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eX&TriC · 05-28-2002, 03:08 PM

I know what you mean.

I know now that TECs are relatively more efficienant at low voltages. So if you raise the voltage the amount of watt gained is decreasing or you got a curve like the black one:
What you are saying if you only get 40W is that the blue curves apply to the TEC
so that a little gain in voltage in the low part 2-3 gives you a
smaller raise in W than from 12-13V Which you are denying later
in you post saying "1 more V can get you a lot more cooling when you're at 12V then when you're at 18V" So the black curve applies and you can never have +-50W (2/7 of 172W) at half voltage 12 (1/2 of 24V)

My confusion comes from the fact that

If you drop the V in half you also lower the A so you only
get one quarter of the watt wich would be on the blue curve.
just like Y=X^2 with x>0 But how do you explain the fact that
tec are more effective at low voltages and that 75% is the
best ratio.

I hate this

I need TO KNOW

05-28-2002, 03:08 PM	#11
eX&TriC Cooling Neophyte Join Date: Oct 2001 Location: Belgium (center of the universe) Posts: 51	I know what you mean. I know now that TECs are relatively more efficienant at low voltages. So if you raise the voltage the amount of watt gained is decreasing or you got a curve like the black one: What you are saying if you only get 40W is that the blue curves apply to the TEC so that a little gain in voltage in the low part 2-3 gives you a smaller raise in W than from 12-13V Which you are denying later in you post saying "1 more V can get you a lot more cooling when you're at 12V then when you're at 18V" So the black curve applies and you can never have +-50W (2/7 of 172W) at half voltage 12 (1/2 of 24V) My confusion comes from the fact that If you drop the V in half you also lower the A so you only get one quarter of the watt wich would be on the blue curve. just like Y=X^2 with x>0 But how do you explain the fact that tec are more effective at low voltages and that 75% is the best ratio. I hate this I need TO KNOW __________________ P4 1.8A @ 2.4 - 256MB PC1066 - GF4 355/780 Peltchilled- Last edited by eX&TriC; 05-28-2002 at 03:34 PM.