Question

Air at 1 atm, 60 F is compressed to 4 atm, after which it is expanded through a nozzle back to the atmosphere. The compressor and the nozzle are both reversible and adiabatic and kinetic energy in/out of the compressor can be neglected. Find the compressor work and its exit temperature and find the nozzle exit velocity.

Answer 1

Separate control volumes around compressor and nozzle. For ideal compressor we have

inlet : 1 and exit : 2

Adiabatic : q = 0.

Reversible: sgen = 0