Direction: In two air standard cycles - one operating in the Otto and the other on the Brayton cycle - air is isentropically compressed from 300 to 450 K. Heat is added to raise the temperature to 600 K in the Otto cycle and to 550 K in the Brayton cycle.
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If W0 and WB are work outputs per unit mass, then
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- W0 > WB
- W0 < WB
- W0 = WB
- it is not possible to calculate the work outputs unless the temperature after the expansion is given
Correct Option: A
W0 = η0CV × 150 = 35.54 kJ/kg
WB = η0CP × 100 = 33.165 kJ/kg
