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The condenser into which the steam from the LP turbine is discharged is a closed vessel fitted with tubes through which sea water is circulated by the main circulating pumps. The outside of the cold tubes condenses the steam from the turbine back into feed water.
The condenser is a single-pass surface type, with divided water-boxes to facilitate inspection and maintenance. The pressure in the condenser is 0.084 bar when the circulating water enters at a temperature of 33ºC.
The condensate and feed heating system includes seven heating stages; the heating medium is based on the steam extracted from the turbine.
Four surface-type LP heaters are provided for heating the condensate. The receive steam extracted from the LP section of the turbine. A direct-contact heater is provided to deaerate the feedwater and to be used as suction-tank for the feedwater pumps; this heater receives steam from the turbine IP section exhaust.
The boiler feed pump sets are provided to supply about half of the feedwater needed by the boiler at full load and each pump set has a constant speed motor and booster pump, a hyraulic speed changer with step-up gear and a variable speed high pressure main feed pump.
Two surface type HP heaters are provided for the heating of the feedwater. HP1 receives steam extracted from the IP section of the turbine whereas HP2 gets steam from the cold reheat line.


Mission and Values