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Q2. In an air standard diesel cycle, the volume at the end of heat supply is 1.8 times the volume at the beginning of the heat supply.

The temperature at the beginning of compression is 300 K and at the end of expansion it is 678.6 K. The thermal efficiency is 66.9 %.

(a) Sketch The cycle on Pressure- Volume and Temperature-specific entropy diagrams. (4)

(b) Calculate EACH of the following for 1 kg of air:

(i) The heat supply; (6)

(ii) The network output; (2)

(iii) The maximum cycle temperature; (2)

(iv) The volume compression ratio. (2)

Note: for air γ = 1.4 and c_p = 1.005 kJ⁄(kg K).