Otto, Diesel, and Dual Cycles The pressure-specific volume diagram of the air-standard Atk...

Otto, Diesel, and Dual Cycles The pressure-specific volume diagram of the air-standard Atkinson cycle is shown in Fig. P9.18. The cycle consists of isentropic compression, constant volume heat addition, isentropic expansion, and constant pressure compression. For a particular Atkinson cycle, the compression ratio during isentropic compression is 8.5. At the beginning of this compression process, p1 = 100 kPa and T1 = 300 K. The constant volume heat addition per unit mass of air is 1400 kJ/kg. (a) Sketch the cycle on T-s coordinates. Determine (b) the net work, in kJ per kg of air, (c) the thermal efficiency of the cycle, and (d) the mean effective pressure, in kPa.

Fig P9.18