Question
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a steam turbine has an inlet flow of 3 kg/s water at 3.5 MPa and 450°C...
a
steam turbine has an inlet flow of 3 kg/s water at 3.5 MPa and
450°C with a velocity of 140 m/s. The exit is at 800 KPa and 300°C
and very low velocity.
(a) How much heat (in MW) is assumed to be transferred into
the turbine?
(b) what is the work that goes into the turbine?
(c) find the work produced by the turbine?
(d) Find the entropy generation of the process.
(e) find the carnot efficiency of the turbine.
Solutions
Amanda K answered 5 months agoRelated Solutions
4. A steam turbine has an inlet flow of 3 kg/s at 3.5 MPa and 450...
4. A steam turbine has an inlet flow of 3 kg/s at 3.5 MPa and
450 C with a velocity of 140 m/s. the exit of the turbine is 800
kPa and 300 C at a very low velocity. Calculate a.) the work
produced in (MW) by the turbine, and b.) The entropy generated in
(kW/k)
A steam turbine operates with steam at inlet conditions of 3.5 MPa and 3500 C. The...
A steam turbine operates with steam at inlet conditions of 3.5
MPa and 3500 C. The exit stream leave the turbine is at 0.8 MPa and
is known to contain a mixture of saturated vapor and liquid. The
steam rate through the turbine is 1000 kg/h. A (negligible)
fraction of exit stream is bled through a throttle valve to 0.10
MPa and is found to be 1250 C. The measured output of the turbine
is 100 kW.
a) Determine the...
A steam turbine receives steam from two boilers. One flow is 5 kg/s at 3 MPa,...
A steam turbine receives steam from two boilers.
One flow is 5 kg/s at 3 MPa, 700°C and the other flow is 15 kg/s
at 800 kPa, 500°C.
The exit state is 10 kPa, with a quality of 96%.
Calculate the efficiency of the turbine and the total
power output.
A steam turbine receives steam from two boilers. One flow is 5 kg/s at 3 MPa,...
A steam turbine receives steam from two boilers. One flow is 5
kg/s at 3 MPa, 700°C and the other flow is 15 kg/s at 800 kPa,
500°C. The exit state is 10 kPa, with a quality of 96%. Find the
total power out of the adiabatic turbine. Calculate the efficiency
of the turbine
A steam turbine receives superheated steam at 18.0 kg/s, 500.°C, and 3.00 MPa and exhausts it...
A steam turbine receives superheated steam at 18.0
kg/s, 500.°C, and 3.00 MPa and exhausts it to 10 kPa with a quality
of 96%. If the turbine is assumed to be internally reversible,
determine the rate of heat loss from the turbine surface if the
power output is 20.MW The surface temperature of the turbine is
uniform at 350.°C, and the local environment (ground state) is
taken to be saturated liquid water at T0 = 20.0°C. Neglect all flow
stream...
Steam undergoes a state change from 450°C and 3.5 MPa to 150°C and 0.3 MPa. Determine...
Steam undergoes a state change from 450°C and 3.5 MPa to 150°C
and 0.3 MPa.
Determine ΔH and ΔS using the
following:
a. Steam table data
b. Ideal gas assumptions (be sure to
use the ideal gas heat capacity for water).
(ANS: 0.0717 kJ/kg-K;
-576.8 kJ/kg; 0.143 kJ/kg-K; -555.71 kJ/kg)
Consider now a turbine that operates with steam with T1 = 450◦C and P1= 8.0 MPa...
Consider now a turbine that operates with steam with T1 = 450◦C
and P1= 8.0 MPa and P2 = 30 kPa. The efficiency is 80% and the mass
flow rate is 80 kg/s. You may assume the velocities are zero. You
may also assume q=0.
What is the exhaust temperature and quality (if saturated) for
100% efficiency?
An adiabatic steam turbine receives 50 kg/s of superheated steam at 5 MPa and 500oC. Steam...
An adiabatic steam turbine receives 50 kg/s of superheated steam
at 5 MPa and 500oC. Steam exits the turbine with a pressure of 100
kPa. Determine the minimum exit quality and the maximum power
output of the turbine in kW.
Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 4 MPa,...
Steam flows steadily through an adiabatic turbine. The inlet
conditions of the steam are 4
MPa, 500°C and 80 m/s, and the exit conditions are 30 kPa, 92%
quality and 50 m/s. The
mass flowrate of the steam is 12 kg/s. Investigate the effect of
the turbine exit pressure on
the power output of the turbine. Let the exit pressure vary from 10
to 200 kPa. Plot (1) T2
vs P2 and 2) Plot the power output (W_dot_T in MW)...
Steam enters a turbine at a velocity of 200 m/s. The inlet conditions of the steam...
Steam enters a turbine at a velocity of 200 m/s. The inlet
conditions of the steam are at 4000 kPA and 500°C. The diameter of
the inlet pipe is 50 mm. The outlet conditions of the steam are 80
kPa and a quality of 1.0. The diameter of the outlet pipe is 250
mm. Determine the turbine power output in kJ/s assuming the kinetic
energy change and potential energy change are both negligible.
Calculate the change in kinetic energy to...
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