Superheated steam at 20 mpa, 560°c enters the turbine of a vapor power plant. the pressure at the exit of the turbine is 0.5 bar, and liquid leaves the condenser at 0.4 bar at 75°c. the pressure is increased to 20.1 mpa across the pump. the turbine and pump have isentropic efficiencies of 81 and 85%, respectively. cooling water enters the condenser at 20°c with a mass flow rate of 70.7 kg/s and exits the condenser at 38°c. for the cycle, determine a. the mass flow rate of steam, in kg/s. b. the thermal efficiency.

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj