Air standard efficiency of the otto cycle | Mean Effective Pressure Tamil
#thermalengineering #ottocycle #otto #thermodynamics #engineering #mechanicalengineering #heat
Entropy change for a adiabatic process process | Engineering Thermodynamics
• Entropy change for a adiabatic process pro...
Reversible Adiabatic Process |Isentropic Process | Engineering Thermodynamics |Tamil
• Reversible Adiabatic Process |Isentropic P...
Adiabatic process | Isentropic Process | P V T relation | Thermodynamics
• Adiabatic process | Isentropic Process | P...
Reversible Adiabatic Process | Work done | Derivation
• Reversible Adiabatic Process | Work done |...
The air standard efficiency of the Otto cycle is given by the ratio of the net work output to the heat input at constant volume. The Otto cycle is a theoretical cycle used to model the behavior of a gasoline engine.
The air standard efficiency of the Otto cycle can be expressed as:
η = 1 - (1/r)^((γ-1)/γ)
where:
r = compression ratio
γ = specific heat ratio (ratio of specific heats at constant pressure and constant volume)
The compression ratio is the ratio of the volume of the combustion chamber when the piston is at the bottom of its stroke to the volume of the combustion chamber when the piston is at the top of its stroke. The specific heat ratio is a thermodynamic property of the working fluid (air in this case) and depends on the temperature and pressure.
The air standard efficiency of the Otto cycle can be improved by increasing the compression ratio or by using a working fluid with a higher specific heat ratio. However, practical limitations such as knocking and engine durability must also be taken into account.