Dagab, a logistic services company for the food industry teamed up with Vattenfall to provide surplus heat from their warehouse in Jordbro, Sweden. This partnership, a part of Vattenfall’s business model named SamEnergi, provides 7 500 MWh of heat annually to the district heating network that would have otherwise been wasted. This means a reduced carbon dioxide load of nearly 100 tonnes per year.
Waste heat from data centers
In Vattenfall's own Hamburg office building we take waste heat from the IT server room. We own and operate 600kW heat pumps in the basement of our 13-story Hamburg offices (50k m^2). These heat pumps are integrated into the city wide Hamburg network providing a low carbon source of heat. The 2x 300kW heat pumps were manufactured by Ochsner. The heat pumps use rejected heat from the IT server room and raise this to 45 degrees for the low temperature network operating in the building. They are highly efficient, using turbo compressors and magnetic bearings to minimise friction losses as the drive shaft ‘float’ in the magnetic field allowing up to 40,000 rpm. These heat pumps have delivered a COP of over 8 in operation. This reduced the buildings CO2 impact by over 600 tonnes of CO2 per year.