At the beginning of the compression process in an air-standard dual cycle, p1 = 1 bar and T1 = 300 K. The total heat addition is 1000 kJ/kg. Plot the net work per unit of mass, in kJ/kg, the mean effective pressure, in bar, and the thermal efficiency versus compression ratio for different fractions of constant-volume and constant-pressure heat addition. Consider compression ratio ranging from 10 to 20.

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