(Solved): Q7 - Consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion ...

Q7 - Consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3 . The air enters each stage of the compressor at \( 300 \mathrm{~K} \) and each stage of the turbine at \( 1200 \mathrm{~K} \). Determine the back work ratio and the thermal efficiency of the cycle with an efficiency of 86 percent for each compressor stage and an efficiency of 90 percent for each turbine stage., assuming (a) no regenerator is used and (b) a regenerator with 75 percent effectiveness is used.