DieselShip's Online Content Library

Q2. In an air standard dual combustion cycle 720 kJ/kg of heat is added at constant volume, the remaining 60 % of the total heat supply is added at constant pressure.

The minimum pressure and temperature in the cycle are 1.05 bar and 311 K respectively.

The volume compression ratio is 14 : 1.

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

(b) Calculate EACH of the following:

(i) The pressure and temperature at each point in the cycle; (6)

(ii) The specific work output; (3)

(iii) The Theoretical mean effective pressure. (3)

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