Question

Steam enters an adiabatic turbine at 5 MPa and 700°C at a rate of 18.6 kg/s. The steam leaves the turbine at 50 kPa and 200°C. What is the rate of work produced by the turbine in MW? What is the rate of change of entropy of the steam during this process in kW/K? If the turbine is reversible and adiabatic and the steam leaves at 50 kPa, what is the rate of work produced by this turbine in MW? Ans: 19.02 MW, 12.01 kW/K, 23.87 MW

Answer #1

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 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 flows through a turbine at a rate of 30 kg/s. It enters
the turbine at 600 degrees C and 4 MPa and leaves at 300 degrees C
and 600 kPa.
(a). If the turbine is operated adiabatically, what is the power
produced by the turbine? (MW)
(b). It is discovered that this turbine only produces 15.444 MW
of power, what is rate of energy loss due to heat transfer?
(kW)
(c). Given the actual rate of work supplied by...

Steam enters an adiabatic turbine at 5 MPa , 800 C and leaves
at 50 kPa, 150 C. Determine the isentropic efficiency of the
turbine
73%
10%
100%
96%

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

Steam enters an adiabatic turbine at 140 bar and 560 C and
leaves at 10 kPa. At the exit, the pressure and quality are 50 KPa
and .90, respectively. Determine the power produced (kW) by the
turbine if the mass flow rate is 1.63 kg/s.

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

Argon gas enters an
adiabatic turbine at 800°C and 1.5 MPa at a rate of 80 kg/min and
exhausts at 200 kPa. If the power output of the turbine is 300 kW,
determine the isentropic efficiency of the turbine. Use the table
containing the ideal gas specific heats of various common
gases.
The isentropic
efficiency of the turbine is %.

NO INTERPOLATION REQUIRED
Air enters an adiabatic turbine at 1000 kPa and 1625 degrees C
(state 1) with a mass flow rate of 5 kg/s and leaves at 100 kPa the
isentropic efficiency of the turbine is 85%. Neglecting the kinetic
energy change of the steam, and considering variable specific
heats, determine:
a. the isentropic power of the turbine
Isentropic power in kW
b. the temperature at the turbine exit
temperature at exit in degrees C
c. the actual power...

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

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