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The centrifugal compressor shown here compresses air from 100 kPa, 27 °C to 600 kPa. This...
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 7.5 m3/s. The compressor pressure ratio is 10. The turbine inlet temperature is 1400 K. Determine the following: The thermal efficiency of the cycle The back work ratio The net power developed in kW
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 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 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...
A turboprop engine consists of a diffuser, compressor, combustor, turbine, and nozzle. The turbine drives a...
A turboprop engine consists of a diffuser, compressor, combustor, turbine, and nozzle. The turbine drives a propeller as well as the compressor. Air enters the diffuser with a volumetric flow rate of 63.7 m3/s at 40 kPa, 240 K, and a velocity of 180 m/s, and decelerates essentially to zero velocity. The compressor pressure ratio is 9 and the compressor has an isentropic efficiency of 85%. The turbine inlet temperature is 1240 K, and its isentropic efficiency is 85%. The...
An air refrigeration plant of 70.26 kW, capacity comprises a centrifugal compressor, a cooler hea...
An air refrigeration plant of 70.26 kW, capacity comprises a centrifugal compressor, a cooler heat exchanger and an air turbine. The compressor is coupled directly to the air turbine. The compressor also receives power from another prime mover. The processes in the compressor and the turbine are adiabatic but not isentropic. Air at temperature 294 K and 85 kPa enters the compressor. It leaves the compressor at 363 K. the same air enters the turbine at 311 K and 150...
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
Problem 2 C /25) A centrifugal compressor operating at 1500 rpm compresses air from 27 °C...
Problem 2 C /25) A centrifugal compressor operating at 1500 rpm compresses air from 27 °C and 10 kPa (Gage) to 80 kPa (Gage) at a mass flow rate of 2.6 kg/s. A bigger model is built by scaling up the impeller diameter by 50% of the original size. The model is to be tested with a gas that has the following properties: (Cp = 2.01 and c, = 0.76 ) at inlet conditions of 60 °C and 190 kPa...
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 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 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 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
Problem 2 C /25) A centrifugal compressor operating at 1500 rpm compresses air from 27 °C and 10 kPa (Gage) to 80 kPa (Gage) at a mass flow rate of 2.6 kg/s. A bigger model is built by scaling up the impeller diameter by 50% of the original size. The model is to be tested with a gas that has the following properties: (Cp = 2.01 and c, = 0.76 ) at inlet conditions of 60 °C and 190 kPa...
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 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)...
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