Modern Archimedes Screw

Modern Archimedes Hydro Screw

Archimedean screw turbines

The modern Archimedes hydro screw is used as Archimedes screw pumps and Archimedean screw turbines or 

.

 

Archimedes screw pumps can lift large volumes of water against low heads, and so is popular for use in drainage systems in flat countries like The Netherlands.

Archimedes screws are popular in sewage treatment and waste water plants because they cope well with varying rates of flow and with suspended solids.

 

Basically, the Archimedes screw consists of an inclined shaft to which one or more helically wound blades are attached. This spiral is fitted into a semi-circular or circular casing called the trough. When the screw is rotated, the water confined between two successive blades, the wall of the casing, and the shaft is lifted.

Archimedes screw pumps and generators at Tees Barrage London

               Figure above of an Archimedean hydro screw pump, open screw type 

 

Archimedes screw Turbine/Archimedean Screw Generator

 

Is the Reverse action of Archimedes hydro screw pump

If water is poured into the top of an Archimedes screw, it will force the screw to rotate. The rotating shaft can then be used to drive an electric generator. Archimedes screw Turbine installation has the same benefits as using the screw for pumping: the ability to handle very dirty water and widely varying rates of flow at high efficiency. There are tens of reverse Archimedes screw micro hydro schemes operating in England.

 

The Archimedes hydro screw generator is Fish Friendly and safe for fish to pass through and can serve as a fish ladder.

 

The Archimedes screw generator is safe for fish to pass through

 

Image above shows a typical setup of Archimedean Screw Turbines or Archimedes Hydro Screw Generator