Question
Download Solution PDFThe air standard efficiency of an Otto cycle is given by
where r = Compression ratio and
γ = Ratio of specific heats.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Otto cycle
The air-standard-Otto cycle is the idealized cycle for spark-ignition internal combustion engines.
The Otto cycle 1-2-3-4 consists of the following four processes:
- Process 1-2: Reversible adiabatic compression of air
- Process 2-3: Heat addition at constant volume
- Process 3-4: Reversible adiabatic expansion of air
- Process 4-1: Heat rejection at constant volume
The thermal efficiency of the Otto Cycle:
Compression ratio: r = v1/v2
The air standard efficiency of an Otto cycle is
Important Points
The air standard efficiency of a Diesel cycle is
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