An ideal air-standard Otto cycle engine has a compression ratio of 8. At the beginning of the compression process, the w

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An Ideal Air Standard Otto Cycle Engine Has A Compression Ratio Of 8 At The Beginning Of The Compression Process The W 1 (66.49 KiB) Viewed 25 times

An ideal air-standard Otto cycle engine has a compression ratio of 8. At the beginning of the compression process, the working fluid is at 100 kPa, 27°C (300 K), and 800 kJ/kg heat is supplied during the constant volume heat addition process. Neatly sketch the pressure-volume [P-v] diagram for this cycle, and using the specific heat values for air at a typical average cycle temperature of 300K (Cv = 0.717 kJ/kg.K, and k = 1.4) determine: a) the temperature and pressure of the air at the end of each process [P2 = 1838 kPa, T2 = 689K, T3 = 1805K, P3 = 4815 kPa, P4 = 262 kPa, T4 = 786K] b) the net work output/cycle [kJ/kg), [451.5 kJ/kg] c) the thermal efficiency Inth) of this engine cycle. In th= 56%]