Stuttgart-Münster, Germany
The waste-to-energy CHP plant generates electricity and heat in 3 coal-fired and
3 waste-fired boilers. The heat is distributed through a nearly 275 km long
network around the city. The network reaches supply temperatures up to 130°C
and provides for about 17 % of Stuttgart’s households.
The newly installed heat pump is a first step towards climate neutrality. The
river heat pump uses the cooling water of the waste-to-heat CHP and thus the
waste heat to provide district heating water up to a temperature of 90°C. The
LHP has a nominal thermal power of 20,5 MWth, uses a four-stage turbo
compressor with an intercooler and operates with the refrigerant R-1234ze(E).
In the Real-World Laboratory the integration of the LHP in den district heating
network and the optimal application regarding grid friendliness and economic
efficiency is being investigated.