Posted by JERD on July 16, 2007, 8:27 pm
I am wanting to construct a solar air heater (not hot water) to mount on the
roof of my house.
What is the best glass to use for this? I have seen some commercial units
manufactured with a 'dark glass'.
Is there a better alternative to glass?
Any (URL) pointers to home made units?
JERD
Posted by Trygve Lillefosse on July 17, 2007, 1:55 pm
wrote:
>What is the best glass to use for this? I have seen some commercial units
>manufactured with a 'dark glass'.
Do not think that dark glass is a good option, as the glass itself
will stop a lot of the radiation. So you end up with a wery hot glass,
but the inside will not be that hot.
You should have a glass that lets trough as mutch radiation as
possible, so that the heat becomes trapped after it passes.
--
SEE YA !!!
Trygve Lillefosse
AKA - Malawi, The Fisher King
Posted by J G M D on July 19, 2007, 10:42 pm
http://www.theworkshop.ca/energy/collector/collector.htm
i hve built a 90 and 288 can model work great!!
20C going in over 70C coming out mid winter in Nova Scotia
the whole msite is good
Gerry
> wrote:
> >What is the best glass to use for this? I have seen some commercial units
> >manufactured with a 'dark glass'.
> Do not think that dark glass is a good option, as the glass itself
> will stop a lot of the radiation. So you end up with a wery hot glass,
> but the inside will not be that hot.
> You should have a glass that lets trough as mutch radiation as
> possible, so that the heat becomes trapped after it passes.
> --
> SEE YA !!!
> Trygve Lillefosse
> AKA - Malawi, The Fisher King
Posted by Trygve Lillefosse on July 20, 2007, 1:57 pm
>http://www.theworkshop.ca/energy/collector/collector.htm
>i hve built a 90 and 288 can model work great!!
>20C going in over 70C coming out mid winter in Nova Scotia
Impressive.
I get tempted to try a project like that.
If so, I guess I should include a small solar panel conected directly
to a small fan. This because I would like to get the heat into the
basement, where I already have a heatpump, so that convection can lead
the heat upwards.
Only thing is that the cans have a refound of NOK 1.-, wich is CAD
0.18 / USD 0.175
Thinking about it, I have a beasement window where I could get a
couple of pipes trough. Not sure about how much sun it gets though.
--
SEE YA !!!
Trygve Lillefosse
AKA - Malawi, The Fisher King
Posted by Morris Dovey on July 26, 2007, 10:01 pm
JERD wrote:
| I am wanting to construct a solar air heater (not hot water) to
| mount on the roof of my house.
I'm curious as to why you'd want to mount it on the roof of your home,
since you'll need to coerce the air from where it's warmed to where
you want it - and because the default orientation (sloped or flat to
match the roof pitch) will keep it in operation year-round...
| What is the best glass to use for this? I have seen some commercial
| units manufactured with a 'dark glass'.
|
| Is there a better alternative to glass?
I think so, but then I'm located in an area with occasional large
hail. My preference is for twinwall polycarbonate.
| Any (URL) pointers to home made units?
I'm not sure that these will fit your criteria for "home made", but
they may provide a bit of food for thought - at
http://www.iedu.com/DeSoto/SC_Madison.html you can see photos of
construction and installation.
There are links at the page below to other information you may find
helpful/interesting.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
XML site map
>manufactured with a 'dark glass'.