Design of a micro-scale wind turbine with horizontal axis using airfoil NACA 4412

The high demand for electrical energy leads to the depletion of fossil fuel reserves. Therefore, alternative energy is required to overcome the scarcity of fossil fuels. Regardless of the fact that natural resources are renewable as alternative energy such as wind, water, ocean waves, and sunlight. Wind on the south coast of Malang, Indonesia provides good potential as alternative energy. The design in this paper is focused on designing a horizontal axis wind turbine with 4 blades with a length of 50 cm utilizing the NACA 4412 Airfoil profile. The wind turbine is designed utilizing a low-speed permanent magnet generator around 500-1000 rpm to produce a design power of 100-125 Watt and the maximum power of the generator of 270 Watt. The wind turbine that has been designed has a tower-shaped support that uses iron pipes and is pulled by 4 steel ropes that are plugged in each pointing to the 4 cardinal directions.