backtop


Print 44 comment(s) - last by MrPoletski.. on May 27 at 6:32 AM


Ionic Cooling at Work  (Source: MIT Review)
Ionic cooling technology expected to be commercialized next year

Before Sharper Image went defunct, the company pushed its Ionic Breeze air purifier relentlessly through commercials. The big selling point of the product was that it used charged particles to move air without the need for a fan or other moving parts.

MIT Review reports that some researchers are using the same idea for cooling laptops and other electronic devices. Researchers from the University of Washington and a company called Tessera that has licensed the ionic-cooling technology from the university are working on adapting the power of ionic cooling to use in notebook computers.

According to the researchers, the ionic-cooling methods can extract about 30% more heat from a laptop than a traditional fan. In addition to removing more heat form hot internal components like the CPU, lab tests have also reportedly shown that the ionic-cooling method consumes about half the power a fan needs. Any power savings realized in a notebook computer directly increases the run time of the machine.

The ionic-cooler is based on research originally completed by Alexander Mamishev from Washington University. The tech was licensed by Tessera last year and researchers at the university and Tessera have been working to convert the technology into a smaller form that can be used inside electronics devices like notebooks, game consoles, projectors, and servers.

Tessera director of research and development Ken Horner said, "The early work focused on principles. We're now focused on optimizing it and fitting it into small form factors."

MIT Review reports that the ionic cooler developed by Tessera would sit near a vent inside a laptop. Heat pipes would be used to draw heat away from the heat generating components inside a computer and pull the heat towards the ionic-cooling system.

The ionic-cooler itself consists of a pair of electrodes, one of which is an emitter and the other a collector electrode. When voltage is applied between the two electrodes, ions flow from the emitter to the collector pushing neutral air molecules across a hot spot.

One of the biggest challenges for the technology was to create a very small voltage converter that could generate the needed 3,000 volts to power the ionic system. The 3,000 volts of power had to be generated from the notebook's 12v DC power supply.

Engineers were able to devise a suitable power supply that measures only 3 centimeters square from the power supply for a cold cathode fluorescent lamp. A problem still facing the researchers is one of dust. The technology has to be made as impervious to dust as current fans are. The ionic cooling device also has to be made more rugged.

The lifespan of the electrodes is currently not up to the 30,000 hours of life expected from a notebook computer. The researchers are reportedly working with new electrode materials now that are expected to solve the longevity issues with early electrodes. The researchers declined to give specifics on the materials being used due to patents that are pending on the technology.

Exactly how much cost an ionic-cooling system would add to a notebook is unknown at this point. Tessera's Craig Mitchell says that the technology will be ready for commercialization next year and that the cost of the cooler would be in the ballpark of where it needs to be.

Better methods of cooling the internals of computers will be needed for new technologies like the graphene multiplier to come to market with the potential to push CPU speeds higher.



Comments     Threshold


This article is over a month old, voting and posting comments is disabled

No thanks
By MrPickins on 5/21/2009 12:22:42 PM , Rating: 2
Aside from the fact that I'd rather keep free ions away from my electronics, these devices generate ozone. I'm not sure I'd want to be exposed to that every time you use my laptop.




RE: No thanks
By MrPeabody on 5/21/2009 12:34:39 PM , Rating: 5
quote:
I'm not sure I'd want to be exposed to that every time you use my laptop.


Fair enough. I'll use my own laptop, then.


RE: No thanks
By MrPickins on 5/21/2009 12:48:06 PM , Rating: 2
:D

I suppose I should read the preview, huh...


RE: No thanks
By feraltoad on 5/22/09, Rating: -1
RE: No thanks
By ZimZum on 5/21/2009 12:35:07 PM , Rating: 5
I produce my own "Ionic wind" thats far more toxic than ozone.


RE: No thanks
By StevoLincolnite on 5/21/2009 12:43:22 PM , Rating: 5
Thats not a wind, thats a cyclone.


RE: No thanks
By AkuPyro on 5/21/09, Rating: -1
RE: No thanks
By captchaos2 on 5/21/2009 4:39:10 PM , Rating: 1
What did you eat?


RE: No thanks
By nTuX on 5/22/2009 8:12:46 AM , Rating: 2
More like solar wind from Uranus...

... or, should I say, Urectum?


RE: No thanks
By zsdersw on 5/22/2009 8:24:08 AM , Rating: 1
Rectum? Damn near killed 'em.


RE: No thanks
By clovell on 5/21/2009 12:44:48 PM , Rating: 2
Aren't most of those electronics sheilded? This kind of seems like a neat idea.


RE: No thanks
By captchaos2 on 5/21/2009 4:42:08 PM , Rating: 1
Forget shielding, I want the ions to recharge my 2 hr. battery!


RE: No thanks
By mindless1 on 5/21/2009 5:44:28 PM , Rating: 2
No, the exterior of the notebook casing (expensive spray-on, or sheet metal) is the shielding, while this would be inside, and a cooling system has to either have openings for airflow, or 'sink away heat to the shell which would get quite hot.


RE: No thanks
By Shig on 5/21/2009 12:44:54 PM , Rating: 2
Um I think you'll be ok from less than 1 part per million of ozone in your immediate area. Take a chemistry class.

I like this idea, more solid state (no moving parts) technology is always good in electronics. Plus the dust issue won't be a problem in the coming years when they develop nano-tech coatings for electronics that automatically repel dust.

I could also see this kind of technology being used in conjunction with fans or water cooling in a hybrid approach.


RE: No thanks
By MrPickins on 5/21/2009 12:57:11 PM , Rating: 1
I've taken plenty of chemistry, thanks.

Just as a quick reference:

http://en.wikipedia.org/wiki/Ozone#Health_effects
quote:
The EPA has also developed an Air Quality Index to help explain air pollution levels to the general public. Eight-hour average ozone concentrations of 85 to 104 ppb are described as "Unhealthy for Sensitive Groups", 105 ppb to 124 ppb as "unhealthy" and 125 ppb to 404 ppb as "very unhealthy".[27]


I'm not saying you'll die from it, just that it is unhealthy.


RE: No thanks
By v1001 on 5/21/2009 1:03:17 PM , Rating: 4
I got super sick and super fatigued from having one of those Ion Air Cleaners from Sharper Image. As soon as that ozone mixes with other things in your house and the sun from a window hits it it becomes dangerous air pollution.

I will never ever again come near anything like that again. Was sick for months on end until I figured it out. Got rid of it and started feeling better right away.


RE: No thanks
By LRonaldHubbs on 5/21/2009 4:35:10 PM , Rating: 3
That's interesting, because one of my roommates at college had an Ionic Breeze and ran the thing on the highest setting, yet none of us got sick from it. Clearly the effects of being near such a device cannot be rigidly defined as dangerous.


RE: No thanks
By aftlizard on 5/21/09, Rating: 0
RE: No thanks
By aftlizard on 5/21/2009 3:55:08 PM , Rating: 3
Apparently I am wrong judging by all the replies and statistics that accompanied my down ratings.

Oh wait, never mind. There weren't any.


RE: No thanks
By Muskrat Matt on 5/22/2009 3:58:27 PM , Rating: 3
Don't be so sensitive.


RE: No thanks
By MrPoletski on 5/26/2009 9:32:06 AM , Rating: 1
positively biased ionic devices generate ozone, negatively biased ones do not.


RE: No thanks
By omnicronx on 5/21/2009 1:35:52 PM , Rating: 2
quote:
Plus the dust issue won't be a problem in the coming years when they develop nano-tech coatings for electronics that automatically repel dust.
I would imagine it would still require an air intake. Doesn't really matter if the cooling mechanism is passive or active, if there is air passing through the device, there will always be dust.


RE: No thanks
By mindless1 on 5/21/2009 5:47:40 PM , Rating: 2
The funny part is the suggestion that nano-tech coatings would be enough, as if the dust would just magically suspend itself in mid-air yet not create a growing mass that blocked airflow entirely (which is the current problem, not a thin coating of dust on the electronics), so it could be even worse than with no nano-tech coating.


RE: No thanks
By mindless1 on 5/21/2009 5:59:02 PM , Rating: 5
The issue of moving parts, ie - fans, is not much of a problem in computers, the problem is they pinch pennies far too much.

A decent fan will outlast a notebook or desktop's other components. Problem is, they instead use thin, poorly balanced, excessively small, high RPM fans with cheap bearings, then they make the heatsink cheaply too. While ionic cooling could remove the problems, it would do so at a higher expense, an expense which would also solve the problems using existing tech.

In very small notebooks there is the issue of fan size versus turbulence still, it can't help but produce some audible noise but even using a relatively cheap cooling subsystem many laptops are reasonably quiet.

Overall this is a bad idea, it is already known that LCD inverters are one of the more likely early failure points in a laptop (besides physical stress like dropping it or knocking the power cord and socket loose), adding a second such board will be even worse.

If it's not broke don't fix it, high quality fans, even being mechanical, are superior except for a slight size and noise difference. Going passive seems good, till you realize a further size and weight tradeoff if not performance as well.

I'm not suggesting ionic cooling won't have suitable applications but rather a generic concept of replacing fans in typical consumer laptops would not be the solution to existing problems without creating new, more significant problems, plus it's pretty much nonsense what they suggested about a significant reduction in power consumption, the typical laptop fan averages under 100mA current, contrasted by a couple dozen times more by a laptop running at high enough power level to get the fan current average as high as a mere 100mA. The fans may have a label stating more than 100mA, then there's the average versus peak current, then there's the fan control circuit which seldom makes it run at high speed.


RE: No thanks
By SiliconAddict on 5/24/2009 12:25:55 AM , Rating: 2
Umm I beg to differ. I do laptop repair work and I've lost count the number of heatsink and fans I've had to replace because they have been clogged up by dust and debris. The reality is that with the fan its one big ass filter in there. And like it or not fans are moving components and as such is a major point of failure. The fewer moving parts we have in a computer the more reliable they become.


RE: No thanks
By mindless1 on 5/26/2009 12:43:57 AM , Rating: 2
Like I wrote, they pinch pennies on the design/parts, but when you talk about clogging you are talking about insufficient cleaning interval for the environment.

If dust were to clog a fan which by virtue of having moving parts, tends to break up large clumps of dust, given same necessary airflow rate for cooling, the ionic cooler will clog sooner, plus the ions charge the dust so it sticks to things even more.

I agree that in many cases moving parts are a liability for lifespan of the entire system, but at the same time it is true that many of us have fans that have lasted over 10 years which is substantially longer than the typical laptop does with regular use.

Fans also don't tend to break easily merely due to dust and debris, I may have mentioned a few factors in fan longevity like airflow per RPM by increasing the size, then there's a thickness enough that it uses quality dual ball bearings.

As I already wrote, the average lifespan of the invertor boards they're already using in laptops and LCD monitors is shorter than that of a quality fan, with them planning on placing either more load on existing inverter boards or doubling up to have two of them per laptop instead of one, doubling the failure potential of one of the shortest lived parts.

I agree fans are a common failure point in laptops, but you didn't see that I meant the solution is not to replace them with another problematic tech, it's to replace them with high quality design and parts in the fan based cooling subsystem.

A good fan at low RPM may last over 30 years with modern synthetic lubricants that don't harden like old dino lubricants do.


RE: No thanks
By FaceMaster on 5/22/2009 9:19:43 AM , Rating: 2
It's only a B away from Bionic Cooling. We're almost there.


RE: No thanks
By adiposity on 5/22/2009 7:01:46 PM , Rating: 2
I laughed.


RE: No thanks
By MrPoletski on 5/26/2009 9:28:18 AM , Rating: 2
There are two types of ionic wind devices, those which are negatively and those which are positively biased. Positively biased units generate ozone... in fact they are used to manufacture it. Negatively biased devices generate nothing, in fact, providing negative charge to an ozone molecule is a good way of getting it to degrade into diatomic oxygen. The atmosphere does this constantly in the ozone layer, the charge comes from solar radiation (mostly UV)


"It's okay. The scenarios aren't that clear. But it's good looking. [Steve Jobs] does good design, and [the iPad] is absolutely a good example of that." -- Bill Gates on the Apple iPad

Related Articles













botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki