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Running in perpetuity...?

"It's not totally efficient, which is why it won't run in perpetuity,"

Oh dear.

Given a big enough thermal gradient between the item being cooled (the chip) and the surrounding medium (air), a Stirling engine should run indefinitely.

This thing won't stop due to *inefficiency*, it will stop once the CPU has cooled sufficiently.

Theoretically, if the chip is perpetually on, the engine will run in perpetuity, even though it is not a perpetual motion device.

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