tag:blogger.com,1999:blog-3405947399334057664.post851569633422547767..comments2016-06-08T21:34:28.211-04:00Comments on Data Centers, Unclouded: Honey, I Positively Pressurized the Hot Aisle! Anonymoushttp://www.blogger.com/profile/02434904892995614380noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-3405947399334057664.post-32491653496415201242014-04-14T03:33:57.067-04:002014-04-14T03:33:57.067-04:00It is important to measure the right temperature i...It is important to measure the right temperature in the server area to avoid overheat and hanging.Summer Lyra Mileshttps://www.racksandups.com.au/ups-ct79.htmlnoreply@blogger.comtag:blogger.com,1999:blog-3405947399334057664.post-75344058794293015942013-05-24T15:21:58.822-04:002013-05-24T15:21:58.822-04:00This shift to cloud computing is really gaining sp...This shift to cloud computing is really gaining speed, yet the sales of <a href="http://www.gawtechnology.net/" rel="nofollow">data cabinets</a> and other data center essentials are increasing. It's an interesting contradiction.<br />Anonymoushttps://www.blogger.com/profile/06048658177329809248noreply@blogger.comtag:blogger.com,1999:blog-3405947399334057664.post-29718594976791928622013-04-17T16:02:01.504-04:002013-04-17T16:02:01.504-04:00Mark, thank you for your comments and your insight...Mark, thank you for your comments and your insight. Problems in the cold aisle would arise if it was under negative pressure, which did not occur here. I'll have more CFD blogs in the future and will keep you informed. Each day is a school day as one of folks commented earlier! +Anonymoushttps://www.blogger.com/profile/02434904892995614380noreply@blogger.comtag:blogger.com,1999:blog-3405947399334057664.post-21860469074549867952013-04-15T10:05:19.446-04:002013-04-15T10:05:19.446-04:00Hi Ramzi, I really enjoyed this post which perfect...Hi Ramzi, I really enjoyed this post which perfectly highlights the benefits of simulation in mitigating the risk of hotspots in data centers. I’m delighted that you chose to use our 6SigmaDC software to simulate the problem – investigating and modelling a performance issue like this so that you can see what’s happening is exactly what we built it for!<br />Like you we’ve seen a number of improvised containment systems, with varying levels of sophistication in design and construction, and success! I think that many data center operators are attracted to the concept of containment by the sheer simplicity of the idea – if I separate hot and cool airflows the system will be more efficient. But as you’ve illustrated, sometimes what seems like a good idea conceptually can actually create unforeseen operational problems in practice. Such issues can be difficult to clearly understand without the use of CFD to simulate temperature build-up and airflow.<br />Standard data center architecture is effectively an open environment for airflows, with hot and cool air mixing within the facility. Although airflow mixing is inefficient, if there is cool air ‘floating around’ the data center there is a good chance (where chance is probably the operative word) that any re-circulated air won’t be that hot. You’ve rightly concluded that an uncontained data center might actually be more effective than a poorly designed contained one.<br />As a specialist in CFD simulation for data centers, we advocate the use of modelling for the whole lifecycle, from cradle to grave, including design, upgrades, additions and equipment moves. The obvious benefit is that modelling allows you to answer the question “what happens if” before any work is carried out in the data center. Using simulation, you cannot only see the overall effect of containing the hot aisle in this case, but also what happens when servers are idling or off and creating a recirculation issue.<br />Whilst airflow segregation is notionally a good idea as it can increase the efficiency of the cooling system, containment can disrupt airflow for good or for bad depending on the design. Ironically, deliberately preventing the mixing of the hot exhaust air from the cool supply air means that if there is recirculation there is a good chance that the air will be hot, maybe hot enough to potentially pose a much larger threat to the IT equipment we are trying to protect.<br />Your observations and conclusions about air pressure in the data center are interesting. Did you model the effect of positively pressurizing the cold aisle or additional flow controls to try to balance the airflow?<br />Anonymousnoreply@blogger.com