Thermodynamics Mech3001 - Week 10 - Problem 3 (10.68)

10.68 Consider a cogeneration power plant modified with regeneration. Steam enters the turbine at 9 MPa and 400°C and expands to a pressure of 1.6 MPa. At this pressure, 35% of steam is extracted from the turbine and the remainder expands to 10 kPa. Part of the extracted steam is used to heat the feedwater in an open feedwater heater. The rest of the extracted steam is used for process heating and leaves the process heater as a saturated liquid at 1.6 MPa. It is subsequently mixed with the feedwater leaving the feedwater heater, and the mixture is pumped to the boiler pressure. Assuming the pumps and the turbines to be isentropic,
Show the process cycle on T-s diagram with respect to saturation lines.
Determine

a) the mass flow rate of steam through the boiler for a net power output of 25 MW

Answer: 29.1 kg/s

[EngineeringHack]

This is from the university material provided to the students. Some questions come from Yunus' thermodynamics book

[chuhanzhang]

what is the name of this material ? is that a book?