(Solution) - The compression ratio of an air standard Otto cycle is -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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Pages: 5 Words: 1375

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The compression ratio of an air standard Otto cycle is 8. Prior to isentropic compression, the air is at 100 kPa, 20oC and 500 cm3. The temperature at the end of combustion process is 900 K. Determine
(a) The highest pressure in the cycle,
(b) The amount of heat input in kJ,
(c) Thermal efficiency and
(d) MEP. Use the PG model.
(e) What-if Scenario: What would the efficiency be if the compression ratio were increased to 10? Explain the change with the help of a T-s diagram.