Figuring out how/where you need to have a device to shade a box should
be the exact same process and figuring out the best place to mount a
solar panel shouldn’t it? If fact wouldn’t logic dictate that you put
in a solar panel, harvest the energy AND have it be the shading method
as well?
Thank you,
Brian Webster
www.wirelessmapping.com
*From:*AF [mailto:af-boun...@af.afmug.com] *On Behalf Of *Adam Moffett
*Sent:* Monday, July 12, 2021 9:55 AM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Solar and shade for AE Fiber Cabinet
Shade moves, but maybe you only concern yourself with where the sun is
during the hottest 4 hours of summer days.
On 7/9/2021 10:24 PM, Chuck McCown via AF wrote:
That is a good point, shade moves. So the shield will have to be
big and maybe have vertical features. I did shades. Something
convinced me they were not worth the effort.
Sent from my iPhone
On Jul 9, 2021, at 8:16 PM, Bill Prince <part15...@gmail.com>
<mailto:part15...@gmail.com> wrote:
Those are options. For sure, black will both absorb more and
radiate more. The question is if you can keep it shaded. If
not, then white is the choice.
In a perfect world, you would paint it chameleon. White in the
sun, and black in the shade/dark.
--
bp
part15sbs{at}gmail{dot}com
On Fri, Jul 9, 2021 at 6:47 PM Chuck McCown via AF
<af@af.afmug.com <mailto:af@af.afmug.com>> wrote:
Someone ought to test that.
Sent from my iPhone
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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