UJI EKSPERIMENTAL PENGARUH VARIASI RASIO PANJANG SUDU PENGGANGGU DENGAN SUDU UTAMA SETENGAH LINGKARAN TERHADAP KINERJA TURBIN CROSSFLOW POROS HORIZONTAL

Abstract

Energy is a basic requirement that cannot be separated from human-life. Meanwhile, conventional energy sources are dwindling because of conventional energy sources are non-renewable energy sources. A water turbine is a device that can convert water energy into motion energy which will generate electricity. However, the power produced by the crossflow turbine tends to be low, so it is necessary for development. The purpose of this study was to determine the turbine with the length-ratio of the interruption blades which has the most optimal power and efficiency. This research uses an experimental method by varying the length-ratio of the interruption blade with the half-circular main blade to the horizontal shaft crossflow turbine. The variation of the interruption blade length-ratio that will be used in this study has values: 1: 4, 1.5: 4, and 2: 4 which will be tested by variations in water with capacity of 9.572 L/s, 11.024 L/s, 14,322 L/s, 16,152 L/s, and 18,113 L/s. While the loading variation is 500 grams, 1000 grams, 1500 grams, and so on until the turbine stops rotating. The results of this study showed that a turbine with a interruption blade length ratio of 1.5 : 4 has the highest power compared to a turbine with a length ratio of 1 : 4 and 2: 4. The highest power is produced at a capacity of 18,113 L/s, with a turbine power of 4,461 watts at a load of 9000 grams. The highest efficiency is also produced by turbine with a blade length ratio of 1.5 : 4 at a capacity of 11.024 L/s, with an efficiency value of 96.20% at a loading of 5000 grams.

Keywords : Crossflow Turbine, Performance, Interruption Blade