[sdiy] peltier elements dimensioning

[René Schmitz]

Hi Martin,

Czech Martin wrote:
> If I use a peltier element with 20W pump power (giving about 40W
> total power consumption since most elements seem to output
> only 0.5 of total power as pump power) 
> this should lead to 8.8K cooling, i.e. down from 25C to 17C.
> In the same way 40W pump power will cool 17.5K, i.e. @ 25 down to 7.5C.
> The total power consumption will be arround 80W then.

Hmm, temperature is the same thing as energy. And power is work (i.e. an
energy difference) per time unit. So I would say the power rating tells
you how fast you can cool or heat things up. (Assuming there are no
losses. And that efficiency is independant of the temperature difference.)

Cheers,
  René


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uzs159 at uni-bonn.de
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