Quote:
Originally posted by LightningCrash:
efficiency doesn't mean jack squat.
cooling power is what counts. most peltiers deliver their maximum cooling power at their suggested voltage.
when you drop the voltage of a 24v pelt to, say, 18v, you may make the ratio of heat transfered:heat generated lower, but your overall cooling capability is adversely effected.
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If you run the peltiers on 75% of Umax then you'll have around 90% or more of the Qc left but you have reduced the heat the peltier itself produce a lot, about 40-45% less.
You will probably have o lower temprature on the hotside and the peltier will be easier to cool. And you'll have a lower overall temperature!!
But of course if you have an EXTREMLY good cooling on the hot side you'll go for Umax.
[ 09-16-2001: Message edited by: mr_Voodoo ]