A Stirling engine, named after Robert Stirling, clergyman and inventor of what he called an "air engine", is a type of engine that creates a time-phase relationship between hot and cold temperatures to move a piston, that is harnessed to provide power. Patented in 1816, Stirling's engines couldn't explode (like steam engines ) and produced more power than the steam engines of the time. Stirling engines are also used as a fast cooling device, using a motor to move the piston making the engine very cold.
How it works
Do-It-Yourself model Stirling/Hot-Air maskiner