Question
In: Mechanical Engineering
A regenerative gas-turbine power plant with two stages of compression and two stages of expansion operates...
A regenerative gas-turbine power plant with two stages of
compression and two stages of expansion operates on a Brayton cycle
with a pressure ratio across the two-stage compressor of 12. Air
enters the first stage of the compressor at 100 kPa and 300 K. At
the intercooler exit, the temperature is 300 K. In both turbine
stages, air enters at 1400 K. The total heat transfer rate to the
air in both combustors is 5,000 kW. The regenerator has an
efficiency of 70%, both compressor stages have an isentropic
efficiency of 75%, and both turbine stages have an isentropic
efficiency of 80%. The pressure in the intercooler and reheater is
600 kPa. Using an Air Standard Analysis, find the following
(a) Thermal Efficiency in Percentage
(b) net work output
(c) mass flow rate
(d) Intercooler/Reheater pressure that maximizes the cycle's
thermal efficiency
(e) Max Work output
Solutions
samet mamat answered 2 years agoRelated Solutions
For an ideal gas-turbine cycle with two stages of compression and two stages of expansion, the...
For an ideal gas-turbine cycle with two stages of compression
and two stages of expansion, the pressure ratio across each stage
of the compressor and turbine is 3. The air enters each stage of
the compressor at 300 K and each stage of the turbine at 1200K.
Using variable specific heats, determine the back work ratio and
the thermal efficiency of the cycle, assuming
(a)no regenerator is used,
(b)a regenerator with 75% effectiveness is used.
Consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. The...
Consider an ideal gas-turbine cycle with two stages of
compression and two stages of expansion. The pressure ratio across
each stage of the compressor and turbine is 3. The air enters each
stage of the compressor at 300 K and each stage of the turbine at
1200 K. Determine the back work ratio and the thermal efficiency of
the cycle, assuming (a) the expansion and compression processes to
be isentropic and no regenerator is used, (b) the expansion and
compression...
Consider an ideal gas turbine cycle with two stages of compression and two stages of expansion. The...
Consider an ideal gas turbine cycle with two stages of
compression and two stages of expansion. The pressure
ratio across each compressor stage and each turbine stage is 5 to
1. The pressure at the entrance to the first compresor is 100 kPa,
the temperature entering each compressor is 25°C (298 K), and the
temperature entering each turbine is 1100°C (1373 K). An ideal
regenerator is also incorporated into the cycle. For the
air involved, it may be assumed that Cp =...
Consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. The...
Consider an ideal gas-turbine cycle with two stages of
compression and two stages of expansion. The pressure ratio across
each stage of the compressor and turbine is 3. The air enters each
stage of the compressor at 300 K and each stage of the turbine at
1200 K. Use variable specific heats. Assuming an efficiency of 86
percent for each compressor stage and an efficiency of 90 percent
for each turbine stage.
(a) no regenerator is used
rbw=rbw= % (Round...
An ideal gas-turbine cycle with two stages of compression and two stages of expansion. The overall...
An ideal gas-turbine cycle with two stages of
compression and two stages of expansion. The overall pressure ratio
is 9. The air enters each stage of the compressor at 300 K and each
stage of the turbine at 1200 K. assuming an efficiency of 86
percent for each compressor stage and an efficiency of 90 percent
for each turbine stage. Draw the T-S diagram and determine the back
work ratio and the thermal efficiency of the cycle, assuming
(a) no...
A gas turbine operates with two stages of compression with an intercooler between the stages. Air...
A
gas turbine operates with two stages of compression with an
intercooler between the stages. Air enters the first stage at 100
kPa and 300 K. The pressure ratio across each compressor stage is 5
to 1 and each stage has an isentropic efficiency of 85%. Air exits
the intercooler at 330 K. The maximum cycle temperature is 1500 K
and the cycle has a single turbine stage that works isentropically.
Calculate the mass flow rate of the air if...
A gas turbine operates with two stages of compression with an intercooler between the stages. Air...
A
gas turbine operates with two stages of compression with an
intercooler between the stages. Air enters the first stage at 100
kPa and 300 K. The pressure ratio across each compressor stage is 5
to 1 and each stage has an isentropic efficiency of 85%. Air exits
the intercooler at 330 K. The maximum cycle temperature is 1500 K
and the cycle has a single turbine stage that works isentropically.
Calculate the exit temperature of each compressor stage and...
b) A 15 MW gas turbine plant operates with a two-stage compression and a two-stage expansion....
b) A 15 MW gas turbine plant operates with a two-stage
compression and a two-stage
expansion. The high-pressure turbine (HPT) drives both
low-pressure compressor
(LPC) and high-pressure compressor (HPC). A low-pressure turbine
(LPT) is connected
to a generator for electricity generation The overall pressure
ratio is 16/1 and the
maximum cycle temperature, which is at the inlet of the HPT, is
900°C. The gases
leaving the HPT are reheated to 850°C before entering the LPT.
Both compressors have
equal pressure...
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...
In a gas turbine with two-stage compression and expansion, the total pressure ratio is 12. Air...
In a gas turbine with two-stage compression and expansion, the
total pressure ratio is 12. Air enters the compressor at a
temperature of 320 K and the turbine at a temperature of 1320 K.
The isanthropic efficiency of the compressors is 75%, the
efficiency of the turbines is 87% and the regenerator is 78%.
Considering the change of specific temperatures with
temperature;
a) back work rate,
b) calculate the thermal efficiency of the cycle.
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