Question

Steam flows steadily through an adiabatic turbine. The inlet
conditions are: 20 MPa, 500°C, 90 m/s and the exit conditions are
20 kPa, 95% quality, and 60 m/s. The mass flow rate of the steam is
15 kg/s. Find:

a) The change in kinetic energy of the steam, (5 points)

b) The power output, and (5 points)

c) The turbine inlet area. (5 points)

Answer #1

P2) Steam flows steadily through an adiabatic turbine in a power
plant. The inlet conditions of the steam are 6 MPa, 400 °C and 119
cm2 . The exit conditions are 40 kPa, 92 percent quality, 50 m/s
and 20 kg/s. Determine the power output.

Air flows steadily through an adiabatic turbine, entering at 1.4
MPa, 600°C, and 178 m/s and leaving at 150 kPa, 200°C, and 210 m/s.
The inlet of the turbine is 105 cm2 . Assume that air is an ideal
gas with constant specific heat. Given CP = 1.013 kJ/kgK. Estimate:
i) the mass flow rate of the air ii) the power output of
the turbine, in kW

Question 5 Steam enters an adiabatic turbine at 10 MPa and 500°C
and leaves at 10 kPa with a quality of 90 percent. Neglecting the
changes in kinetic and potential energies, determine the mass flow
rate required for a power output of 5 MW

Consider an adiabatic turbine. At steady mass flow rate of 10
kg/s, steam enter the turbine at 4.5 MPa, 600°c and 85 m/s and
leaves the turbine at 40 kPa, quality of 0.8 and 50 m/s. Determine
:
a) the power output
b) the turbine inlet area

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%.
The actual power output is 22MW.
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 steam turbine has an inlet of 3 kg/s water at 1.2 MPa, 500°C
with velocity of 16 m/s. The exit is at 150 kPa, 250°C and very low
velocity. Find the power produced and the rate of entropy
generation.

Steam enters an adiabatic turbine at 5 Mpa 500 oC
with a mass flow rate of 2 kg/s and leaves at 100 kpa. The
isentropic efficiency of the turbine is 90%. Find (12
points)
(a) Actual work output of the turbine _______________ (7
points)
b) Maximum work output of the turbine_______________(3
points)
(c) Entropy change during this process
__________________________(2 points)

Steam goes through an adiabatic turbine at 2kg/s. The power
created by the turbine is 1523.5 kW.Determine the isentropic
efficiency of the turbine.
Entrance conditions: 3 MPa and 400°C
Exit conditions: 30 kPa

Steam enters an adiabatic turbine at 7 MPa, 700 °C and
80 m/s and leaves at 50 kPa, 150 °C, and 140 m/s. If the power
output of the turbine is 6 MW, determine:
i) Mass
flowrate of the steam flowing through the
turbine.
ii) The
isentropic efficiency of the turbine.

Steam enters an adiabatic turbine at 1 MPa and 400 °C and leaves
at 150 kPa with a quality of 80 percent. Neglecting the changes in
kinetic and potential energies, determine the mass flow rate
required for a power output of 10 MW

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