Wastewater heats residential complex in Berlin

Climate-smart heat: In Germany Vattenfall uses wastewater to heat Berlin homes.

Grüne-Aue-area-in-Berlin-1920.jpg

In the Grüne Aue-area in Berlin, 113 homes at a total of 11,400 square meters are using waste water for heating.

Wastewater heat pumps are so far quite unusual in the housing industry. In the heating solution for the “Grüne Aue” residential area, Vattenfall’s Energy Solutions Germany has made use of this technology as part of a really climate smart combined plant. The heat from the wastewater covers around 20 percent of the overall heat demand of the residential area.

Christian Feuerherd, Head of Energy Solutions Germany, is proud of his team's performance: "In new buildings, we always deliver  high energy-efficient, decentralised heat from micro CHPs combined with boilers. But by integrating a wastewater heat pump we will now reduce the CO2 emissions by an additional 25 per cent or 22 tonnes of CO2 per year.” 

Heizung-mit-Abwasserpumpe-upscale.jpg

Wastewater pump (centre)

Extraordinary technology mix

The heat supply for the “Grüne Aue” district is provided by a combination of three different technologies. In addition to the wastewater heat pump, a combined heat and power unit (CHP) and a condensing boiler are used in the heating solution. The annual heat demand is 740 megawatt hours.

The heat pump uses the temperature of the wastewater to generate heat for the houses and thus contributes to the decarbonisation of the area. The electrical energy for the heat pump is covered by the micro CHP which generates heat and power in a combined process. The condensing boiler is only used to cover the heat demand at peak times.

boiler-room-1920.jpg

 View into the boiler room with the heat pump (front left in grey)

The heat is distributed via a local heating network with a length of one kilometre. The unique combined system is supplemented by remotely readable heat meters that enable fully automated metering.

The combined heating system is owned and operated by Vattenfall while the customer buys the produced heat.

See also

Illustration of rock cavern storage facility for fossil-free hydrogen

HYBRIT: SSAB, LKAB and Vattenfall building unique pilot project in Luleå for large-scale hydrogen storage investing a quarter of a billion Swedish kronor

SSAB, LKAB and Vattenfall have commenced building a rock cavern storage facility for fossil-free hydrogen gas on a pilot scale next to HYBRIT’s pilot facility for direct reduction in Luleå.

Read the full article
Jan Moström, President and CEO LKAB, Martin Lindqvist President and CEO SSAB and Anna Borg, President and CEO Vattenfall.

HYBRIT: SSAB, LKAB and Vattenfall to begin industrialization of future fossil-free steelmaking by establishing the world’s first production plant for fossil-free sponge iron in Gällivare

SSAB, LKAB and Vattenfall are now taking a new, decisive leap forward in their work to make fossil-free steel for the global market. Industrialization of the technology being developed throu...

Read the full article
An all-electric heavy truck from Kaunis Iron in pilot project with Vattenfall, among others, to develop a sustainable logistics system

All-electric heavy truck challenges the Arctic climate

Can electrically powered heavy trucks function in 44 °C below zero in northern Sweden? Kaunis Iron is now collaborating with Vattenfall, Volvo Trucks, ABB and Wist Last & Buss in a uniqu...

Read the full article