• How the Stirling engine works

    A Stirling engine uses internal gas that’s alternately heated and cooled to produce energy. Hydrogen, for instance, is sealed in a chamber connected to a series of pistons. When the hydrogen is heated, it expands, driving the pistons through the chamber. When the hydrogen is cooled, it contracts, creating space for the next expansion. When attached to a flywheel or crankshaft, the pistons produce mechanical power, which can be used to generate electricity or pump water.

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