Treating the air as an ideal gas with constant specific heats, plot the following:
(a) the thermal efficiency of an Otto cycle, Diesel cycle, and dual cycle, with the Diesel cycle and dual cycle having cut-off ratios of 3, and the dual cycle having a pressure ratio of 1.5, as the compression ratio of each varies between 5 and 15.
(b) the thermal efficiency of a Diesel cycle and a dual cycle, with the dual cycle having a pressure ratio of 1.5, with both cycles having a compression ratio of 18, and with the cut-off ratio of each varying between 1.2 and 4.
(c) the thermal efficiency of a Diesel cycle and a dual cycle, with the dual cycle having a pressure ratio of 1.5, with both cycles having a cut-off ratio of 2.5, and with the compression ratio of each varying between 15 and 25.
(d) the thermal efficiency of a dual cycle, with a compression ratio of 18, and with the pressure ratio varying between 1 and 2.
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