Comments on: Heating using Solar & Wind Energy + Insulation? http://www.residentialpower.net/residentialwindpower/heating-using-solar-wind-energy-insulation-354 Sustainable power for your home Mon, 21 Nov 2011 06:48:50 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: John D http://www.residentialpower.net/residentialwindpower/heating-using-solar-wind-energy-insulation-354/comment-page-1#comment-1517 John D Fri, 13 Feb 2009 23:04:48 +0000 http://www.residentialpower.net/residentialwindpower/heating-using-solar-wind-energy-insulation-354#comment-1517 The simplest idea is to paint a cardboard box flat black and place the water in a heat-proof container (a metal pot) inside the box. A more complicated idea is to bend a sheet of cardboard into a parabola. Coat the surface with a piece of shiny metal (such as aluminum foil). Aim it at the sun and at the line of focus you'll have a couple of hundred degrees F. A long, skinny trough of water placed along the focus line will be the hottest in your class. The simplest idea is to paint a cardboard box flat black and place the water in a heat-proof container (a metal pot) inside the box.

A more complicated idea is to bend a sheet of cardboard into a parabola. Coat the surface with a piece of shiny metal (such as aluminum foil). Aim it at the sun and at the line of focus you’ll have a couple of hundred degrees F. A long, skinny trough of water placed along the focus line will be the hottest in your class.

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