Question Bank • QB_EXP_FP_CYC_020 NAT • 2 Marks

Section 3: Farm Power

Sources of Power

Subtopic: Thermodynamic cycles of IC engines

Question Statement:

Referring to the Diesel cycle diagram, at state 1 air enters at $p_1 = 100\text{ kPa}$ and $T_1 = 300\text{ K}$. If the compression ratio $r = 16$ and $\gamma = 1.4$, determine the temperature $T_2$ at the end of isentropic compression in Kelvin (round off to the nearest integer).

Answer Key:

909

Step-by-Step Solution & Explanation

For isentropic process $1 \to 2$: $T_2 = T_1 (r)^{\gamma - 1} = 300 \times (16)^{0.4} = 300 \times 3.0314 = 909.4\text{ K}$.
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