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.
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.
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.)...
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 235 kW. Determine
the mass flow rate of air through the compressor. The inlet and
exit enthalpies of air are 298.2 kJ/kg and 628.07 kJ/kg.
The mass flow rate...
At the inlet of a steam turbine the following information are
given: p=1000 kPa, T=500 deg-C, u = 3124.3 kJ/kg, v = 0.35411, V=20
m/s, z=10 m, and mdot=10 kg/s.
determine the inlet area.
Determine the flow work at the inlet in MW
Determine the rate of transport of flow energy (Jdot).
If you neglect ke and pe in the expression for j, how would the
answer in part c change? in percentage