Reason for low efficiency of open cycle gas plant

Q.  The efficiency of the open cycle gas plant is quite low. Why?
- Published on 19 Nov 15

a. Gas gets cooled before reaching the turbine wheels.
b. A lot of mechanical energy is used up by the compressor.
c. Both (a) and (b).
d. None of these

ANSWER: Both (a) and (b).

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