Someone ought to test that. Sent from my iPhone
> On Jul 9, 2021, at 7:40 PM, Steve Jones <thatoneguyst...@gmail.com> wrote: > > > I could have sworn it was afmug sourced, but somewhere along the line I > picked up that a shaded enclosure will actually perform better if it is a > dark color. The whites and reflective colors are better at reflecting energy > off of them, but not at dissipating it, dark colors shed heat better. In a > shaded environment reflectivity is moot. > > >> On Fri, Jul 9, 2021, 11:09 AM Chuck McCown via AF <af@af.afmug.com> wrote: >> My tests had very little live load. I think only 100 watts so that is >> probably the major difference. >> We just use a color called satellite white. I don’t think it matters much. >> >> From: castarritt >> Sent: Friday, July 9, 2021 9:26 AM >> To: AnimalFarm Microwave Users Group >> Subject: Re: [AFMUG] Solar and shade for AE Fiber Cabinet >> >> 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 >> >> -- >> 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 > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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