PENGARUH VARIASI RASIO SUDU PENGGANGGU DENGAN SUDU UTAMA BERPENAMPANG PLAT DATAR TERHADAP DAYA DAN EFISIENSI TURBIN CROSSFLOW POROS HORIZONTAL

Abstract

The increasing population growth is directly proportional to the energy demand. Micro Hydro Power Plant (PLTMH) is a small-scale power plant that utilizes the potential energy of water. Crossflow turbine is an alternative in the manufacture of PLTMH because it is classified as a low head turbine. The purpose of this study was to determine the effect of variations in the ratio of the interfering blade with the main blade with a flat plate section on the power and efficiency of a horizontal axis crossflow turbine. This study uses an experimental method by varying the ratio of the interfering blade with the main blade of 0, 0.25, 0.5, and 0.75 with a flat plate cross-section model on a horizontal axis crossflow turbine. The number of blades used are 6 main blades and 6 interfering blades which will be tested with variations in water capacity of 11.0231 L/s, 14.3205 L/s, 16.1506 L/s, 18.1116 L/s. and load variations for power and efficiency. The results of this research show that turbines with an interfering blade ratio of 0.75 have the most optimal performance compared to ratios of 0, 0.25, and 0.5. The highest power is obtained by a turbine with a blade ratio of 0.75 at a capacity of 18.1116 L/s with a loading of 6500 grams of 4.040 Watt. The highest efficiency was obtained at a blade ratio of 0.75 at a capacity of 11.0231 L/s with a loading of 2000 grams of 72.65%.