Air at 2.5 bar, 400 K is extracted from a main jet engine compressor for cabin cooling. The extracted air enters a heat exchanger where it is cooled at constant pressure to 350 K through heat transfer with the ambient. It then expands adiabatically to 1.0 bar through a turbine and is discharged into the cabin. The turbine has an isentropic efficiency of 80%. If the mass flow rate of the air is 2.5 kg/s, determine: (a) the power developed by the turbine, in kW. (b) the magnitude of the rate of heat transfer from the air to the ambient, in kW.
Air at 2.5 bar, 400 K is extracted from a main jet engine compressor for cabin cooling. The extracted air enters a heat exchanger where it is cooled at constant pressure to 350 K through heat transfer with the ambient. It then expands adiabatically to 1.0 bar through a turbine and is discharged into the cabin. The turbine has an isentropic efficiency of 80%. If the mass flow rate of the air is 2.5 kg/s, determine: (a) the power developed by the turbine, in kW. (b) the magnitude of the rate of heat transfer from the air to the ambient, in kW.
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 at 2.5 bar, 400 K is extracted from a main jet engine compressor for cabin cooling. The extracted air enters a heat exchanger where it is cooled at constant pressure to 350 K through heat transfer with the ambient. It then expands adiabatically to 1.0 bar through a turbine and is discharged into the cabin. The turbine has an isentropic efficiency of 80%. If the mass flow rate of the air is 2.5 kg/s,
determine:
(a) the power developed by the turbine, in kW.
(b) the magnitude of the rate of heat transfer from the air to the ambient, in kW.
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