Joined: June 2007
|Quote (stevestory @ Jan. 26 2009,03:56)|
|Does the efficiency of a photovoltaic cell stay the same at higher intensities? Say I've got a 1m^2 PV cell at 20% efficiency. In direct sunlight we're talking 1.2 kW * 0.2==0.24kW. If I hook up an array of mirrors and increase the intensity on the cell by a factor of ten, does the 20% efficiency still hold? Will I get 2.4kW?|
I'm not sure what the math is, but you will, up to the point where you fry the cells.
Most solar concentrator designs seem to be parabolic mirrors aimed at a solar cell. As you can imagine, it can get rather warm. As in the link above, IBM has been working on cooling technology with a reflector that produces enough heat to melt steel.
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