Page 47 - Enprode Engineering & Construction

The generated power at the terminals of the GTGs and STG was planned as 11,5 kV at 50 Hz.
Each generator was connected to the Bulgarian National Grid via three separate Step-up Power
Transformers at 220 kV voltages, and designed to meet all the requirements of the Bulgarian
National Grid Code. ENPRODE was mandated for Conceptual Engineering & Design of Mramor
CCPP project in December 2008. Conceptual Engineering & Design was successfully completed
in April 2009. Completed Project

MAIN TECHNICAL PARAMETERS

Overall Plant Data
Gross power output.................................................................................................................... 116 MW
Gross electrical efficiency................................................................................................................... 53%
Emissions:
Nox.......................................................................................................................................... 50 mg/Nm3
Fuel type.................................................................................................................................. Natural gas
Gas Turbine
Type................................................................................................... General Electric LM6000 PF Sprint
Site rating................................................................................................................................. 46949 kWe
Exhaust gas flow.......................................................................................................................... 474.8 t/h
Exhaust gas temperature............................................................................................................... 452°C
Heat Recovery Steam Generator
Type............................................................................................................... Vertical Drum – Type HRSG
Heat exchangers:
HP.......................................................................................... Mix Eco, Eco, Boiler, Superheater
LP................................................................................................... Mix Eco, Boiler, Superheater
Steam Turbine
Type.......................................................................................... Multl-Stage Condensing Steam Turbine
HP steam............................................................................................................................ 55 bar / 432°C
LP steam......................................................................................................................... 3.6 bar / 258.5°C
ST power output........................................................................................................................... 28 MWe
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