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Abstract: While wind energy is widely used across the world, its utilization, especially in cases where the speed of wind is low, has not been optimized. This study aimed at establishing the impact of pitch angle magnitude utilized in horizontal wind turbines at low speed. A NACA 6412 type airfoil made from mahogany’s wood was installed to a wind tunnel to measure the performance. The effect of pitch angle was determined at low wind speeds using 0ᵒ, 2ᵒ, 4ᵒ, 6ᵒ, 8ᵒ, 10ᵒ, and 12ᵒ angles. The speed was varied between 1 m/s and 5 m/s. The wind originated from a blower installed and was controlled by an anemometer to determine the speed. The findings of the study established that the variation of pitch angles results to differences in power and rotation of the rotor produced by the wind turbines. The output of the experiment was current and voltage converted to power and total efficiency. The highest electrical power of 9.7240W was produced at the most optimal pitch angle of 8 ° and a wind speed of 5 m/s. In the end, the study showed that horizontal wind turbines with NACA 6412 and 8ᵒ pitch angle produce the highest total efficiency at 11.2% and 5 m / s speed.

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