On Jul 9, 2021, at 7:40 PM, Steve Jones
<thatoneguyst...@gmail.com <mailto: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 <mailto: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?
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