[Beowulf] rear door heat exchangers

Michael Di Domenico mdidomenico4 at gmail.com
Wed Feb 1 05:23:06 PST 2012

On Tue, Jan 31, 2012 at 6:47 PM, Lux, Jim (337C)
<james.p.lux at jpl.nasa.gov> wrote:
> Maybe there's an issue with the weight and or flexible tubing on a swinging door?
> The Hoffman products in Andrew's email, I think, aren't the kind that hang on a door, more hang on the side of a large box/cabinet (Type 4,12, 3R enclosure) or wall.
> They're also air/air heat exchanges or airconditioners (and vortex coolers.. but you don't want one of those unless you have a LOT of compressed air available)
> http://www.42u.com/cooling/liquid-cooling/liquid-cooling.htm
> shows "in-row liquid cooling" but I think that's sort of in parallel
> They do mention, lower down on the page, "Rear Door Liquid Cooling"
> But I notice that the Liebert XDF-5 which is basically a rack and chiller deck in one, only pulls out 14kW.
> From DoE:
> http://www1.eere.energy.gov/femp/pdfs/rdhe_cr.pdf
> They refer the ones installed at LLBL  as RDHx units, but carefully avoid telling you the brand or any decent data.  They do say they cost $6k/door, and suck up 10-11kW/rack with 9 gal/min flow of 72F water.
> Googling RDHx turns up "CoolCentric.com"
> http://www.coolcentric.com/resources/data_sheets/Coolcentric-Rear-Door-Heat-Exchanger-Data-Sheet.pdf
> 33kW is as good as they can do.
> I also note that they have no fans in them.

Yes, these are the doors we have now.  I was trying to remain vendor
agnostic on the list.  We have them running well passively up to 25kw

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