Design and analysis of Analytical Model of an Archimedes Screw Turbine

Abstract

For centuries, Archimedean screws have been used to pump water, but mainly for that purpose. In recent decades, there has looked to be an increase in interest in using them as hydro turbines to produce electricity. While Archimedean screws are highly adapted that are used as pumps, research is currently being conducted to determine the characteristics that provide the highest performance when used as turbines. This study provides a simple but effective method for designing an Archimedean screw that may be used as a turbine. The methods for estimating the screw's outer diameter and efficiency are the most essential ones implemented in this study. The optimum of the power produced is the requirement applied for determining diameter. The diameter must be calculated by estimating the volume of the water buckets that develop between the screw blades. Although an analytical formula for this volume is nearly hard to discover, a rough approximation may be easily found. This preliminary estimate is then corrected using regression of data from turbines that are already operating at high efficiency. Finally, the rotational speed is then calculated depending on whether the rated discharge can pass through the turbine at the specified speed.