Question

In: Mechanical Engineering

Air is compressed from an inlet condition of 100 kPa, 300 K to an exit pressure...

Air is compressed from an inlet condition of 100 kPa, 300 K to an exit pressure of 1000 kPa by an internally reversible compressor. Determine the compressor power per unit mass flow rate if the device is
(a) isentropic,
(b) polytropic with n =1.3,
(c) isothermal.

Solutions

Expert Solution

Summary:

Power required by device for different processes

Process Power (kW)
(a) isentropic 325.74
(b) Polytropic 303.87
(c) isothermal 230.25

samet mamat answered 2 hours ago
Next > < Previous

Related Solutions

Air enters the compressor at 100 kPa, 300 K and is compressed to 1000 kPa. The...
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.)...
An adiabatic air compressor with inlet conditions of 100 kPa, 27 C and an exit pressure...
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.
9.43 An ideal air-standard state with compressor inlet conditions of 300 K and 100 kPa and...
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...
Air is compressed from 100 Kpa and 22 C to an outlet pressure 8 times greater....
Air is compressed from 100 Kpa and 22 C to an outlet pressure 8 times greater. The compressor is not well insulated and loses heat at a rate of 120 kJ/kg. It is also note that there is a decrease in the entropy of the air of 0.4 kJ/kg-K between the inlet & the outlet. Assuming constant specific heats determine a) The outlet air temperature b) The required work input (kJ/kg) c) The entropy generation sgen (kJ/kg-K) during the compression...
Air of 0.5 kg mass is compressed in a piston-cylinder device from 300 K, 120 kPa...
Air of 0.5 kg mass is compressed in a piston-cylinder device from 300 K, 120 kPa to 500K, 940 kPa. (a) Determine the entropy change in kJ/K using (i) approximate analysis and (ii) exact analysis. (b) Determine the direction of heat transfer (into the device or out of the device).
One kg de air initially at 300 K and 100 kPa undergoes a quasi-equilibrium constant-pressure process...
One kg de air initially at 300 K and 100 kPa undergoes a quasi-equilibrium constant-pressure process in a piston-cylinder assembly. If the final temperature is 450 K, determine the work and heat interactions and the change in the enthalpy.
Air enters the compressor of an ideal air-standard Brayton cycle at 100 kPa, 300 K, with...
Air enters the compressor of an ideal air-standard Brayton cycle at 100 kPa, 300 K, with a volumetric flow rate of 5 m3/s. The turbine inlet temperature is 1800 K. For a compressor pressure ratio of 9, determine: (a) the percent thermal efficiency of the cycle. (b) the back work ratio. (c) the net power developed, in kW.
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370 T (K). The cycle has compression ratio of 10. In the constant volume heat addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine, (a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram) (b) the network output (c) the thermal efficiency (d) the mean...
QUESTION NO 1 In an Otto cycle air is compressed from an initial pressure 120 kPa...
QUESTION NO 1 In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature (T = 380). The cycle has compression ratio of 10. In the constant volume heat, addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine, (a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram) (b) the network output (c) the thermal efficiency...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370 T (K). The cycle has compression ratio of 10. In the constant volume heat addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine, (a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram) (b) the network output (c) the thermal efficiency (d) the mean...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT