Final answer:
The thermal efficiency of the diesel engine is 54.3% and the MEP is 91.59 kPa.
Step-by-step explanation:
To determine the thermal efficiency of the diesel engine, we need to use the equation for thermal efficiency:
Thermal Efficiency = 1 - (1 / Compression Ratio)^(γ - 1)
where γ is the specific heat ratio.
Substituting the given values, we have:
Thermal Efficiency = 1 - (1 / 22)^(1.4 - 1) = 0.543
To determine the MEP (Mean Effective Pressure), we need to use the equation for MEP:
MEP = (Maximum Pressure - Minimum Pressure) / (Compression Ratio - 1)
Substituting the given values, we have:
MEP = (1900 kPa - 95 kPa) / (22 - 1) = 91.59 kPa