Chuck, is there a specific paint you used to shield against solar radiation? I rolled a gallon of white elastomeric roof coating from home depot onto one of our DDB boxes, and while it did drop the temp slightly, the results weren't that impressive. I think the issue with our test is we chose a site that has ~1.2kW of power draw, so most of the heat was likely from the equipment in the box rather than direct sunlight.
On Fri, Jul 2, 2021 at 1:21 PM Chuck McCown via AF <af@af.afmug.com> wrote: > 20+ years ago, I set up 4 identical outdoor enclosures. Temp telemetry. > Some live load, don’t remember the details. They were about 24” cubes. > All started out as gray. Tried sun shields, exterior insulation, vents, > fans, peltier cooling modules. Silver paint, white paint. The > overwhelming #1 thing that lowered temps was the satellite white paint. By > a long stretch. Then filtered powered vents. Silver paint was worse than > gray. I wonder if the railroad still used silver. Sun shades did little > to help if the box was satellite white. Interior styrofoam insulation > helped a bit, not much, but was cheap and easy to add to the white paint. > > Sent from my iPhone > > On Jul 2, 2021, at 11:39 AM, Sterling Jacobson <sterl...@avative.net> > wrote: > > > > Super hot out here in Utah. > > > > My fiber cabinets running Active switches are getting harder to maintain > and AC units on the side of the cabinets are starting to fail faster. > > > > I’ve had the thought of shading them with a permanent four post structure > and a reflective white painted cover to shade them from the southern sun > exposure. > > > > Then I thought, well, maybe it might be interesting to “shade” the cabinet > with solar panels as well. > > > > Is anyone doing this? > > > > The AE cabinets all have Alpha FXM 15 or 20A units running the UPS to a > string of four 12v AGM batteries. > > > > I do have limited rack space in some of these available since the > batteries sit in a slide out section below. > > > > Haven’t done solar in like a decade since I had remote WISP type sites. > > > > Is this doable to offset power costs and also get the temp down for the > cabinet? > > > > Or is it just a huge time suck and money pit for no real return? > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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