Question

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 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...

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

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...

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...

Use cold-air-standard analysis with the fluid modeled as an
ideal gas with R=0.287 kJ/kg-K and constant k=1.4. Neglect changes
in kinetic and potential energy. Consider a SSSF of air at 300 K
and 100 kPa entering the compressor of a Simple Brayton Cycle Gas
Turbine powerplant. The cycle pressure ratio is 40 and maximum
cycle temperature is 1800 K. For compressor isentropic efficiency
of 82% the compressor work input per unit mass = __ kJ/kg (enter
the nearest positive integer...

A steam turbine has inlet steam pressure p1 = 1.4 MPa
absolute. Inlet steam temperature is T1 = 400
oC. This corresponds to inlet enthalpy per unit mass of
h1 = 3121 kJ/kg. Exit pressure of the steam is p2 = 101
kPa absolute. Exit steam temperature is T2 = 100
oC. This corresponds to exit enthalpy per unit mass of
h2 = 2676 kJ/kg. Inlet speed of the steam is
V1 = 15 m/s and exit speed is V2...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 5 minutes ago

asked 8 minutes ago

asked 8 minutes ago

asked 9 minutes ago

asked 11 minutes ago

asked 12 minutes ago

asked 13 minutes ago

asked 16 minutes ago

asked 16 minutes ago

asked 19 minutes ago

asked 20 minutes ago

asked 20 minutes ago