New Peltier cooling mod

Hello!

I have an ASUS K53sm which is getting hot sometimes, so even if it's still in waranty period i would like to modify it. I have a Peltier element (75w) attached with the hot side to a nice heatsink and i'm planning to use it like this:

-first i will cut a square hole (4x4 cm2) at the bottom of the laptop to expose the heatpipe.

-I will fit and glue with thermoconductive adhesive a copper shim to the heatpipe so that the copper plate will be perfectly aligned with the rest of the bottom plate.

-when needed, i will attach the peltier with thelmal pad or paste to the copper bottom plate to cold down the heatpipe, thus the processor and GPU.

I could use a voltage selector for the peltier to decrease power to avoid condensation.
With this mod i could cool down my laptop without letting dust acumulate inside my laptop.
When i need portability from my laptop i simply deattach the peltier from the exposed copper plate.

Do you think it will work?

Sorry for my english and thank you in advance for youre help.

 

Yeah, it would work, but daaamn that would look ugly .

My advice (as always, lol) is to attach a copper sheet with holes (as thick as possible) to the end of the heatsink before the fan intake using thermal paste - an extension of sorts. Best mod I've ever done and should work on most laptops that have a fan pulling air from the bottom.

 

You are aware that TECs are extremely inefficient and will increase the heat needing to be transported away? A better solution would be to simply attach another heatsink to the copper shim instead - needs less power and will most likely cool significantly better. I'd simply buy a high performance heatpipe(s)+heatsink/fan from some gaming notebook and use it instead, the performance will most likely be much _much_ better.

From my experience:
TECs have their uses but only for cooling very close to and under the ambient temperature, however to get a reasonable temperature difference (delta T in most TEC datasheets) one have to 4-8x the pumping capacity compared to the heat load or 180-360W for a 45W processor. This produces a lot of heat so the only reasonable way to cool the TEC is water cooling. Using it to get a low delta-T requires less powerful TECs and less cooling capacity but still isn't something I'd ever think about doing to a notebook that will be transported. Oh I almost forgot: to get close to the specificed performance one have to have the TEC under pressure - the ceramic material in them doesn't conduct heat well so pressure+good thermal goop are essential. As most metals conduct heat well and the cold and hot sides of the TEC have to be thermally separated as much as possible plastic bolts are the best choice - but there will still be a hot->cold leakage.

 

I really wouldn't advise this. After trying to rig a small TEC setup for room cooling, I don't believe it's practical for a laptop honestly.

You need to have a way of pumping the head away from that TEC unit's hot side. Peltiers are cheap, but figuring out how to cool them down is the expensive and hard part. If you run it pure open air, the peltier will fry fairly quickly. Even if it doesn't, one side is going to get really hot, and that doesn't help its efficiency in cooling the other side.

You also need a separate power supply to power that thing. It's going to eat a lot of power, more than the laptop is designed to put out (something akin to telling it to power a second CPU I think).

You would also be running on thin ice with condensation. Even if you used voltage control, one mistake means a fried notebook.