Performance of a compressor needs to be analyzed. Air enters the compressor of an air- standard Brayton cycle at 100 kPa, 300 K, with a volumetric flow rate of 5 m'/s. The turbine inlet temperature is 1400 K. The efficiency of the compressor is 70%. For compressor pressure ratios of 8, (draw layout and T-s diagram) analyze: a. The thermal efficiency of the cycle. b. Outline and compare the effect on cycle efficiency, if compression ratio is increased beyond 8?

Performance of a compressor needs to be analyzed. Air enters the compressor of an air- standard Brayton cycle at 100 kPa, 300 K, with a volumetric flow rate of 5 m'/s. The turbine inlet temperature is 1400 K. The efficiency of the compressor is 70%. For compressor pressure ratios of 8, (draw layout and T-s diagram) analyze: a. The thermal efficiency of the cycle. b. Outline and compare the effect on cycle efficiency, if compression ratio is increased beyond 8?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Air enters the compressor of an ideal air standard brayton cycle at 100 kPa, 300 K, with a volumetric flow rate of 5 cu.m/s. The compressor pressure ratio is 10. The turbine inlet temperature is 1400 K. Compute the (a) P, V, and T at each point of the cycle; (b) QA, QR in kW; (c) WC, WT in kW; (d) rp, TBW; (e) e; (f) mep.
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A diesel cycle with air as the working fluid has a compression ratio of 20. The temperature and pressure in the first process is 20°C, 95kPa and the highest attainable temperature is 1927°C. The air standard assumptions are applicable, both Kinetic and Potential energy are negligible. The mass/mass flow rate is negligible. Use the standard constants for air (Cp, Cy. R, and k). Determine the amount of heat transferred and rejected, the net work and thermal efficiency, and the mean effective pressure.
4.) An ideal Otto cycle engine with 15% clearance operates on 0.227 kg/s of air; intake state is 100 kPa, 37.7°C. The energy released during combustion is 110 kJ/s. For hot-air standard with k = 1.32, compute (a) p, V, and T at each corner, (b) W, (c) e, and (d) pm. Ans: (a) 0.2013 m³/s, 0.02626 m³/s, 596.2 K, 1479.85 kPa, 1136.4 K, 2820.7 kPa, 592.2 K, 191.71 kPa; (b) 52.7 kJ/s; (c) 47.91%; (d) 301.1 kPa
A,B and C were answered, proceed to D,E and F. Air enters the compressor of an ideal air standard brayton cycle at 100 kPa, 300 K, with a volumetric flow rate of 5 cu.m/s. The compressor pressure ratio is 10. The turbine inlet temperature is 1400 K. Compute the (a) P, V, and T at each point of the cycle; (b) QA, QR in kW; (c) WC, WT in kW; (d) rp, TBW; (e) e; (f) mep.
4.) An ideal Otto cycle engine with 15% clearance operates on 0.227 kg/s of air; intake state is 100 kPa, 37.7°C. The energy released during combustion is 110 kJ/s. For hot-air standard with k = 1.32, compute (a) p. V, and T at each corner, (b) W, (c) e, and (d) pm.
Air enters the compressor of an ideal air-standard Brayton cycle at 80 kPa, 299 K, with a volumetric flow rate of 6.1 m3/s. The compressor pressure ratio is 7. The turbine inlet temperature is 1886 K. Adopting the cold air-standard assumption, calculate: the mass flow rate of air to 3 d.p. in SI unit and privide unit symbol. Take the gas constant as 289 J/kg.K
Air temperature 30 ° C pressure 1 bar flows into the ideal gas turbine cycle by a pressure ratio air compressor (r). 12 The hot gas discharge temperature from the combustion chamber is 1200 K. The air flow in a constant cycle is 60 kg/s a. Draw the diagram T-5 of this cycle b. Find the net power output (kW). C. Find the thermal efficiency of this cycle
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An air-standard Brayton Cycle has an intake of 2.4M ft/hr at 43.2 lb.ft? gage. Given with a compression ratio of 6, temperature of turbine inlet is 1900 Rankine, temperature at the end of the isobaric heat rejection process is 90 °F, and the exit pressure of the turbine is 0.3 psig. Determine the Efficiency, in percent, nearest whole number. (Use Cp = 0.24 BTU/lb - R)