Thermo electric cooling.

[FluffyNugs]

What if, instead of cooling the cpu with the Peltie you cooled coolant and had the pump push the liquid its self?

 

I.e. putting the Peltie on the radiators to cool that liquid.

[Electronics Wizardy]

Like this most things peltier, sure you can, but at the amount of cooling you want for a overclocked CPU(cause if your not ocing why bother) your probably better off with a phase change system as they are much more efficient. Peltiers are really only good for things that don't need much cooling(like a camera sensor), or you can't use a phase change system for some reason.

[FluffyNugs]

I mean the water cooling loop is normal, but you use the Peltie to cool the air and or side of the radiator.

[Electronics Wizardy]

11 minutes ago, FluffyNugs said:

I mean the water cooling loop is normal, but you use the Peltie to cool the air and or side of the radiator.

That doesn't really change anything, your still limited by the inefficiency of a Peltier cooler. You need a lot of watts to cool

 

Take a look of datasheets of Peltier coolers and run the numbers and you see very quickly how much power it would take to cool a 300w CPU for example.

 

The other big issue is the bigger the delta T the less the heat the Peltier units can move. So if you have a delta T of lets say 40c, an example datasheet shows the unit going from a peak performance of 280w to 120w, so your gonna need a lot of those units to cool things. You also now need a lot more heatsink to get rid of the extra heat. 

[RONOTHAN##]

9 minutes ago, FluffyNugs said:

I mean the water cooling loop is normal, but you use the Peltie to cool the air and or side of the radiator.

Still doesn't consider how bad peliter elements are at cooling. They take a ton of power to do anything, and that heat that's it's moving needs to go somewhere. You'd end up with a loop that's twice as big at a minimum for not much extra performance. 

 

Peltier elements are only really useful for keeping things cold, not cooling things down. Most of them are only rated to move at most 10W of heat if you're lucky while dissipating something around 30W. For the amount of power you'd need to get this to do anything, you'd be better off just going phase change since that just does everything better and will save you on power quite quickly. . 

[Skiiwee29]

<-- Moved to Custom Loop and Exotic Cooling  -->

[Somerandomtechyboi]

for things that draw basically no power like rams it should work pretty well given you limit current and maybe cascade them to reduce ∆t that the peltiers are handling for better efficiency as those graphs all show some real pathetic performance at higher ∆t and higher imax

 

here are said graphs and some stuff about peltier efficiency and yeah not even going to consider them for cpu cooling but for stuff like ram and maybe northbridges they should work very well and be both cost effective and have somewhat decent performance though theres gonna be lots of fabricating

 

my idea is to salvage some 120mm or 240mm aio as in extend the loop to another waterblock where the 4-8 peltiers will lie and current limit the peltiers to .2-.3 imax for any semblance of efficiency as that should be quite cheap with those used 10-20$ aios and maybe cost closer to 50$ total with temperature target of -20c and power consumption below 100w prefferably close to 50w given rams dont exactly draw much power nor put out much heat, should let me clock my oem cfrs higher and probably push to 2.3v without degradation where im stuck at only 2.1v right now for a safe value

[thrasher_565]

peltiers or atlest the cheap ones can only handle so much like 50w or somthing

 

you thinking of a 2 loop system (has a name but cant think of it...) Plate Heat Exchangers.

anyway you got this rad that had 2 in and 2 out. were loop 1 is the normal loop and loop 2 is the other and it cooles the loop 1 coolent. but cant get too low you you get condensation witch will kill things.

 

there a thing called a tec that was this but cost like $400 and take extra power...

 

 

 

Edited April 27, 2025 by thrasher_565

[BungBoogMoog]

Peltier cooling is not ideal for very high transiently spiking but mostly idling heat loads like a typical workstation/client PC.

 

The ideal use case for peltier cooling are applications wher STABILITY of the temperature is critical

 

to be even blunter:  When stability ISNT a big factor they are a tremendous waste.

 

however, when you need <0.1 degree temperature fluctuation, which is possible because Peltier modules are inherently solid state and can rapidly respond to increasing or decreasing heat loads and stay ahead of temperature fluctuations, the tradeoff in wall plug efficiency and bulkiness of the modules is worth it.

 

Hence the most typical applications of Peltier modules are in laboratory instruments like IR cameras/sensors, laboratory and industrial lasers used for metrology or micromachining, and generally other applications where the need for fast, accurate, and precise control of temperature are critical.

 

In general if you do not need sub-ambient temperatures, then water cooling is the industry standard practice and used pretty much everywhere.

 

On 4/26/2025 at 10:06 PM, thrasher_565 said:

peltiers or atlest the cheap ones can only handle so much like 50w or somthing

 

you thinking of a 2 loop system (has a name but cant think of it...) Plate Heat Exchangers.

anyway you got this rad that had 2 in and 2 out. were loop 1 is the normal loop and loop 2 is the other and it cooles the loop 1 coolent. but cant get too low you you get condensation witch will kill things.

 

there a thing called a tec that was this but cost like $400 and take extra power..

 

 

A TEC - or Thermo Electric Cooler - is a generic synonym for a Peltier Module.

 

You might find some product segmentation based on the name, ie where products marketed for different applications will have different names used, but the devices are exactly the same, no difference.

[FluffyNugs]

this is all i was talking about....