The science behind the idea is fluid enough, but will you be able to resist frying yourself up a quick snack on it?
Ok, so it's not as if you'll be able to pick them up at the local chippy, but circuit boards covered in oil may soon be available on a limited scale according to this post at
PCW.
Apparently, Sheffield-based PC manufacturer Very-PC has announced that it'll soon be making servers submerged in oil available on the market.
While it doesn't sound entirely safe at first the theory behind the tech is sound in that, because oils like cooking oil are less conductive to electricity than other liquids (like water), systems can be submerged in them without risking a short.
The oil will, in theory, provide a powerless cooling system as the heated oil rises to the top, cools down, and then sinks to the bottom in a standard convection cycle.
Whether it'll be a success financially or not remains to be seen, but from a pure geeky perspective we have to admit we like the idea for it's crazy (and potentially tasty) applications.
We're always looking for the oddest mods around, so if this is tame by your standards then why not pop by
the forum and put us straight?
I know i am eh.. weird.. :D
Welcome new staff guy ;) (I loved Monkey Island too)
What a classic :D
*Note to self, never use comebacks from games in a real life situation*
But it would be a huge hassle to upgrade, it would be much heavier to move, I can't really see any benefit, possible more consistent temps over time as dust is less likely to accumulate around the heatsink preventing flow.
It would be quite fine in the short term, but over the long term and given the sizes of contacts/traces these days it would not be fun after a few years. :(
The charges of the contacts would also be a draw for the debris (a la electrostatic painting)
I also don't foresee this being able to handle an 8800GTX SLI setup without additional cooling, but for that hassle you might as well use the secondary cooling system as the primary in the first place.
as far as the ability of such a system to do significant cooling I have faith. these oils would have a higher specific heat (IIRC) than air as such it would take more energy to heat up than air, convection and heatsinks would handle flow. and radiation/sublimination would release the energy into the air, proof-of-concept systems have been made before. Also a decent amount of electrical transformers which handle much higher voltage and temperatures are oil submerged/cooled. there also might be an aspect of maintainence over the years though in terms of contamination and such
If you think about the average amount of power used by fans in your typical 2-4U server. They're never pansy-fans, and I'm sure it adds up, particularly over the years (and with an entire farm).
10W x 3 = 30W? Even if that's extreme, and per-server, it's a difference that could turn up some interesting TCO differences over a 5-year period.
Also, if Intel can sell new chips based on lower-power requirements, surely Very-PC could sell their new server-cooling solutions based on the promise of eliminating the need for powerful (and noisy!) fans in the system. It's not as nuts as it sounds, and especially considering I'm due to be working in an office with a number of servers locked up in a £1,800 sound-proofed rack -- something I'm sure the management would rather have not forked-out for!
Though there are problems, of course. Fumes? If the oil gets too warm, it could begin to evaporate, causing some unpleasant smells (chips in the morning, afternoon and evening?) There's also the possibility of needing to top-up the oil, and what may be the most important consideration: How long until the oil needs replacing? If that winds up being too often, then I should imagine any benefits in TCO would go straight out of the window with the downtime required to "change the server oil".
But pushing the reduced power requirements, they could be on to something, should they manage to squash any bugs in the theory.
I think they tried several types of oil, and yes smell was one drawback (as far as I remember)
I myself managed to get hold of 25L of transformer oil to try it out, but never got any further than that. If anyone reading this lives in Copenhagen and wants to try this I'll be happy to donate the oil. This oil is probably some of the best for the job as it's designed to cool electronics (at very high voltage), only drawback is that as far as I remember also smells quiet bad.
If done that way I can see this being quite practical for servers. Desktops will still be the domain of air and water cooling though.
The comments were particularly interesting :)
Its gotta be good for a few laughs even if it doesn't work out!
Anyone up for it??
Some One idea to put out there for anyone working on such a thing is some sort of external cooling with the return being directed to hot spots in the system for directed cooling.
In a server environment, I could see a shared manifold on a rack where each server connects and they all dump their heat to a small concentrated location rather than dump all the waste heat to the air. A valve system could be used to pump the oil out of the system, then cut it off from the manifold. I think there are hydraulic fittings that could be used to prevent spills in such a system.
As for power, I'm dealing with a server now that, if all the system cooling is going on full, could not be supplied by low end ATX PSU and that is just the fans. If the system works to reduce power consumption, and does not cause too many problems for the admins, it could be worthwhile.
But would a water cooling system using a similar shared lead system be equally as good?
I assume the fans could be removed and the convection currents in the oil would kepp them cool?
Or can the oil conduct fast enough to do away with the heat sink altogether:D?
http://www.pugetsystems.com/submerged.php
http://www.pugetsystems.com/gfx/submersion/gallery/SubRad2.jpg
Modifying an oil pump from an engine might be a better option than using a water pump with oil.
Those power transformers you see at the top of Stobie Poles (power poles) and in substations use mineral oil for cooling.
Vegetable oil turns rancid after a little while so it should be avoided.
Silicon oil might be a good alternative.
"Sir are you aware that you are leaking cooling fluid at an alarming rate?"
If I could find a old running PC i'd see if I could run it in oil