Sustainability

Clean thermal energy for a new part of town

Low CO2 emissions thanks to overlapping solutions: HafenCity’s energy concept makes use of all potential savings; remote and local district heating sources - e.g. from decentralized geothermal or solar thermal plants - complement each other for an effective energy mix

The sustainability of HafenCity’s heating supply is well established. All buildings in western HafenCity are connected to the cogeneration-based Hamburg Vattenfall district heating network, which is supplemented in HafenCity by solar thermal power (1,800 sqm of solar thermal systems are installed on rooftops in western neighborhoods, providing 40 percent of hot water requirements there), as well as other CO2-reducing generating plants (such as the steam turbine in the HafenCity heating plant), which together have since 2002 provided an efficient mix of energy with CO2 emissions averaging 240 g/kWh. 

Thanks to its decentral, modular local heating supply network, eastern HafenCity have been able to boast CO2 emission rates of only 89g/kWh since 2009. The decentralized structure of this supply system, which is operated by Enercity, a subsidiary of the Hanover public utility, is designed to grow in tandem with the city district. The first building block in the network is the temporary power plant in Oberhafen. HafenCity’s heating concept features substantial use of renewable energy: 92 percent of all power used is produced regeneratively – except at peak times. The primary energy factor is 0.11.

Since mid-2019 waste process heat from the Aurubis copper refinery supplies eastern HafenCity with heat. The advantage: waste heat causes almost no CO2 pollution and exudes no nitrogen oxide. This obviates the need for HafenCity to have a heating plant of its own.