The people over at Green Power Science have whipped up this great video showing how to use Fresnel lenses to heat water. As they mention at the end of the video, your lens pointing at a black object will generate as much heat as a black object the same size as the lens, but I imagine this could make for some very interesting solar heating options.
Has anyone experimented with Fresnel lenses or any solar heating projects that could benefit from the ability to concentrate light like this? I’d be interested to hear! Feel free to post in the comments or on the forum.
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Where can I get a fresnal lens to heat my pool? Thanks Andy
well i hate to tell u this andy but im fourteen and i just recently tried to get a fresnel lense to heat a tea kettle and un fortunatley it does work now im not sure if it would help to apply directly to water to get one big enough to heat a pool im not sure well to answer your question i actually ordered mine over th internet
There are plans in the Utah desert to use Fresnel lenses to heat water and run steam turbines:
http://www.youtube.com/watch?v=4h9FLvj2ZJM&feature=related
The same thing has been done by Joe Holden who is working with a green energy living project:
http://www.sunsnest.com
This heat could also be used to run a sterling engine.