Re: cheap 200A AC to DC power supply?

acannell@xxxxxxx wrote:
I want to power 10 thermoelectric heat pumps at once from wall power.
(120VAC 60Hz). Ripple is somewhat important for these, but precise
voltage and current regulation is not. Each heat pump draws 17A at full
power, plus I need some extra current for fans, pumps, etc.. The heat
pumps need about 17V at full power. So I need an AC to DC power supply
which takes 120VAC 60Hz and outputs 17V at up to 200A. Could someone
point me in the right direction here? It needs to cost less than $200.
Ripple hurts these heat pumps but if its very slow I dont think it will
matter, even if its a couple volts. Current can vary up to say an amp.


Have you calculated the coefficient of performance of 10 thermoelectric heat pumps? 0.15 or so is typical with liquid cooled heatsinks. Much less otherwise.

These are generally TOTALLY USELESS above the one watt level.

Because the temperature RISE above their heatsink over ambient will GREATLY EXCEED their temperature drop across the module.

See http://tinaja.com/glib/hack68.pdf for a detailed analysis.

Would a vortex cooler work instead?

--
Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: don@xxxxxxxxxx

Please visit my GURU's LAIR web site at http://www.tinaja.com
.

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