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(10)
(a) an engine works on dual combustion cycle. The pressure and temperature at the 5
beginning of compression are 1 bar and 27°C respectively and the compression ratio
being 12. If the maximum pressure is 50 bar and the heat received at constant pressure
is for 1/30 of the stroke, find the work done per kg of air and the thermal efficiency.
Take Cp=1.004 kJ/kg K and Cv-0.717 kJ/kg K.


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Mechanical Engineering

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