How a Stirling engine works

No electricity – powered by heat.

Warpfive Stove Fans are small efficient Stirling engines, which only require heat to work. Stirling engines do not require any electricity to operate, and they do not have any electrical components in the construction. Stirling engines are purely mechanical, operate silently and are very reliable.

A Stirling engine works by moving a sealed volume of air from the hot bottom plate to the cool top plate of the engine. As the air moves from the cool plate to the hot plate it is rapidly heated, it expands and pushes the piston up. As the air is moved from the hot plate to the cool plate it cools rapidly and contracts, this creates a vacuum which pulls the piston down. This same volume of air is rapidly heated and cooled many times per second. As the piston is connected to a crank shaft it causes the crank to rotate and this produces the mechanical power to rotate the fan blades.

Invented by Robert Stirling in 1816.

Robert Stirling was born in Scotland on October 25, 1790. He studied at the University of Glasgow as well as Edinburgh University. Robert Stirling was a Presbyterian minister, he invented the Stirling engine and filed patents for the Stirling air engine and heat regenerator in 1816.

Development continues.

The Stirling engine is noted for its high efficiency, quiet operation, and the ease with which it can use almost any heat source. This compatibility with alternative and renewable energy sources has become increasingly significant as the price of conventional fuels rises. The Stirling engine is currently exciting interest as the core component of solar powered electricity generators, as well as in the space industry to power satellites.


Point focus parabolic mirror with Stirling engine at its centre.

Dish with Stirling engine at it's centre.