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Plymouth State University Operations And Supply Chain Management Assignment Help - In the Otto


Question - In the Otto cycle all the heat transfer qH occurs at constant volume. It is more realistic to assume that
part of qH occurs after the piston has started its downward motion in the expansion stroke. Therefore,
consider a cycle identical to the Otto cycle, except that the first two-thirds of the total qH occur at
constant volume and the last one-third occurs at constant pressure. Assume that the total qH is 2100
kJ/kg, that the state at the beginning of the compression process is 90 kPa, 20?C, and that the
compression ratio is 9. Calculate the maximum pressure and temperature and the thermal efficiency
of this cycle. Compare the results with those of a conventional Otto cycle having the same given
variables.

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