Pump replacement leads to energy savings at two Swedish pumping stations
Xylem Inc. has reduced the energy consumption of a wastewater pumping station in Sweden by 50% using Flygt Experior solution. At a second station also in Sweden, Xylem’s 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-meter 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, oversized pumps were installed that consumed more energy than necessary when running at normal inflow. The challenge to Xylem was to install 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.
At another pump station in Sigtuna, Sweden, outside Stockholm, Xylem installed a Flygt SmartRun pump controller on each pump in the station. The Sigtuna station was built in 2006 and has an inflow of approximately 65,000 cu meters annually. Since installation in 2011, the SmartRun controller has reduced the energy consumption of the station by 30%, according to tests.