Borehole Thermal Energy System
The Borehole Thermal Energy System is located underground to store large quantities of heat collected in the summer to be used in the winter. It consists of 144 boreholes, which stretch to a depth of 37 m (121 ft). At the surface the pipes are joined together in groups of six to connect to the Energy Centre. The entire BTES is covered by a layer of insulation, on top of which a park is built. When the heated water is to be stored, it is pumped through the pipe series. The heat is then transferred to the surrounding soil as the water cools and returns to the Energy Centre. When the homes need heat, water flows to the centre of the BTES field and picks up the heat from the surrounding soil. The heated water then goes to the short-term energy tank in the Energy Centre and is pumped through the District Heating Loop to the homes.
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