Uploaded time: Oct 19, 2009 03:55 PM
This large spot Fresnel lens can be used as a direct heater focused on copper coils with active fluid circulation. This is the only reasonable option for heating a swimming pool with a Fresnel Lens. Pointing the lens directly at the pool water does not work. This requires a computer hard drive water cooling kit or regular copper tubing.

This is a large Fresnel Lens focused on a copper tube with a 12 V pump (powered by two 6 watt solar panels) with water circulating through the unit. Water, seven gallons, was raised from 63 F to 106 F in one hour. It is not super efficient as heat is lost at the open top of the glass tank. This is designed to illustrate one method of solar heating a swilling pool with a Large Fresnel Lens.
Connect it with sun following mechanism and set some termo circulation pipes under it. Free heat energy through whole the year. <br> <br>Only think is ''how not to break it' wit the wind or gerater rain or sth :)
The chemicals used in a swimming pool does some pretty bad stuff to copper.

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Bio: You may recognize Dan and Denise Rojas from their appearances in various made for tv movies and national commercials. As the hosts of Green Power ... More »
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