e) To prevent the heat loss from the compressor to the surrounding, the compressor is well insulated. Assuming the exit temperature of the air remain the same, find the new power required by the compressor, kW. f) Does the process as in (e) satisfy or violate the second law of thermodynamics. Show the calculation to support your answer.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Air is compressed steadily by a compressor from 100 kPa and 27°C to 800 kPa and 290°C.
The mass flow rate of the air is 15 kg/min. During the process, the heat is lost from the
compressor at a rate of 15 kW to the surrounding at 27°C. Assume air to be an ideal gas and
the changes in kinetic and potential energies can be neglected.
Transcribed Image Text:Air is compressed steadily by a compressor from 100 kPa and 27°C to 800 kPa and 290°C. The mass flow rate of the air is 15 kg/min. During the process, the heat is lost from the compressor at a rate of 15 kW to the surrounding at 27°C. Assume air to be an ideal gas and the changes in kinetic and potential energies can be neglected.
e) To prevent the heat loss from the compressor to the surrounding, the compressor is
well insulated. Assuming the exit temperature of the air remain the same, find the
new power required by the compressor, kW.
f) Does the process as in (e) satisfy or violate the second law of thermodynamics.
Show the calculation to support your answer.
Transcribed Image Text:e) To prevent the heat loss from the compressor to the surrounding, the compressor is well insulated. Assuming the exit temperature of the air remain the same, find the new power required by the compressor, kW. f) Does the process as in (e) satisfy or violate the second law of thermodynamics. Show the calculation to support your answer.
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