The use of phase shift angle (PSA) on double stage savonius wind rotor with three points configuration semi-elliptical blade shape

Installation of wind turbines as power plants in tall buildings in urban areas can be an alternative energy source. However, urban areas usually have erratic wind conditions. Savonius wind turbines can choose because they have several advantages than the others such as able to rotate at low and variable wind speeds, simple construction, low production costs, and high starting torque. However, the Savonius turbine had a disadvantage of low efficiency. This study was carried out experimentally to study the performance of double stage Savonius wind turbine using a phase shift angle (PSA) and semi-elliptical blade shape with three-point configuration. This turbine used two blades, and the use of double stages done by stacking two turbines. The use of wind tunnels as a source of wind was carried out for data variations., The turbines adjusted with PSA 0⁰, 30⁰, 45⁰, 60⁰ before testing. The test results showed that the use of a phase shift angle on a turbine with this semi-elliptical blade affects turbine performance. (paper)