We use the screw trough as a large-surface heat exchanger – with outstanding properties and effects:
- Turbulent flows with high Reynolds numbers at boundary surfaces result in optimal heat transfer coefficients
- Heat exchanger made of steel with very good heat conductivity
- Rotational motion results in a far larger wetted surface than in the channel
- Residue-free contact surface
- Continuously self-cleaning and maintenance-free – for decades!
- Does not interfere with the conveying process
- Visible and accessible at all times
The steel screw trough becomes a heat exchanger by integrating water-conveying channels. In this secondary circuit, water is guided along the rear of the trough, absorbing part of the wastewater heat and transporting it to a commercially available heat pump. This heat pump increases the energy level and makes it available to consumers.
What is so special about this solution? The screw’s actual function is not affected in any way.
This adds up to huge potential savings for municipal and industrial customers!