(b) The temperature rise of the cooling water from the river in the condenser (c) The mass flow rate of steam through the process heater (d) The rate of heat supply from the process heater (e) The rate of heat transfer to the steam in the boiler
(b) The temperature rise of the cooling water from the river in the condenser (c) The mass flow rate of steam through the process heater (d) The rate of heat supply from the process heater (e) The rate of heat transfer to the steam in the boiler
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Q1) Consider a cogeneration power plant modified with regeneration. Steam enters the turbine at 6 MPa and
450 °C at a rate of 60 kg/s and expands to a pressure of 0.4 MPa. At this pressure, 20% of the steam is extracted
from the turbine, and the remainder expands to a pressure of 10 kPa. 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 0.4 MPa. 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 600 kg/s.
The enthalpies of all respective points of the system are given below.
6.
Turbine
hi = 191.81
hz = 192.20
hz = h4 = hạ = 604.66
hs = 610.73
he = 3302.9
h, = hg = h10 = 2665.6
h1=2128.8
%3D
Boiler
10
Process
heater
Condenser
PI
fwh H PI
Determine;
(a) The total power output of the turbine
(b) The temperature rise of the cooling water from the river in the condenser
(c) The mass flow rate of steam through the process heater
(d) The rate of heat supply from the process heater
(e) The rate of heat transfer to the steam in the boiler
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