Donkey wrote:
Wow.. Looky here, it's my fridge!!
Well, ALMOST my fridge.. The description here is a little off.
There's no cob in it..
Basically it's a big swamp cooler fed by incoming underground air. It's very well insulated, has flue adjustments for incoming and outflowing air and it's got cheap beer in cans for thermal mass. I chose aluminum cans because they are nicely conductive and won't inhibit or insulate. The whole mess is powered by a solar chimney.
It works pretty well and is MARKEDLY cooler inside than outside ALL of the time. It's NOT going to get 40 deg. inside during the summer, though when the flue adjustments are just right it will provide more than a 10 deg drop in temp..
Using the word "refrigerator" on this thing is a mismatch.. Calls to mind a standard appliance with constant temperatures etc, which this is NOT.. We call it the pantry. It's basically an above ground root cellar and we can keep most things in there though we have a small trailer fridge for meat, dairy and whatnot.
What I need to do to it is improve the solar chimney. It's in an unfinished state and it's likely that right now it's just acting like a regular old chimney. Some of my earlier tests created a noticeable updraft and I'm not seeing as much of that in my gizmo as I'd like. Within limits, the hotter the chimney, the more the updraft, the cooler it should get in the box.