District heat is a product that is predominantly generated in larger power plants through cogeneration, i.e. combined heat and power (electricity) generation. And this is how it works: the district heating is transferred by means of hot water that is transported through a pipe system to homes and factories. The heat is transferred to the buildings via the house transfer stations. The cooled off water is then returned from the respective buildings to the network. District heating is supplied to factories as process steam – under high pressure and at a temperature of several hundred degrees Celsius.
Combined heat and power generationDistrict heating from combined cycle gas turbine (CCGT) plants
Projects currently being funded
CO2 capture in oxyfuel coal-fired power plants
Higher pressure and lower flow losses in turbines
Capturing CO2 using coal gasification
CO2 scrubbing (post-combustion capture)
Hydrogen gas turbines
Higher temperatures in turbines
CO2 capture using lime or metal (looping)
Separating gases using membranes
Lignite drying
More flexibility for low-emission coal-fired power plants
International cooperation
More efficient generators thanks to nanoparticles
CO2 storage facilities
Micro gas turbines
Turbine combustion that produces lower amounts of harmful substances
CO2 compressors
Comparison of power plant systems
Efficiency of over 60% for the Irsching gas and steam power plant
Materials of construction for steam temperatures of over 700 °C
Storing electricity using compressed air
High-temperature heat storage systems for flexible CCGT power plants