect of angle setting deflector at bottom rotor

Savonius turbine is one of the most commonly used types of wind turbines. This is based on the construction which is an upright axis wind turbine so that it has a large initial torque rotation at low wind velocity. The large torque produced comes from the flexibility of the turbine blade in receiving wind from all directions. Such conditions make Savonius wind turbine blades have great potential to be engineered to produce the best performance. One form of engineering is by adding a deflector between the outer blades slits. Therefore, this study aims to analyze and obtain the value of Savonius wind turbine output power overlapping with the definition of deflector on the lower rotor and the variation of the effective angle of the upper rotor. This research is quantitative with the true-experimental method. The steps began with the creation of research objects such as the Savonius wind turbines and the search for other equipment such as gearboxes, generators and LED lights. Then the object will be given the title of artificial wind fluid from the blower to determine the performance of the wind turbine. Based on the results of the study it can be seen that the position of the deflector angle of 45° and the effective angle of 20°, 40°, 60° produced the highest output power value reaching 2.6544 Watts and the torque value reaching 118,997 Nm. The results also showed that the position of the 45° deflector angle and the effective angle of 40°, 40°, 60° obtained the most optimal mean value of output power and torque.