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How to find hot side from a peltier element? Answered

hi how to find hot side and cold side from a peltier element?

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steveastrouk (author)2012-11-06

Put power in,
note polarity, Red is positive, Black is negative.
Note which side gets hot,
note which side gets cold.
Write it down.
Job done.

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rickharris (author)steveastrouk2012-11-06

Attach power place hand on device - Say ouch - You found the hot side.

PS is your hand is stuck you found the cold side.

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AngelAscanio (author)rickharris2012-11-20

I understand steveastrok. If you buy a peltier cell and then you apply voltage without using heat disipators, BOTH SIDES GET WARM/HOT quickly, so you can't tell which is the hot side.

Honesttly frollard, ironic comments doesn't help in this community.

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user

No, not if you are careful, and quick.

I have used Peltier cells in scientific applications for 25 years or more,

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iceng (author)AngelAscanio2016-01-11

Levity in science is like a wave riding a gigacycle in a magnetic field.

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rickharris (author)AngelAscanio2012-11-21

As far as I know the cell gets warm on one side and cooler on the other with an efficiency of around 5 - 10%.

You shouldn't need to heat sink the cooling side to get it to work.

http://en.wikipedia.org/wiki/Thermoelectric_cooling

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steveastrouk (author)rickharris2012-11-06

Oops missed that stage..

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frollard (author)steveastrouk2012-11-06

I like it...it's like the weather reporting rope.

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rickharris (author)frollard2012-11-06

Got one of those it's 100 correct! More than you can say for the weather Office

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sandy.12345 (author)steveastrouk2012-11-30

when applying voltage to the peltier it should be attached with the heat sink otherwise it will be damaged

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PaulA128 (author)2016-01-11

The vast majority of TECs have an ID printed on their heated side.

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steveastrouk (author)sandy.123452012-11-30

Not if you do it quickly. A few seconds is fine. They are only damaged if the elements reach over 150 C, which can take many seconds.

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