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Development of combined cycle plants

CCP Plant Marl 7, Germany

CCP Plant Marl 7

Technische Daten Referenzblatt

The Task

Evonik is replacing a further power plant in the Marl Chemical Park by a modern gas and steam turbine power plant. Hence, the modernisation of the Chemical Park is making further progress. The old power plant has so far been used as a reserve power plant and is now to make way for a modern and flexible gas and steam turbine power plant. Siemens Gas and Power GmbH & Co. KG is, as the general contractor, taking on the planning and construction of the CCGT plant. Standardkessel Baumgarte secured the order for the supply of the steam generator incl. the ancillary trades.

This third line supplements the two high-efficiency CCGT plants that are being constructed by Siemens jointly with Standardkessel Baumgarte in the Marl Chemical Park as a replacement for two coal-fired power plants.


The Solution

The third CCGT plant will, exactly like the first two plants, generate electricity and steam in the cogeneration process on the basis of natural gas and for that will utilise various residual gases from the chemical production processes at the Marl location. The heat recovery boiler is constructed in horizontal design and suspended in the boiler steelwork. The three burners of the auxiliary firing system are used for the supply of GT exhaust gases and for the additional use of natural gas, LPG, process gas and harbour gas as additional fuels and they are integrated into the boiler front wall.

The new power plant unit will be connected to the existing plants in such a way that, upon failure or standstill of individual power plants, an uninterrupted supply of gas to the chemical park is ensured.


For more information, please see our reference sheet.

"In order to meet the demands of a volatile energy market, we have made it our mission to realise our plants with maximum efficiency and high availability."

Sebastian Zimmer

Head of Proposals Energy Production

Technische Daten

Number of Lines


Energy Source

Natural Gas

GT-Exhaust Gas Flow

137.2 kg/s

GT-Exhaust Gas Temperature

569 °C

GT-Electrical Output

55 MW

ST-Electrical Output

37 MW

Combustion Thermal Output AF max.

181 MW

Steam Capacity

226 t/h

Steam Temperature

500 °C

Steam Pressure

80 bar

HRST Exhaust Gas Temperature

98 °C

Additional Fuel

Natural Gas, Production Residues (gaseous)

Boiler Type

Natural Circulation

Year of Commissioning


Discover more references from the area of combined cycle power plants. From partial components to complex complete plants and operation & maintenance solutions.
Further References

Ideas full of energy

Aerial view of Marl Chemical Park
Pipelines in the boiler house