Solved: Consider a cogeneration power plant modified with
Chapter 10, Problem 128P
(choose chapter or problem)
10-128 Consider a cogeneration power plant modified with regeneration. Steam enters the turbine at 
and 
at a rate of 
and expands to a pressure of 
. At this pressure, 60 percent of the steam is extracted from the turbine, and the remainder expands to a pressure of 
. Part of the extracted steam is used to heat 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 . It is subsequently mixed with the feedwater leaving the feedwater heater, and the mixture is pumped to the boiler pressure. The steam in the condenser is cooled and condensed by the cooling water from a nearby river, which enters the adiabatic condenser at a rate of 
The total power output of the turbine is
(a) 
(b) 
(c) 
(d) 
(e) 
The temperature rise of the cooling water from the river in the condenser is
(a) 
(b) 
(c) 
(d) 
(e) 
The mass flow rate of steam through the process heater is
(a) 
(b) 
(c) 
(d) 
(e) 
The rate of heat supply from the process heater per unit mass of steam passing through it is
(a) 
(b) 
(c) 
(d) 
(e) 
The rate of heat transfer to the steam in the boiler is
(a) 
(b) 
(c) 
(d) 
(e) 
