Cooling LGA 775 CPU using Peltier

[richardscott]

you cant stack pelts cos the first one generates and trasnfers heat from the source then the second one has to transfer its own heat plus the heat off the first pelt and also the heat of the source and so on 😛.

 

[kaboooom2000uk]

Actauly I know differently,

Assuming you get the peltier into a state whereby you dont actualy create a hot side, (as its well heatsinked) you then create a condition where the othr modules run much more efficently.

As you correcly said, the devices pump the heat from one module to the other. The result will be of course the need for a very big heatsink and possibly a radiator of sorts on the hotside, to remove the heat, but the cooling power of the combined units will be astronimoical. I have made one in the past using copper blocks between modules, and had the hot side mounted to a 1" thickk 500mmx500mm slab of aluminum as a heatsink. It generated a lot of ice, hovewer i have no pictures of it in action, however il be making a new one very soon when my 10x 138W modules come in the post.

I think if you have tried and failed the above technique, you probaly should consider machining your own heatsinks, unless you already have... the goal in any peltier system, get the hot side as cold as you can, and the cold side will get bloddy cold.

hope this helps.

 

[richardscott]

yea well i bet if you try useing 10 pelts all you will do is burn out the last few cos of the heat loads. you cant run a pelt without there being a hot side its just how they run. as for the ammount of heat needed to pass through the last pelt in your 10x138w is near 1380w plus what ever your trying to cool. as you will know a 138w pelt cannot transmit that ammount of heat and it will burn out. the only way of doing it is to stack ever more powerful pelts that will give your desired effect. eg 10w then 25x then 60w then 150w then 400w etc etc