Here's a challenge for the micromachining crowd: a Stirling engine that's so small that random molecular motion makes it run kind of rough:
World's smallest Stirling
Dec 12, 2011
2 Replies
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It's 3 micrometers in size. The article doesn't say if that's height, width, or length, but does it matter?
My reading has shown me that it's not a Sterling engine if it doesn't have a regenerator -- hot air engines were around before the Reverend Stirling, they just weren't nearly as efficient.
And they're saying that the working fluid is a liquid, not a gas.
So there does seem to be lots of hot air, but I don't think it's in the engine.
Pffhhhht. So, it's an engine that alternately heats and cools the working fluid to apply force to a piston.
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