The Second Law of Thermodynamics means you can't solely operate a heat
engine from a cold bath to a warm bath -- whether the cold bath is the
troposphere, or the ocean. But, as Michael Hayes mentioned, you *can*
run a heat engine between the troposphere (or surface) and space. But
building such a technology is quite difficult, of course. His PNAS
citation is an interesting read.
David
On 2/10/2018 11:39 AM, Michael Hayes wrote:
Hi Folks,
In this overall category of tech,
Emissive Energy Harvesting is about 4-5 years old now:
http://www.pnas.org/content/111/11/3927.short
The mid-infrared energy can be converted to energy that can be either used as
electrical energy or simply beamed off the planet without affecting the
atmosphere.
I suspect work in the field of metamaterials will expand the options this field
of tech.
Best regards,
Michael
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