# KAJIAN EKSPERIMEN KINERJA TURBIN ANGIN SAVONIUS SUDU OVERLAP BERPROFIL MYRING n=1 DENGAN VARIASI SUDUT STAGGER SILINDER DI DEPAN SUDU RETURNING

### Abstract

The previous Savonius wind turbine studies have proved that overlap

modifications to conventional blades can improve turbine performance. With these

conventional blades, the performance is less optimum because the drag force generated by

turbine's rotation is still high. Based on this condition, this experiment is conducted by

modifying Savonius wind turbine with overlap blades using Myring equation n = 1. Its

blade profile is made half-elliptical to reduce drag force. Diameter and height of the

turbine are 400 mm with 0.3 overlap ratio. The ratio of cylinder diameter (ds/D) is 0.4, and

the ratio of cylinder center distance (S/d) is 1.7. Experiments are conducted by varying

stagger angles of circular cylinder in front of returning blade i.e 45°, 50°, 55°, and 60°. Its

wind speed variations are 5 m/s, 6 m/s, and 7 m/s. The final results show that the best

performance improvement of the turbine occurs at 60° stagger angle and 6 m/s wind speed.

The increase in torque coefficient is 4.95% and power coefficient is 20.16% to overlap

Savonius wind turbine with myring n = 1 with no circular cylinder