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tec power options Answered

i was wondering where the best place to ask a question would be,

ive been playin with peltiers lately
and the ones i have are 0-16v 026A

i was wondering if there was any way to make a power supply for them
or some way to usa like a car batt. i was just worried as my deepcycle is like 1200 amp

dont really want to blow up my 30 a piece tec's 

the goal eventually is to mount like 10 to the undersides of an old aluminum icetray 
so i can submerge the bottom in water and fill the tray up, flip the power switch and in like 40 seconds have myself some icecubes

Discussions

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lemonie

8 years ago


A 12V deep cycle battery will be just fine, never mind what it can output.
These things are not very efficient, and need effective cooling on the hot sides.

L

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killerjackalopelemonie

Reply 8 years ago

Isn't there a bracket of temperature differences when they're at their best... Aim for that?

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lemoniekillerjackalope

Reply 8 years ago

Yes, but the reason professional refrigeration-engineers don't use Peltiers is that they are "shite" for it.

L

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furry1lemonie

Reply 8 years ago

if i recall the temp difference is 180' from the hot side,
so if i have the heatsinks of the hot side submerged then i should be able to get about -150' ish easy with just cool water,

a bucket of water should absorb the heat of a cup or two of the soon to be ice water (making up for the bad efficiency )


but the question isnt the tec's or the efficiency.


its how do i take a car battery and connect it to output 0-16v at 0-25 amps per line
times however many lines i decide to use

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furry1lemonie

Reply 8 years ago

it will take anywhere from 1 volt to 16 volts
so id say i want anwhere in the 12v - 16v range
at anywhere above 15 amps to say 26 amps which it the max rated for each unit


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lemoniefurry1

Reply 8 years ago


Use the battery as is, or listen to steve'.

L

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furry1lemonie

Reply 8 years ago

it just dosnt seem right to just connect two wires to a car batt.

it seems to simple

and none of you are actually answering the question

how do i
take car batt
and make (whatever) 8/12/16 volt (whatever) 10/15/20/25 amp lines that will go to each unit
or the array of them in parallel

do i simply need a wire and a fuse and hook em up ?
or what?

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steveastroukfurry1

Reply 8 years ago

You need a PWM based amplifier, in an H bridge

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lemoniefurry1

Reply 8 years ago


If the things are 12V I'd expect the battery to do them. For the control you ask about steve' knows better than I do.

L

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furry1lemonie

Reply 8 years ago

i want to know how to make the circuit.
that uses the car batt
and steps the power and voltage to the correct levels
for the peltiers 8/12/16 volt 10/15/20/25 amp (whatever works) lines each

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steveastroukfurry1

Reply 8 years ago

180 degrees ?

Hmm. Best case for performance is about half rated power and therefore 1/2 supply voltage, so these will work best at 200W and 8V supply

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furry1

8 years ago

8/12/16 volt (whatever) 10/15/20/25 amp lines

from car battery

all i want to know how to do is make the circuit,

to take the1200amp car batt

and limit the output (fuses or something)

to have lines that will power the tec at its optimal power
8v/ 12v/ 16v whatever
10a/15a/ 20a/ 26a whatever

something that i can do for every tec that i want to stack in the system


unless i wire them all at once, in which case thad be a different circuit,


but for now lets keep it simple and stackable single lines to each unit at rated power using batt as power

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furry1

8 years ago

50mm x 50mm x 3.64mm

Maximum power consumption 400 Watts

Operates from 0-15.4 volts DC and 0-26 amps

Operates from -60 deg C to +180 deg C

Each device is fully inspected and tested
Fitted with 6-inch insulated leads
Perimeter sealed for moisture protection
http://cgi.ebay.com/USA-GIANT-62mm-545-Watt-THERMOELECTRIC-PELTIER-COOLER_W0QQitemZ310249790565QQihZ021QQcategoryZ80149QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

although theese are what i intend to use to make my icetrays out of

http://cgi.ebay.com/USA-GIANT-62mm-545-Watt-THERMOELECTRIC-PELTIER-COOLER_W0QQitemZ310249790565QQihZ021QQcategoryZ80149QQssPageNameZWDVWQQrdZ1QQcmdZViewItem#ht_3557wt_1179

2mm x 62mm x 3.8mm
Maximum power consumption 545 Watts
Operates from 0-16 volts DC and 0-32 amps
Operates from -60 deg C to +180 deg C
Each device is fully inspected and tested
Fitted with 6-inch insulated leads
Perimeter sealed for moisture protection


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furry1

8 years ago

it will take anywhere from 1 volt to 16 volts
so id say i want anwhere in the 12v - 16v range
at anywhere above 15 amps to say 26 amps which it the max rated for each unit


furry1 (author) says:
it will take anywhere from 1 volt to 16 volts
so id say i want anwhere in the 12v - 16v range
at anywhere above 15 amps to say 26 amps which it the max rated for each unit

because i can do 12v 9.5A from old lead batt from my old scooter just fine,
but if i want to use 5 or 10 of em ill need 12 or 16v lines at 20 or 25 amps a piece