Mellach Combined Cycle Gas Turbine Plant

VERBUND's Mellach combined cycle gas turbine power plant is a highly efficient thermal power plant located in the municipality of Mellach south of Graz in Styria. It was constructed from 2009 until 2011 by VERBUND Thermal Power GmbH & Co KG.

* Source: ENTSO-E Production 2017

The highly efficient thermal power plant has been in operation since 2012. The thermal power plant is noted for its low specific emissions (360 t CO2/GWh) and is primarily used when the weather prevents the use of wind power plants and photovoltaic systems. Two machine sets, each consisting of a gas turbine and a downstream steam boiler with steam turbine, generate 832 MW of electrical energy. This delivers an overall efficiency of 59%. In addition, up to 400 MW of district heating can be supplied to the city of Graz via district heating extraction.  
 
The power plant consists of the machine and boiler house in one building block, a gas control station, switchgear and several buildings for the supply of cooling water (inlet structure, pump house, lines and cooling towers on the right bank of the Mur).

The power plant consists of two lines, machine sets. Line 1 has an output of 421 MW and line 2 an output of 417 MW.

The gas supply of CCGT Mellach is guaranteed via the "Südschiene" (gas pipeline), while the generated electrical energy is transported away via the Styria line.