Howzit, DH?

I just had a stoner thought.
Got a pile of peltier devices that I intended to use as active heatsinks.
Until I found out how much current they draw. Ouch!
Got a dozen of them on the shelf.
They work both ways.
Heat one side, and/or cool the other, and it acts like a thermocouple and generates current.

Then your idea of mounting the 15s on homemade "stars" got me thinkin'.
We're eating Watts to remove heat with the fan.

Perhaps we should stop seeing the heat as a waste product and put it to work for us.

Here's what I propose.
Epoxy one, or two 15 Watt Ledengin emitters to the chip side of the peltiers.
Then bolt the fin sides to a large heatsink with a fan.
Use the temperature difference to generate enough current to run the fan!
As the fan cools the big 'sink, it "bootstraps" the fan power a little more as the temp. difference increases.
Does that sound semi-sane.

I'll have to buy some emitters to try it with and see how many units it would take to run a fan.
Ambient can get to 90F. here, so a 50 degree difference would have to suffice.
If it works, it's self regulating!
And, dare I say, rather elegant.:thumbsup:
That's why I call this MMJ, Cogito.:jointsmile::detective1:

Aloha.

Weezard