In an air standard cycle pressure at the beginning of compression is 1 bar, while temperature is 310 K. Compression ratio is 10:1, Heat added is 2800 KJ/Kg of charge. The maximum pressure limit is 70 bar. If heat is added partially at constant volume partially at constant pressure,

Given: $T_1= 310K, P_1 = 1 bar, V_1/V_2 (Comp Ratio) = 10, Q = 2800 kJ/kg, P_3 = P_4 = 70 bar$.

Solution:

At 1, applying Ideal Gas Equation,

$P_1V_1 = RT_1$

$10^5 × V_1 = 287 × 310$

$V_1 = 0.8897m^3/kg$

Therefore

$V_2 = V_1/10 = 0.08897^{1.4}$

Now, for …