Xref: utzoo sci.energy:3751 sci.electronics:16762
Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!clyde.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!chalmers.se!cs.chalmers.se!johnsson
From: johnsson@cs.chalmers.se (Thomas Johnsson)
Newsgroups: sci.energy,sci.electronics
Subject: Re: solar cells
Message-ID: <4350@undis.cs.chalmers.se>
Date: 7 Jan 91 09:44:39 GMT
References: <1991Jan3.072059.20842@loop.uucp> <11515@pt.cs.cmu.edu> <1991Jan4.173128.26484@cs.rochester.edu> <1991Jan5.011526.15425@midway.uchicago.edu> <1991Jan5.025526.9284@cs.rochester.edu>
Sender: news@cs.chalmers.se
Organization: Dept. of CS, Chalmers, Sweden
Lines: 21

In article <1991Jan5.025526.9284@cs.rochester.edu> dietz@cs.rochester.edu (Paul Dietz) writes:
>[...]
>The ability to use diffuse sunlight is an advantage, but high
>concentration is also nice -- silicon solar cells (at least) become
>more efficient at high concentration ratios (at constant temperature).
>I'm not sure why this is.  Also, concentration schemes should have
>a higher overall efficiency than flat plate schemes, since one can
>use more sophisticated cells that would be absurdly expensive
>with unconcentrated light.  This would become important in the
>long run if the area covered by collectors becomes significant.

How much more efficient?  How much concentration, i.e., what power
densities can solar collectors stand?  Presumably, such cells also
degrade more quickly?




Thomas Johnsson  (johnsson@cs.chalmers.se)
Dept. of CS, Chalmers University of Technology, S-412 96 Goteborg, Sweden
phone: dept: +46 (0)31 721088.