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When modelling an IC engine as a cold-air Otto Cycle which of the following assumptions are made (more than one correct answer) Select one or more: a. working fluid is air (only) b. working fluid circulates in a closed loop c. exhaust is represented by a heat rejection process d. expansion and compression processes are isothermal e. combustion process is isometric f. working fluid maintains a constant Cp and Cv

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Manetho

Answer:

a, b, c and f are correct.

Explanation:

List of assumptions take in  modelling an IC engine as a cold-air Otto Cycle are as following  

1. working fluid is air (only)

2.Working fluid circulates in a closed loop and always behaves in ideal way.

3. All the processes are internally reversible.

4. Combustion process is replace by heat addition process from an external source.

5. Exhaust process is replaced by heat rejection at constant

6. Expansion and Compression processes are isentropic , heat addition and rejection are constant volume.

7. Air has constant values of C_p and C_v.

hence, of all the option a, b ,c and f are correct and rest are incorrect.

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