DefinePK

Abstract

The study of Archimedes screw turbine as a micro-hydro power-plant is being developed in this decade. Screw turbine has some advantages, namely no need draft-tube, fish-friendly, and can be operated in low head (H<10 m). The aim of this research is to recognize the performance of Archimedes screw turbine due to flow rate effect and its slope and also to reveal flow phenomenon that occurred among blades of the screws. Physical model of the screw turbine was made with acrylic as represented laboratory scale. Geometrical shapes are three blades, screw angle of 300, ratio radius of 0.54, pitch of 2.4Ro. Measured and observed variables are turbine’s rotation, torsion, and flow visualization with inlet flow rate variable (c0) are 0.3 m/s, 0.4 m/s, and 0.5 m/s, respectively. And the turbine’s slope variables (a) are 250, 350, and 450. According to experimental data, the maximum turbine efficiency is 89% that occur at 0.5 m/s of flow rate and 250 of shaft slope. The result of this research reveals that the largest hydraulic power occurs in the turbine shaft’s slope (a) of 450 in the amount of 16.97 with turbine’s rotation of 350 rpm. Output power of screw turbine occurs in the turbine shaft’s slope (a) of 450 in the amount of 5.11 watt and rotation of 182 rpm. The highest efficiency is 89% occur in turbine’s rotation of 50 rpm in the turbine shaft’s slope of 250 with y = 1R0. The result of this study show that the performance of the screw turbine is more maximum on the lower shaft’s slope that automatically become better operating in low head and rotation.