PHOTOVOLTAIC CONCENTRATOR WITH AUXILIARY CELLS COLLECTING DIFFUSE RADIATION
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United States of America Patent
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app pub date -
Nov 20, 2009
filing date -
Nov 21, 2008
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Abandoned
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Abstract
High-concentration photovoltaic concentrators can utilize much more expensive high-efficiency cells because they need so much less of them, but much of the solar resource is left ungathered thereby. The main cell is at the focal spot of the concentrator. Low-cost secondary solar cells are now added to the concentrator, surrounding the main cell. Diffuse skylight and misdirected normal rays irradiate these secondary cells, adding to output. Also, the power plant can have output on cloudy days, unlike conventional concentrators. As cell costs fall relative to other costs, this system becomes economically superior to both flat-plate and concentrator systems.
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