282POWER PLANT SIMULATOR TRAINING INSTITUTEBakreswar Thermal Power Project : WBPDCL44STEAM POWER PLANT TURBINEA steam power plant continuously converts the energy stored in fossil fuels ( Coal, Oil or naturalgas ) or fissilefuel ( uranium, thorium ) into shaft work and ultimately into electricity. The workingfluid is water, whichsometimes in the form of liquid and sometimes in the state of vapour phaseduring its cycle of operation.Energy released by burning of fuel is transferred to water to generatesteam at high pressure & temperature,and then it expands in turbine to a low pressure to produceshaft work. The steam leaving the turbine iscondensed in a condenser. Thus it follows the cycle - LIMITATIONS OF HIGHER EFFICIENCY:To achieve higher eciency turbine inlet steam temperature should as high as possible andexhaust steamtemperature of LP turbine should be as low as possible. Considering themetallurgical limitations turbine inletsteam pressure & temperature should be around 130-150kg/cm2 & 5400C. LP turbine exhaust pressure &temperature depends upon quality of cooling water available atsite. However maximum wetness of LP turbineexhaust steam should be restricted to 12%.In Indiacapacity of Thermal Power Plants are ranging from 50 MW to 500 MW. Most of the Turbinesareeither Russian design LMW sets ( Leningrad Machine Works) or German design KWU sets (Kraft Werk