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Wriggling Heat Sinks

chrisd posted more than 12 years ago | from the wow-that-is-just-so-cool dept.

Technology 195

YourHero writes "Purdue researchers have come up with a new way to cool chips, in about 2 years. Just build a bunch of little piezoelectric fans (the waving kind, not the spinning kind). Since they don't spin, no bearings, less self-generated heat. Since they don't have magnets, no electromagnetic noise problems. And, of course, super-efficient. A press release and abstract for your reading pleasure. Formal presentation at THERMES 2002 Jan 15th."

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195 comments

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Wow! (-1, Offtopic)

michael.creasy (101034) | more than 12 years ago | (#2702881)

Cool!

Re:Wow! (0, Flamebait)

Soko (17987) | more than 12 years ago | (#2702906)

Cool!

Ummmm...I thought that's the general idea, dude.

Soko

Why not just make cooler running chips? (-1, Redundant)

qurob (543434) | more than 12 years ago | (#2702882)

Quieter, less power consumption, less cooling issues!

Re:Why not just make cooler running chips? (2)

reverius (471142) | more than 12 years ago | (#2702896)

The same reason cars use gasoline instead of electric or battery power.

Re:Why not just make cooler running chips? (2)

2nd Post! (213333) | more than 12 years ago | (#2702927)

Um... because gasolene has a higher energy to density ratio than steam or conventional batteries?

Or are you trying to say that making cooler chips is too difficult?

Re:Why not just make cooler running chips? (0)

Anonymous Coward | more than 12 years ago | (#2702975)

Yeah, basically. Gas cars are more powerful than equivelent electric ones.

Making cool but still fast chips is harder (and more expensive from a R&D standpoint) than simply making hot and fast ones.

Uhh, how do you think you do that? (1)

Spinality (214521) | more than 12 years ago | (#2702902)

You say make cooler running chips? Good idea.

So let's come up with better technology that lets them run cooler. Hmm... Smaller geometry? Good! Lower voltage? Good! Better logic design? Good! And how about... better cooling technology? Good!

Look back through the history of circuit design and you'll see lots of new innovations that either reduced power or improved thermal transfer. Now I'll admit that little feathers seems kinda wacky, but on the other hand as electronic components start to mimic natural systems (cf. hairs, cilia, feathers) they are probably taking an efficient path.

Re:Why not just make cooler running chips? (2)

rodgerd (402) | more than 12 years ago | (#2702920)

You can get them now. ARM CPUs, for example. If you're willing to stick at a 233 MHz CPU.

Re:Why not just make cooler running chips? (4, Insightful)

Xoro (201854) | more than 12 years ago | (#2703121)

I've been looking into this a lot recently, and there's some pretty (ahem) cool developments on the cpu front recently, with x86 architectures.

Some people point to the VIA C3-800, but if you have real computing needs, steer clear. It runs comparable to a Celeron 400, which is almost, but not quite adequate for general computing. Instead, check out the old reliable suppliers. The shift to .13u means a lot. Frequencies are so high and chips are so powerful that underclocking has become a real option. A good general target for fanless operation is about 12 watts. You can go higher with good case airflow, or lower if you're dealing with troublesome ambient temperatures.

Right now, you can take the Intel Tualatin pIII 1.13GHz (28W), cut the bus speed to around 100MHz, cut the voltage down to about 1.1v and be right in the target range. Of course you won't know exactly w/o experimentation on your cpu, but it *should* be doable. If you're worried about losing efficiency to bus speed, remember that you can compensate by running it on one of the PIII DDR chipsets that are now available (upping effective bus speeds to 200MHz) or waiting until February, when Intel says they'll release a similar part themselves. Additionally, the 512k (vs 256k) cache on the pIII-s will offset lower bus speeds. Just check out the specs of the PIII-M LV models at developer.intel.com and ask how they got to those low wattage numbers with the same core. Since the last fanless G4 was 400MHz and claimed (in its wildest fantasies) to be a supercomputer twice as fast as a pIII, a fanless 800MHz pIII is not insignificant.

Even better, surprise, is AMD. The current mobile palomino runs at 1.1GHz, 1.1v, 25w. This is clearly just an underclock of the current 1.75v desktop XPs. But what it tells you is that the AMD architecture is very open to undervoltage at lower clock speeds.

Now if you consider AMD's forthcoming die shrink, things really look good. Zdnet.de reported (unsourced) that the Athlon 1.73GHz processor would drop from about 75W to 45W after the changeover. Depending on how far you could drop the voltage, you could be looking at a 1-1.2GHz part running at about 10W! Fanless! Now imagine (a beo..no) 2 of these in a well ventilated case, with an MPX board -- 2GHz of dead silent AMD power! Wooo!

Alright, I'm calmed down. Back to your original point. It's really a shame about the alternative architectures. Every time I think of venturing into the embedded market, I get brushed off by the 2x price, 1/2x power rule. But since the ARM and PPC don't seem to be generating any economies of scale, at least mainstream processors are progressing fast enough to make cool, cheap and fast a real alternative.

Re:Why not just make cooler running chips? (5, Insightful)

TeknoHog (164938) | more than 12 years ago | (#2702945)

Why don't you just propose a design for such a better chip? I thought so.

Half seriously, though, you might think of superconducting chips to eliminate the heating due to the resistance in aluminium/copper wires. But AFAIK you can't build logic circuits entirely out of superconductors. The siliconductors (sic :-) we now use, require current to pass through potential differences (energy gaps in the crystal structure). Power dissipated equals current times potential difference, period. And there are lower limits for the voltage imposed by the semiconductor used.

Until we get something entirely different, I'm quite happy to put my geekineering effort into the design of better cooling. I'm sure it can be almost as fun as inventing new kinds of logic chips.

Re:Why not just make cooler running chips? (2)

Phroggy (441) | more than 12 years ago | (#2703149)

PowerPCs are cooler running chips.

Or did you mean cooler running IA-32 chips that can run Microsoft Windows?

Quiet (1)

Null_Packet (15946) | more than 12 years ago | (#2702883)

This is great! The best thing is the opportunity for ultra-quiet CPU and power supply fans for the pc. This means the drive is the last noisy component! It's good to be a geek.

Re:Quiet (1)

qurob (543434) | more than 12 years ago | (#2702891)

Once me move to solid state storage, a la Holograms or some kind of RAM card, we'll only have noise coming from our optical drives.

Re:Quiet (-1, Flamebait)

Anonymous Coward | more than 12 years ago | (#2703047)

It's good to be a geek.

Did you mean "It's good to be easily amused."? Thought so.

Re:Quiet (1, Insightful)

Anonymous Coward | more than 12 years ago | (#2703129)

Power supply fan? Floppy drives? CD-ROM/DVD/Burner drives? Monitor? (They make noise) Printer? Keyboard? Mouse? (Unless you have a cool cordless optical one like mine.) And even then, your soundcard will still make noise. Even when you don't want it to, there is background hiss if you amplify a muted soundcard noise too much.

Do they work under palm trees... (-1, Offtopic)

slowhand (191637) | more than 12 years ago | (#2702884)

Or peel grapes. I have this vision of a robor slave girl, cooling me by waving her piezo fans...

Re:Do they work under palm trees... (-1, Troll)

Anonymous Coward | more than 12 years ago | (#2703115)

You are gay, therefore you prefer slave men. Eww, fucking faggot!

That new invention (0, Redundant)

Rosco P. Coltrane (209368) | more than 12 years ago | (#2702895)

is very cool.

Other uses (-1)

uninerd (79304) | more than 12 years ago | (#2702897)

I wonder if we could make clothes out of this, for hot weather. Perhaps self-mixing drinks?

And my post 11:18 about IT on Leno is stalled ... (-1, Offtopic)

slowhand (191637) | more than 12 years ago | (#2702903)

Tune in to Leno NOW! See Leno, Crowe, and Kamen riding IT/Gingers, and waving peizo fans.

bye bye (2, Funny)

MrGHemp (189288) | more than 12 years ago | (#2702911)

sounds like you'd just be waving the heat bye bye

Hotter than the SUN?! (2, Interesting)

EvilBuu (145749) | more than 12 years ago | (#2702914)

"The concentrated circuits in a semiconductor computer chip can generate more heat per square centimeter of chip area than an area of equal size on the sun's surface."

Is this true? If so I have so much more respect for my heatsink....

Re:Hotter than the SUN?! (2)

roystgnr (4015) | more than 12 years ago | (#2703005)

Well, the Sun's putting out about 1.4 kW/m^2 at the Earth's radius (around 160e9 meters), and the Sun's radius is around 1.4e9 meters, so the Sun's output at it's surface should be about 1.4 * (160/1.4)^2 = 18300 kW/m^2 = 1830 W/cm^2.

I found a cool .pdf [intel.com] with the Watts/cm^2 values (on page 8; thanks, Google!) for Intel's CPUs up to the PIII, and apparantly the PIII's only at 40 W/cm^2. It's got all sorts of neat past milestones (hot plate) and future goals (nuclear reactor, rocket nozzle, even the Sun's surface, at about where my math claimed) to strive for.

Trick questions (5, Interesting)

freeweed (309734) | more than 12 years ago | (#2703037)

Or rather, answers in this case. You commonly hear things like 'this is hotter than the surface of the SUN!!!' like it's some huge temperature. In reality, what is considered the 'surface' of the sun is only a few thousand degress (still pretty hot, but not THAT hot). It's the extreme lower depths, and especially the upper 'atmosphere' of the sun that is hot - in the range of millions of degrees.

Re:Hotter than the SUN?! (1)

groove10 (266295) | more than 12 years ago | (#2703038)

Not True! The Pentium 4 generates about 25W/cm^2 while the sun generates about an order of magnitude more powere per unit area (634W/cm^2). This is assuming that my calculations are correct.

Re:Hotter than the SUN?! (1)

senine (513587) | more than 12 years ago | (#2703050)

ahem...

first: AMD chips run hotter than intel.

second: what about certain milspec resistors? I'm not even going to mention high-power microlasers that are shipped with built-in peltiers...

Ameoba (0)

Anonymous Coward | more than 12 years ago | (#2703181)

Pound for pound the Ameoba is the most fearsome killer ever devised...

Well, atleast that's the old saying, I think a virus (not outlook type) might be smaller.

electomagnetic noise.... (1, Informative)

Anonymous Coward | more than 12 years ago | (#2702917)

the fact that there are no magnets has nothing to do with the electromagnetic noise..

Linux (-1, Troll)

Anonymous Coward | more than 12 years ago | (#2702922)

Does anyone have the troll(I'm not sure if it was posted more than once) where a conversation about women results in a linux geek asking if they run linux?

Re:Linux (-1)

Fecal Troll Matter (445929) | more than 12 years ago | (#2702931)

Linux sucks.

Re:Linux (0)

Anonymous Coward | more than 12 years ago | (#2703151)

I believe it was just a transcript of the Monty Python "nod, nod, wink, wink" bit, but rather than saying at the end "wot's it like?" they said "Do they run Linux?", as I recall.

Still need Whirly-Birds (2, Informative)

miracle69 (34841) | more than 12 years ago | (#2702923)

The innovative fans will not replace conventional fans. Instead, they will be used to enhance the cooling now provided by conventional fans and passive design features, such as heat-dissipating fins.

Oops. Looks like the editor didn't read the article....

Does this surprise anyone?

Re:Still need Whirly-Birds (0, Flamebait)

irony nazi (197301) | more than 12 years ago | (#2702951)

Can somebody please enlighten the irony nazi as to why electromagnetics are noisy?? Granted that I don't have much experience with electromagnetics, but the 90 in 1 Science electric kit that I had when I was a kid made absolutely NO noise, even when making the electromagnetic experiments.

I even saw a electromagnet on a crane once pick up a large car. I don't remember any noises involved (except for the crushing car).

Yet, the article mentions that electromagnets are noisy???

Re:Still need Whirly-Birds (2)

plastik55 (218435) | more than 12 years ago | (#2702979)

Yeah. Hook a big electromagnet to your house mains and wave it at your hard drive. Not only will it hum audibly when connected to AC current, but when you try to read your data you will find out first hand about electromagnetic noise.

Now imagine a fan with rapidly spinning and switching magnets sitting on top of a next-generation CPU with such a fine process that only two or three electrons constitute the difference between a "1" and a "0". Are you beginning to see the problem?

Re:Still need Whirly-Birds (1)

Phork (74706) | more than 12 years ago | (#2703088)

i think you are failing to understand the term "electromagnetic noise," the noise that he is refering to is not audio noise, its electromagnetic noise, it is RFI(radio frequency interference) and stray magnetic currents.

Re:Still need Whirly-Birds (3, Insightful)

ForWhomTheHellTrolls (543770) | more than 12 years ago | (#2703033)

The only way I wont be surprised is if we dont see a repost of this tomorrow

They should make them self-cleaning too (2, Insightful)

night37 (543185) | more than 12 years ago | (#2702929)

It would be nice if they made it self-cleaning too. Those things accumulate a lot of dust. I use my dad's 5.0HP shop vac to clean the ones I have. It makes a loud ZZZZZZZZ and sucks the dust right out of there! Sounds like that would break one of these. Neat idea though. :D

Re:They should make them self-cleaning too (2)

Phroggy (441) | more than 12 years ago | (#2703126)

You'd probably use cans of compressed air...

Heat sink (-1, Troll)

Anonymous Coward | more than 12 years ago | (#2702930)

Does CmdrTaco use this to cool down after having hot, sweaty mansex with a neighborhood Negro whore?

RPGs suck me dry (-1)

BankofAmerica_ATM (537813) | more than 12 years ago | (#2702933)

Why oh why are you celebrating games that were written by some 13 year old Japanese schoolgirl on ecstasy? I don't read fucking books where unicorns prance around with Big Bird, why should I play a game that does?

When you choose to purchase a Square game, you are killing gaming by encouraging masturbatory CGI fests and repetitive, no-skillz gaming that will put the nail in the coffin of decent gaming eventually.

Box office limpy Final Fantasy: The Spirits Within represented a nadir for video games everywhere. It completes Square's degeneration from a fresh video game developer with new ideas to another maker of incomprehensible sci-fi bullshit.

Don't mistake Square's creations as "literary" or "cinematic." They have simply cribbed the worst plots from Saturday morning cartoons, added spikey hair and big blue eyes, and you fucking geeks fell for it! You're paying $50 to play the video game equivalent to "Birdman," which you can see on Boomerang for free.

So in conclusion, get a fucking life and stay away from Square. If not all good video games (Sega, Nintendo, Konami) will die. Good night.

awe come on... (5, Funny)

spacefem (443435) | more than 12 years ago | (#2702938)

Doesn't anybody think it's cool to be noisy anymore? I mean, say what you will about being distracting and all that, but I'd love to impress my friends with a PC that sounds like a lawnmower. it's POWER! it's TOUGH! it's AMERICAN!

sometimes worrying about things like noise is too girly, even for me.

Re:awe come on... (1)

scumdamn (82357) | more than 12 years ago | (#2702943)

There are countries that put much more emphasis than we do on the noise level of their computers. Japan especially is sensitive to the noise their systems make.

Other than that, though, they're more efficient. Isn't that reason enough?

Re:awe come on... (-1)

Anonymous Pancake (458864) | more than 12 years ago | (#2702960)

I have to agree, the Japanese are very efficiant. That is why they make better cars, better computers, and generally better everything than lazy american workers.

Re:awe come on... (-1, Offtopic)

Anonymous Coward | more than 12 years ago | (#2703207)

SubtleNuance, is that you?

Re:awe come on... (2, Interesting)

EvilBuu (145749) | more than 12 years ago | (#2702961)

Well, you can still have your 65dB Swiftech heatsink/fan, and your multitude of 80mm case fans and maybe a water pump for your overclocked GeForce3, but imagine if they put these on the fins of that heatsink. Not only would the surface area of the sink double or triple or more, but the heatsink would actively cool itself. That would bring your cpu die temp down another few degrees for sure, with barely any more sound, or power.

Re:awe come on... (1)

senine (513587) | more than 12 years ago | (#2703043)

I dont think I want the swiftech cooling my cpu to be waving around inside my case at the tips of some sissy waving fins.

Re:awe come on... (1)

jred (111898) | more than 12 years ago | (#2702986)

If it's too loud, you're too old!!!!

Sorry, I couldn't resist :)

Linux (-1, Redundant)

Anonymous Coward | more than 12 years ago | (#2702941)

I'd like to see a beowulf cluster of these running on an overclocked linux box.

Re:Linux (-1, Flamebait)

Anonymous Coward | more than 12 years ago | (#2702984)

You are a fucknut.

Piezoelectric fans are already available (4, Informative)

Harumuka (219713) | more than 12 years ago | (#2702944)

At least from Piezo Systems Inc. [piezo.com] in Cambridge, MA. Their specs are worth reproducing:
  • Input Voltage: 115VAC, 60 Hz
  • Capacitance: 15 nF
  • Power Consumption: 30 mW
  • Volume Flow Rate: 2 CFM, (0.9 l/s)
  • Peak Air Velocity: 400 FPM, (2.0 m/s)
  • Weight: 2.8 grams
  • Mounting: #2-56 clr. holes, 2 places
  • Temperature Range: -20 C to 70 C
  • EMI/RFI: None

However, they're not cheap. Pricing starts at $149. Additionally there is a Piezoelectric Resonant Blade Element [piezo.com] . Interesting stuff. Hopefully mass production of piezoelectric fans will lower their price to the average customer range.

Re:Piezoelectric fans are already available (1, Informative)

Anonymous Coward | more than 12 years ago | (#2702968)

Ouch. But, considering that you'd need 20 or so of those to replace a single conventional fan in flow rate, you'd be able to get their bulk prices. Then, they're only $49 each (or roughly $1000 per conventional fan).

Re:Piezoelectric fans are already available (2, Informative)

Harumuka (219713) | more than 12 years ago | (#2702995)

Ouch. But, considering that you'd need 20 or so of those to replace a single conventional fan in flow rate, you'd be able to get their bulk prices.
Not a bad estimate. Considering computer fans typically move 20-30 CFM, although high-end [coolerguys.com] fans which blow more than 50 CFM), you would need 10 to 15 piezoelectric fans to achieve equivalent volume air flow. In 5-24 quantites they cost $79, so that translates to $790 to $1185.

Of course, laptop manufacturers could buy in bulk (100+) easily at $39. $390 to $585 per fan, significantly less.

Yet, according to the article these are novelty fans. If it costs manufacturers $149 per novelty fan, I wonder what the "real" thing costs...

Re:Piezoelectric fans are already available (1)

quantaman (517394) | more than 12 years ago | (#2703184)

you would need 10 to 15 piezoelectric fans to achieve equivalent volume air flow...

Of course, laptop manufacturers could buy in bulk (100+) easily at $39. $390 to $585 per fan, significantly less.

Just how big is your laptop?

Re:Piezoelectric fans are already available (1)

abolith (204863) | more than 12 years ago | (#2703214)

Of course a mere $500 to $600 bucks for a fan that does exactly what my current 50 dollar one does. sorry but the noise and other issues just don't cause enough of a headach to make me go and spend that much. hell thats as much or more than my WHOLE SYSTEM costs. damn! if my processor takes a dump because i have it undercooled than i'll spend the 200 bucks to buy a new one plus a better heatsink/fan combo.

not worth it even for the "coolness factor"

Not a problem (-1)

Anonymous Pancake (458864) | more than 12 years ago | (#2702946)

I dunno about most of you, but I can live with a fan or two in my pc.

When computers were new, it took huge air conditioning systems just to keep the systems from breaking down. Just the maintenance costs were staggering. Nowadays, all we need is a little fan to keep the cpu cool.

Lets not take things like this for granted!

Time to revise the overclockers manual (5, Funny)

Henry V .009 (518000) | more than 12 years ago | (#2702953)

This is just an excuse for designers to make CPU's less efficent and more power hungry.

Imagine

Washington Post: Dec 13, 2018. Details are now emerging about the accident that irradiated much of Germany on Tuesday. Nothing is as yet confirmed, however, initial reports indicate that a heatsink was somehow removed from an AMD processor (PR rating 10,000,000). A bizzare terrorist group with the initials THG may have been involved. Containment was lost, and critical mass was reached almost immediately. AMD representatives have issued a statement in the wake of the carnage: "Obviously, they were using an improperly designed motherboard."

MOD THIS UP AS FUNNY (-1, Redundant)

Anonymous Coward | more than 12 years ago | (#2702956)

Ditto

MOD THIS DOWN AS OFFTOPIC (-1, Offtopic)

Anonymous Coward | more than 12 years ago | (#2703216)

Mod parent down!

Re:Time to revise the overclockers manual (-1)

Anonymous Coward | more than 12 years ago | (#2703072)

0VAR|L0|1N6 SI NOt A CR1^^3 YUO FASHITS!!

why AMD? (0)

Anonymous Coward | more than 12 years ago | (#2703193)

Doesn't intel run hotter Mhz for Mhz?

Or even power for power (power not being voltage, I mean benchmark ratings)?

Piezo fans? Old hat. (4, Informative)

FFFish (7567) | more than 12 years ago | (#2702957)

Here's a picture of an old-style piezo fan [piezo.com]

You used to be able to buy piezo fans for the old Mac Classic [acornworld.net] (read the list near the bottom of the page).

IOW, piezo fans have been around since the mid-to-late 80's. Now, yes, I'll admit that they weren't very efficient (as in, they didn't move a lot of air)... but the concept has been there for eons.

Re:Piezo fans? Old hat. (0, Offtopic)

red_crayon (202742) | more than 12 years ago | (#2703094)

Whadyou expect? This is Slashdot!

Cooler (3, Insightful)

Random Feature (84958) | more than 12 years ago | (#2702970)

I don't mind the noise, but dissipating heat in general would be a good thing.

The thing they need to do is make chips that run cooler. And yeah, Crusoe's do run cooler but they don't perform optimally in a task-switching environment.

Cooling the CPU is fine, but the heat has to go somewhere and a better solution is to go back to the drawing board and figure out how to reduce the heat output in the first place. PLEASE.
----

Re:Cooler (1)

jred (111898) | more than 12 years ago | (#2702999)

How about harnessing that heat somehow. It seems to me that the problem isn't the heat, it's the energy waste. Like maybe hook your water-cooling setup into your water heater or something.

Although I do generally tend to sneer at "green" houses that basically just do that.

Now that I think about it, there was a project to turn your pc into a still, but the link http://exaflop.org/docs/x86still/ doesn't seem to work.

Old school fan uprising!!! (3, Funny)

BigBir3d (454486) | more than 12 years ago | (#2702971)

What are the chances of the conventional ball bearing fans, in the very computers that are doing all the mathematical modeling, will go on strike??

Self-preservation is quite a motivator.

Re:Old school fan uprising!!! (1)

TeknoHog (164938) | more than 12 years ago | (#2702985)

If I were and old mechanical fan, I'd be glad just to be able to lie down while the oriental robot chicks wave their piezo-fans for me.

Sklyarov is free! (0, Offtopic)

FatAssBastard (530195) | more than 12 years ago | (#2702982)

And Slashdot is the only place that doesn't have it [usdoj.gov] .

Nothing New (2, Informative)

pcjunky (517872) | more than 12 years ago | (#2702987)

I have had one of these fans cooling my sterio for years. I got mine as a sample while working for a crystal manufacurer in 1984. It makes VERY little noise but does not even begin to move enough air to cool a modern CPU. These new ones would have to be 10 times more powerful.

Air Flow (2, Insightful)

ruvreve (216004) | more than 12 years ago | (#2702996)

I didn't see any specs as to the rate of air flow these things can produce. Assuming they are optimized given the 'provided' mathematical models. Any chance these models are as easy to understand as the instructions they put on coke cans?

The article stated that these fans could have blades up to an inch long, anybody have any opinions on whether this could replace the large fans in cars that are used for air flow over the engine and radiator? This would make working on your car while it is still running a little bit safer. But of course the saying "Make something idiot proof and somebody will make a better idiot."

And since the topic of energy consumption was brought up, how about using these instead of ceiling fans in our homes. Being that I have never seen one of these in action I bet you could make them look aestically attractive at least to us nerds. Sort of like having a huge rack of all black stereo equipment.

Re:Air Flow (-1)

Anonymous Coward | more than 12 years ago | (#2703002)

two words:

Karma Whore

OMG - Where is Egg-Troll (-1, Troll)

Anonymous Coward | more than 12 years ago | (#2702997)

I'm having a bad day - its been at least 24 hours since I read one of Egg trolls will crafted and insightful trolls!

Does anyone know where egg-troll got to? Maybe he is saving it up for troll tuesday (which comes after crapflood /. about .au monday) - I jsut hope he has not been bitch slapped/ ipbanned.

It is I... (-1, Troll)

Anonymous Coward | more than 12 years ago | (#2703035)

It is I...Egg Troll, and it seems to me you need a good ass reaming. Would you like to use shit, blood, or axel grease as lubricant?

Old News? (0)

Anonymous Coward | more than 12 years ago | (#2702998)

I swear I heard about this at least a year ago. It seems like it was in New Scientist.

Yeah, right... (0)

Anonymous Coward | more than 12 years ago | (#2703000)

Piezo fans, while a neat concept, are powerful weak.

The day a Piezoelectric fan outblows my screamin' black-label Delta 60x25 is the day Boeing demonstrates a transatlantic 300-passenger ornithopter.

Re:Yeah, right... (1)

finity (535067) | more than 12 years ago | (#2703100)

Now that's a cool idea. Hook one of those big fan jet-engines from a boeing to you computer ;-)

2 years? (4, Funny)

minusthink (218231) | more than 12 years ago | (#2703003)

Purdue researchers have come up with a new way to cool chips, in about 2 years.

I don't know what kind of chips these researchers are using, but the kind I use build up heat a lot faster, and thus need to be cooled constantly, not just every two years.

lame jokes brought to you by:

I need a heat sink (-1, Offtopic)

Anonymous Coward | more than 12 years ago | (#2703014)

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I know many of you have thought of this but for whatever reason kept it locked
away in your to do fantasy list.

My husband is adventurous and enjoys risk; I on the other hand am very ethical
and conservative for the most part. However periodically I get hyper-horny and
will try anything honestly I feel like a lustful man trapped in this tight
female body. And when one of his fantasies is introduced during my hyper-horny
cycle - look out! Charlie (my husband) took me shopping. I know when he does
this that he's trying to buy my affection so that I will reward him with sexual
favors (I trained him well) so after buying everything on my wish list I asked
him to pick something out for me to fashion tonight because we were going out on
the town. I whispered in his ear, "I'll wear anything you desire". He's has
great taste in clothes but borders he the line with Cheap - when he's horny. In
other words he likes me a little on the trashy side. I got my nails done and
hair styled and took full advantage of his finances.

Later that night -

I walk into the bar with a short black skirt, heels and a sheer see-through
black sleeveless top. Underneath I'm wearing a tight see-trough latex body slip
and absolutely no underwear of any kind. Men are so easy and I knew the women
would hate me and the men would lust. I felt sensual and exotic to a point of
pornographic with my new attire so what did I care as long as my man is happy. I
was getting wet thinking about sex and thirsting for something between my legs
to stuff my hole. Charlie was proud of me and paraded me like he won a prize and
I was the reward so I played the role to a tee. He gets aroused when other men
lust after me and I know this man would love to see me get fucked by a strange
cock in the heat of passion but only when he's obsessed with lust and I'm a
nymphomania hot bitch.

We sat across from one another at the table and my black skirt barely covered my
legs exposing my naked thighs so I crossed my legs and elevated my breasts in a
straight posture. After a few drinks the alcohol was taking it's affect on the
both us since we didn't normally indulge in alcoholic beverages. I noticed the
bulge in Charlie's slacks and that he was prepared to jeopardize all his morals
for this erotic fantasy. The daring thought of his untamed talks made me wet
causing multiple orgasms while he shared one fantasy after another. I was
getting frigidity crossing and opening my legs just the feel of my inner thighs
was causing a tingling sensation throughout my body. I took deep breaths and
moaned quietly to help relieve my pornographic hunger. I noticed the man sitting
behind Charlie couldn't take his eyes off me and watched diligently every move I
made and his date was getting very angry. I felt naughty so I taunted him a
little while flirting with my husband by widening my legs to feel the bar breeze
caress my swollen vulva. I was so wet! His reaction was driving me crazy and now
Charlie knew what I was doing and he said, "Do you like teasing other men as
much as I enjoy watching?" I replied, "He's been staring at me since we sat down
so I thought I would give him something to dream about because what I have is
only for you babe". And I reached under the table to stroke my husband's
erection with a dirty sensual smile. Charlie said, "Rub your pussy with the tip
of your fingers and give me a taste". I closed my eyes and followed his
instructions the sensation was overwhelming and heavenly I could almost scream!
I opened my eyes to watch Charlie suck my fingers like a newborn babe. I brought
both legs together and tightened my posture feeling the sensation of another
orgasm. In the worse way I wanted Charlie's cock in my mouth - I love to wrap my
tongue around his thick cock.

I noticed my voyeur was alone and dominated by my performance. I told my husband
who suggested I should reward him for his perseverance. "What do you suggest I
do?" I replied. He said, "Surprise me you slut". Being called a slut caused me
to shiver with a tingling sensation. I was ready to fulfill all his fantasies.
All I could think of was dick - I needed dick and I was so hyper-horny! My eyes
locked onto to the voyeur as I walked slowly over to his chair. I stood in front
of him without saying a word (I was afraid if I said anything that I would
mutter from the affect that the drinks has caused) The voyeur touched my leg and
slide it slowly up - up - up to my inner thigh and turned to caress the back of
my ass with the palm of his hand. I was frozen and closed my eyes with a gentle
moan. I was in ecstasy and he slowly moved around my pussy without making
contact - I could of cried and hungered for the touch. I looked over and Charlie
smiled with approval so I reached down to grab his bulge and gave him a kiss on
the mouth. His hand elevated to my wet pussy - finally - I descended and locked
his hand on my pussy by clamping my legs together. My body rushed with
excitement; I had never done anything close to this in my life but the risk was
overwhelming making me out of control with lust. I didn't care what Charlie was
doing I wanted this man inside of me - NOW. I cried softly in his ear, "Fuck me
- please fuck me." He said, "Let's go get a room". I asked him to wait. I went
back to Charlie and asked if he would come to instruct me?

All three of us entered the room together and immediately Charlie took his pants
off in the chair and stroked his cock. "Come and suck this babe". I slowly and
teasingly strolled over to him licking my lips and down on him I went with my
mouth wide open devouring his erection as I have done so many times before. I
was thinking how delicious it was when suddenly I felt the stranger's hands on
my butt lifting up what was left of my short black skirt covering my ass. I
could hear him unzip his pants and suddenly he was guiding his hard cock right
into my unadulterated pussy. I could feel the throbbing head of his cock in my
pussy and I lost complete control. The thought of two cocks in me at once was
exhilarating! I moaned and cried with pleasure listening to Charlie telling the
stranger what a good lover I was and how sweet my pussy tasted. Instructing him
to fuck me harder deeper and faster. Calling me names while I was lost in this
lustful passionate adventure. I suddenly felt an explosion of hot juices in my
cunt and then in my mouth! I was soaked at both ends of my body - but the taste
was fantastic! I slurped every drop of hot cum and the stranger removed his cock
from my cunt I turned and thanked him asking him to leave his number on the
table. He said, "Anytime Lady - just call and I'll be back in a heartbeat -
that's one hell ova wife you go there." He left the room and Charlie and I
continued on all night fucking each other until daybreak. But we have never
discussed the evening since that night. But I often look at the number just
waiting for Charlie's instructions...I never got his name? I get wet at the very
thought of the evening we had. At least now I know what I want for my birthday
gift!

Re:I need a heat sink (-1, Troll)

Anonymous Coward | more than 12 years ago | (#2703098)

Come on man, can't you be more original? I though it was going to end with her shitting on the guy or something. What a gyp.

- i have sex with retarded kids
(banned, but finding free proxies to be useful!)

Answer: what is piezoelectric? (5, Informative)

Jucius Maximus (229128) | more than 12 years ago | (#2703015)

For those who are unaware, piezoelectric crystals are items that will change shape under the application of an electric field and/or generate a potential difference (i.e. a voltage) when squeezed.

They're used in inkjet printers - they're in ink some cartridge when an electric field is applied to them and they change shape, forcing the ink out of the I also hear the they used them in the ipod for some sort of playlist control mechanism.

yippee (-1, Offtopic)

Sk3lt (464645) | more than 12 years ago | (#2703020)

That is so cool now we will buy a computer and only to have a even more powerful computer be released the next day.

Big fans and ducting is the way to go... (2, Interesting)

TrouserPenguin (542511) | more than 12 years ago | (#2703022)

I'd much rather trust my components to one large, well made fan with some intelligent ducting inside the case to deliver the air flow where its needed. I think this is one area where some of the big system manufacturers still have a big advantage over a typical 'roll your own' case. Small cooling devices are just too fragile and unreliable, and multiple points of failure are unacceptable, especially in server applications IMHO.

You have no idea (1, Insightful)

Anonymous Coward | more than 12 years ago | (#2703039)

I just love it how these 13 year olds spout off shit to try and increase their karma.

I'd much rather trust my components to one large, well made fan... and multiple points of failure are unacceptable, especially in server applications IMHO.

Every fucking server that I have worked on has at least 5 good quality fans. The compaq prolients that I'm working on now (quad Xeon's) has 2 power supply fans, two CPU fans, two fans over the PCI slots and an extra ventalation fan. All hot-swappable, all redundent.

I don't give a fuck how large your fan is, if it fails, you are fucked.

This is why real servers have multiple fans (even if it means muntiple points of failure)

Re:You have no idea (1)

TrouserPenguin (542511) | more than 12 years ago | (#2703079)

Gosh dude! Take a Prozac. Sounds like you are having a rough day. I was actually thinking of the HP Netserver E40's we run Novell on and how much better I feel about them than I do about the built-from-local-parts Athlon system I built to replace a failed Exchange server. I keep seeing it going up in smoke in my dreams like the first one did when the CPU fan failed. I have yet to have one of the main fans fail on one of the HP's. Even the older Netserver 6/66's that I have converted to Linux after they were retired have never seen a failed main fan. Not all servers are huge multi-processor beasts with redundant systems. Sorry, haven't been 13 in many years... Try to get some rest. Drink a beer.

Re:You have no idea (0)

Anonymous Coward | more than 12 years ago | (#2703186)

Wait until you see an Itanium server. More fan than computer.

Re:Big fans and ducting is the way to go... (2)

A Commentor (459578) | more than 12 years ago | (#2703067)

Great, a single point of failure sounds SO much better that having redundant fans....

In manufacture of computers (0)

Anonymous Coward | more than 12 years ago | (#2703053)

If any company uses them in the manufacture of computers, I belive Apple will.

Perhaps this technology will show up in a new Powerbook or iBook. I have heard that the new Powerbooks often get too warm and the titanium shell does not help much either.

The new flat panel iMac could probably use them too.

Re:In manufacture of computers (0)

Anonymous Coward | more than 12 years ago | (#2703101)

The FPiM will use convection. No need for fans of any type.

Notebook HD...no fan.
Micro form-factor CD w/slot-feed...no fan.
Motherboard and panel both vertical...no fan.

All the heat goes out the top vents...just don't tilt it all the way back or lay it down when in use, ok?

However, large plasma displays can benefit from this type of technology.

Oops (0, Offtopic)

RodeoBoy (535456) | more than 12 years ago | (#2703060)

Is that drool on my shirt.

cooling by piezo-electric cilia (5, Interesting)

xeno (2667) | more than 12 years ago | (#2703077)

Ok, I just got this be-yoo-t-ful image in my mind:

Imagine the piezoelectric fan on a larger scale, not just waving a metal+ceramic blade (single flexible surface area), but creating an undulating sheet about the size of a letter/a4 size piece of paper using stripes of piezoelectric flexion areas that create a wave every 2-3cm. Now combine this with the latest in flexible printed circuitry top and bottom (or 2 layers top and bottom, for the really adventurous). I'd imagine you might also need periodic non-flexible stripes (ends?) for components and connects that can't be made flexible. Then add a lower-power processor and put it into an enclosure only slightly larger than the wave height, such as, say, a laptop computer housing. What do you have?

You'd get a motherboard that cools itself by cilia-like swimming/undulation movement that pushes air (against the enclosure) across its surface silently.

You'd get quieter rackmount systems, with 1U or "blade" servers that self-vent. ("Ah, yah need tah balance yer server there, buddy, the blades are outta sync.")

You get a laptop that you might enjoy putting in your lap. (On second thought, I'm not sure I want to sit next to someone on a plane with a two-stroke laptop...)

just my $0.02
-Jon Espenschied

Re:cooling by piezo-electric cilia (2)

FFFish (7567) | more than 12 years ago | (#2703182)

LOL! That's brilliant. But why hide it in the case? Put it up on the wall, make it a component of some funky water fountain or light fountain, suspend it from the ceiling... it'd be too pretty to just stuff in a bland box!

this has been done before (0)

Anonymous Coward | more than 12 years ago | (#2703085)

One engineer I know told me of such a scheme about 10 years ago, maybe longer.

I'm posting this as AC because I don't know if he was supposed to tell me and therefore if I am supposed to tell the world.

He was a contract engineer, and the team he was on came up with the idea of using pezioelectric fans.

I don't know if they bothered to patent it or what, but I do know it's been done before.

NEWS FLASH (-1, Offtopic)

Anonymous Coward | more than 12 years ago | (#2703105)

./ editors would not post this as news, so I will!

Title: 13 December 2001 Cumulative Patch for IE
Date: 13 December 2001
Software: Internet Explorer
Impact: Run Code of an Attacker's Choice
Max Risk: Critical
Bulletin: MS01-058

Microsoft encourages customers to review the Security Bulletin at:
http://www.microsoft.com/technet/security/bullet in /MS01-058.asp.

Issue:
This is a cumulative patch that, when installed, eliminates all
previously discussed security vulnerabilities affecting IE 5.5 and
IE 6. In addition, it eliminates three newly discovered
vulnerabilities.

- The first vulnerability involves a flaw in the handling of the
Content-Disposition and Content-Type header fields in an HTML.
stream. These fields, the hosting URL, and the hosted file data
determine how a file is handled upon download in Internet
Explorer. A security vulnerability exists because, if an
attacker altered the HTML header information in a certain way,
it could be possible to make IE believe that an executable file
was actually a different type of file -- one that it is
appropriate to simply open without asking the user for
confirmation. This could enable the attacker to create a web
page or HTML mail that, when opened, would automatically run an
executable on the user's system. This vulnerability affects
IE 6.0 only. It does not affect IE 5.5.

- The second vulnerability is a newly discovered variant of the
"Frame Domain Verification" vulnerability discussed in Microsoft
Security Bulletin MS01-015. The vulnerability could enable a
malicious web site operator to open two browser windows, one in
the web site's domain and the other on the user's local file
system, and to pass information from the latter to the former.
This could enable the web site operator to read, but not change,
any file on the user's local computer that could be opened in a
browser window. This vulnerabilty affects both IE 5.5 and 6.0.

- The third vulnerability involves a flaw related to the display
of file names in the File Download dialogue box. When a file
download is initiated, a dialogue provides the name of the file.
However, in some cases, it would be possible for an attacker to
misrepresent the name of the file in the dialogue. This could be
invoked from a web page or in an HTML email in an attempt to
fool users into accepting unsafe file types from a trusted
source. This vulnerabilty affects both IE 5.5 and 6.0.

Mitigating Factors:
File Execution Vulnerability:

- The vulnerability could not be exploited if File Downloads have
been disabled in the Security Zone from which the file is being
received. In most attempts to maliciously exploit this
vulnerability the file would be received from the Internet or
Intranet zone. Therefore, disabling File Downloads in these zones
can protect customers. This is not the default setting for either
of these zone, however.

- This affects IE 6.0 only.

Frame Domain Verification Variant:
- The vulnerability could only be used to view files. It could not
be used to create, delete, modify or execute them.

- The vulnerability would only allow an attacker to read files that
can be can be opened in a browser window, such as image files,
HTML files and text files. Other file file types, such as binary
files, executable files, Word documents, and so forth, could not
be read.

- The attacker would have to have knowledge of the exact file name
and location in other to successfully read the file on the
local system.

File Name Spoofing Vulnerability:
- The determination on choosing to accept a file download from an
Internet site should always be based on the trustworthiness of
the source and not on the file type. File downloads should never
be accepted from an untrusted source, no matter how harmless the
type may appear to be.

Risk Rating:
- Internet systems: Critical
- Intranet systems: Critical
- Client systems: Critical

Patch Availability:
- A patch is available to fix this vulnerability. Please read the
Security Bulletin at
http://www.microsoft.com/technet/security/bulletin /ms01-058.asp
for information on obtaining this patch.

Acknowledgment:
- Jouko Pynnonen of Oy Online Solutions Ltd
(http://www.solutions.fi/index.cgi/?lang=eng)

Next step is the return of the Mac Chimney.. (2, Interesting)

Anonymous Coward | more than 12 years ago | (#2703108)

Back in the 80s, you could get piezo fans for the Mac Plus' or you could build your own Mac Chimney. It was basically a pyramid that sat on top of the Mac with a 2" square chimney stack that extended from the top of the pyramid for a height of about 18". Supposedly, it provided the necessary draft to pull the heat out of the Mac Plus. For some reason my wife never appreciated the beauty of it sitting ontop of her computer...


I see no reason why the same technology could not be applied to modern CPUs and computers. It would be energy efficient to say the least..


On a side note, if you want an interesting geometry problem, try to mathematically design a pyramid out of cardboard for a specific height and base.

My childhood days with CmdrTaco, by Jon Katz (-1)

Genghis Troll (158585) | more than 12 years ago | (#2703111)

It all began when CmdrTaco called me and invited me to go camping with him
and another friend of his, Hemos. We were going to be entering sixth grade in
the following week, so he wanted to do this as sort of a last hurrah for
summer. I immediately agreed. After I got mom's ok, I packed my backpack and
tied my sleeping bag to the bottom, and headed over to CmdrTaco's house.

CmdrTaco's house was a large ranch house at the end of the dirt road I lived
on. Behind it, the trees and overgrown flora and wilderness seemed to stretch
on forever. We had gone treking through the woods many times, and had camped
out there a couple of times previously, both times with parental supervision.
This time, CmdrTaco's dad decided it would be all right for us to go off by
ourselves, and we left.

It was a hot summer evening, and by the time we lost sight of the house,
we were already hot and sweaty. After talking about it, we decided to camp
by the large pond about two miles into the woods. That way, once we got
camp set up, we could take a swim.

The water of the pond looked cool and inviting when we first saw it, and
it took a lot for us to put the small tent up first, and spread the large
beach towels near the edge of the pond.

As we started to take our clothes off, I watched CmdrTaco out of the corner
of my eye. We had been friends since kindergarden, and there was very little
we didn't share. Yet, for the first time, I began to notice how well-formed
CmdrTaco's body was. He was a bit taller than me, and his chest was smooth and
tan. He had a trim waistline, and his ass was small and delicate.

I noticed that, as I took off my underwear, my dick was growing larger.
I remembered that CmdrTaco had told me about jacking off, earlier that summer,
and had told me how to do it. I did, and the feeling was the most intense
pleasure I had yet felt in my young life. I knew that if I kept looking at
CmdrTaco's ass, I'd have to jack off before long, so I jumped into the pond.

CmdrTaco and Hemos jumped in behind me, and we laughed and splashed each other
with the cool, clean pond water. All the activity was just getting me harder,
and I knew I'd have to jack off soon or go crazy.

Just then, Hemos pushed me into CmdrTaco, and I felt my boner press into his
thigh. I also felt his boner press into my abdomen. My face must have turned
bright red, because CmdrTaco immediately said, "Hey! Katz's got a boner!"

"You do too!" I replied, grinning. He splashed me with water, but
laughed.

"That makes three of us with boners," Hemos said. He stood with the water
just touching the bottom of his balls, his twelve-year-old cock standing at
attention. CmdrTaco laughed and playfully grabbed at Hemos's boner. I groped
CmdrTaco's boner and Hemos groped mine.

After several seconds, we decided to get out of the water. We sat down
on the beach towels, our erections still standing out. We poked at each
others' boners for a few minutes.

"Man, I have got to jack off," CmdrTaco said, saying what was on both my
mind and Hemos's. Hemos, who had been groping CmdrTaco's balls, wrapped his hand
around CmdrTaco's six inch long meat and started pumping up and down. CmdrTaco's
face turned red, but he didn't push Hemos's hand away. I watched, wondering
what they were going to do next.

When Hemos bent over CmdrTaco's lap and started licking CmdrTaco's dick, my own
boner got even harder. CmdrTaco leaned back on the blanket, and Hemos slid CmdrTaco's
cock into his mouth. I watched, fascinated, as Hemos went up and down,
slurping, on my best friend's dick. CmdrTaco groaned loudly, his breath getting
shorter and shorter. Hemos made an almost purring sound as he sucked CmdrTaco,
and I knew what was going to happen next.

CmdrTaco came in Hemos's mouth, and he cried out loudly when the orgasm hit
him. Hemos kept sucking on CmdrTaco's meat, drinking down his adolescent fluids.
Some dribbled out of a corner of his mouth, and Hemos licked it up, and kissed
CmdrTaco's cock as it started to soften.

I suddenly realized that I had my own hand around my cock as I had been
watching them. "Wow..." I managed to say. "That looked great."

"Do you want me to suck you?" CmdrTaco asked. The thought of a hot mouth
around my cock sent a shiver of pleasure through me.

"Yes!" I replied, opening my legs and moving my hand from my cock. CmdrTaco
leaned over and touched my cock, stroking it gently. He wrapped his hand
around the five and three quarter inch shaft and squeezed gently as he leaned
forward. I could feel his breath hot on my boner, and I moaned with low
passion.

CmdrTaco's tongue touched my cock tip, and the electric heat made me groan
louder. He licked around the head in a clockwise spiral, then trailed down
the shaft to my smooth, hairless balls. He took one, then both in his mouth,
and I squirmed where I lay, amazed at how good it felt to have my balls in
another boy's mouth. Then, he let them out and licked his way back up to
the tip, and took the head in his mouth.

Slowly, my temperature rose as my cock slid further into his mouth. I
was in ecstasy when he got it all in his mouth, and my meat was fully
encased in his hot, wet mouth. "Suck me..." I moaned, and CmdrTaco started to
bob up and down on me like Hemos had bobbed on CmdrTaco earlier. His strokes
were long and slow, and each one produced a wave of pleasure that rolled
through me.

He increased the pace, and I started to feel my balls tingle. The
slurping, smacking sounds he made sounded like music to my ears, and I
started to moan louder and louder.

I stiffened, and knew I was about to come. When my orgasm arrived, it
was a blast of pure passion that tore through me, as my salty load shot out
into CmdrTaco's waiting mouth. CmdrTaco gulped down the cum, and still kept sucking
me, as I squeezed more out. A wave of pleasure, greater than any I'd ever
had while jacking off, had me riding high for minutes.

Finally, I started coming down, and my dick started to lose it's
hardness. CmdrTaco got up, leaned over, and kissed me. I opened my mouth, and
his tongue slipped inside, and I tasted my own cum. I kissed CmdrTaco back,
realizing that our friendship had taken a further step into love.

When we finally broke away, I said, "That was wonderful, CmdrTaco. Can we
do it again?"

"Sure," CmdrTaco replied. "But not right away. It'll take you a while to
be able to get another boner. Same with me."

"Have you done this before?" I asked.

"Only with Hemos," CmdrTaco said. "He taught me what to do, and now he's
going to teach you. Come over here." CmdrTaco took my hand and guided it over
to Hemos's cock, which was standing up from where he had been watching. I
gripped the cock, feeling the warmth and the gentle pulsing under my hand.
I squeezed, feeling it's thickness.

"Don't squeeze so hard," Hemos said. "Nice and gentle...that's it." I
squeezed it less hard and started to stroke his cock, all the while leaning
closer and closer to it. "That's it, go ahead and lick it." Hesitantly,
I put out my tongue and touched the tip, and was surprised when it jumped.
I licked it again, trying to imitate the circular motion on the head that
CmdrTaco had done for me.

"Okay, now take the head into your mouth," Hemos instructed. It slid in
gently, a warm presence inside my mouth. "Okay, now slide it in slowly...
watch the teeth...that's it...oh, god, yes..." As he sank further into my
mouth, I marveled that a boy's cock could taste so good.

When the cock tip touched my throat, I gagged. "Just relax your throat,"
Hemos said. "Let it slide past." I closed my eyes and let it slide further
in. The impulse to gag returned breifly, then went away, and soon, I had his
whole six inch cock in my mouth.

As I started going up and down on his cock, CmdrTaco head ducked under mine
and I could see his tongue licking Hemos's balls. I shifted around to the
side, to give CmdrTaco more room, and kept sucking on Hemos.

Hemos moaned loudly, and I knew that we were starting to make him feel
good. CmdrTaco had Hemos's balls in his mouth, and he was fondling my soft cock
with his left hand. I shivered, knowing that I'd have another boner before
the night was through.

"I'm gonna cum!" Hemos called, and soon enough, his cum started shooting
out of his cock and into my waiting mouth. CmdrTaco lifted his head up and
started licking the corner of my mouth, which had started to leak cum. I
took my mouth partially off Hemos's head and CmdrTaco took the other part, our
lips meeting as we drank Hemos's delicious boy juices. He tasted so good!

Finally, Hemos was drained, and he laid back, a big smile on his face.
CmdrTaco and I shared a cum-laced kiss, then snuggled up to Hemos on the blanket,
both of us taking turns in exchanging long french kisses with him.

Living the Life of Luxury (0, Offtopic)

poteet (443481) | more than 12 years ago | (#2703119)

Does this mean I can have miniature women feeding my Athlon grapes and other exotic fruits?

Where is the active cooling? (2, Interesting)

Bob_Robertson (454888) | more than 12 years ago | (#2703143)

Fans, fans fans. Might as well use a Tesla Turbine [execpc.com] to move ungodly volumes of air with very little noise. No fan blades, no resonance with the heat sink blades to make loud whine or buzz. Just the hiss of moving air over the heat sink blades.

However, solid state heat transfer has been around for ages. I would love to find an advert for a 12-volt refridgerator for camping that I saw back in the 1970's. It used a pezo film between two heat sinks, one on the inside and one on the outside. Apply the voltage, and heat was moved actively into the outside heat sink, enough to chill your beer and keep the fish fresh on the trip home.

Put such a film between the chip and a heat sink. Gosh wow, a cool CPU.

Bob-

Re:Where is the active cooling? (1)

TrouserPenguin (542511) | more than 12 years ago | (#2703171)

I actually used to have a bag of these things, small ones that were designed to stick on to high powered DIP chips with thermal epoxy. Peltier Junctions is the proper name. I tried to sell some of them to a surplus dealer when I moved and had to clean out the workshop but they wouldn't take them because they were classified as hazardous waste! Seems that they used to use Beryllium in the manufacturing process, so I was told, and they were very toxic if they got chipped.

Wearables technology (1)

nukebuddy (258109) | more than 12 years ago | (#2703200)

This might be helpful for wearables -- and the article authors seem to think so too:

From the article:

Piezoelectric fans are very low power, small, very low noise, solid-state devices that have recently emerged as viable thermal management solutions for a variety of portable electronics applications including laptop computers, cellular phones and wearable computers.


-nukebuddy

Of Course, one more requirement (0)

fean (212516) | more than 12 years ago | (#2703202)

The motors have to be able to convert heat->energy to move...

i.e. heat activated, the hotter it gets, the more it cools!!!! Can't get more efficient than that?!?!?!?!
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  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>