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.
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A compressor takes in air at 100 kPa and 300 K and outputs at a
pressure...
A compressor works on a pressure of 105 kPa and temperature 300 K in a Brayton...
A compressor works on a pressure of 105 kPa and temperature 300 K in a Brayton cycle and has an efficiency of 45%. The exhaust temperature is 700 K. Find the pressure ratio and the specific heat addition by the combustion for this cycle. The inlet pressure of an air compressor is 100 kPa, with temperature 290 K, and brings it to 600 kPa, after which the air is cooled in an intercooler to 330K by heat transfer to the...
A compressor is takes in air at an inlet pressure of P1 = 80 kPa and...
A compressor is takes in air at an inlet pressure of P1 = 80 kPa and an inlet temperature of T1 = 20oC and exhausts it at an outlet pressure of P2 =800 kPa and an outlet temperature of T1 = 200oC. Air flows through the compressor at a mass flow rate of m = 1 kg/s. Assume that the compressor is adiabatic. Find the power required to run the compressor. (Your answer will be in kW.)
5. A compressor takes air from the atmosphere, which is at 100 kPa and 17 °C,...
5. A compressor takes air from the atmosphere, which is at 100 kPa and 17 °C, and compresses it to 500 kPa. The compressor is cooled at a rate of 100 kJ / kg of air throughput and the heat rejected to the surrounding air. Irreversibilities in the compressor increase the entropy of the air flowing through it by 0.2 kJ / kg. Calculate the work done and the entropy generated per unit mass of air.
A centrifugal air compressor used in a gas turbine receives air at 100 kPa and 300...
A centrifugal air compressor used in a gas turbine receives air at 100 kPa and 300 K and discharges it at 400 kPa and 500 K. The velocity of the compressor's outgoing air is 100 m / s. Ignoring the speed at the compressor inlet. Determine the power required to drive the compressor, in kW, if the mass flow is 15 kg / s. Take the Cp of air equal to 1 kJ / (kg K) and assume that there...
Air enters a compressor operating at steady state at a pressure of 100 kPa, a temperature...
Air enters a compressor operating at steady state at a pressure of 100 kPa, a temperature of 290 K, and with a mass flow rate of 0.72 kg/s. At the exit, the pressure is 700 kPa and the temperature is 450 K. Heat transfer from the compressor to its surroundings occurs at a rate of 3 kW. Kinetic and potential energy changes can be ignored. Determine the power input to the compressor, in kW. Assume that the air is an...
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...
Air at 300 K, 100 kPa in a rigid box is heated to 1000 K by...
Air at 300 K, 100 kPa in a rigid box is heated to 1000 K by a 1500 K source. a_ Find the final pressure. b_ Find the specific heat transfer. c_ Find the total entropy generation per kg air.
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...
Air enters the compressor of a cold air-standard Brayton cycle at 100 kpa, 300 k, with...
Air enters the compressor of a cold air-standard Brayton cycle at 100 kpa, 300 k, with a mass flow rate of 6 kg/s. the compressor pressure ratio is 10, and the turbine inlet temperature is 1400 K. For k = 1.4, calculate a. The thermal efficiency of the cycle b. The back work ratio c. The net power developed, in kW d. Reconsider the above with an ideal regenerator.
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...
5. A compressor takes air from the atmosphere, which is at 100 kPa and 17 °C, and compresses it to 500 kPa. The compressor is cooled at a rate of 100 kJ / kg of air throughput and the heat rejected to the surrounding air. Irreversibilities in the compressor increase the entropy of the air flowing through it by 0.2 kJ / kg. Calculate the work done and the entropy generated per unit mass of air.
Air enters a compressor operating at steady state at a pressure of 100 kPa, a temperature of 290 K, and with a mass flow rate of 0.72 kg/s. At the exit, the pressure is 700 kPa and the temperature is 450 K. Heat transfer from the compressor to its surroundings occurs at a rate of 3 kW. Kinetic and potential energy changes can be ignored. Determine the power input to the compressor, in kW. Assume that the air is an...
Air enters the compressor of a cold air-standard Brayton cycle at 100 kpa, 300 k, with a mass flow rate of 6 kg/s. the compressor pressure ratio is 10, and the turbine inlet temperature is 1400 K. For k = 1.4, calculate a. The thermal efficiency of the cycle b. The back work ratio c. The net power developed, in kW d. Reconsider the above with an ideal regenerator.
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...
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