Design and Simulation of Archimedes Screw Turbine at Head Below 1 Meter
Keywords:
AST, Low Head, Performance, Small Flowrate, Theoretical EquationAbstract
Archimedes Screw Turbine (AST) is an environmentally friendly turbine and can be used at very low heads and small water flowrate which are in accordance with the characteristics of rivers in Indonesia. There is still a lack of research on AST in Indonesia and in order to obtain a theoretical equation to produce turbine performance Therefore, this study was conducted to design the AST, determine the theoretical equation for calculating AST performance, determine the optimum water flowrate, and analyze the characteristics of the AST against variations in the rotational speed of each flights, inclination angle, and optimum flowrate water. This research produces AST with one flight and two flights with optimum dimension. The theoretical equation has been formulated by producing an error from 8% to 0.4%. The optimum water flowrate in the AST for 1 flight is 4l/s, while for 2 flights is 8l/s. The maximum torque for 1 flight is 1.03Nm and for 2 flights is 2.14Nm with optimum rotational speed and an inclination angle are 14.7rad/s 290. The maximum turbine power for 1 flight is 15.14W and for 2 flights is 31.46W with optimum rotational speed and inclination angle are 14.7 rad/s 290. The maximum turbine efficiency for 1 flight is 80.70% and 2 flights is 82.68% with optimum rotational speed is 14.7rad/s and optimum inclination angle for 1 flight is 270 while 2 flights is 290.
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