Ikea applies heat pump with bore hole storage for heating. The goal is to supply 100% of the heat demand by renewable energy sources by 2012. The plant in Karlstad, Sweden, coveres 85 procent of the heat demand for the 24,000 m2 warehouse by the heat pump storage system. Additional systems are planned in Malmö, Uppsala and Helsingborg.
The system consists of 101 bore holes with a distance of 5.5 m and a depth of 120 m, sizing the capcity of 1,200 kW. In winter electrical heating is necessary to meet the demands. The system has an impact of 2,200 CO2-reduction.
These storage types are developed for district heating in combination with solar heating, recovering the storage with solar energy during summer.