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Experts say that the number of threads has an influence on the performance of the screw turbine. The general objective of this study is to obtain a comparison between the performance of a screw turbine and the number of screws. The specific objective of this research is to find out the results of screw type turbine testing, variations in changes, and comparisons between power, torque, and efficiency of screw turbines. The research method used in this study is the experimental method. For the data collection process, the first thing to do is to prepare the tools and materials needed and for the research location itself, it is located on the Harapan University Medan campus in the Production Process Laboratory of the Faculty of Engineering and Computers. The data collection process itself starts with measuring discharge, Rpm, braking power, and testing power. The result of his research is that the number of threads greatly affects the performance of the turbine. The best result goes to a turbine with a screw count of 10 with a Q1 water discharge of 0.0005m³/s with the highest rotation, torque, power and efficiency results compared to a turbine with a screw count of 15, a turbine with a screw count of 10 produces 96.2 RPM rotation, hydraulic power 1 .95 watts, braking power 0.39 N, torque 0.029 Nm, mechanical power 0.068 watts and efficiency of 3.48%. Furthermore, from the results of the turbine test analysis with a screw count of 10 and 15 threads, the best results were found in a turbine with a screw count of 10.
Keywords: number of threads, archimedes screw turbine performance, screw turbine
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