> > Which law of thermodynamics says there's no such thing as a free lunch?
That would be rule 2 The rules: 0. Everyone plays 1. Nobody can win 2. You can't break even 3. Well, you can break even on a really really really cold day 3a. It never gets that cold. -- Doug > > Prentice > >> >> >> >> >> >> On Fri, 25 Jan 2019 at 16:33, Prentice Bisbal via Beowulf >> <beowulf@beowulf.org <mailto: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 >> <mailto:chuck_pet...@selinc.com> wrote: >>> Well, this is interesting. >>> >>> "According to Forced Physicsâ <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 companyâs 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. âWe are solving the problem that electrons >>> create,â he said." >>> >>> A Cooler Cloud: A Clever Conduit Cuts Data Centersâ 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 <http://www.selinc.com/> >>> >>> SEL Synchrophasors - A New View of the Power System >>> <http://synchrophasor.selinc.com >>> <http://synchrophasor.selinc.com/>> >>> >>> Making Electric Power Safer, More Reliable, and More Economical (R) >>> >>> ** Registered in Oregon. >>> >>> _______________________________________________ >>> Beowulf mailing list,Beowulf@beowulf.org >>> <mailto:Beowulf@beowulf.org> sponsored by Penguin Computing >>> To change your subscription (digest mode or unsubscribe) >>> visithttp://www.beowulf.org/mailman/listinfo/beowulf >> _______________________________________________ >> Beowulf mailing list, Beowulf@beowulf.org >> <mailto: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 > _______________________________________________ > 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 > -- Doug _______________________________________________ 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
