Ionic Winds Chilling Your Computer

Iddo Genuth writes to mention The Future of Things online magazine is reporting that Kronos Advanced Technologies in cooperation with Intel and the University of Washington claims to have developed a new type of ultra-thin, silent cooling technology for processors. The piece covers many of the cooling technologies currently available, how their new corona discharge cooler works, and a short interview with several of the key team members.

Comments

double entendre

[User 956]

Kronos Advanced Technologies in cooperation with Intel and the University of Washington claims to have developed a new type of ultra-thin, silent cooling technology for processors. The piece covers many of the cooling technologies currently available, how their new corona discharge cooler works

Now that's what I call vaporware.

Re:double entendre

[Anonymous Coward]

Seconded. With so many physics inaccuracies in the 'overview' alone, one becomes dubious.

Exibit A: "Modern heatsinks are incapable of effectively cooling high-end CPUs, not to mention high-end GPUs, without the assistance of a fan." Tell that to owners of Tuniq towers.

B: "The most popular method for cooling modern computers is based on pushing air using fans. This method is sometimes combined with passive cooling,..." Sometimes? Anyone tried pointing a fan at a chip and praying recently?

C: "Active cooling is much more efficient than passive cooling alone and is also relatively cheap." By what measure of efficiency? Not power consumption. I assume they mean efficacious.

D: "Water has a higher specific heat capacity as well as better thermal conductivity relative to that of air (meaning water can transfer heat over greater distances more efficiently than air)". No, that's not what that means and the bogus interpretation isn't even accurate (never mind precise). Tell that to a jet engine exhaust. "higher specific heat capacity as well as better thermal conductivity" means it can soak up more heat per unit volume, and it can pull that heat from a smaller area than in the case of air. Physics 001.

Then they describe what sounds like "point a fan at a chip and pray". Unless ionised gases have some miraculous thermal properties I have never heard of, how do they get around the surface area problem. Aha, from TFA, they're targeting mobile devices. So these things have pissant cooling power. Anyone else concerned about putting ionised gases (aka free radicals) near their face? Advertising bumph. Case closed. How sad.

Re:double entendre

[Michael Woodhams]

The ion cooler fan casemod is linked to in comments hanging off the article.
version 1
version 2

Re:double entendre

[Xyrus]

There are some serious issues that need to be resolved before this thing can be used.

The problem with electrostatics is that they have a tendency to charge any metallic object within their field.

I took apart one the cheap $20 ionic air filter and did some experiments with electrostatic propulsion just for fun. It's not much above the 8KV range. However, put an aluminum can an inch or two away and touch it with a grounded metal object and you get a small spark from the aluminum can. So if you did have something like this in your machine, you better shield it so it doesn't inadvertently fry some other component.

I can't imagine them implementing an ionic cooler at too much less than 8KV. At 1 KV, you're not going to get anything as far as ionic wind goes. My guess is that they wouldn't use anything less than 5KV.

You also have to make sure that all the ions get neutralized, or you'd end up with objects being charged again.

You'd also have to be mindful of dust collection (which ionic breeze machines do exceptionally well) and be in a relatively stable environment.

To maximize ionic wind, you need the electron source to be on the verge of arcing to the anode (arcing kills the breeze). Unfortunately, this is dependant on many factors including air pressure, humidity, temperature, etc. So they would probably play it safe and set it back a bit to prevent arcing. Of course this lowers the wind, which means they need to use a higher voltage to acheive the same effect.

I'm not saying it is impossible, but it's also not a walk in the park either. Electrostatics and computer components don't play well together. And given the power of most modern day cpu fans, you're going to need a lot more than a mere 5-8 KV ionic wind to achieve the same cooling effect.

Now if they were talking about electrohydrodynamics using water, that's a little different. Basically, you can use electrohydrodynamics to pump water in a liquid cooling system without needing any moving parts. The concept is very similar to using an ionic breeze, only this time the medium is water. Since you have a denser medium, you can generate more force using electostatics (you can knock more electrons free as there are more in the immediate area).

You still run into the problem of high voltage and shielding, but a liquid cooled system without any moving parts sounds pretty interesting to me.

~X~

That's a team I want to be on

[udderly]

The piece covers many of the cooling technologies currently available, how their new corona discharge cooler works, and a short interview with several of the key team members.

I sure hope that they remember to remove the lime first.

dupe?

[radicalnerd]

I don't understand how this device, which uses an "electrostatic fluid accelerator," is different from this "electrostatic precipitator."

hmm

[Swimport]

Sounds a lot like this: http://inventgeek.com/Projects/IonCooler2/Overview .aspx

It will be too toxic

[Anonymous Coward]

According to TFA this technology makes use of a huge amount of ions (apparently ozone O3 and NOx) which are toxic! http://en.wikipedia.org/wiki/Ionizer

Another numberless article

[Pedrito]

Where are the numbers? How much heat does it dissipate? Everything is vague: "it can cool modern cpus" okay, well, I can run a modern CPU at 100MHZ if I want and then it won't require any cooling. An article like this without any specifics is hardly Slashdot material. This is regular news material, if that.

Re:Another numberless article

[Dr. Eggman]

An article like this without any specifics is hardly Slashdot material.

Can you specify what makes an article 'Slashdot material?'

Re:Another numberless article

[LordPhantom]

In general, it has to have been posted on Slashdot previously.

Re:Another numberless article

[jazir1979]

but then...how would anything ever...? *head explodes*

Snakeoil, Mostly

[Total_Wimp]

There is no special cooling effect being harnessed that's any more complicated than blowing on your soup. All this does is move air. If the comparison of various air purifiers I read is at all accurate, it doesn't even do that very well (Ionic Breezes faired poorly due to poor air flow).

This does have a place in mobile computing because fans have pretty strict size and shape limitations. Also, silence is golden to many. Other than that, a fan and heatsink should offer far superior performance.

TW

What about all that dust?

[TheSexican]

Won't it get quite dusty in there?

Ozone?

[AVIDJockey]

Wouldn't this increase the amount of ozone in the immediate vicinity? It's probably not as bad as an Ionic Breeze in that regard, but put dozens or hundreds of these things in an office space or computer lab and it wouldn't exactly be the healthiest breathing environment.

Ozone

[Anonymous Coward]

I have worked with tesla coils for years, I can tell you this is like begging for a headache! That thing would make a nice amount of ozone, and what does ozone do to living things and metals boys and girls?

Whiskey Tango Foxtrot?

[ewhac]

This story doesn't pass the smell test.

First, for corona discharge to occur at all requires thousands of volts of energy. Basically enough to leap off the conductor -- and into the semiconductor. This is easily several times the amount of voltage needed to fry any VLSI chip.

Second, the amount of airflow generated by corona discharge is infinitesimal, especially given the amount of energy required to get it to happen at all. Some simple thermal models will tell you how much air you have to displace in order to remove a given amount of heat, and you'll see that you're never going to get that kind of volume moved via corona discharge.

Maybe there have been some new discoveries since I last played with static electricity. But personally I think someone's shoveling bovine offal.

Schwab

Give John Sokol the credit

[Jonathan Walther]

Back in 2002 when John Sokol was designing the first, and still the most efficient silent computer, we discussed the ionic air cooling. I think it was Bill Drury who first mentioned it. We put it off as a possible future direction to go. It didn't seem like it would be nearly as productive a direction as the thermal ground technology John developed. Time has proven John right; his thermal plane and thermal ground patents will revolutionize the computer industry fairly soon now. As a director of Nisvara, I can't reveal more than that at this time. But if you want a silent computer with no moving parts and even lower power consumption than these "coronal discharge" guys are claiming, get in touch with John Sokol.

I already have a better version working.

[John Sokol]

I spent 3 years from 2002 to 2005 working on a silent computing company, Nisvara. We had offices at NASA Ames, Moffet Field in Mountain View California. It seems like everyone loved what we had, Intel, Sun, ATI, HP, Siemens to name a few. None the less it ended up falling apart.

It's now dead, as one of the people we invited in to help manage thought he would just declare himself the owner just a week before we were to get a $500K grant from the California Energy Commission. When he failed he just trashed the company realizing founders (including myself) were left with nothing. He even managed to get GoDaddy to take the domain out of my name with forged corperate papers, it's been wedged since...

It really breaks my heart. We developed so many very cool prototypes and inventions for cooling computers.

One was using the Ionic Breeze technique to provide just a slight air flow, but it increases the efficiency of the heat sink but a large amount. Problem that they fail to mention is the heatsink really attracts dust, just like the ionic breaze, so you need to get in there with a brush quite often.

Below is a link to many of the prototypes I built. I don't have a photo of the ionic version, but it was just the desktop unit with the large aluminum heatsinks with a plastic duct/ shield was added and a set of fine wires was run across the bottom of the large aluminum heat sinks with -6000V DC on it.
The aluminum heat sinks were grounded.

  Worked great, but you wouldn't' want to stick your finger in there.

Also in the picture are water cooled prototypes, Carbon Fiber "bridges" that had a much higher thermal conductivity then copper and other misc stuff.

  I am planning to add many more photo's, papers, data and schematics and open source the designs at this point...

http://www.silentcomputing.com/i.html

Hey, I worked with these guys!

[LynnwoodRooster]

Igor, Joshua, Rich, and the whole crew at Kronos, over in Redmond. Good bunch of guys...

They've got some innovative takes on the ionic drive, including keeping ozone production WAY down. Also, with proper panel design, you can get some wicked airflow - we were playing with a 12" x 12" x 7" thick multi-stage panel that would move 700 CFM. Yes, that really blows!

One thing to remember is that the voltage required scales with distance. It's on the order of 5 kV/cm, so if you're down to a mm you "only need" 500V to make it work.

And no, you don't want a discharge! Sparking is BAD. Corona effect is to be avoided - you want to operate just below that point, were you get good ion flow from emitter to collector, but no corona to generate ozone, or sparks.

On the whole, if you ABSOLUTELY NEED zero moving parts, this is a good way to go. You can get high airflow AND dust filtration in a relatively compact form factor. But it's not cheap, and getting it UL certified isn't exactly the easiest (although it has been done for some products; I worked with them on a few new products and led their team in a couple of research projects).

Vapourware or b33rware?

[dbIII]

A corona discharge cooler sounds more like something designed to keep beer cold instead. Either that or regulating body temperature by drinking a lot of Mexican beer and urinating.