|
Title: fanless heatsink...finally some quiet mining? Post by: trouserless on July 13, 2011, 01:02:59 PM http://www.extremetech.com/extreme/89710-the-fanless-spinning-heatsink-the-heatsink-is-the-fan
Looks like the big brains at Sandia National labs have come up with a new heatsink that actually rotates as it heats up on an "air bearing" spinning a sort of metal impeller that draws cool air in and expels hot air. Too bad it looks like it only operates on an horizontal surface. Title: Re: fanless heatsink...finally some quiet mining? Post by: pdawg on July 13, 2011, 01:06:39 PM Pure awesomeness.....
Title: Re: fanless heatsink...finally some quiet mining? Post by: tosku on June 27, 2012, 02:06:40 AM Almost a year later, I find this article: http://www.extremetech.com/computing/131656-the-fanless-heatsink-silent-dust-immune-and-almost-ready-for-prime-time
The idea sure looks cool on video, but I wonder how much a CPU cooler like this would cost. Title: Re: fanless heatsink...finally some quiet mining? Post by: Koooooj on June 27, 2012, 03:35:34 AM I saw something like this on Tom's Hardward a few days ago! I wonder when it'll be available to purchase
Just one more reason I want to work at Sandia! Title: Re: fanless heatsink...finally some quiet mining? Post by: gamebak on June 27, 2012, 03:44:22 AM impresive heatsink, but it seems a little big don't you agree ?
Title: Re: fanless heatsink...finally some quiet mining? Post by: silentseawolf on June 27, 2012, 04:41:07 AM Rule 4: there is no such thing as a heat sink that is too big, especially on a custom rig.
you have too look at it in terms of potential, not practical. and by the look of it, there it LOTS of potential there, lol. :D Title: Re: fanless heatsink...finally some quiet mining? Post by: tosku on June 27, 2012, 08:59:22 AM Do you think this thing has to be positioned horizontally? It looks in the video like the fan & heat sink part would fall of if you tilted it.
Title: Re: fanless heatsink...finally some quiet mining? Post by: silentseawolf on June 27, 2012, 04:45:30 PM naa, it would be impossible to sell a product where you could only mount it on a horizontal plane. the motor shaft looks like it would hold it on, and when its running it floats on air, so that would not be a problem of orientation.
Title: Re: fanless heatsink...finally some quiet mining? Post by: Fiyasko on June 27, 2012, 06:21:25 PM naa, it would be impossible to sell a product where you could only mount it on a horizontal plane. the motor shaft looks like it would hold it on, and when its running it floats on air, so that would not be a problem of orientation. LOL YES IT WOULD BE A PROBLEM!Gavity is everything! Title: Re: fanless heatsink...finally some quiet mining? Post by: nedbert9 on June 27, 2012, 08:50:36 PM very cool stuff. What about uses in heat exchangers? Let's say, what is the possible impact to AC units with fixed radiators? Title: Re: fanless heatsink...finally some quiet mining? Post by: RDWHAHB on June 27, 2012, 11:12:20 PM naa, it would be impossible to sell a product where you could only mount it on a horizontal plane. the motor shaft looks like it would hold it on, and when its running it floats on air, so that would not be a problem of orientation. LOL YES IT WOULD BE A PROBLEM!Gavity is everything! well harddrives use an airbearing to allow the arm (head?) to float over the spinning platter at a ridiculously small distance, and I don't believe there is any active control to adjust downward force to correct for a change in orientation. The air bearing upward force is balanced by a downward magnetic force. As long as these "springs" are very stiff relative to the weight of the impeller, it shouldn't be an issue. Title: Re: fanless heatsink...finally some quiet mining? Post by: Fiyasko on June 27, 2012, 11:34:22 PM Yeah... IF the springs are relativly stiff, But at the same time, if you put the impeller on it's side, Wouldnt you spilt the overall durability in half by putting majority of the weight down onto lets say 3/6 springs?
HDD's are different, The arm is a very solidly connected peice, And yes, It does use an air bearing to stay in the correct place, However, a HDD "disc" is firmly held in place and is Much Much lighter than these proposed impellers.. Where as with these impellers it would seem that simply adding a little bit more weight could make it grind along the bottom of it's rotary platform, I could be totally incorrect tho, But my main point is that the impellers weight is going to be Poorly heldup if just connected straight to the motor (like they show in the demo) Thoughts? Title: Re: fanless heatsink...finally some quiet mining? Post by: RDWHAHB on June 28, 2012, 12:13:47 AM I said springs in quotes because there's no springs.
Relevant info from Q&A with the inventor: Quote Q: Does the air bearing heat exchanger only work in a horizontal orientation? Or are other angles possible? JK: As discussed in the white paper, a downward restoring force many times that of the gravitational force acting on the mass of the heat-sink-impeller is generated by attractive interaction of the permanent magnet rotor and the high magnetic permeability stator. For this reason the device can operate in any orientation and the air gap varies little as a function of orientation angle. Title: Re: fanless heatsink...finally some quiet mining? Post by: bighecks on June 28, 2012, 12:53:47 AM I might want to get one of these my computer gets to much dust :(
Title: Re: fanless heatsink...finally some quiet mining? Post by: auctioneeeeer on June 28, 2012, 12:59:13 AM Sign me up for these :)
Title: Re: fanless heatsink...finally some quiet mining? Post by: CoinLab on June 28, 2012, 01:16:12 AM Almost a year later, I find this article: http://www.extremetech.com/computing/131656-the-fanless-heatsink-silent-dust-immune-and-almost-ready-for-prime-time The idea sure looks cool on video, but I wonder how much a CPU cooler like this would cost. Cool video! I'd love to have these in my home gaming rig. Title: Re: fanless heatsink...finally some quiet mining? Post by: Fiyasko on June 28, 2012, 01:35:03 AM I said springs in quotes because there's no springs. *bows* I goodsir have been Served, And i verymuch enjoyed my food!, Thankyou!Relevant info from Q&A with the inventor: Quote Q: Does the air bearing heat exchanger only work in a horizontal orientation? Or are other angles possible? JK: As discussed in the white paper, a downward restoring force many times that of the gravitational force acting on the mass of the heat-sink-impeller is generated by attractive interaction of the permanent magnet rotor and the high magnetic permeability stator. For this reason the device can operate in any orientation and the air gap varies little as a function of orientation angle. Title: Re: fanless heatsink...finally some quiet mining? Post by: tjb0607 on June 28, 2012, 05:39:38 AM Well the heatsink would obviously be considerably heavier than a fan, so it would take some more power. Probably not too much, but still a thing to put into consideration.
Title: Re: fanless heatsink...finally some quiet mining? Post by: phantitox on June 28, 2012, 06:37:02 AM do not think it necessarily big as seen in the video, if it is much more efficient as say that the current coolers, in theory the end product should be much smaller.
Title: Re: fanless heatsink...finally some quiet mining? Post by: tosku on June 28, 2012, 09:35:00 AM Well the heatsink would obviously be considerably heavier than a fan, so it would take some more power. Probably not too much, but still a thing to put into consideration. Newton's second law of motion: Quote The acceleration a of a body is parallel and directly proportional to the net force F acting on the body, is in the direction of the net force, and is inversely proportional to the mass m of the body, i.e., F = ma. http://en.wikipedia.org/wiki/Newton's_laws_of_motionThe heavier heatsink would only require more force to spin when it's accelerating. Once it's spinning at top speed, the weight is not of significant importance. Title: Re: fanless heatsink...finally some quiet mining? Post by: Gabi on June 28, 2012, 10:49:04 AM I want one! I hope they will really sell it!
Title: Re: fanless heatsink...finally some quiet mining? Post by: Fiyasko on June 28, 2012, 03:00:12 PM Well the heatsink would obviously be considerably heavier than a fan, so it would take some more power. Probably not too much, but still a thing to put into consideration. Newton's second law of motion: Quote The acceleration a of a body is parallel and directly proportional to the net force F acting on the body, is in the direction of the net force, and is inversely proportional to the mass m of the body, i.e., F = ma. http://en.wikipedia.org/wiki/Newton's_laws_of_motionThe heavier heatsink would only require more force to spin when it's accelerating. Once it's spinning at top speed, the weight is not of significant importance. Title: Re: fanless heatsink...finally some quiet mining? Post by: RDWHAHB on June 28, 2012, 06:20:07 PM I'm curious about startup. It has to be spinning to produce the air cushion, and is otherwise touching in contact right?
Title: Re: fanless heatsink...finally some quiet mining? Post by: Fiyasko on June 28, 2012, 09:20:13 PM I'm curious about startup. It has to be spinning to produce the air cushion, and is otherwise touching in contact right? Man makes a good point...I think they leave a Tiiiiiny gap to allow room for it to spin up and create it's aircushion, But.. At the same time if it does that, It could become Very dust vulnerable... |