How does a solar stirling engine work?

Question: How does a solar stirling engine work?

Answer: First let’s cover the basics of a Stirling engine. A closed chamber containing a gas, usually air or helium, is heated at one end and cooled at the other. This difference in temperature produces pressure changes due to the expansion or contraction of the gas. A solar Stirling engine simply uses the heat from the sun to power the engine. Usually a large piece of metal is used with a Fresnel lens focusing the sunlight on it. Imagine the way a magnifying glass can be used to ignite things like leaves or paper. That’s really all there is to it. Below is a good video showing this effect.

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