29 September 2017 2 8K Report

Air enters the compressor of a regenerative air-standard Brayton cycle at 100kPa,300K. The compressor pressure ratio is 10. The turbine inlet temperature is 1400K.

The isentropic efficiency of the compressor is 85%.The isentropic efficiency of the turbine is 87%. The regenerator effectiveness is 85%.

Determine:

(a) the thermal efficiency of the cycle,

(b) the back work ratio

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