The immediate proximity to the Lichtenbroich quarry pond makes it possible to use lake water. The lake water station is an important component of the energy concept. Here, two pipes are inserted into the lake: one into the upper and one into the lower water layers. Water from the lake water station flows through a strainer into a heat exchanger, which heats the lake water in summer and cools it in winter. Then the water flows back into the lake with a temperature difference of about 2-5° C (warmer or colder), biologically and chemically unchanged and thus harmless.
In the process, the quarry pond acts as a heat source in winter and a heat sink in summer. The water on the secondary side, which is heated or cooled by the lake, is then temporarily stored in a source reservoir and is then used either for direct temperature control of the building or as a source for the highly efficient heat pumps. The concept is complemented by an intelligent energy management system from Schneider Electric – the Microgrid Advisor. This links all energy generators – seawater, heat pumps, solar energy, hybrid coolers, district heating, energy storage and charging infrastructure – into an integrated energy infrastructure.