HEAT DIFFERENCE ENGINE.

A heat difference engine demonstrates how a temperature difference can be converted into mechanical motion. A Stirling-type model is one way to explore this principle using a working gas that is repeatedly heated and cooled.

How the concept works

In a typical Stirling demonstration, the working gas moves between warmer and cooler regions. Its changing pressure acts on a piston, while a flywheel and linkage help carry the mechanism through its cycle. The engine requires a heat source and a cooler region; it does not create energy without an input.

What you can explore

• Heat transfer and temperature differences
• Gas expansion and compression
• Piston, crank, and flywheel relationships
• Observing friction and heat-loss effects

Applications and project scope

A teaching model for thermodynamics and energy conversion. Output depends on the model, temperature difference, friction, and construction quality; no output-power or efficiency rating is implied by this overview.