Passive cooling, or how I misplaced a while experimenting

Good day everybody! On this put up, I need to share my ideas concerning cooling in telephones—and the top of my experiments as properly.

TLDR: I modified the ineffective "cooling plate" to make it extra helpful, and it <perhaps> helped. IMO concept of fine passive (or energetic) cooling will not be insane.

Earlier than we go to my heck of an invention, couple of ideas why this (or comparable method) will not be ineffective. What’s the weakest level of warmth dissipation within the cellphone? It's how warmth is handed from cellphone to the air. Aluminium, titanium, glass – any materials is actually inefficient right here. So, the one approach to make it higher is both: a) use cooler to interchange heated air with room temperature air to maintain temperature distinction between floor and air as excessive as doable (the upper temperature distinction between supplies, the extra warmth is transfered between supplies) b) enhance the floor space

However methods to enhance the floor space? And right here I got here up with the next reply: aluminium/copper plate with heatsinks on it. Particularly, the next sandwitch: <cellphone glass floor, if doable – connection to steel elements> <some smooth materials that conducts warmth fairly properly, like thermal pad> <alluminium/copper plate> <some meterial to carry heatsinks (additionally ofc thermal conductive; ideally, heatsinks needs to be a part of the plate> <variety of heatsinks>

This sandwich will work higher as a result of the thermal conductivity of the weakest connection (glass-thermal pad) remains to be nice sufficient to warmth the entire plate and heatsinks (it's essential to have as much less as doable air pockets between cellphone and plate). When they’re heated to a cellphone beneath load temperature (round 40° Celsius), the warmth dissipation between the air and this answer might be better due to the elevated floor space contact.

Curiously sufficient, for warmth dissipation, I relied solely on air convection and didn’t account for radiation. As my later "analysis" (a chat with Gemini, take it with a grain of salt) confirmed, radiation really performs a giant half in warmth dissipation, and glass radiates higher than aluminum. So, my answer could hinger this radiation a bit of bit.

Now, testing. I ran a number of occasions in a row (like 3-4) the 3D bench, wild life excessive stress take a look at. My cellphone reaches peak rating of 5000. With out my answer, cellphone drops to 2500-3000 (however apparently sufficient, in a single run, it was in a position to maintain 3500 with temperature round 44°). With my answer, the rating was 3500 on two consequative runs two occasions. The utmost temperature was round 41°. As I used to be too lazy to check it extra completely, I made a decision this was sufficient proof for me that this answer works – however it's not sufficient to declare that this can all the time work.

And eventually, my setup on second pic – the plate is pressuraised by Razer Kishi V2 to my cellphone (to scale back variety of air pockets), the sponge to not harm the controller.

If in case you have any key insights, I’d actually like it when you shared them right here. I’m not an engineer, and I constructed this factor totally on instinct.