Alstom successfully completes retrofit at Dunamenti gas-fired power plant in Hungary

Source: Alstom 

Steam Turbine Retrofit turbine assembly copyright © 2010 Alstom Alstom’s Thermal Services unit in Hungary has successfully completed modernisation of unit 8 of the Dunamenti gas-fired power plant owned by Gaz de France Suez. The modernisation project awarded to Alstom in 2008 included the retrofit and upgrade of the complete steam turbine island and the associated balance of plant at unit 8 of the facility to match the new steam data following the installation of a gas turbine from another vendor. The project started in April 2009 and has been successfully completed with the commissioning of the retrofitted unit 8 in July of this year. It has contributed to the increased output of unit 8 from 215 MW to above 400 MW and the jump in efficiency by more than 20 percent - from 36 percent to 57 percent. The efficiency increase also results in a substantial reduction of CO2 emissions from the plant.

This project was a brown field investment, whereby the steam turbine island unit no 8 was modernised by using the power plant’s existing infrastructure. The six conventional type 215 MW steam turbines at the plant including the related condensers and feedwater heaters were originally supplied by Alstom companies. Within the scope of this project, Alstom replaced the high-pressure steam turbine in unit 8 with a high performance new module and upgraded the medium and low-pressure cylinders, the generator and the balance of plant – thus enabling the turbo group and its auxiliaries to operate in a highly efficient combined cycle mode.

László Deák, Country President of Alstom Hungary said, “Alstom is proud to have been a part of the rehabilitation of Hungary’s biggest power plant. Repowering is a special engineering application that requires significant engineering capabilities to synchronise the existing equipments with the new ones. Alstom has significant experience in the field that has allowed us to complete this project timely and contribute to the increase in output and efficiency. This upgrade will be a key example of the services we can provide to upgrade the power generation fleet in Hungary.”

Dunamenti is located near Budapest and is one of the country’s biggest power plants with 6 x 215 MW steam turbine units and two other combined cycle and cogeneration units. The plant has a total capacity of 1736 MW. The retrofit of unit 8 labelled ‘G3’ was part of a bigger rehabilitation programme undertaken by Gaz de France Suez to reduce the environmental impacts of their plant



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