Question

For the same maximum pressure and temperature, what is the order of efficiency of Otto, Diesel, and Dual cycle?

• A. \( \eta_{\text{Otto}}>:\eta_{\text{Diesel}}>:\eta_{\text{Dual}} \)
• B. \( \eta_{\text{Otto}}>:\eta_{\text{Dual}}>:\eta_{\text{Diesel}} \)
• C. \( \eta_{\text{Dual}}>:\eta_{\text{Otto}}>:\eta_{\text{Diesel}} \)
• D. \( \eta_{\text{Diesel}}>:\eta_{\text{Dual}}>:\eta_{\text{Otto}} \)

Hint:

Efficiency comparisons between different thermodynamic cycles are crucial for applications like internal combustion engines where fuel economy and power output are significant.

Answer 1

The Correct Option is B

Comparing cycle efficiencies.
The Otto cycle typically has the highest efficiency due to constant volume heat addition. The Dual cycle, which combines features of both Otto and Diesel, tends to have a moderate efficiency. The Diesel cycle generally has lower efficiency compared to the Otto cycle at the same maximum pressure and temperature due to its constant pressure heat addition process.