Thank you for your good video ! ! ! Inside, I hang up on each window a 100 Liter black trash bin plastic bag, that's all, no ventilator, nothing, and I can feel the température increase. Which is enough as a "proof of concept" for me: it works. I'm waiting for your next one!
Breanne - great idea! I did the same thing last year in 1 window of my house as proof of concept. I taped it around a metal wire frame from political yard signs after the election and the candidates didn't pick them up! My issue is that I have only one window in my entire house facing south and it is very small (laundry room) and it was in a corner to the west of the house and is shielded from sun after noon. So I tried the largest east facing window, which was in the garage. I found way too much leakage around the 2 car wide garage door to see any impact. - John
When you build your bigger unit for house heating...encase your heating box with 4 inches of insulating foam board on back, sides and top with all joints and corners spray foamed and aluminum taped. My 6'x6' unit outputs 95C of heat when sunny.
Very interesting - I do like the more systematic approach. Because nobody really wants to add an additional source of hot air to a house that’s already at 25°C. A midwinter low temp test - showing how after heat losses to the environment affect the efficiency/usefulness of an actual installation in use would be fascinating and useful.
Matthew, I was quite excited to see your approach to "qualifying" the effectiveness of the air heater! I would suggest that you move the electric heater to the inlet side of the box to better simulate the conditions of the entire system. You could also do that outside but cover the face of the heater from the sun (with a gap between the glass and the cover). Otherwise, the entire set-up is a great way to quantify the benefit of the technologies used in the box! - John, a retired thermal engineer
Thanks, I will give it some thought. For now tho I've put the solar air heater in the shed and I'm concentrating on my heat pumps as they seem better suited to our climate. In direct sunlight I don't need heating (in November) as the windows are enough to warm the house. So solar thermal air heat may be too much. We will see + I may do a hybrid heat pump with solar thermal to heat the cold side.
Mr. Engineer, could you say something about my setup I plan to do. Solar collectors on south wall of house with ducts going into unconditioned attic. There will be condenser of air to water heat pump which would work only during a day heating buffer tank since heat pump works only in warmest part of day plus heat from solar collectors I expect to increase efficiency of my air source heat pump more than by 30 percent
@@andreycham4797 Andrey, without crunching any numbers on your installation or what i planned, I have to admit that I had planned to do the same thing - run the inlet and outlet pipes thru the overhang into the attic, in my case, over the garage. I am the product of analysis paralysis. I bounce back and forth between solar hot air (simple, cheap, can be handmade, but can't heat the house) to solar PV cells ($$$, unsightly, etc, etc) and also wind turbines ($$, many designs (including my own), etc, etc). Since thinking about the three, I am getting closer to choosing a VAWT. It's something that I could use my own design, buy someone else's and if worse comes to worse, I can use the power conditioners and storage for a PV system. Without cutting 4 or 6" dia holes in my house. Lastly, if I wanted to pursue using heat from the sun, I think I would design a solar concentrator to focus on a short but larger dia copper tube. That would have smaller tubes flowing into another horizontal manifold in the house. The bottom of that manifold would have a return drain back to feed condensed liquid into the horizontal manifold outside. A small amount of Isopropyl Alcohol inside the tube would boil (vaporize) in the concentrated solar manifold, vapors traveling up and into house where the it would condense, releasing energy and transferring it to the house. Of course, details to make it all work are purposely left out for you to work out. Also consider sand battery inside to exchange liberated thermal energy to air. Again, put on your thinking cap. Good luck and stay warm, which is another reason I am leaning toward wind turbines to be able to recoup costs year round
You should calculate the COP, taking into consideration the electric power input from the fan.
Thank you for your good video ! ! !
Inside, I hang up on each window a 100 Liter black trash bin plastic bag, that's all, no ventilator, nothing, and I can feel the température increase.
Which is enough as a "proof of concept" for me: it works.
I'm waiting for your next one!
Breanne - great idea! I did the same thing last year in 1 window of my house as proof of concept. I taped it around a metal wire frame from political yard signs after the election and the candidates didn't pick them up! My issue is that I have only one window in my entire house facing south and it is very small (laundry room) and it was in a corner to the west of the house and is shielded from sun after noon. So I tried the largest east facing window, which was in the garage. I found way too much leakage around the 2 car wide garage door to see any impact. - John
When you build your bigger unit for house heating...encase your heating box with 4 inches of insulating foam board on back, sides and top with all joints and corners spray foamed and aluminum taped. My 6'x6' unit outputs 95C of heat when sunny.
Very interesting - I do like the more systematic approach. Because nobody really wants to add an additional source of hot air to a house that’s already at 25°C.
A midwinter low temp test - showing how after heat losses to the environment affect the efficiency/usefulness of an actual installation in use would be fascinating and useful.
The extract fan is 17w so that makes it a COP of 13x
Nice
I was watching lots of these videos earlier this year. I plan to do one or two also.
Matthew, I was quite excited to see your approach to "qualifying" the effectiveness of the air heater! I would suggest that you move the electric heater to the inlet side of the box to better simulate the conditions of the entire system. You could also do that outside but cover the face of the heater from the sun (with a gap between the glass and the cover). Otherwise, the entire set-up is a great way to quantify the benefit of the technologies used in the box! - John, a retired thermal engineer
Thanks, I will give it some thought. For now tho I've put the solar air heater in the shed and I'm concentrating on my heat pumps as they seem better suited to our climate. In direct sunlight I don't need heating (in November) as the windows are enough to warm the house. So solar thermal air heat may be too much. We will see + I may do a hybrid heat pump with solar thermal to heat the cold side.
Mr. Engineer, could you say something about my setup I plan to do. Solar collectors on south wall of house with ducts going into unconditioned attic. There will be condenser of air to water heat pump which would work only during a day heating buffer tank since heat pump works only in warmest part of day plus heat from solar collectors I expect to increase efficiency of my air source heat pump more than by 30 percent
@@andreycham4797 Andrey, without crunching any numbers on your installation or what i planned, I have to admit that I had planned to do the same thing - run the inlet and outlet pipes thru the overhang into the attic, in my case, over the garage. I am the product of analysis paralysis. I bounce back and forth between solar hot air (simple, cheap, can be handmade, but can't heat the house) to solar PV cells ($$$, unsightly, etc, etc) and also wind turbines ($$, many designs (including my own), etc, etc). Since thinking about the three, I am getting closer to choosing a VAWT. It's something that I could use my own design, buy someone else's and if worse comes to worse, I can use the power conditioners and storage for a PV system. Without cutting 4 or 6" dia holes in my house. Lastly, if I wanted to pursue using heat from the sun, I think I would design a solar concentrator to focus on a short but larger dia copper tube. That would have smaller tubes flowing into another horizontal manifold in the house. The bottom of that manifold would have a return drain back to feed condensed liquid into the horizontal manifold outside. A small amount of Isopropyl Alcohol inside the tube would boil (vaporize) in the concentrated solar manifold, vapors traveling up and into house where the it would condense, releasing energy and transferring it to the house. Of course, details to make it all work are purposely left out for you to work out. Also consider sand battery inside to exchange liberated thermal energy to air. Again, put on your thinking cap. Good luck and stay warm, which is another reason I am leaning toward wind turbines to be able to recoup costs year round
Would it not be simpler to measure the delta T, and the volume of air?
interesting, how about VOC outuput? That mesh inside and paint might emit toxic chemicals when heated.
Please describe how you built this solar air heater. What is inside the box?
Update please! Is the front plexiglass? Would that be affected by UV from the sun? Btw that’s an awesome shirt.
you should clean up man, its ridiculous 😀
If a cluttered desk is a sign of a cluttered mind of what then is an empty desk a sign? - Albert Einstein
Ur contributing to global warming 😂. Cool test
This is very inefficient and badly built design.
And this camera movement gave me headache.
No good idea can ever come from such a pigsty!
good, if i am not lazy i want to make one.