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murray13 · 12-20-2002, 01:14 AM

Acidwrz:

The rating for a peltier is how much heat (in watts) they can transfer at zero degrees delta T, it has nothing to do with how much power they use.

Go take a look at those graphs again. The 61% is constant for 0deg delta T or 0 watts heat transfer. As per the charts you referenced.

Take a look here:Typical Device Performance

If you really want to know how a peltier will perform download melcor's Aztec™ software.

Using the chart referenced (172W peltier): if you transfer 68W of heat you will have a delta T of about 37 deg C with the hot side @ 25 deg C, it will draw about 9.5 A at 19.2 V = 182.4 Watts.

12-20-2002, 01:14 AM	#11
murray13 Cooling Savant Join Date: Sep 2002 Location: Omaha, NE USA Posts: 216	Acidwrz: The rating for a peltier is how much heat (in watts) they can transfer at zero degrees delta T, it has nothing to do with how much power they use. Go take a look at those graphs again. The 61% is constant for 0deg delta T or 0 watts heat transfer. As per the charts you referenced. Take a look here:Typical Device Performance If you really want to know how a peltier will perform download melcor's Aztec™ software. Using the chart referenced (172W peltier): if you transfer 68W of heat you will have a delta T of about 37 deg C with the hot side @ 25 deg C, it will draw about 9.5 A at 19.2 V = 182.4 Watts.