90. Solar air heating: We build a DIY version and check out SolarWalls
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- เผยแพร่เมื่อ 28 พ.ย. 2014
- We build a simple DIY solar air heater and explore what a scaled up version of this technology looks like. We made these with students from schools in Alberta and it was a great hands-on project for the students. It also serves as a opportunity to learn more about scaled-up solar air heating which is being used to heat car plants and other major complexes. Not only do solar air walls provide free heat they can also supply huge amounts of fresh air, which if you are a car company using paints and other chemicals is a big help as well!
This technology is simple, accessible and makes a ton of sense in many applications. The only reason we can think of that this kind of technology is not used everywhere is it's not very sexy! Learn more in our GreenEnergyFutures.ca blog at www.greenenergyfutures.ca/epis...
Some tips for anyone contemplating doing something like this: Double glazing is recommended for cold weather climates - I use double wall polycarbonate sheets, something like a Suntuf corrugated panel would be fine in less cold areas. You should be drawing intake air from the living space of the home/dwelling, flow through the heater, and then back into the living space. A 1' thick piece of polyisocyanurate rigid insulation painted flat black (that stuff won't melt in high temperatures) works best as the backing. Sufficient size is important, a 4'x8' (or something about 32 sq. ft.) is about the minimum for efficient heating. A fan to provide sufficient air flow but not too much is best - usually installed on the outlet side and optimally would have variable speed and temperature controlled on/off modules. Although well designed passive systems do work too. A backdraft damper on the intake to avoid heat loss at night is a good idea. Mount at a high angle, or even vertical, to catch most of the winter sun - and less of the summer sun.
And finally, using black fiberglass or aluminum insect screening is a heck of lot easier and typically works better than hundreds of aluminum cans! Buiditsolar.com and simplysolar.com are excellent sources for more information.
Excellent tips, Chuck, every one of them!
It could be my weak internet signal but I couldn’t get either link to open in Safari.
Thank you. These are great tips.
this is soooo cool! Really a great idea! Thanks!
Using the metal lath is a great idea. Adding an aluminum screen wrapped around the lath would add more heat to the system. Great job.
Excellent video! Top notch information.
@@greenenergyfutures I cannot believe someone has not taken this technology and mated it with thermal mass retention.
Good job. I liked workaround time saving e.g. Gluing cans to board instead of to themselves
Awesome!
I would have like to see how the unit connects to the garage and what that connection looks like from inside the garage.
Very helpful, looking to make some for a converted cow barn where we host many people each day...
thnks for such educative projec but having collected the heat what is importance ,i mean of that heat ?
Did you drill holes in the tops of the cans as well, or just use the existing opening?
How well does this hold up in an Edmonton winter?
A few things I would do to better the unit...is 1 do not put so many vent holes in that's rushing the cold air in 2 would of put the vent holes where it would drew cold air from the garage...2 paint the back board of the box black first every crack matters... 3rd the vent holes would allow little critters in so I would get some kind of screening to keep them out... Seal the corners and insulate the sides and bottom and top from the colder air and leakage of warm air...
If you found a way to attach the fan to a small solar panel (the kind used for garden lighting or water pumps), then it could be entirely passive. Nice idea.
I use that set up in my greenhouse, 15 watt solar panel running 4 old computer fans. They blow hot humid air from the roof of the greenhouse down "temporary plastic downspout" and into pipes under the soil. They could work the same way in a solar hot air system.
Build one of these recirculating through a thermal mass and it will heat the structure all night too.
Thermal mass?
@@jamielc3437 Like a bin full of pea gravel, rocks or cob. Similar to a rocket mass heater. Many videos about them in TH-cam for wood fired RMH’s.
Hi are you drawing cold out side air into the panel?
And I do hope your drawing the incoming air from the inside of the house as you did not talk about the bottom intake
Cool
Just so you know Plexi Glass has a UV rating where Glass does not. I used Temper glass for mine
On the Avasva you can count on professional help with problems and technical support.
And some good advice at the end of the video😇
might want to update your monologue at 2:37 where you change and call it a solar hot water heater, small misstep, otherwise GREAT STUFF
Why not double pane the plexiglass?
Make sure you insulate all the walls of the box.or you will cook the wood . This will give the heat no option but to go for the easy way out, the Airflow,. and speed of air flow are important. Faster get less heat slower get more heat.
Will the differential Internal to air temperature of glass panel be able to cope with the difference. Ie Oven glass doors can. Ordinary glass may not..!
What is the name of this fan and which company?
Hi, I have constructed two panels on my own. I have instaled them on the roof. The two panels are connected and drag the air from one room and pump to another as one. The problems is that on the way from the top (hotest) point of the panel to the fan (approximatety in 2.5m) it loses 70°C of heat. I have inserted a thermo snesor inside the panel, so on the top of the panel the temperature is 106-107°C, while the temperature infront of the fan is 30°C. Did you face any kind of similar problems in your panel's work? What may couse that big heat lost in your oppinion?
WOW!!Then why not connect it straight to the wall and not roof that way clearly you will get the winning energy?Maybe the pipes or tube or how we call it is not enough thick or energysaver or you might have somewhere leak and you dont know.Example birds over the roof or some icerain hit the pot or over heat temprature and cant stand high level of heat with those pipes?
Guys, doesn't it makes more sense to take air from the inside, not from the outside? Please share your thoughts on this topic
AJ Dude the air from outside is heated so I don’t see my ch difference
Not like wood stoves drawing in outer cold air
Yes, it would be better to take colder air out is your house and heat it. Just like in a car, heats and cools faster that way instead of using outside air
What residential optiins exist?
I would have thought it was obvious to put two metal corrugated panels, rather than hundreds of cans.
Hello guys. Great video. Just on thing is not clear if the sun is up and heat is created and leaded to certain place what about at night it can't work and night then?Only by day That's what I understood but please correct me if I am wrong.
Max power is 1 Kwh for each square m. Since that thing won't follow the sun all day you get around 30%. So bigger pannel = more heat. Those can's looks nice but won't improve surface much. Also won't store heat for more than minutes so use them or not is up to you. About paint and plexi gases ... That paint is made for stoves so no worry about too much heat and you will never get that much heat to melt plexi.
the ventilation speed? the space applied to? the difference of temperature achieved?....
@Will Swift As one may see, no answer was provided, unfortunately...
What is in Fahrenheit or cliche in the USA
If you get those cans out of the way, it will circulate air better without the fan.
I have one of these they work OK when the sun in shining and it's say 10C, now bring it down to -30C and they don't work. So when you really don't need much heat they are OK but when you really need heat forget about it!
would it keep it at least around 5-10 degrees if it were running when it was that cold? i'm looking to build this to to just keep my shed above freezing but doesn't need to be too warm
@@KatBurnsKASHKA I was wondering if this could help keep a crawl,space under a mobile home warmer to keep the pipes from freezing or help minimize the amount for energy spent on keeping pipes warm and from freezing….
@@Abeaness It would seem to be helpful. As long as the space is fairly well enclosed and perhaps Insulated with styrofoam. Any increase in temp under the house would help reduce energy consumption. And you could also make multiple units.
Do you have any idea what gases the black paint and the plexiglas will produce over the next five years when exposed to the hot sun? Is it really a good idea to feed these gases straight into the garage for the occupiers to breath? Have you given even a moment's thought to the health implications of a set up like this?
With just a little more effort, you could have kept the air in the cans completely separate from the painted sections, and avoided any problems.
Mandolinic
Mandolinic , use food coloring if you don't want to use paint. Kenkoy.
What about the solar wall in summer?? Will it become a problem?? I mean by overheating the house during the hot season.
You cover or remove
Try bean cans they get hotter.also microfying glass extra metal heat..
What do you do during the summer?
Cover it
One problem is Black Mold inside the cans. Or BPA.
Lol true
Need some Bugscreen below.
To control the amount of heat, just shade a portion of it.
can it be used for cooking
No. You want a solar concentrator instead for that.
Why not soup cans?
A little cauking at the joints and under that plexiglass would have gone a long way.
Why do you need cans at all? Why not just paint some plywood black, under the plexiglass?
This is actually NOT to correct way to circulate the air. Remove the tops completely and flare the base of each can resembling a pin wheel. The idea is to slow the air flow long enough to super heat the air and the pin wheel cuts in the base of the can causes the air to swirl in each can instead of just passing through the can
Interesting idea, have you tried it? It theoretically makes sense. But how would one fasten the cans together?
I’m guessing this was Celsius
This guy looks like the guy from just for laughs or just for gags
What does these people do when it's summer ^^ ?
Ponsate they turn it on at night to cool the building!
My Solartracker Mount Steel Robust ➡️ th-cam.com/video/X0lmYFwOq3U/w-d-xo.html
Instructions from the Avasva site are perfect for beginners.
Sooo…..it LEAKS like a sieve. GOT it.
sponsored by shell thats like healty kids food program sponsored by Mc donalds...... hard to take you seriously like this
exactly
Somebody might ‘Put a Patent on it?’ Lookout USA.
we are looking for people who want to make the solar heaters to sell to others, we are willing to fund the project. Is anyone is interested contact us
Hello. This was a fantastic video. I am interested by the project but wish to start learning how to build one. I would use the heater to dry/dehydrate food. I am in West Africa. What do we have to do to be part of your project? Thanks.
What region are u wanting these to be manufactured?
He kept calling it a "solar hot air heater". No, it's a "solar air heater", or even a "solar cold air heater". It heats cold air, making it hot. You don't need to heat air that's already hot.
No, YOU don't need to heat hot air. some of us like HOT.
Come on man, ditch the stupid alum cans and spent a few bucks on real thin walled pipe... He should have completely cut out the bottom of the cans instead of 4-5 holes for much better air flow.... or use thin walled pipe like I said for a few bucks. Also use 2 big fans in a push pull configuration. a Thermostat on/off auto switch installed would be nice.
im with u on this! AND how are they all working? still NOT! i bet. i did something like this and one of the problems was it got damp and latter Black Mold! so i did away with it and spent a bit more $ for a Closed loop system. if interested look me up at Guilt Free Hot Water, don't worrier nothing to sell but get the right stuff and do it Right!
I’ve also seen one of these built using pennies glued to the inner surface and spray painted black with charcoal grill paint.
When you say ‘thin walled’ pipe do you mean copper pipe or conduit tubing? What diameter pipe do you suggest? I presume smaller pipe would increase surface area. Perhaps the refrigerant piping from an old air conditioner? I have one that still has the aluminum fins. Maybe I’ll make one from it to see how it performs.
Be awesome to grab some used black plumbing pipe.. Got to be wasted stuff out there somewhere.. Wonder if filling with water , might even add a longer heat timeframe..
The soda can thing is possibly the worst design of these heaters out there. Its cute n trendy, and is a sub-par material and design.
not going to work
Некоторые банки помятые взяли, неаккуратно получилось. Некрасиво. Палец вниз! Понятное дело, что и так работать будет, но это не по нашему ...
I feel sorry for the Alberta students being subjected to this type of disinformation and faulty science. If the solar collector needs a circulation fan, the whole design should be scrapped and measuring the temperature of the collector is meaningless. If they measured the volume and temperature of the air it produces, then they would be telling us something of value.
Yeah I was wondering what the purpose of the fan was...
@@ThorsteinnSverrisson Right! If it is properly designed and built, convection should be all that is needed to circulate the air. If it needs a fan, there something wrong with the design.