Solved: Otto, Diesel, and Dual Cycles An air-standard Otto
Chapter 9, Problem 7P(choose chapter or problem)
An air-standard Otto cycle has a compression ratio of 8 and the temperature and pressure at the beginning of the compression process are \(520^{\circ} \mathrm{R}\) and \(14.2 \mathrm{lbf} / \mathrm{in}^2\), respectively. The mass of air is \(0.0015 \mathrm{lb}\). The heat addition is \(0.9 \mathrm{Btu}\). Determine
(a) the maximum temperature, in \({ }^{\circ} \mathrm{R}\).
(b) the maximum pressure, in \(\mathrm{lbf} / \mathrm{in.}^2\)
(c) the thermal efficiency.
(d) To investigate the effects of varying compression ratio, plot each of the quantities calculated in parts (a) through (c) for compression ratios ranging from 2 to 12 .
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