Air, initially at 300 K and 100 kPa, is compressed adiabatically in a steady flow compressor...
Air, initially at 300 K and 100 kPa, is compressed adiabatically in a steady flow compressor to 600 K and 500 kPa.
a) Perform the necessary calculations to show that the process is irreversible
b) Compare the change in energy carried by the air due to the process. Briefly comment.
c)How would the comparison in part (b) look like if the process were reversible? TO answer this question, you can either use equations or briefly explain.
d) Calculate the isentropic efficiency of the compressor.
Homework Answers
Add Answer to:
Air, initially at 300 K and 100 kPa, is compressed adiabatically
in a steady flow compressor...
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and...
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. Determine the compressor work per unit mass for (a) isentropic compression with k 1.4, (b) a compressor with 85% isentropic efficiency, (c) two-stage compression (100 kPa to 300 kPa, and 300 kPa to 900 kPa) with intercooling with an isentropic efficiency of 85% for both compressors. (50 points) 2.
Air is compressed steadily by a reversible compressor from 100 kPa and 300 K to 900...
Air is compressed steadily by a reversible compressor from 100
kPa and 300 K to 900 kPa by a 10-kW motor. Assume air is both ideal
and has constant specific heat capacity values determined at room
temperature from Table A-2 at room temperature (300 K).
a) Determine the mass flow rate through the compressor if the
process is isentropic. ( find and identify the work per unit
mass)
b) polytropic with n = 1.2
c) isothermal
d) ideal two-stage polytropic...
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and...
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming variable specific heats and neglecting the changes in kinetic and potential energies, determine (a) the isentropic efficiency of the compressor and (b) the exit temperature of air if the process were reversible. b) Texit
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and...
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. if the volume flow rate = 1 m/sec Determine: the compressor power (kW) for isentropic compression with k = 1.4 Choose... the compressor power (kW) for polytropic compression with n = 1.3 Choose.. the compressor power (kW) for ideal two stage compression with intercooling with a polytropic exponent of 1.3 Choose... the compressor power (kW)...
Air is compressed by an adiabatic compressor from P2=100 kPa to P2=500 kPa. T2=380 K and...
Air is compressed by an adiabatic compressor from P2=100 kPa to P2=500 kPa. T2=380 K and T2=650 K. Air is an ideal gas with variable specific heats. Determine a) The exit temperature of the air for the isentropic case. Each of the above temperatures and pressures are given as actual. b) The efficiency of the compressor.
Air is compressed steadily and adiabatically from 17 C and 97 kPa to 276 C and...
Air is compressed steadily and adiabatically from 17 C and 97 kPa to 276 C and 604 kPa. Assuming constant specific heats for air at room temperature, what is the isentropic efficiency of the compressor?
Humid air at 101 kPa, 25°C, 90% relative humidity is compressed in a steady-flow, isentropic compressor...
Humid air at 101 kPa, 25°C, 90% relative humidity is compressed in a steady-flow, isentropic compressor to 800 kPa. (a) What is specific humidity of the air? (b) What is the relative humidity of the air exiting the compressor? (c) What is the change in enthalpy of the dry air during this process? (d) What is the change in enthalpy of the water vapor, per unit dry air, during this process? Express your answer in kilojoules per kilogram of dry...
The centrifugal compressor shown here compresses air from 100 kPa, 27 °C to 600 kPa. This...
The centrifugal compressor shown here compresses air from 100 kPa, 27 °C to 600 kPa. This compressor has an isentropic efficiency of 85%. What is the air temperature at the compressor outlet and how much power does it require if the air volumetric flow rate is 9 m3/min at the compressor inlet? ideal has-hi 1 halt hasthi K- K TI OUT CH 300 =.599 Tas AR ENTERS f1technical.net .S99T25=100
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 100 kPa, 300...
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 100 kPa, 300 K, with a volume flow rate of 5 m3/s. The compressor pressure ratio is 8, and the turbine inlet temperature is 1400 K. The turbine and compressor each have isentropic efficiencies of 80% and the regenerator effectiveness is 80%. For the air, k = 1.4 and the ambient temperature is T0 = 300 K. -Determine the thermal efficiency of the cycle. -determine the back...
A compressor takes in air at 100 kPa and 300 K and outputs at a pressure...
A compressor takes in air at 100 kPa and 300 K and outputs at a pressure of 1100 kPa using 220 kJ/kg of energy. If the outlet temperature is 500 K and the steady-state wall temperature is maintained at 400 K, find the rate of entropy generation.
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. Determine the compressor work per unit mass for (a) isentropic compression with k 1.4, (b) a compressor with 85% isentropic efficiency, (c) two-stage compression (100 kPa to 300 kPa, and 300 kPa to 900 kPa) with intercooling with an isentropic efficiency of 85% for both compressors. (50 points) 2.
Air is compressed steadily by a reversible compressor from 100
kPa and 300 K to 900 kPa by a 10-kW motor. Assume air is both ideal
and has constant specific heat capacity values determined at room
temperature from Table A-2 at room temperature (300 K).
a) Determine the mass flow rate through the compressor if the
process is isentropic. ( find and identify the work per unit
mass)
b) polytropic with n = 1.2
c) isothermal
d) ideal two-stage polytropic...
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming variable specific heats and neglecting the changes in kinetic and potential energies, determine (a) the isentropic efficiency of the compressor and (b) the exit temperature of air if the process were reversible. b) Texit
Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. if the volume flow rate = 1 m/sec Determine: the compressor power (kW) for isentropic compression with k = 1.4 Choose... the compressor power (kW) for polytropic compression with n = 1.3 Choose.. the compressor power (kW) for ideal two stage compression with intercooling with a polytropic exponent of 1.3 Choose... the compressor power (kW)...
Air is compressed by an adiabatic compressor from P2=100 kPa to P2=500 kPa. T2=380 K and T2=650 K. Air is an ideal gas with variable specific heats. Determine a) The exit temperature of the air for the isentropic case. Each of the above temperatures and pressures are given as actual. b) The efficiency of the compressor.
The centrifugal compressor shown here compresses air from 100 kPa, 27 °C to 600 kPa. This compressor has an isentropic efficiency of 85%. What is the air temperature at the compressor outlet and how much power does it require if the air volumetric flow rate is 9 m3/min at the compressor inlet? ideal has-hi 1 halt hasthi K- K TI OUT CH 300 =.599 Tas AR ENTERS f1technical.net .S99T25=100
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago