Xylem is claiming that it has reduced the energy consumption of a wastewater pumping station in Sweden by 50% using its Flygt Experior solution. At a second station also in Sweden, according to Xylem, its Flygt SmartRun control system, one component of the Flygt Experior solution, has cut the energy use of the station by 30%
Built in the early 1970s and serving approximately 450 households, Dalarna station is located in central Sweden. The station connects to a 300 m long pipe, pumping wastewater from one side of a lake to the other. Melting snow, as well as heavy rainfall during spring, dramatically increases the inflow to the station. To prevent flooding, over-sized pumps were installed that consumed more energy than necessary when running at normal inflow. Xylem was tasked with installing a system that could handle severe variations in flow more efficiently.
Xylem’s Flygt Experior system, including the Flygt SmartRun control and a Flygt N-pump were installed at the station in July 2012.
Anders Fredriksen, head of wastewater transport with Xylem said, “A key feature is the patented energy minimiser function which reduces energy consumption compared to conventional on/off systems. This makes SmartRun suitable for use in a pump station where the inflow varies considerably and the friction losses are greater than the losses of the static head.”