Berlin-Neukölln, Germany
The Neukölln district heating plant provides heat and electricity using a range of
fuels: Natural gas, fuel oil, wood and hard coal are burned in 7 large boiler
plants and 8 CHP units. Heat is stored in a 10.000 m3 reservoir, providing a
thermal capacity of around 300 MWhth. The district heating network is 120 km
long and supplies approximately 440 GWhth per year at a supply temperature of
up to 115°C.
The newly installed heat pump uses the waste heat from the CHP charge-air
coolers. The LHP has a thermal nominal power of 1,2 MWth, employs a
reciprocating compressor and ammonia as a refrigerant. It converts hot water at
a temperature of about 50 °C to 85 °C hot water to increase the return flow of
the district heating network.
In the Real-World Laboratory the integration of the LHP in the district heating
network and the optimal application regarding grid friendliness and economic
efficiency is being investigated.