Even a concrete slab on the ground will stay cool if it’s in the shade. I used to have a dog who had that figured out.
From: AF <[email protected]> On Behalf Of Adam Moffett Sent: Friday, August 9, 2019 10:37 AM To: [email protected] Subject: Re: [AFMUG] Small climate controlled enclosure 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 <mailto:[email protected]> <[email protected]> On Behalf Of David Coudron Sent: Friday, August 9, 2019 7:34 AM To: AnimalFarm Microwave Users Group <mailto:[email protected]> <[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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