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# A Diesel Cycle

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The cycle consists of the following stages;
1) 2 air is compressed adiabatically.
2) 3 heat is added at constant pressure.
3) 4 air is expanded adiabatically.
4) 1 air is cooled at constant volume.

An engine operating on a Diesel cycle takes in air at state 1 at 1 bar and 12oC. The maximum cycle temperature is at state 3 and is 1000oC. The ratio of the volume at state 1 to that at state 2, known as the compression ratio is 11. The cycle efficiency is given by;

?_(l )= 1 - ((T_4-T_1 ))/?(T_3-T_2 )

Determine the efficiency of the cycle.

A p-V diagram for a diesel cycle is shown in the attached document.

https://brainmass.com/engineering/mechanical-engineering/diesel-cycle-442724

#### Solution Preview

See the attached file.

The cycle consists of the following stages;
1) 2 air is compressed adiabatically.
2) 3 heat is added at constant pressure.
3) 4 air is expanded adiabatically.
4) 1 air is cooled at constant volume.

An engine operating on a Diesel cycle takes in air at state 1 at 1 bar and 12oC. The maximum cycle temperature is at state 3 and is 1000oC. The ratio of the volume at state 1 to that at state 2, ...

#### Solution Summary

This solution helps answer questions regarding the efficiency of a diesel cycle.

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