[extropy-chat] Greenhouse Power? (was A Grim Vision ...?)

BillK pharos at gmail.com
Mon Apr 16 15:35:21 UTC 2007

On 4/16/07, Robert Bradbury wrote:
> 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.

Just because it has a solar cell in it, doesn't make it a good idea.  :)

These devices move very little air and only take the edge off extreme
heat conditions.

When you get back to your car, if you open both doors wide and wait 15
seconds, you'll be better off than fitting one of these devices.

Alternatively, just drive for a few minutes with the windows down.

Put a reflective sunscreen up inside your windscreen.  (while parked :)  );
That really does work well.


More information about the extropy-chat mailing list