That's an interesting thought about burying it. It would be cool, but a
dry vault is heavy though. It's needs to be sealed against ground water
and that makes it buoyant, so they pour a huge slab and bolt it down to
stop it floating out of the ground. I've heard a story of an
underground fuel tank breaking the bolts that held it down and bursting
out of the ground....supposedly just buoyancy did that. Your cable
entrances would have to be water tight too.
Or maybe you make it a wet hole with a sump pump. Or it's a wet hole
containing a submersible closure. In any case it would make A/C
unnecessary, but I'd be scared of the wetness. Maybe some of you
desert dwellers could get away with this though.
-Adam
On 8/9/2019 10:23 AM, Ken Hohhof wrote:
Bury it in the ground? I have a customer with a house that is mostly
buried in the ground, and I think adobe houses similarly use the
thermal mass of the bricks to average out t he daytime and nighttime
temperatures.
There have been news reports recently about advances in radiative
cooling that can passively cool to as much as 20 degrees below ambient
air temperature even during the heat of the day, by radiating the heat
into space. Requires a coating that reflects all incoming sunlight.
https://phys.org/news/2018-10-energy-saving-radiative-cooling-ready-real-world.html
*From:* AF <[email protected]> *On Behalf Of *David Coudron
*Sent:* Friday, August 9, 2019 7:34 AM
*To:* AnimalFarm Microwave Users Group <[email protected]>
*Subject:* Re: [AFMUG] Small climate controlled enclosure
We have had pretty good luck fan cooling using relays. Seems very
reliable, but of course will only cool to ambient temp and you have to
be open to the outside. If you need a fully closed and cooled
enclosure you probably will have to buy a good enclosure and purchase
the cooling separately from what we have found by doing a quick look
in the past. Polycase and FactoryMation have pretty good prices on
decent enclosures. Kooltronic and others make closed loop AC/cooling
for enclosures but we haven’t dug too deep on them as fans seem to
handle the issues for now.
Regards,
David Coudron
*From:* AF <[email protected] <mailto:[email protected]>>
*On Behalf Of *Jason McKemie
*Sent:* Thursday, August 8, 2019 5:32 PM
*To:* AnimalFarm Microwave Users Group <[email protected]
<mailto:[email protected]>>
*Subject:* [AFMUG] Small climate controlled enclosure
I'm looking for a small enclosure that has either AC or TEC cooling to
house a PON OLT and power equipment. Would be nice if someone made an
outdoor rated PON OLT that is affordable, but those don't seem to
exist. I would be attaching this enclosure to a utility pole.
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