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# final - the air in the combustor is 800 KJ/Kg Determine a...

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Name: Name: ENME 320 Final Examination 1 2 3 (1-y) y 7 6 5 4 Problem 1 Steam enters the first stage turbine of a Rankine cycle, with regeneration, at 10Mpa and 500C, steam is extracted at 0.5 Mpa and the condenser pressure is 10 Kpa. The net power is 180 MW. Assume the turbines to be isentropic and the pumps to be 70% efficient Determine a. The fraction of mass flow rate of steam extracted b. The mass flow rat of steam c. The mass flow rate of cooling water if its temperature increases by 8C d. The thermal efficiency of the cycle. e. Draw the T-s diagram

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Problem 2 Air enters the compressor of an ideal Brayton cycle at 100 Kpa and 300K, with a vol. Flow rate of 4 m 3 /s, the turbine inlet temperature is 1450K. The rate of heat transfer to

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Unformatted text preview: the air in the combustor is 800 KJ/Kg. Determine a. The combustor pressure b. The net power of the cycle in KW c. The cycle efficiency A regenerator with an effectiveness of 90% is incorporated in the cycle d. Determine the new cycle efficiency e. Sketch the T-s diagram Problem 3 A Diesel cycle has a compression ratio of 20, at the beginning of the isentropic compression the pressure is 200 Kpa, and the temperature is 380K. The heat addition per unit mass is 1000 KJ/Kg Determine: a. The maximum temperature in the cycle b. The cutoff ratio c. The net work per unit mass of air d. The cycle efficiency e. The Mean Effective Pressure f. Sketch the T-s diagram...
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