Low cost solar energy extraction

  • US 20040020528A1
  • Filed: 03/22/2003
  • Published: 02/05/2004
  • Est. Priority Date: 04/01/2002
  • Status: Active Grant
First Claim
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1. A device called a solar collector to capture solar energy as heat and deliver hot air and comprised of:

  • a screen to block turbulence or wind from reaching the collector surface while allowing air and radiation to do so;

    a collector surface that absorbs the solar radiation, and is separated from the screen by a gap;

    holes in the collector surface through which the air heated by conduction from the collector surface may be drawn into the solar collector;

    a spectrally selective coating on either the screen or the collector surface, or both, that reflects longer wave radiation, and that either absorbs shorter wave radiation in the case of the collector surface coating, or transmits shorter wave radiation in the case of a coating on the screen;

    and an insulated enclosure under or behind the collector surface from which hot air may be drawn.

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