Question

A steam power plant running on Rankine cycle has steam entering HP turbine at 20 MPa,
500ºC and leaving LP turbine at 90% dryness. Considering condenser pressure of 0.005 MPa
and reheating occurring upto the temperature of 500ºC determine,
(a) the pressure at wich steam leaves HP turbine
(b) the thermal efficiency

Answer 1

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can't understand