Air enters a steady flow adiabatic turbine at 1600 K and exhausts to atmosphere at 1000 K, Patm = 1 bar. If the second law efficiency is 85%, what is the turbine inlet pressure? What is irreversibility during expansion process? Given, surrounding temperature is 250C.
Properties of air
|
T1 [K]
|
h1 [kJ/kg]
|
S1 [kJ/kg-K]
|
|
1000
|
1046
|
8.6905
|
|
1600
|
1757
|
8.1349
|