A four stroke limited pressure cycle (dual) engine draws 1.2 kg/sec of air at 1.03kg/cm2 and 27°C. Compression ratio of the cycle is 16. Pressure ratio during constant volume heat addition is 2.0. Total heat added is equal to 550 kcal/kg of air in the cylinder. Determine
(i) pressure, volume and temperature at all salient points,
(ii) % of heat added during constant pressure process,
(iii) cut-off ratio
(iv) thermal efficiency,
(v) mean effective pressure.
Represent the cycle on p—V and T—s planes. Assume Cp = 0.24 kcal/kg°K and Cv = 0.17 kcal/kg°K.