**Task 1.**For definied steam parameters in the turbine exchaust (Pк, Xк), having condition of the constant pressure, you should find conjugate meaning parameters of the fresh steam and steam behind intermediate superheating using variation calculation by criterion of minimum specific fuel rate netto and electric power.

**Task 2.**For definied temperature of the fresh steam and intermediate superheating, you should find the value of ultimate ratio of steam dryness, while netto efficiency of the power generating unit has maximum. Minimum acceptable the value of ultimate ratio of steam dryness is 0.92.

**Task 3.**In which parameters of the fresh steam, the efficiency of the power generating unit will have maximum. Minimum acceptable the value of ultimate ratio of steam dryness is 0.92.