Analisis Pengaruh Kecepatan Angin Dan Overlap Ratio Terhadap Kinerja Turbin Angin Savonius Tipe-U
Keywords:
performance, overlap ratio, coefficient power, wind speedAbstract
One of the important elements that can influence a country's economic growth is energy. Wind energy is the most economical renewable energy source compared to other energy sources, being very clean, environmentally friendly, and pollution-free. Therefore, small-scale wind power plants are highly sought after in many countries. This research aims to analyze the influence of wind speed variation on the Overlap Ratio of U-type Savonius wind turbines, and compare the performance of three turbine models: conventional, 10% Overlap Ratio, and 12.5% in generating Coefficient of Power (CP). The Prony brake method was used to measure torque on the turbine shaft. Based on calculations and testing, it was found that Overlap Ratio modification significantly influences and improves turbine performance. The turbine with a 12.5% Overlap Ratio achieved a maximum CP of 0.45 at a Tip Speed Ratio (TSR) of 0.75 with a wind speed of 4 m/s, resulting in a performance improvement of 12.5% compared to the conventional model. Conversely, the turbine with a 10% Overlap Ratio only increased performance by 2.5%, with a maximum CP of 0.41. The larger gap in the 12.5% Overlap Ratio allows for more optimal air flow transfer from the advancing blade to the returning blade, resulting in better pressure distribution between the turbine blades. The research results show that increasing the Overlap Ratio improves wind flow between the blades, thereby enhancing Savonius turbine performance. This study provides a basis for more effective Savonius turbine applications in the future.
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