Heat engine

Ø   A heat engine is designed to convert heat energy into mechanical energy which can be used to do mechanical work.

Ø    This engine made up of tree parts.

1 Source ( which provide Heat energy )

2 Working substance ( as a vapor of gas )

3 Sink (cold body )

Ø    In the overall system, the hot body is the source of heat and sink is cold body.

Working:

Ø    Heat engine gained heat energy from the source via Working substance, does some mechanical work and reject the heat into the sink.

Ø    If the complete two revolutions per unit time then its known as four stroke engine.

Ø    While the revolutions will be one per unit time then its known as two stroke engine.