I'm building a peltier liquid cooler. I need help figuring out something now because I'm about to buy this thermostat that I would use to turn the cooler on and off. Can you help me figure out if this would work?

The link to the peltier pads I bought (two of them)

https://www.ebay.com/itm/TEC1-12726...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

These are the specs

Material: Ceramics
Size: 50mm x 50mm
Operates from: 12V DC
Operates Temperature: -30C to 70C
Max power consumption: 400W
Suitable For: Cooling

The thermostat is here https://www.ebay.com/itm/Temperatur...hash=item2cd07e93ff:m:mLxTliPCizC0gwhqfbjRABg and it comes in 12V/24V/220V

So I'm wondering if this thermostat would work and if so should I get a 24V or the 12V? I think that if I'm running two 12V peltiers through it that I might need 24V I'm not sure though because I haven't done anything with electronics in a long time. Also I'm not sure if it would be able to handle 800 WATTS because that's what I will be using to get maximum effects from the pads.

I bought two heat sinks for the hot sides and an aluminum water block to go in between like a sandwich. I've seen these before and that's what gave me the idea only this one is going to be a lot more hardcore. If I get it working it will be used on a couple of experiments I'm doing like cpu liquid cooling and a air tight hydroponic plant enclosure.

 

I think it's to late to edit my post so.... I need to add this. The power supply I'm planning to use is one for LED light strips.

https://www.ebay.com/itm/2X-400W-Sw...m=332461436043&_trksid=p2349526.c100854.m4779

This thing has all the right specs to run the peltier. 110 ac input / 12v 400watt output... It should be able to power one of my peltiers at full power or both at half power... am I right?

 

starting to remember this crap... so if I hook up a 400 watt device to the 400 watt psu its going to be working at max efficiency and that will generate tons of heat and cause it to break down quickly. rule of thumb is only use half of the psu ability for max life span and less heat. So I will be getting a 1000w psu check this one out.

https://www.ebay.com/itm/382311507924?var=651116980588

I could technically run both on it! I'm wondering how hot it will get running at 800 watts. I might have to buy another one if it gets hot.

 

12V, 800W means a current of 67A. Your thermostat link doesn't indicate a current rating but I found this one which looks identical to yours but includes 10A in the title which would seem to be a sensible maximum current. You will need to use the thermostat to power a relay which can switch 67A to the peltier devices. You will be usung a 12V supply so you need the 12V version of the thermostat and the extra relay should have a 12V coil.

 

Get the 12V thermostat it's rated at 10A , so you may need a slave relay to power the peltier, (400w@12V= 33A).

Get a psu with 200w to spare.

 

Make sure that you cool the TEC with water cooled copper tubing welded on to the TEC heat sink.

 

12V, 800W means a current of 67A. Your thermostat link doesn't indicate a current rating but I found this one which looks identical to yours but includes 10A in the title which would seem to be a sensible maximum current. You will need to use the thermostat to power a relay which can switch 67A to the peltier devices. You will be usung a 12V supply so you need the 12V version of the thermostat and the extra relay should have a 12V coil.

I was trying to figure this out thank you! I just need a "relay" I think that is a switch that will turn on to connect the wires. If I get the thermostat I should probably get the 110v thermostat so I can plug it into the wall. The relay would also need to be 110v but it also needs to be able to handle 400-1000 watts... I should be able to figure it out from here thanks a lot guys for your help.

also I have two server cpu heat sinks on the way probably have a lot of heat release potential but yeah I'm not sure if it will come close to being enough. I may need to invest into some water blocks and hook them up to a car air conditioning radiator. Those release a ton of heat I think they may also use 12 volts to power the fan but not sure.

 

If the relay is to 110V powered, to get the necessary current rating you might do better looking for contactors.