Context

Wilo high-efficiency pump technology was used for the heating, cooling and water supply systems of the Department for Urban Development and the Environment (BSU), Hamburg. The building, which uses geothermal energy, thermoactive ceilings and a sophisticated ventilation system, was awarded an "Excellence Pass" by the Hamburg International Building Exhibition (IBA) and has received a Gold certificate from the German Sustainable Building Council (DGBN).

Geothermal energy

Geothermal energy - a renewable energy source - forms the basis of the building's energy requirements. Thermoactive ceilings regulate individual room temperatures, with heating, cooling and water supply systems operated by Wilo high-efficiency pumps. Two brine/water heat pumps provide the building with hot water through a brine circuit.

Two-stage summer cooling 

Wilo inline pumps provide reliable, energy-efficient operation of the heating and cooling circuits. CronoTwin-DL-E double pumps control the cooling requirements; VeroLine-IP-E inline pumps are installed for the brine and heating circuits.

Thermoactive ceilings

Two 5000-litre capacity buffers regulate room temperature. VeroLine-IP-E inline pumps manage the circulation of the water from the buffers to the thermoactive ceilings of each five-storey building sector. For the high-rise building, two Wilo-Stratos high-efficiency pumps provide a maximum flow of 30m3/h for the thermoactive ceilings.

Water and wastewater handling

Wilo's Comfort-Vario pressure-boosting pump technology is used for the building's cold water supply network, which utilises rainwater collected from the roof surfaces and passed to a storage tank and circulated through a grey water network. In addition, Wilo submersible sewage pumps and lifting units are used to transfer sewage to Hamburg's drainage network.