Question

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 output of the turbine

Actual power in kW

d. the rate of entropy generation in the turbine

Rate of entropy generation in kW/K

Answer #1

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 %.

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.

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

An air turbine with inlet conditions of 500 kPa, 327 C operates
in steady flow and has an actual power output of 70 kW. The
discharge pressure is 100 kPa and the turbine has an efficiency of
0.8 at these operating conditions. Consider specific heats
constant.
a) Calculate the actual mass flow rate at the turbine exit.
b) Calculate the actual turbine exit temperature.
c) Show the actual and ideal processes on a T-s and P-v
diagram.

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...

Helium gas enters an adiabatic nozzle at 35 psia and 820 degrees
R with an initial velocity of 10 ft/s. The helium leaves the nozzle
at 782 degrees R and 29 psia.
(a) What is the velocity of the helium at the nozzle's exit?
(ft/s)
(b) What is the isentropic efficiency of the nozzle? (%)
(c) What is the rate of entropy generation for this process?
(Btu/lbm R)

Carbon dioxide enters an adiabatic compressor at100 kPa and 300
K at a rate of 0.5 kg/s and exits at 600 kPa and 450 K. Neglecting
the kinetic energy changes, determine the isentropic efficiency of
the compressor. Assume constant specific heats.
please show all the work and how you got it please and thank
you

Steam at 6 MPA, 600°C, enters a well-insulated turbine operating
at steady state and exits at 0.1 bar. The isentropic efficiency of
the turbine is 94.7%. Assuming the kinetic and potential energy
effects to be negligible, determine:
(a) Work output, in kJ/kg,
(b) The temperature at the exit of the turbine, in °C, and
(c) The rate of entropy production within the turbine, in kJ/K
per kg of steam flowing through the turbine.
(All steps required – Given/Find/Schematic/Engineering
Model/Analysis)
THANK...

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