nanog mailing list archives
Re: rack power question
From: Paul Vixie <paul () vix com>
Date: Tue, 25 Mar 2008 14:03:29 +0000
Matthew Crocker <mcrocker () crocker com> wrote:
Seal off the room so you can control your replacement air source. Put a series of cyclone dust collectors (think huge Dyson Vacuum) on your inbound air. http://www.proventilation.com/products/ProductsView.asp?page=1&gclid=CKyD04SRqJICFQUilgod-isIRg
neat stuff. isc's neighbor has got one of these (for an industrial process). they are noisy, and not 100% duty cycle rated, but it's an interesting idea.
Then distribute your air through some electrostatic dust collectors http://www.dustcollectorexperts.com/electrostatic/
two of the ESP Disadvantages listed on that page are fatal in my application: o High initial cost o Materials with very high or low resistivity are difficult to collect however, this page also mentions "baghouse" filters, which i'd also heard in a private reply, and am now investigating.
Then run it through HEPA filters.
:-). my servers don't have asthma. HEPA is hellishly expensive, annually, due to the number of filter replacements you need when the duty cycle is 100%.
How do you manage your humidity when you are pulling in 1% humidity 30 degree air? It is more expensive to add water to the air then it is to cool it sometimes.
redwood city, california has signs over several streets leading to its oldtown that say (and i'm not making this up) "climate best by government test". what this appears to mean is, we have about three 30F weeks per year, and we have three four 100F weeks per year, and the rest of the time, it's between 50F and 70F, during which time the humidity is perfect for servers.
Current thread:
- Re: rack power question, (continued)
- Re: rack power question Paul Vixie (Mar 25)
- Re: rack power question chuck goolsbee (Mar 25)
- Re: rack power question Petri Helenius (Mar 25)
- Re: rack power question Paul Vixie (Mar 25)
- Re: rack power question William Herrin (Mar 25)
- Re: rack power question Paul Vixie (Mar 25)
- Re: rack power question Petri Helenius (Mar 25)
- Re: rack power question Dorn Hetzel (Mar 26)
- Re: rack power question Petri Helenius (Mar 26)
- RE: rack power question John Lee (Mar 25)
- Message not available
- Re: rack power question Paul Vixie (Mar 25)
- data center loading (was:Re: rack power question) Lamar Owen (Mar 26)
- Re: data center loading (was:Re: rack power question) Robert Boyle (Mar 26)
- Re: rack power question Joe Greco (Mar 22)
- Re: rack power question david raistrick (Mar 22)
- Re: rack power question Patrick Clochesy (Mar 22)
- Re: rack power question Tony Finch (Mar 26)
- Re: rack power question Martin Hannigan (Mar 28)