In an Otto cycle, the compression ratio is 9:1 and the pressure and temperature at the beginning of the compression process are 100 kPa and 10°C. The heat addition by combustion gives the highest temperature as 2500 K. Specific heat added by combustion is:
1.305 MJ/kg
Using standard air constants γ=1.4 and cv≈0.718 kJ/(kg·K), T₂=T₁r⁰·⁴=283.15×9⁰·⁴≈681.9 K. Constant-volume heat input is qin=cv(T₃−T₂)≈0.718(2500−681.9)=1305.4 kJ/kg≈1.305 MJ/kg.
Important Questions from Otto Cycle
A petrol engine theoretically operates on
In an Otto cycle, how does heat addition take place?
Otto cycle is also known as
The efficiency of diesel cycle approaches to Otto cycle efficiency when
In an Otto cycle, the compression ratio is 9 : 1 and the pressure and temperature at the beginning of the compression process are 100 kPa and 10°C. The heat addition by combustion gives the highest temperature as 2500 K.Thermal efficiency of the cycle is:
