2. In an aircraft refrigeration as shown in the figure below, air bled from the jet engine is at 326 C and 690 kPaa at a rate of 5.5 kg per minute. Air enters the turbine at 102 C. For the air turbine consider a polytropic expansion n = 1.35 and a mechanical efficiency of 85%. The cabin pressure is 100 kPaa and the air exhausted from the cabin at 24 C. Assume that no air is by passed around the turbine. Determine: a) Tons of refrigeration developed b) COP of the system OUTSIDE COMPRESSOR TURBINE JET ENGINE Heat Exchanger (Air Cooler) By-pass air to control cabin temperature TURBINE Blower AIRCRAFT CABIN

2. In an aircraft refrigeration as shown in the figure below, air bled from the jet engine is at 326 C and 690 kPaa at a rate of 5.5 kg per minute. Air enters the turbine at 102 C. For the air turbine consider a polytropic expansion n = 1.35 and a mechanical efficiency of 85%. The cabin pressure is 100 kPaa and the air exhausted from the cabin at 24 C. Assume that no air is by passed around the turbine. Determine: a) Tons of refrigeration developed b) COP of the system OUTSIDE COMPRESSOR TURBINE JET ENGINE Heat Exchanger (Air Cooler) By-pass air to control cabin temperature TURBINE Blower AIRCRAFT CABIN

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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