The contract for the conversion of the Ptolemaida V power plant from a lignite-fired facility to a natural gas unit, with a budget of 420 million euros, has been awarded by PPC to Terna, a subsidiary of the GEK Terna Group.
According to the relevant Environmental Impact Assessment, the project will be implemented in two phases. During the first phase, the plant will be converted into an open cycle gas turbine (OCGT) unit, through the installation of a gas turbine (GT) with a gross nominal capacity of 294.95 MWe and a gross efficiency of 39.77% under local reference conditions. In open cycle operation, the unit will deliver a net capacity of 292.95 MWe, with a net efficiency of 39.5%.
In the second phase, the conversion into a combined cycle gas turbine (CCGT) unit will be completed, with the installation of a heat recovery steam generator (HRSG), which will be connected to the gas turbine exhaust stack at its base. The generated steam will feed a steam turbine (ST) with a nominal capacity of 144.05 MWe, to be installed nearby within the turbine hall.
Under combined cycle operation, the plant will have a gross nominal capacity of 438.60 MWe and a gross efficiency of 59.60%, while net capacity will reach 430 MWe, with an estimated net efficiency of 58.44% under local reference conditions. The timeline foresees the commencement of first-phase works in the coming August, with the unit entering trial operation in October 2027 and commercial operation following in December of the same year. As for the second phase, works are scheduled to begin in January 2028 and be completed by December 2029.
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