SCREW HYDROPOWER GENERATOR
This study investigated how power and efficiency in Archimedes screw turbines
(AST) is impacted by varying parameters including; length, inner and outer
diameter, pitch and number of flights.
Archimedes screw generators (ASGs) can be used in low-head hydro sites as a source of micro-
hydroelectric power generation. ASGs are an adaptation of the Archimedes screw, a helical
surface surrounding a central cylindrical shaft inside a hollow pipe that is used to carry water to
higher elevations. Water at higher elevations can be translated down the length of the screw due
to the hydrostatic forces from the fluid on the screws surfaces, the resulting rotation of the screw
drives a generator that creates efficient, cost effective and clean electricity. Such a device is often
referred to colloquially as an Archimedes Screw Turbine (AST), although the AST is actually a
quasi-static pressure machine, rather than a true turbine.