Assume that the turbine operates adiabatically.

The inlet pressure and temperature of a steam entering a turbine operating at a steady state with an isentropic efficiency of 90%, is 4 MPa and 640°C respectively. At the outlet the pressure drops to 0.04 MPa. If the net work done by the turbine is 375 kW, find out:

(1) the quality of the steam at the turbine exit,

(2) the mass flow rate

(3) the entropy production rate

(4) draw the T–s diagram indicating the states

Answer rating: 100% (QA)

Given data P 1 4 MPa T 1 640C P 2 004 MPa isentropic 90 W net 375 kW To determine Steams quality at ... View the full answer