DIY "TWO STAGE" Indirect Evap Air Cooler! No added Humidity! brand new! 2 fans/2 pumps/2 radiators!
22,050
Published 2023-06-23
The "cube" part or "water chiller part" of the unit is a re-design of a previous model (used in earlier direct and one-stage models). I reduced its height and widened the water holes to 9/64" (9 per tube) 36 in total.
a few cool things...
🟢 these units are 3-in-1 meaning that they can be run 3 ways... as "Direct" evap units (no radiators, 1 pump, 1 fan), "One Stage" indirect units (1 radiator, 2 pumps, 2 fans) or "Two Stage" indirect units (2 radiators, 2 pumps, 2 fans).
🟢 these units can double as air humidifiers. you just use without the radiators and use the cube part indoors.
🟢 these units can double as outdoor evap fridges. you just drop your items inside the cube part. (the air inside the cube stays as cold as the pad).
🟢 these units can be DC powered (using solar panels or batteries etc.) just use 12v DC fans and pumps.
👍 for an extra blast of cold air you can add ice or ice blocks to the tub! (temporary but effective while it lasts)
🔵💦 the 9/64" water holes give the pads a fuller more complete saturation (originally 3/32"). in other words, all 4 pads now stay fully saturated no matter how hot and dry it is outside (plus the holes will never clog).
**first half of video shows the unit and its performance (including lots of water, air and pad temps). that's followed by a quick talk-thru of how (and why) the whole thing works. and lastly i show a complete disassembly of the unit and show everything that's needed to make it. lots of details and specifics included.
*Best way to get the tubes inside the home is to place the unit just outside of a window and the "fan with radiator" just inside near the window. then use a small piece of 1"x4" lumber mounted in window with 2 holes drilled in it for the tubes. works perfect. just cut wood to the length of window, feed the pipes through the holes, drop wood in and shut the window down onto it. makes a good seal.
one last thing, it's very portable. the whole thing can be disassembled and put into the tub in about 2 minutes. everything fits (other than the table fan). then just snap the lid on the tub and you can easily take it with you (camping for example).
All Comments (21)
-
Man, that’s pretty badass
-
You really know how to keep your cool 🥶
-
I'm not an expert on this, but I have some ideas for consideration. I believe the radiator on the top of the cubicle unit isn't required since the water in the basin will be cooled as water trickles down the sponge. The water circuit could go like this: the water in the basin is pumped directly into the indoor radiator, and the water exiting the radiator can be pumped back into the top of the cubicle unit directly to wet the sponge and be cooled again. The basin should be insulated so sunlight and ambient heat don't warm the water in it. The efficiency might be improved using a larger radiator that allows greater flow of water through it coupled with a larger fan. Or to increase the water flow through the indoor radiator, you could couple both of the small radiators in parallel (not series) with a splitter of some sort. Thus the indoor fan can pull air through both of them.
-
Another brilliant invention ,thank you for sharing the detailed instructions of your experiments ,much appreciated .
-
Very very good video, thank you so much. Will make it in February.
-
Almost lost your video from my notification. Great video as always 👍
-
Very cool , thanks for sharing , God bless !
-
Great idea, thanks for sharing
-
You're awsome dude!
-
Quite interesting, Thank you. Have an elderly friend living in south FL. on 657$ monthly. Put in a small window unit for her bedroom so she can sleep comfortably. Electric bill is rising. Your craft should make a positive change in her life. Thank you, again.
-
What about pre-cooling the air inlet to the evaporative cooler? Using the water heat exchangers to reduce the dry bulb temperature before the evaporative cooling.
-
It’s mini model of a commercial cooling tower system. The filters act as the fills inside of a tower which the return water is dumped in the distribution pan from the top, the fans pull the heat from the water in the fills and is pumped back to the supply.
-
I live in Florida its like 90% humidity outside, you think something like this would work well enough? and or suck the humidity out of the house? Any idea on a DIY low power dehumidifier?
-
Thank you for sharing. i couldn't get cool pads or other materials cheaply in my country/region, so recently experimenting I've found several layers of 30-40% shade cloth works just as well as commercial cool pads. I'm thinking, folding /pleated them would increase the evaporative cooling surface area, similar to pleated window curtains. This is a cheap way to capture huge cooling surface area or very cheap compact units.
-
Would pre heating the air before it goes through the air cooler result in cooler water? Taking the air from a solar air heater may increase the effectiveness..?
-
I enjoy your channel. I realize you are in a climate that is a complete 180 from my 78% humidity lol. But a different video looks like it could work out for a little oasis while working outside. The one with the ice chest, 3 inches of water pumped through a radiator and returned back into the chest. You used some frozen gallon jugs to chill the water. I, have a whole bunch of little blue ice bags that came in shipped chocolate orders. Or even the little I think juice carton with ice in it would be nice to stick my face all up in front of lol. I just really don't need any more water in the air. It's thick enough 😆
-
Great content! I think there has been other mentions but how about some capacity testing? I live in the south Utah desert in a trailer and I'm curious what it would take using your setup. I have two swamp coolers on top I took down (water damaged ceiling, make the ceiling sag, contributes to mold growth). Would be awesome if you benchmarked by leaving one room unconditioned while running your unit in another room. Just some ball park numbers so you could roughly calculate the necessary scale of a system. None the less I love the tinkering and thanks for making interesting content. A little break from political shit popping up on my YouTube.
-
I think Youtube just ate my comment. Short version - awesome project, what was your approx component cost for this one?
-
Do you think there would be any benefits to insulating the water container and lines to further isolate the cool water from heat uptake except at the second stage (inside)
-
Could you run air through the indirect cooler and then through the direct cooler to make it even colder? Even below the wet bulb temperature?
