Duration 29:57
Solar Powered Air Conditioner
Published 20 Sep 2019
A larger version of our desiccant based air conditioner attempts to cool our lab. Correction: The equation sheet, showing "Area of Duct" should have .175mm/2 squared, not the square root. Sorry for the confusion. Link to desertsun02 for his solar design - /user/desertsun02/featured Link to previous video - /watch/U82a4Tn4g_R4a #Solar #Cooling
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I always wondered why there was no civilian equivalent but then I figured nobody has a jet powered air compressor to feed the machine compressed air. But you found a way to do it without compressing the air! Lovely! ... 10
And thanks again for all the content, its always extremely inspiring. ... 27
This channel, more than any other informs so many of my structural and hvac designs..
Simply amazing, I could watch this channel every minute of every day - even 10 runs through the same video I'll learn some little thing, something less considered.
Youre responsible for so many redraws of my designs and I love you for it ❤
Never change. ... 12
1 insulate the duct that go in and out of the house.
you could use insulated spiro ducts with silencers and plenums so you have a more quiet system and also less leaked heat from outside.
2 make the swampcooler bigger and 2 stage it to reach even lower temps for the coolant for the exchanger.
3 stack the radiator in series on the bigger swampcoolers. saves on the 2 radiator fans.
i think you are getting close, it needs some balancing ... 774
Obviously much larger but the principle and set up was very similar.
Sadly my dad passed in 2002 so it was never brought to fruition but I have many fond memories of our time together. ... 43
You sir are not common. You’re exceptional. You’d never use a shower head like that. 299
Loved your video, specially ♥ the technical depth presented.
1. You should insulate your thin refrigeration lines. Low volume to surface area ratio on your lines means you likely are losing notable amounts of efficiency there.
2. You could get more evaporation if your radiator was at the bottom of your swamp cooler to heat the water you are evaporating with the fan. Minimizing the energy difference needed for evaporation = more evaporation caused by your fan. More heat causing evaporation means you'll have more cooling potential. Adding more heat here even through electrical power would be the quickest way to get more cooling.
3. As others have mentioned having IR reflecting glass likely is making your desiccant not absorb as much heat as possible. Normal glass would likely be better as it would stop losses due to hot air radiating away which is the main way to build up heat. Possibly could use aluminum/mirrors to focus more heat on it also like a solar oven, but you could just scale this up for the same effect.
3. Most commercial desiccant cooling systems use either use desiccant that is regenerated through compressor heat as you've mentioned. The main reason is a closed compressor system is not effected by outside humidity. A swamp cooler becomes near useless in high humidity environments. Wonder if just focusing on more solar heat & using an expansion valve for your desiccant solution would give you better performance that didn't care about the humidity. ... 27
1. condense the water of the second cooling tower and feed it as coolent into the third one. This way you get the water for free as well.
2. swap intake and outtake in the room. this way you dont suck in the cooled air again. So you allways get the hottest air from the top of the room. ... 172
Living in Zambia in winter we have sunny skies and need a very warm production space.
Great ideas! Some of which we are already using.
Love your channel. ... 1
One "human being" shower head. No other fauna based shower head will work. 44
You could also use column packing as well 78
Your first video inspired me to build a setup on my own based on your idea.
I came across the same problems.
I also change the diameter from DN 110 to DN 160. For the Bioballs I used another approach. To prevent them from forming a dense cluster I separated them in layers, 5 40mm balls in a layer, the layers divided by a stainless steel net.
I also noticed that when I turned off the water pump in the swamp cooler the air temperature drops even further (of course just for a moment because no water means no evaporation), so there can be too much water. In the next test I want to try out either reducing the flow or switching the pump in intervals. Unfortunately the summer is over and I have to wait till next year for further testing.
The test setup I am building is a simplified version of the one you where showing in the first video. To separate the cold from the wet in the exhaust air from the swamp cooler I am going to use an air to air heat exchanger (non enthalpy one).
As I said before unfortunately the summer is over and I can´t test the setup anymore but the good thing is the whole system is modular. So I can use the heat exchanger I already bought to build a ventilation system with heat recovery for the winter.
Whilst I was looking up air to air heat exchangers I saw some nice DIY ones made from PVC plumbing pipe and oversized drinking straws. Which would made them cheap, non enthalpy and corrosive resistant.
The small solar heater makes me happy, for 12 years I worked at a company building Solar heating equipment.
I also worked for a company that build ventilation systems with heat recovery, hence the other idea. ... 5
Thank you for all the detailed and simple explanations in your videos! ... 31
One thing I would like to try is using a liquid-to-air heat exchanger (radiator, basically) in the cools-the-room-air tube (sorry, don't know what to call it) to keep the desiccant sealed so it doesn't need dehumidifying. Dehumidification of room air will still occur (though probably not as efficiently) by way of condensation on this radiator, which will need to be drained off.
It may not be as efficient, but it would simplify the process by eliminating the solar collector and by possibly allowing common water to be used in the coolant loop since it would then be in a closed loop. ... 1
I can't wait till you do another cool project, your technical instructing is super informative.
Thank you, Thank you, Thank you! ... 11
I am a HVAC&R contractor. Would like to see it tested at or near to ASME standards ... 33