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Posted by dvandorp@gmail.com on September 21, 2006, 12:57 am
 
Hello,

I'm totally new to solar adventures and have been reading home power
and Gary's website (builditsolar).

I've been reading with great interest about solar air collectors and
figure that might be a good place to start in terms of DIY
construction. However, I don't want to cut holes in the south face of
my house. I do have room on an east side *beside* the house. Any clues
as to a design where I could have inlet and outlet ducts on the bottom
of a collector both on the same side? Is it feasible to use insulated
ducting to run to the house from the collector?

I'm from Manitoba canada so our winters are pretty cold.

Thanks,
Darryl


Posted by darrylvan on September 21, 2006, 9:57 pm
 
No responses :(

I'll try again. Is it practical to build a solar air collector that
would have to run some ducting outside to get to the house? Is insulated
ducting ok?

Thanks.


dvandorp@gmail.com wrote:


Posted by schooner on September 21, 2006, 10:03 pm
 Yes, should work no problem if you drive the unit with a fan.  The units we
have built all have the in and out at the bottom.

Here are a couple pics of the panels:
http://www.atlanticenergy.ca/solar/101_4053.JPG
http://www.atlanticenergy.ca/solar/101_4273.JPG

The use a collector box top and bottom with aluminum 3" flexible ducting as
the collector plate.  Bottom box is split so inlet and outlet are separate,
air flows up 10 of the ducts and down the other 3 and out.

I can get you the specifics of the fan we use if needed but it drives 150cfm
of air out the 5" outlet duct and is attached to the 6" inlet.

If you use a short run of insulated 6" ducting in and out you should be
fine.  Might just need a slightly larger fan to compensate to have slightly
less airflow.



Posted by schooner on September 21, 2006, 10:12 pm
 This picture shows the larger down outlet pipe on the right.  We have since
change the design to use the normal ducting to do the return but either
method will work.  http://www.atlanticenergy.ca/solar/101_4053.JPG

Again the only downside is the need for a fan as you wont get the thermal
airflow that comes from bottom to top panels, however I think to get the
full benefit you need a fan anyway so as to drive enough air through these
panels, otherwise heat is just lost through the glazing.

On a clear day in winter these units will give a 35-50F temp increase (~65F
in from basement to ~110F outlet temp) with ~150cfm airflow on the 5"
outlet.



Posted by schooner on September 21, 2006, 10:06 pm
 Just a further follow-up to that last post, you could mount the panel on a
slightly tilted stand as well, so it is not even attached to the house and
also the slight angle will help you get more direct angle to the sun.  Can
also rotate it for the best angle to catch the most sun for your area.

PS - I am located in Nova Scotia.



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