6.6 Heat Engine
A heat engine converts some thermal energy to mechanical work. Usually, the heat comes from the burning of a fuel. The earliest heat engine was the steam engine. It was developed on the fact that when water is boiled in a vessel covered with a lid, the steam inside tries to push the lid off showing the ability to do work. This observation helped to develop a steam engine.
The working principle of a heat engine is based on the conversion of heat energy into mechanical work through a cyclic process. Here is how a heat engine typically operates. The working principle of a heat engine involves the cyclic transfer of heat energy from a high temperature reservoir to a low temperature reservoir, with the objective of converting as much heat as possible into mechanical work. This process is governed by principles of thermodynamics and is essential in various applications where mechanical energy is required from heat sources.