Over the past month I've put together a web page describing a passive
solar heating panel capable of providing 100% of the heat needed to
maintain a comfortable temperature 24/7 in a conventional structure with
reasonably good insulation and which is reasonably snug. The panels need
to be installed in unshaded south-facing walls.
These panels work reasonably well in overcast conditions and will
produce heat whenever there's enough sunlight to read a newspaper. They
work unreasonably well in clear-sky direct sunlight.
Five years' experience in central Iowa indicates that each square foot
of panel area can heat ~125 cubic feet of air with enough additional
heat for storage to maintain that much air at a comfortable temperature
for more than a week of completely dark days.
Since I began this project in 2001, I've had some good advise from some
of the folks here at alt.solar.thermal, and this is probably as good a
time as there will ever be to acknowledge that help was essential to the
overall project success. You guys know who you are - thank you!
The web page will remain a work in progress for some time. If you find
the content interesting, I suggest linking to the page rather than
downloading a snapshot - and I ask that you not re-publish the page or
any of the content until I have it in final form.
The page is at
http://www.iedu.com/Solar/Panels
--
Morris Dovey