If without using an end plate, the wind direction is more spread out. From the main background of end plate testing, a study was conducted entitled "The Effect of End Plates on the Performance of Savonius Wind Turbines as Electric Power Generators". The test results show that with the same wind speed, it can produce greater turbine rotation if using an endplate compared to without using an endplate, from the results of the study at the same wind speed of 6.1 m / s it produces a rotor rotation of 652.5 rpm, Tip Speed Ratio 0.8, power coefficient 0.5. In the turbine using endplate, this result is greater than the turbine without endplate by 488.9 rpm, Tip Speed Ratio 0.4, power coefficient 0.2. The efficiency of the generator using endplate is better than without using endplate. Namely the maximum efficiency produced is 13.76% at a wind speed of 3.8 m/s. While without using endplate the maximum efficiency produced is 7.06% at a wind speed of 3.5 m/s.
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