1.How many piston strokes are there in an Otto cycle? (Please Explain why?) 2.At

Question

1.How many piston strokes are there in an Otto cycle?

(Please Explain why?)

2.Attached in the following pages is the technical specification of a Caterpillar diesel generator.
By treating it as a power cycle, use the technical data to estimate the thermal efficiency of this
diesel generator. For simplicity, the unit ekW can be treated as equivalent to the unit kW. (Hint:
This is meant to be a simple problem, please don

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Explanation / Answer

in otto cycle there are 2 strokes and 4 strokes also..

in 2 stroke otto cycle one is compression stroke another is expansion stroke

in 4 strokes auto cycle compression stroke ,heating stroke,expansion stroke and exhaust stroke(cooling stroke) are there,,,

...........

total heat rejection =1145.8+2472.5+342.6+249.0+163 =4372.9 kW

efficiency = output work /input energy = 2600/(2600+4372.9) =0.37287 =32.287%

........

ask if you have any more doubt

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