Question
In: Mechanical Engineering
Air enters a compressor operating at steady state with a pressure of 14.7 lbf/in.2, a temperature...
Air enters a compressor operating at steady state with a pressure of 14.7 lbf/in.2, a temperature of 70°F, and a volumetric flow rate of 500 ft3/min. The air velocity in the exit pipe is 700 ft/s and the exit pressure is 133 lbf/in.2 If each unit mass of air passing from inlet to exit undergoes a process described by pv1.34 = constant, determine (a) the exit temperature, in °F, and (b) the diameter of the exit pipe, in inches.
Solutions
samet mamat answered 2 years agoRelated Solutions
An air compressor is operating at a steady state. The air enters at with a volumetric...
An air compressor is operating at a steady state. The air enters
at with a volumetric flow rate 1.2 m^3/s at 170 kPa and 22 degrees
celsius with negligible velocity and leaves at 1500 kPa with
velocity of 200 m/s. The power to the compressor is 60 kW and the
compressor is cooled at a rate of 15 kJ/kg. Determine the exit
area.
Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric...
Air enters a compressor operating at steady state at 1.05 bar,
300 K, with a volumetric flow rate of 48 m3/min and
exits at 12 bar, 400 K. Heat transfer occurs at a rate of 8 kW from
the compressor to its surroundings.
Assuming the ideal gas model for air and neglecting kinetic and
potential energy effects, determine the power input, in kW.
A compressor, operating at steady-state, increases the pressure of an air stream from 1 bar to...
A compressor, operating at steady-state, increases the pressure
of an air stream from 1 bar to 10 bar while losing 4.2 kW of heat
to the surroundings. At the compressor inlet, the air is at 25o C
and has a velocity of 14 m/s. At the compressor outlet, the air is
at 350o C and has a velocity of 2.4 m/s. If the compressor inlet
has a cross-sectional area of 500 cm2 and the air behaves as an
ideal gas,...
A compressor, operating at steady-state, increases the pressure of an air stream from 1 bar to...
A compressor, operating at steady-state, increases the pressure
of an air stream from 1 bar to 10 bar while losing 4.2 kW of heat
to the surroundings. At the compressor inlet, the air is at 25o C
and has a velocity of 14 m/s. At the compressor outlet, the air is
at 350o C and has a velocity of 2.4 m/s. If the compressor inlet
has a cross-sectional area of 500 cm2 and the air behaves as an
ideal gas,...
Refrigerant 134a at p1 = 30 lbf/in2, T1 = 40oF enters a compressor operating at steady...
Refrigerant 134a at p1 = 30
lbf/in2, T1 =
40oF enters a compressor operating at steady state with
a mass flow rate of 400 lb/h and exits as saturated vapor at
p2 = 160 lbf/in2. Heat
transfer occurs from the compressor to its surroundings, which are
at T0 = 40oF. Changes in kinetic and
potential energy can be ignored. The power input to the compressor
is 4 hp.
Determine the heat transfer rate for the compressor, in Btu/hr, and
the...
Air expands through a turbine operating at steady state. At the inlet, p1 = 150 lbf/in.2,...
Air expands through a turbine operating at steady state. At the
inlet, p1 = 150 lbf/in.2,
T1 = 1400°R, and at the exit,
p2 = 14.8 lbf/in.2,
T2 = 900°R. The mass flow rate of air entering
the turbine is 11 lb/s, and 65,000 Btu/h of energy is rejected by
heat transfer.
Neglecting kinetic and potential energy effects, determine the
power developed, in hp.
Air expands through a turbine operating at steady state. At the inlet, p1 = 150 lbf/in.2,...
Air expands through a turbine operating at steady state. At the
inlet, p1 = 150 lbf/in.2,
T1 = 1400°R, and at the exit,
p2 = 14.8 lbf/in.2,
T2 = 900°R. The mass flow rate of air entering
the turbine is 5 lb/s, and 65,000 Btu/h of energy is rejected by
heat transfer.
Neglecting kinetic and potential energy effects, determine the
power developed, in hp.
Water vapor at 800 lbf/in.2, 1000 F enters a turbine operating at steady state and expands...
Water vapor at 800 lbf/in.2, 1000 F enters a turbine operating at
steady state and expands adiabatically to 2 lbf/ in.2, developing
work at a rate of 490 Btu per lb of vapor flowing. Determine the
condition at the turbine exit: two- phase liquid–vapor or
superheated vapor? Also, evaluate the isentropic turbine
efficiency. Kinetic and potential energy effects are
negligible.
3.70 kg / min of air as ideal gas enters a steady state compressor that runs...
3.70 kg / min of air as ideal gas enters a steady state
compressor that runs adiabatically. Air enters P1 = 300 kPa and T1
= 440 K and exits at P2 = 500 kPa. If the isentropic efficiency of
the turbine is 0.876, what is the work, in kW?
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26oC with...
Refrigerant 134a enters an insulated compressor operating at
steady state as saturated vapor at -26oC with a
volumetric flow rate of 0.18 m3/s. Refrigerant exits at
8 bar, 70oC. Changes in kinetic and potential energy
from inlet to exit can be ignored.
Determine the volumetric flow rate at the exit, in m3/s,
and the compressor power, in kW.
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