Question

Find the specific reversible work for a steam turbine with inlet 4 MPa, 500°C and an actual exit state of 100 kPa, x = 1.0 with a 25°C ambient. 

Answer 1

Steam turbine 

T_o = 25°C = 298.15 K

Inlet state: 

h_i = 3445.2 kJ/kg

 s_i = 7.090 kJ/kg K

Exit state:

 h_e = 2675.5 kJ/kg;

s_e = 7.3593 kJ/kg K