How much airflow per square centimeter do they generate? As for the cluster here plenty of space available. To rent office space is around a 50 euro a square meter a year over here, not sure about there. So the cluster, some cardboard and huge fans of 14 and 18 CM are diong the job to cool the nodes and switch, mellanox of course. now as i understand the square meters they reserve for datacenters is always far too limited, causing space each node eats as important as well, yet that's not the problem here in my office.
The thing that worries me more is the airflow to outside (and inside). Usually only have limited amount of square centimeters of tube there. The 'industrial' fans that have massive airflow, they're very very noisy. I'm already wondering about using some massive cardboard box and blow in air there using 8 fans (@ 100CFM each) or so and then behind them a second layer of fans, around 6 @ 100CFM, creating a massive overpressure, hoping that this will generate more airpressure, enough to blow in and blow out through some meters of tubing, but seems not like a perfect solution to me. On Jun 6, 2012, at 2:42 PM, Prentice Bisbal wrote: > > On 06/06/2012 05:38 AM, Daniel Pfenniger wrote: >> Nathan Moore wrote: >>> All, >>> >>> This is barely beowuf related... >>> >>> New desktop machine is a Shuttle SX79R5, >>> http://us.shuttle.com/barebone/Models/SX79R5.html >>> >>> In the past, shuttles have been very quiet, but this one has a >>> fairly loud >>> variable speed fan on the CPU heat exchanger. I normally buy >>> replacement parts >>> from vendors like newegg, but their selection of 90mm case fans >>> mainly seems to >>> be described by CFM and whether the fan has LED lights mounted in >>> it (FYI, that >>> is not a selling point). >>> >>> So, is there an engineer's version of newegg that ya'll know >>> about? There must >>> be a super quiet 90mm fan out there that I can pick up for $10... >> I remind ads for quiet and more efficient rotor-less fans for PC's >> but >> cannot find such products anymore. >> >> The idea was to maximize the air flow area by displacing the >> central motor >> to the blade edges. Not only the larger central area would allow >> a lower, >> quieter blade speed, but the blades being accelerated at their >> extremities >> by the circular motor would be mechanically more stable, less >> subject to >> vibrations. My guess is that such fans, although technically >> better, were >> too expensive in regard of the advantages. >> > I had one of these fans on one of my CPU heatsinks a few years ago. It > was much quieter than the fan it replaced,but still not all that quiet > when compared to a Dell or HP tower. I forget the name of the > manufacturer or the model. The last time I looked, I couldn't find > them > anywhere. > > -- > Prentice > _______________________________________________ > 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
