Compare the air-standard cycle thermal efficiencies of an Otto cycle obtained by calculating the state points around the cycle with the value obtained from Eqn (3.16) for an 'engine' operating with a compression ratio, \(r\), of 15:1, and an air-fuel ratio, \(\varepsilon=28: 1\) The trapped conditions are \(1.0 \mathrm{bar}\) and \(27^{\circ} \mathrm{C}\). Assume \(Q_{p}^{\prime}=44000 \mathrm{~kJ} / \mathrm{kg}\), the specific heat capacity at constant volume, \(c_{\mathrm{v}}\), is \(0.721 \mathrm{~kJ} / \mathrm{kg} \mathrm{K}\), and \(\kappa=1.4\). The trapped conditions are 1 bar and \(27^{\circ} \mathrm{C}\). [66.1\%;65.62\%]

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R= K PO(-4) (P-R)da (16.16a) T (1-x) P=K'm m(po) (16.16b)