DIY Solar Panels - Air Heaters Made of Pop Cans
Intro: DIY Solar Panels - Air Heaters Made of Pop Cans
It is really easy and simple to build cheap pop can DIY solar panels for supplemental home heating, by re-using scrap parts and empty pop cans. Pop can diy solar panels are actually thermal panels that heat and recirculate the air inside the room. Water, or any kind of liquid is not used here, which makes these panels resilient to extremely low temperatures and winter freezing accidents.
Solar absorbent / collector is crafted using empty beer and soda aluminum cans, painted in matte-black paint resistant to high temperature. The upper part (cover) of cans is specifically designed to provide more efficiency in heat exchange between the cans and the passing air.
Housing for solar collector is made of wood (plywood 15mm), while its front is 3 mm (0.12 inches) Plexiglas/polycarbonate (you can use tempered glass as well). The back of the case set is made of 20mm rock wool (or styrodur) insulation.
Checkout additional details on : https://www.freeonplate.com/how-to-build-diy-solar-panels-out-of-pop-cans/
37 Comments
gregwest77 2 years ago
JanP42 8 years ago
I made a similar system, but also with a very intelligent controller (with a webserver on a Raspberry PI). So you get a graph on the temperatures, and it is controllable by a smartphone. I put the pictures on www.solarair.livotel.com.
TrevorClibery 8 years ago
Hi
Can anyone tell me whether this works best *outside the building and feeding in*, or are they just as good *inside* on a window sill? Also, is it best to suck in air from inside the house rather than outside?
Claudine KateB 8 years ago
ayhem.nawafleh 9 years ago
can i know whits the benefit for soda can and if i make it just almunum pipe
mnr5fh 9 years ago
ntense99 9 years ago
Wow, what a nice large solar air heater! I designed mine using a different principle - mounting on the inside of my window. However wow, yours can be built and scaled as large as you want! mine is limited by my window size. Here is my setup if u r interested: https://diybarrelstoveoutdoorfurnace.wordpress.com/2014/12/28/diy-window-mount-solar-air-heater-presentation/
Riverman1111 10 years ago
I've been checking out various designs and really like yours.
A couple questions:
1) Is there are reason not to 'chain' the cans together so they are all one long connected tube, with u type joints? Would over heating be a problem?
2) I live in Canada so if I can store the heat for use after dark that would be ideal. So, have you thought or known anyone to try including a radiant system within the pop can heater?
Thanks for your thoughts.
DB28704 9 years ago
I believe the idea behind orienting them in this manner is to keep as much volume in one, self insulating mass; therefore reducing the external surface area that would lead to heat loss. When they are run in parallel, the sides that would normally loose heat in a continuous chain are in face adjacent to other collectors.
I'd imagine the more "square" the structure is, the more thermally efficient it would be.
SabrinaR 9 years ago
I wonder what health risks might come from breathing the air that the hot aluminum cans produce. Or is aluminum dangerous only when you burn it? Like when you cook with foil or smoke out of a can.
SabrinaR 9 years ago
I wonder if you could use water as the insulator to keep the panel warm through the night. Collected rain water could be added at the same rate of evaporation, through a self watering dog bowl apparatus like an upside down liter bottle with the bottom cut off placed at the water level. The evaporated water could be collected. But I wonder if this would have issues in temperatures below freezing.
richard.moody.731 9 years ago
When I take the air from in our home (back room in my basement at 15.5C ) and through the pop can heater , it comes out at up to 34 C . I fine it does run most the time at 24C to 28C ..I also have a click button that turn the fan on when the can reach 43.3 and shut off at 33.2 ..That button is in the unit mounted on a top can center.
treehouse24 11 years ago
kirkb150 11 years ago
Brick would only be the right choice in situation where you wanted to STORE the heat of the day and release it after the Sun is no longer warming the "system". I think this is awesome... If I didn't have side hinged windows I'd like to try this. Might be interesting to replace an entire window with one of these...
calskin 12 years ago
I have a couple questions though.
I live in Canada, and we get temps down to -40. Would this still put out "hot" air?
I was also thinking if you put a reflective surface like a mirror or space blanket on the back of the inside of the box, you could push the temp up even further. Is there any reason you wouldn't do that?
I would be interested in knowing if you were to slow down air movement in the cans by using smaller holes so the air had more contact (wrong term I know) with the sun to make the air hotter, could you push the performance even further...
hellgas00 11 years ago
calskin 11 years ago
Mladen_solar 12 years ago
2. There is no space between cans for light to pass, so mirror in the back of the cans has no purpose (there would be no light to reflect from behind...). If you have spare mirror and open space around solar panel (and if it is low mounted), you can position mirror near it and reflect additional volume of light on panel. There is video on Youtube where some guy test this, and it have couple of degrees temp. increase...
3. "could you push the performance even further" - this is true in terms of max temp., but not in quantity of heat collected from device and added to living space. Yes, by slowing air flow, you will gain higher temperature, but less air to transfer it. There is calculation of volume of heat (energy) received from this kind device on net, where air temp, and air volume are included. Your goal is not to have small volume of air with max temp, but to heat the room as much as you can during sunny hours. Your goal is to transfer as much collected heat using max air-flow, into the room as possible. All heat (energy) which remains in collector and not transferred into the room is NO GOOD. :-)
I apologize for long sentences and bad English...
calskin 12 years ago
I didn't realize there was no space between the cans. That makes sense now.
efahrenholz 12 years ago