Posted by Paul on September 5, 2005, 9:39 pm
www.Solarcooking.org is a good site.
I particularly like the Fresnel parabolic.
Posted by Dan Bloomquist on April 1, 2005, 7:24 am
Morris Dovey wrote:
Great in the summer. Wood is what counts through the seasons.
Consider what the primary fuel of India is....
Posted by John W. Hall on March 30, 2005, 4:14 pm
On Tue, 29 Mar 2005 19:39:31 -0800, "Brian Sanderson"
OT: Reminds me of an interesting store window display I saw in Milano
years ago - a drum with aluminised Mylar sheet. On the back, a small
motor driving a crank at about 1 rev per 3 seconds. Crank driving a
simple bellows connected to drum. Result: a large zoom mirror,
continually zooming and moozing.
Cochrane, Alberta, Canada.
"Helping People Prosper in the Information Age"
Posted by G. R. L. Cowan on March 30, 2005, 5:58 pm
Brian Sanderson wrote:
At http://engnet.anu.edu.au/DEpeople/Keith.Lovegrove/STG/basics.html a
long article about solar concentrators. It is illustrated with photos
of real hardware, including stretched-film mirrors, but says,
The membranes were made from aluminized acrylic film.
Unfortunately this film proved not to be very durable,
which was a major factor in the plant ceasing operation in 1990.
--- Graham Cowan, former hydrogen fan
boron: how individual mobility gains nuclear cachet