[extropy-chat] Greenhouse Power? (was A Grim Vision ...?)
robert.bradbury at gmail.com
Mon Apr 16 14:38:27 UTC 2007
On 4/15/07, Lee Corbin <lcorbin at rawbw.com> wrote:
> Keith writes
> > Think about how hot it gets inside a parked car in the summer and you
> will get an idea of how hard it would be to seal up a greenhouse. You could
> also look up the power bills for cooling Biosphere II.
> Why doesn't this furnish a productive energy source? That is, the
> temperature difference generated between such an enclosure and the outside
> sounds as though it could be useful.
The thermodynamic efficiency of harvesting power from a 10-20 deg.
temperature difference isn't high enough to justify the infrastructure. I
have seen solar cells you can hang on the outside of the window which power
cooling fans to keep the car from getting hot however. So you can harvest
some of the solar energy to keep the car from becoming a sauna.
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