Hybrid Car – More Fun with Less Gas

looking for design tips - dont want to re-invent the wheel

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Posted by Tater on September 27, 2006, 1:27 am
I'd like to tinker with a small solar panel. I was thinking of building
something say 2x4ft with air passing thru a serpentine copper tube
attached to a sheet of steel painted black, insulated and such with a
piece of plexiglass for glazing. am I missing anything obvious? Just
want to see what king of output it might make for heating a garage at
45 degree latitude during a wisconsin winter. might eighter scale it up
or make multiple panels if promising.

Posted by waynel on September 27, 2006, 2:45 am
You will have to go larger than 2x4  to get much heat.  My 28x 56in put
out 2200 btus per hour. I have 2- 4x8 on my workshop. Schooner will
direct you to web site with pictures.  Wayne

Tater wrote:

or make multiple panels if promising.

Posted by SJC on September 27, 2006, 7:32 am

  If you look at the datasheet for Sunearth, you will see an average of
maybe 500 BTU per square foot per day. If you have 30 square feet of
collector, that would be 15,000 BTU per day for a 4' x 8' collector.
  I know there will be folks on here that want to put a finer point on
these figures depending on where you live and time of year, but this
would be a good starting point to gauge magnitudes of area versus
heat produced.


Posted by schooner on September 27, 2006, 10:17 am
 Here is the link to info on the panel that Wayne has been making:

Steel is probably not the best choice since it will hold the heat, copper
and aluminum would be best although copper will be rather expensive.  Copper
tube would also be rather expensive and would probably be thicker walled
than you would want.  Look at the link above for some ideas.  You could also
just go with a simple flat plat collector using an aluminum sheet with a
pathway under it for airflow formed with strapping or foam.

Posted by waynel on September 27, 2006, 11:01 am
 15,000 btus per day seems very low, I get 6000-7000 btus per hour with
schooner wrote:


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