Random power generation thought

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eno31krad
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Sorry didn't look too deep into it but had a random thought (and a couple drinks) ; would it be plausible to generate power by harnessing angular momentum from passing molecules? Perhaps hydro and wind generators could get an efficiency boost?
 
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Angular momentum of molecules is randomly distributed, how would you sort out their directions to get a net increase in the motor? This is similar to the idea of Maxwell's Demon.