Sewage water heating pool water
The Raalte swimming pool has been heated with sewage heat since 2013. From the nearby sewage treatment plant, ‘clean’ sewage water with a temperature of 10-15 degrees Celsius is pumped towards the pool. Heat exchangers are installed in the pipes. The pool water is then brought up to temperature with a heat pump.
To achieve the desired temperatures, 40,000 liters of water per hour are pumped through the 600-meter pipeline from the sewage treatment plant to the swimming pool. there, 6 to 7 degrees is extracted from the water and via 4 heat pumps upgraded to max. 43 degrees Celsius.
The annual savings for this pool is about € 25,000. Visitors are informed of the system and the realized savings via screens.