Question

An air compressor, operated at steady state, compresses air from
1 bar 25^{o}C to 10 bar. At the outlet of the compressor,
the air temperature is 80^{o}C. The compressor transfers
heat to the surroundings at 300kJ for each kg of air passing
through the compressor. The average temperature at which the heat
is transferred is 50^{o}C. Which of the following values is
closest to the specific entropy production of the compressor
process? For air, Cp=1.01 kJ/kgK and R=0.286kJ/kgK. Hints: Air can
be treated as ideal gas.

Answer #1

ANSWER

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