Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 15 MPa, 600C, and the exit conditions are 25 kPa, 90 percent quality. The mass flow rate of the steam is 10 kg/s. Determine (a) the power output, (b) the temperature of the steam at the exit, and (c) the turbine inlet area Assumptions 1 This is a steady-flow process since there is no change with time. 2 Kinetic and potential energy changes are negligible. 3 The device is adiabatic and thus heat transfer is negligible P-15 MPa 7 = 600C Energy balance equation is: E IN - E Net energy transfer ow by heat, work, and mass m = pVA system (kJ) Change in internal, kinetic, potential, etc., energies STEAM -10 kg/s W P-25 kPa 1=0.9 EnEoat