Question

Q#1 An adiabatic compressor receives air from the ambient at 95 kPa, 20°C, with a low velocity. At the compressor discharge, air exits at 1.52 MPa, 430°C. The power input to the compressor is 5000 kW. Determine the mass flow rate of air through the compressor.

Answer #1

Air enters the compressor of a gas-turbine plant at ambient
conditions of 100 kPa and 25°C with a low velocity and exits at 1
MPa and 347°C with a velocity of 90 m/s. The compressor is cooled
at a rate of 1500 kJ/min, and the power input to the compressor is
250 kW. Determine (a) temperature at the compressor exit
Investigate the effect of cooling rate from 1300 kJ/min to 1600
kJ/min in steps of 50 kJ/min on the mass...

air pressure of 103 kPa., entering the compressor at a
temperature of 15 degrees Celsius and a low speed. 1 mPa pressure,
336 degrees Celsius temperature and 106 m / s speed is coming out
of the compressor. The compressor is cooled by air at a temperature
of 15 degrees Celsius and 26 kW. The power input to the compressor
is 298 kW. (cp= 1.005kj/kgK , R=0.287 kj/kgK)
a) Find the mass flow of air
b) calculate the irreversibility in...

An adiabatic air compressor compresses 10.6 L/s of air at 120
kPa and 20°C to 1000 kPa and 300°C. The constant pressure specific
heat of air at the average temperature of 160°C = 433 K is
cP = 1.018 kJ/kg·K. The gas constant of air is
R = 0.287 kPa·m3/kg·K. Determine the work
required by the compressor

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...

Air at a pressure of 101 kPa and temperature of 288 K enters an
axial compressor stage with a velocity of 170 m/s. There are no
guide vanes, so the air enters in the axial direction only. When
traveling through the rotor, the air turns 15 degrees. This means
the angle of the relative velocity with respect to the axis is 15
degrees greater when entering the rotor than when it leaves. The
rotor spins at 8000 rpm and has...

An isentropic compressor that takes in air from the atmosphere
at 100 kPa and 300 K compresses it to 1 MPa. The compressor feeds
into a rigid tank that is initially filled with 5 kg of air at a
pressure of 500 kPa and a temperature of 500 K. Once the mass in
the tank reaches 8 kg, the compressor will stop to prevent the tank
from rupturing, which will occur if the pressure exceeds 1000
kPa.
a) Determine the...

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

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 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)

1. Air at a pressure of 101 kPa and temperature of 288 K enters
an axial compressor stage with a velocity of 170 m/s. There are no
guide vanes, so the air enters in the axial direction only. When
traveling through the rotor, the air turns 15 degrees. This means
the angle of the relative velocity with respect to the axis is 15
degrees greater when entering the rotor than when it leaves. The
rotor spins at 8000 rpm and...

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