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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: cooling door
On 29 Mar 2008, Paul Vixie wrote: > > page 10 and 11 of <http://www.panduit.com/products/brochures/105309.pdf> > says there's a way to move 20kW of heat away from a rack if your normal > CRAC is moving 10kW (it depends on that basic air flow), permitting six > blade servers in a rack. panduit licensed this tech from IBM a couple > of years ago. i am intrigued by the possible drop in total energy cost > per delivered kW, though in practice most datacenters can't get enough > utility and backup power to run at this density. if "cooling doors" > were to take off, we'd see data centers partitioned off and converted to > cubicles. Can someone please, pretty please with sugar on top, explain the point behind high power density? Raw real estate is cheap (basically, nearly free). Increasing power density per sqft will *not* decrease cost, beyond 100W/sqft, the real estate costs are a tiny portion of total cost. Moving enough air to cool 400 (or, in your case, 2000) watts per square foot is *hard*. I've started to recently price things as "cost per square amp". (That is, 1A power, conditioned, delivered to the customer rack and cooled). Space is really irrelevant - to me, as colo provider, whether I have 100A going into a single rack or 5 racks, is irrelevant. In fact, my *costs* (including real estate) are likely to be lower when the load is spread over 5 racks. Similarly, to a customer, all they care about is getting their gear online, and can care less whether it needs to be in 1 rack or in 5 racks. To rephrase vijay, "what is the problem being solved"? [not speaking as mlc anything]
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