On Feb 21, 10:07*pm, Bob La Londe wrote:
How much real cooling can you get with the cheap peltiers you find for
sale on Ebay. *My shop gets pretty hot in the summer, but its just not
practical to keep my controller computers in the office. *I was
thinking about making mini duct/shrouds to draw air over the cold side
of a peltier into the PC cases.

Peltiers are maybe 25% efficient, so you'd be adding perhaps half a
kilowatt into the shop air. Could you swap in a fancy gamer CPU
heatsink? A Peltier on the cold side of one would do more good than
trying to cool the intake air.

I've used a Peltier to cool a diode laser, 8 Amps at 12V of input
power to remove ~15W of heat.

The little Summit dorm room refrigerator behind me is 15-3/4" wide
inside, (barely) enough to hold the old Dell Optiplex on my desk. It
draws 150-160W.

jsw