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Q2) In an air standard dual combustion cycle, the initial volume compression ratio is 13/1.

The maximum and minimum temperatures are 1500 K and 300 K, respectively.

The maximum and minimum pressure are respectively 67 bar and 1.13 bar.

(a) Sketch the processes on p-V and T-s diagrams: (2)

(b) Calculate EACH of the following:

(i) the temperature at all points; (10)

(ii) the thermal efficiency; (2)

(iii) the mean effective pressure. (2)

Note:

For air ɣ = 1.4 and C_p = 1.005  kJ/kgK, C_v = 0.718  kJ/kgK.