Mechanical heat engines convert heat into work via various thermodynamic processes. Mechanical energy is of particular importance in transportation, but also plays a role in many industrial processes such as cutting, grinding, crushing, and mixing. Some natural processes, such as atmospheric convection cells convert environmental heat into motion (e.g. Many of these processes generate heat as an intermediate energy form, so heat engines have special importance. geothermal), chemical energy, electric potential and nuclear energy (from nuclear fission or nuclear fusion). energy of the Earth's gravitational field as exploited in hydroelectric power generation), heat energy (e.g.

ДЄvailable energy sources include potential energy (e.g. Mechanical energy to power the aircraft's electrical and hydraulic systems can be taken from the turbine shaft, but thrust is produced by expelled exhaust gas.ДЄn engine or motor is a machine designed to convert one or more forms of energy into mechanical energy.

Jet engine uses heat of combustion to generate a high-velocity exhaust as a form of reaction engine.

An introduction to ic engines