STUDI EKSPERIMENTAL PENGARUH ASPEK RASIO TERHADAP UNJUK KERJA TURBIN ANGIN CROSSFLOW

Wind energy has been referred to as one of the primary renewable energy sources since 2000. Its axis-based concrete wind turbines are horizontal wind turbines (HAWT) and vertical wind turbines (VAWT). VAWT are generally in urban areas with an average speed that is relatively small and its direction is variable. VAWT is divided into several types, namely Savonius and Darrieus turbines. Cross-flow wind turbines derived from the concept of banki water turbines can be an alternative to extract potential wind energy into electrical energy. Cross-flow turbines have a simple design. Can be used and can produce high torque at relatively low speeds. Many designs of geometry design in cross-flow with the aim of improving the performance of the turbine. The aspect ratio (H / D) is one of the parameters that can affect the performance of a crossflow wind turbine. This ratio is used to measure the crossflow ratio aspect. Variation in aspect ratio (H / D) which is 1, 1.56 and 0.64 with number of blades 16. If the number of blades is carried out with 5 different wind speeds of 4.99 m/s, 5.94 m/s, 6.49 m/s, 6.99 m/s and 7.27 m/s. The experimental results show the highest speed in the wind turbine with an aspect ratio (H / D) of 1.56 at a wind speed of 7.27 m/s. The highest rotation speed is 313 rpm