Engine Thermal Efficiency (\(\xi_{\text{theo}}\)):

\[ \xi_{\text{theo}} = \frac{C \cdot W_t}{Q_t} \times 100 \]\

Where:

• \(\xi_{\text{theo}}\) is the theoretical thermal efficiency, %.
• \(W_t\) is the theoretical work, kg-m.
• \(Q_t\) is the supplied heat quantity, Kcal/hr.
• \(C\) is the conversion constant.