Sorry, their videos do have a fan at one end. In the video though they do say "enables ten times the server density" - as opposed to what? I am keeping an open mind though. Forced Physics guys - hint I work somewhere which has lots of servers.
On Fri, 25 Jan 2019 at 17:15, John Hearns <hear...@googlemail.com> wrote: > 3. Using this technology means a complete redesign of your server hardware > and possibly your racks. > It does say it fits in standard OpenCompute racks. But I gues the racks > are the only thing you get to keep. > > I think I understand what they are getting at - that shape will cause > expansion of the air volume, and hence cooling. > I guess like SR71 engine spikes or something. > But how the heck do they move the air fast enough to do the cooling > without fans? > > They keep referring to external air. Which is fine. But if you ever want > to do this make sure the external air is WELL filtered. > > > > > > On Fri, 25 Jan 2019 at 16:33, Prentice Bisbal via Beowulf < > beowulf@beowulf.org> wrote: > >> You all know how much I like talking about heat transfer and server >> cooling, so I decided to do some research on this product: >> >> Here's their website: >> >> https://forcedphysics.com >> >> and here's their YouTube channel with 5 videos: >> >> https://www.youtube.com/channel/UClwWeahYGuNl0THWVz1Hyow/videos >> >> This is really nothing more than an air-cooled heatsink. I'm afraid I'm >> going to have to call BS on this technology for the following reasons: >> >> 1. It still uses air as the primary cooling medium. I just don't think >> air has adequate thermal conductivity or thermal capacity to serve modern >> processor, no matter what you do to it. >> >> 2. In the videos, they present highly idealized tests with no control to >> use for comparison. How do I know I wouldn't get the same results doing the >> same experiment but using a similar duct fashioned out of sheet metal. >> >> 3. Using this technology means a complete redesign of your server >> hardware and possibly your racks. >> >> 4. None of the information in the videos or on their website really >> explains how this technology works, and what really differentiates it from >> any other air-cooled heat sink. Most people with a good invention are >> usually excited to tell you how it works. Since they brag about 30 >> international patents for this, there's no need to try to protect a trade >> secret. >> >> 5. This statement: >> >> The fins work like teeth in a comb, neatly orienting air molecules to >> point in the same direction and arranging them into columns. >> >> Based on my education, this statement seems to be completely devoid of >> science. >> >> This statement seems to defy the laws of physics. Last time I checked, >> unless an atom or molecule is at absolute zero, it has movement, whether >> it's spinning or vibrating, or both, so how can they get air molecules to >> line up all in neat little rows, where the molecules are all pointing the >> same way? >> >> This also implies very laminar flow. As fluid velocity increases that >> the diameter of the channel decreases, the Reynolds Number increases. As >> the Reynold's number goes up, turbulence increases, so mathematically, I >> would expect this flow to be tubulent, and not laminar. From my classes on >> heat transfer, turbulent flow around the heat transfer surface increases >> heat transfer, so laminar flow in this case wouldn't be a good thing. >> >> Until they can provide better comparisons with real servers in real data >> center environments, I'm going to classify this as "snake oil" >> >> https://en.wikipedia.org/wiki/Snake_oil >> >> Prentice >> >> On 1/24/19 3:54 PM, chuck_pet...@selinc.com wrote: >> >> Well, this is interesting. >> >> "According to Forced Physics’ <https://forcedphysics.com/ >> [forcedphysics.com] >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__forcedphysics.com_&d=DwMFAw&c=-_uRSsrpJskZgEkGwdW-sXvhn_FXVaEGsm0EI46qilk&r=fawF3TRTwCqlaBkoLcxYCr4F4NRwCc64hmEgi9rHPpE&m=zr6lAlVphGxOQTXSElww9hGpqb9IZPik0_MN2v8Fqjs&s=lb4Hi9X8NKIYWe_e1RU3Cw4gr9Uz_B7n5pnCNY0ss3U&e=>> >> chief technology officer, David Binger, the company’s conductor can help a >> typical data center eliminate its need for water or refrigerants and shrink >> its 22-MW load by 7.72 MW, which translates to an annual reduction of 67.6 >> million kWh. That data center could also save a total of US $45 million a >> year on infrastructure, operating, and energy costs with the new system, >> according to Binger. “We are solving the problem that electrons create,” he >> said." >> >> A Cooler Cloud: A Clever Conduit Cuts Data Centers’ Cooling Needs by 90 >> Percent >> >> https://spectrum.ieee.org/energy/environment/a-cooler-cloud-a-clever-conduit-cuts-data-centers-cooling-needs-by-90-percent >> [spectrum.ieee.org] >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__spectrum.ieee.org_energy_environment_a-2Dcooler-2Dcloud-2Da-2Dclever-2Dconduit-2Dcuts-2Ddata-2Dcenters-2Dcooling-2Dneeds-2Dby-2D90-2Dpercent&d=DwMFAw&c=-_uRSsrpJskZgEkGwdW-sXvhn_FXVaEGsm0EI46qilk&r=fawF3TRTwCqlaBkoLcxYCr4F4NRwCc64hmEgi9rHPpE&m=zr6lAlVphGxOQTXSElww9hGpqb9IZPik0_MN2v8Fqjs&s=VuDTSuinKPMpF6NCztFZkSGOVo3LD7MLjroIj_sn0ao&e=> >> >> >> Chuck Petras, PE** >> Schweitzer Engineering Laboratories, Inc >> Pullman, WA 99163 USA >> http://www.selinc.com >> >> SEL Synchrophasors - A New View of the Power System < >> http://synchrophasor.selinc.com> >> >> Making Electric Power Safer, More Reliable, and More Economical (R) >> >> ** Registered in Oregon. >> >> _______________________________________________ >> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing >> To change your subscription (digest mode or unsubscribe) visit >> http://www.beowulf.org/mailman/listinfo/beowulf >> >> _______________________________________________ >> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing >> To change your subscription (digest mode or unsubscribe) visit >> http://www.beowulf.org/mailman/listinfo/beowulf >> >
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