172w 24v(16a) pelt ran at draw? 12v how many amps would it

qwerty57 · 05-03-2003, 06:36 PM

would it still need all 16amps even tho its being run at half its req. voltage??

Zhentar · 05-03-2003, 08:24 PM

V=IR

24V=16A*R

R=1.5 ohms

12v=I*1.5

I=8amps

P=IV

P=8*12

P=96 watts

Anything else?

Since87 · 05-03-2003, 09:25 PM

Quote:

Originally posted by Zhentar
V=IR

24V=16A*R

R=1.5 ohms

Except a pelt is not a resistor. A pelt is capable of outputting power when a temperature differential is maintained on the two sides.

When a pelt is powered to maintain a temperature differential, there is a Seebeck voltage associated with the temperature differential that reduces the current draw of the pelt.

Pelts also have a substantial Temperature Coefficient of Resistance making it complicated to calculate the performance of a pelt.

Here is a Kryotherm simulation of a 172 Watt pelt powered at 12V, and cooling a 35 Watt GPU:

Edit: BTW, for this simulation: P=67W

Zhentar · 05-03-2003, 09:28 PM

damn. I hate it when people who know more than I do prove me wrong...

muffy · 06-29-2003, 05:12 PM

on my pc at 14.5 volts it draws 4.3 amps so 62 w

05-03-2003, 06:36 PM	#1
qwerty57 Cooling Neophyte Join Date: Apr 2003 Location: hollywood, fl Posts: 40	172w 24v(16a) pelt ran at draw? 12v how many amps would it would it still need all 16amps even tho its being run at half its req. voltage??

05-03-2003, 08:24 PM	#2
Zhentar Cooling Savant Join Date: Apr 2003 Location: Madison, WI Posts: 225	V=IR 24V=16AR R=1.5 ohms 12v=I1.5 I=8amps P=IV P=8*12 P=96 watts Anything else?

05-03-2003, 09:28 PM	#4
Zhentar Cooling Savant Join Date: Apr 2003 Location: Madison, WI Posts: 225	damn. I hate it when people who know more than I do prove me wrong...

06-29-2003, 05:12 PM	#5
muffy Cooling Neophyte Join Date: Jun 2003 Location: Auckland, New Zealand Posts: 40	on my pc at 14.5 volts it draws 4.3 amps so 62 w

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