Comments on: DIY Solar Water Heating Using Fresnel Lenses

By: Justin

Justin — Fri, 07 Dec 2012 00:24:37 +0000

Maybe build a black, external, heater tank – using the lens – for the pool. The water would flow into and out of the tank constantly so that the tank doesn’t get hot enough to burn. You could use a passive design that some home water heaters use.

By: prakash t

prakash t — Tue, 16 Oct 2012 05:27:23 +0000

i am me student doing project on fresnel lense water heater system plz inform me abt the piping mtrl which can sustain that heat

By: prashant kapurkar

prashant kapurkar — Tue, 24 Jan 2012 07:45:50 +0000

i am student of ME(RES) MPUAT, Udaipur, India. i am doing project on fresnel lens concentrated solar water heater cum distillation unit. i need some review literature related to this. can u help me about that.

By: james wilkerson

james wilkerson — Sat, 05 Nov 2011 16:12:54 +0000

the lenses on old projection big screen tvs include a fresnel lens. most times you can get the old tvs for free when they are ready to discard but we have the obligatory responsibility to dispose of the rest. its still MUCH cheaper than buying from suppliers. this is the only way i know to afford to get enough of them to do the trick. maybe you would want to focus them on a type of ‘solar collecter’ and then use a slow moving pump. a 4 by 8 collector should handle 720 gallons by itself.

By: Gerald

Gerald — Mon, 26 Sep 2011 15:06:12 +0000

Rear projection TV’s use a huge fresnel lens to display their picture. If you keep an eye on craigslist under “free stuff”, people are giving away their old ones all the time. Just a thought.

By: Mark

Mark — Sat, 17 Apr 2010 12:03:12 +0000

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.

By: coulson

coulson — Tue, 15 Dec 2009 16:34:46 +0000

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

By: Andrew DeGaust

Andrew DeGaust — Fri, 20 Nov 2009 01:38:11 +0000

Where can I get a fresnal lens to heat my pool? Thanks Andy