A compressor compresses air flowing at 15 litre/s, 150 kPa, 20°C
at the inlet to 500...
A compressor compresses air flowing at 15 litre/s, 150 kPa, 20°C
at the inlet to 500 kPa, 250°C at the outlet. During the
compression, heat is lost at the rate of 1.5 kW. Determine the
minimum input work for the compressor.
3) Air enters a compressor at 2 m / s, 20 ° C and 100 kPa
pressure, exits at 50 m / s, 900 kPa pressure and 200 ° C. Make
sure that the power consumed by the compressor is 500 kW. The
outlet cross-section diameter of the compressor is 10 cm. (Neglect
the change in potential energy.) (15 points)
CALCULATE THE AMOUNT OF HEAT?
An adiabatic air compressor with inlet conditions of 100 kPa, 27
C and an exit pressure of 500 kPa has an inlet volume flow rate of
5 m3/s and operates in steady flow. Calculate the minimum power
required to drive the compressor.
A frictionless air compressor operates between 200 kPa and 6
MPa. The inlet is at 25°C. Compared to operating adiabatically,
what is the energy-input (e.g. power) savings by cooling it with a
polytropic exponent of 1.16? Answer in kJ/kg (i.e. kJ of energy
saved for every kg of air compressed).
Correct answer is 9.23 kJ/kg; please show steps and thank
you!
Water is flowing in a compressor steadily at 20 kPa and 40 oC to
1.7 MPa and 500 oC. The power input to the compressor is determined
to be 5 MW. The water enters the compressor at a height of 5 m and
leaves at 10 m of height. The velocities of the water coming in and
out of the compressor are 50 m/s and 180 m/s respectively. a)
Determine the work input per unit mass for the water flowing...
9.43 An ideal air-standard
state with compressor inlet conditions of 300 K and 100 kPa and a
fixed turbine inlet temperature of 1700 K. For the cycle,
Plot the net work developed per unit mass flowing, in kJ/kg, and
the thermal efficiency, each versus compressor pressure ratio
ranging from 2 to 50.
I need the IT Thermodynamics software code, or at least
I need to know how to set the code up. Also, please note that this
is an air-standard...
A compressor receives 0.1 kg/s R-134a at 150 kPa, -10 degrees C
and delivers it at 1000 kPa, 40oC. The power input is measured to
be 3 kW. The compressor has heat transfer to air at 100 kPa coming
in at 20 degrees C and leaving at 25 degrees C.
I'm trying to find the mass flow rate of air, BUT can you please
just show me the energy balance and Schematic to set this up.
JUST the energy balance...
Air enters an adiabatic compressor at 100 kPa (absolute) and 20
ºC at a rate of 0.075 m3 /s, and it exits at a pressure of 900 kPa
(absolute). The compressor has an isentropic efficiency of 70
percent. Neglecting the changes in kinetic and potential energies,
determine (a) the exit temperature of air and (b) the power
required to drive the compressor.
An air compressor operating in adiabatic steady flow takes in
air at 17 C, 200 kPa and discharges is at 1300 kPa. Calculate the
minimum work required to drive the compressor assuming the
compressor has
i) constant specific heats.
ii) non-constant specific heats.
Air enters the compressor of an ideal gas refrigeration cycle at
17°C and 35 kPa and the turbine at 47°C and 160 kPa. The mass flow
rate of air through the cycle is 0.3 kg/s. Assume variable specific
heats for air.
Determine the net power input.
The net power input is kW.
Air enters the compressor at 100 kPa, 300 K and is compressed to
1000 kPa. The temperature at the inlet to the first turbine stage
is 1400 K. The expansion takes place isentropically in two stages,
with reheat to 1400 K between the stages at a constant pressure of
300 kPa. A regenerator having an effectiveness of 100% is also
incorporated into the cycle. The turbine and the compressor each
have am isentropic efficiency of 80%. Determine the following:
(a.)...