Posted by Hans Wolfenstein on December 11, 2010, 2:52 pm
I saw lots of video materials related to this, most of them based on
Fresnell lenses or parabolic mirrors.
Does anybody here has some experience with this or with water heating by
using concentrated solar radiation ?
Posted by Morris Dovey on December 11, 2010, 8:02 pm
On 12/11/2010 8:52 AM, Hans Wolfenstein wrote:
Only a small amount - photos at the link in my sig.
I fairly sure there are plenty of others who've had more experience.