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 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.