The GeoSave system in Braakin Hamburg is the biggest groundwater geothermal system of Northern Germany. With seven groundwater circulation wells and a heat pump cascade, it supplies heat and cold energies to the highly modern new construction of the commercial enterprise, Boltze. As the system has a monovalent design, it neither emits exhaust gas nor releases any noise in to the environment and thus, fulfils the requirement of sustainability and modernity as specified by the builder. The groundwater circulation wells extract groundwater from approximately forty meters, direct it to the heat pump and finally refeed it into the aquifer. The well for refeeding the groundwater is located approximately twenty meters above the well which extracts the groundwater. Thus, it circulates through long routes via the aquifer and in this process, obtains geothermal heat. This heat pump uses this heat for heating the building. In summer the groundwater circulation well provides cooling to the offices thus rendering an energy-intensive air conditioner.
Exterior shot of the new administration building