Question
In: Mechanical Engineering
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam...
A power plant operates on a regenerative vapor power cycle with
one open feedwater heater. Steam enters the first turbine stage at
12 MPa, 560°C and expands to 1 MPa, where some of the steam is
extracted and diverted to the open feedwater heater operating at 1
MPa. The remaining steam expands through the second turbine stage
to the condenser pressure of 50 kPa. Saturated liquid exits the
open feedwater heater at 1 MPa. The net power output for the cycle
is 330 MW. Assume that both turbine stages and both pumps have an
isentropic efficiency of 90%.
Determine:
(a) the percent cycle thermal efficiency.
(b) the mass flow rate into the first turbine stage, in kg/s.
(c) the rate of entropy production in the open feedwater heater, in
kW/K.
Solutions
samet mamat answered 1 year agoRelated Solutions
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam...
A power plant operates on a regenerative vapor power cycle with
one open feedwater heater. Steam enters the first turbine stagge at
12 MPa, 560*C and expands to 1 MPa, where some of the steam is
extracted and diverted to the open feedwater heater operating at 1
MPa. The remaining steam expands through the second turbine stage
to the condenser pressure of 6 kPa. Saturated liquid exits the open
feedwater heater at 1 MPa. The net power output for the...
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam...
A power plant operates on a regenerative vapor power cycle with
one open feedwater heater. Steam enters the first
turbine stage at 12 MPa, 520◦C and expands to 1 MPa, where some of
the steam is extracted and diverted to the open
feedwater heater at 1 MPa. The remaining steam expands through the
second turbine stage to the condenser pressure of
6 kPa. Saturated liquid exits the open feedwater heater at 1 MPa.
For isentropic processes in the turbines and...
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam...
A power plant operates on a regenerative vapor power cycle with
one open feedwater heater. Steam enters the first turbine stage at
12 MPa, 560°C and expands to 1 MPa, where some of the steam is
extracted and diverted to the open feedwater heater operating at 1
MPa. The remaining steam expands through the second turbine stage
to the condenser pressure of 28 kPa. Saturated liquid exits the
open feedwater heater at 1 MPa. The net power output for the...
A steam power plant operates on a regenerative Rankine cycle with two feedwater heaters, one closed...
A steam power plant operates on a regenerative Rankine
cycle with two feedwater heaters, one closed and one open. Steam
enters the turbine at 12.5 MPa and 550ºC and exhausts to the
condenser at 10 kPa. Steam is extracted from the turbine at 1 MPa
for the closed feedwater heater and 0.8 MPa for the open one. The
feedwater is heated to the condensation temperature of the
extracted steam in the closed feedwater heater. The extracted steam
leaves the closed...
4. Consider a reheat–regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and...
4. Consider a reheat–regenerative vapor power cycle with two
feedwater heaters, a closed feedwater heater and an open feedwater
heater. Steam enters the first turbine at 12.0 MPa, 520C and
expands to 0.6 MPa. The steam is reheated to 440C before entering
the second turbine, where it expands to the condenser pressure of
0.006 MPa. Steam is extracted from the first turbine at 2 MPa and
fed to the closed feedwater heater. Feedwater leaves the closed
heater at 200C and...
Consider a regenerative vapor power cycle with two feedwater heaters, a closed one and an open...
Consider a regenerative vapor power cycle with two feedwater
heaters, a closed one and an open one, and reheat. Steam enters the
first turbine stage at 12 MPa, 560 °C, and expands to 1.5 MPa. Some
steam is extracted at 1.5 MPa and fed to the closed feedwater
heater. The remainder is reheated at 1.5 MPa to 440 °C and then
expands through the second-stage turbine to 0.3 MPa, where an
additional amount is extracted and fed into the open...
Consider a regenerative vapor power cycle with two feedwater heaters, a closed one and an open...
Consider a regenerative vapor power cycle with two feedwater
heaters, a closed one and an open one, and reheat. Steam enters the
first turbine stage at 12 MPa, 480°C, and expands to 2 MPa. Some
steam is extracted at 2 MPa and fed to the closed feedwater heater.
The remainder is reheated at 2 MPa to 440°C and then expands
through the second-stage turbine to 0.3 MPa, where an additional
amount is extracted and fed into the open feedwater heater...
A steam power plant operates on a regenerative Rankine cycle. Steam enters the turbine at 6...
A steam power plant operates on a regenerative Rankine cycle.
Steam enters the turbine at 6 MPa at 700 ºC and the condenser at 10
kPa. Turbine has isentropic efficiency of 85% and pumps have
isentropic efficiency of 90%. Steam is extracted from the turbine
at 0.6 MPa to heat the feedwater in an open feedwater heater. Water
leaves the open feedwater heater as saturated liquid.
a) Draw the system with labels and show the ideal and the
non-ideal cycle...
A steam power plant operates on an ideal regenerative Rankine cycle. Steam enters the turbine at...
A steam power plant operates on an ideal regenerative Rankine
cycle. Steam enters the turbine at 6 MPa and 450oC and is condensed
in the condenser at 20 kPa. Steam is extracted from the turbine at
0.4 MPa to heat the feedwater in an open feedwater heater. Water
leaves the feedwater heater as a saturated liquid. Show the cycle
on a T-s diagram and determine the fraction of steam extracted from
the turbine for the open feedwater heater.
Consider a steam power plant that operates on a regenerative Rankine cycle and has a net...
Consider a steam power plant that operates on a regenerative
Rankine cycle and has a net power output of 150 MW. Steam enters
the turbine at 10 MPa and 500°C and the condenser at 10 kPa. The
isentropic efficiency of the turbine is 80 percent, and that of the
pumps is 95 percent. Steam is extracted from the turbine at 0.5 MPa
to heat the feedwater in an open feedwater heater. Water leaves the
feedwater heater as a saturated liquid....
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