The Archimedean screw pump is attributed to mathematician and inventor Archimedes who lived in the third century BCE. Archimedes was asked to design an instrument to remove water from the hold of a large ship. However, there is some evidence that screw pumps were used as irrigation tools as early as the seventh century BCE. Archimedes did not claim credit for the screw pump. It was Diodorus of Sicily, a Greek historian who wrote that Archimedes had invented the pump.
The Archimedean screw pump is still one of the most efficient pumps in the world today and is used primarily in for wastewater and drainage.
The power-generating Kuhn KWKS Hydropower Screw Pump is sustainable, efficient, reliable and economical. Powered by the height difference of the water and a flat angle of installation, the mechanical force of the water is converted into electrical energy and heat.
Features
The KWKS Hydropower Screw Pump is suitable for irrigation channels, small hydroelectric stations, and clean wastewater discharges. Features include:
Low maintenance and operational costs
Delivers around 85% efficiency — efficient even at low capacity
Compact screw
Synchronous or asynchronous generator
Optional heat exchanger
Limited to an elevation change of 8 m and a water flow rate of 10 m3/s
The Kuhn KWS Archimedean Screw Pump is unsurpassed by any other type of pump in terms of technology and efficiency. Operational reliability combined with a long service life makes it an economical conveying system – especially for wastewater.
These pumps are mainly used as intermediate lifting stations in sewer networks, as inlet pumps for sewage treatment plants and as sludge return pumps.
Features
The superior design of both the components and the screw itself ensures extremely cost-effective operation and the long-term security of investment. Features include:
Extremely durable, low-maintenance and operationally reliable
High efficiency ratios with an extensive control range (no loss of suction power or pressure)
A gentle conveying process for biological cultures with no adverse effect on sedimentation properties or floc structure. All this facilitates conversion of sewage to a condition that allows clarification
Conveys raw wastewater with the gross debris with no additional screening at pump stations
The Kuhn Hybrid Screw Pump uses the screw trough as a large-surface heat exchanger by integrating water-conveying channels. In the secondary circuit water flows along the rear side of the trough and takes up wastewater heat. It then is transported to a commercial heat pump where the temperature level is increased and supplied to the consumer for use. This process does not impair the primary function of the screw.
Features
The Hybrid Screw Pump combines a screw pump and heat exchanger in a partnership to generate savings. Features include:
Reliable, efficient and low maintenance
Long service life
Flexible feed rate
Dry run protection
Self-regulating
Screw trough used as a heat exchanger
Turbulent flows with high Reynolds numbers results in optimal heat transfer
Rotational motion resulting in a larger wetted surface than in the channel
Steel-made heat exchanger
Heat exchanger has no impact on the primary function of the screw.
