110 points) Air at standard conditions enters the compressor at a rate of 12 ft3 tank...
1. Similar to Problem 8-70 Air enters a compressor at ambient conditions of 15 psia and 50°F with a low velocity and exits at 150 psia, 620°F, and 350 ft/s. The compressor is cooled by the ambient air at 50°F at a rate of 1500 Btu/min. The power input to the compressor is 1000 hp. Determine (a) the mass flow rate of air and (b) the portion of the power input that is used just to overcome the irreversibilities. WRITE...
Air enters the compressor of an air-standard Brayton cycle with a volumetric flow rate of 60 m3/s at 0.8 bar, 280 K. The compressor pressure ratio is 17.5, and the maximum cycle temperature is 2100 K. For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%. Determine: (a) the net power developed, in kW. (b) the rate of heat addition in the combustor, in kW. (c) the percent thermal efficiency of the cycle.
P1) (50 points) - Air is compressed steadily by a 7.5-kW compressor. Air enters a compressor at a pressure of 100 kPa, a temperature of 290 K and a velocity of 6 m/s through an inlet with an area of 0.005 m2. At the exit, the pressure is 700 kPa, the temperature 480 K and the velocity is 2 m/s. Determine: a) heat transfer that takes place between the compressor and the surrounding medium at 290 K, in kW and...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of 20 m3/s at 0.8 bar, 280 K. The compressor pressure ratio is 20, and the maximum cycle temperature is 1950 K. For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%. For a regenerator effectiveness of 86%, determine: (a) the net power developed, in MW. (b) the rate of heat addition in the combustor, in MW. (c)...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of 100 m3/s at 0.8 bar, 280 K. The compressor pressure ratio is 20, and the maximum cycle temperature is 2100 K. For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%. For a regenerator effectiveness of 86%, determine: (a) the net power developed, in MW. (b) the rate of heat addition in the combustor, in MW. (c)...
Air enters a compressor at 95kPa, 15C at a rate of 50 cubic meters per second. It leaves at 1.2 MPa. The process is essentially adiabatic with no changes in potential or kinetic energy. Determine the power required to drive the compressor if a. The process is reversible b. The compressor has an isentropic efficiency of 87%
2_9: Air enters a compressor operating at steady state at 14.7 lbf/in2, 70 oF, 23 ft/s through a 155 in2 opening. Air exits the compressor at 90 lbf/in2, 480 oF, 6.5 ft/s. Heat transfer from the compressor to its surroundings occurs at a rate of 2.8 Btu/s. Determine the power input required for the compressor, hp
become friends with it 3. Air enters a compressor at atmospheric conditions of 20°C and 80 kPa and exits at 800 kPa and 200 C. Calculate the rate of heat transfer is the power input is 400 kW The air exits at 20 m/s through an exit diameter of 10 cm. Hint Use the exit conditions to calculate the mass flow rate / "mass flux," m, in kg/s. The sign of Q will tell you whether the compressor is gaining...
A flow rate of 0.4 m / s of air enters a compressor at 100 kPa. 20ºC and 20m / s and leaves at 500C and 120 m / S. Determine the power of the compressor if the heat losses are 3000 kJ / min.
3_4: Air from the surrounding atmosphere at 100 kPa, 20 oC, enters a compressor with a velocity of 8.6 m/s through an inlet whose diameter is 36 cm. The compressed air exits at 650 kPa, 225 oC, with a velocity of 2.8 m/s. The rate of entropy generation for the compressor is 0.062 kW/K. Determine the power input to the compressor, kW.