From: Mike Lorrey (mlorrey@datamann.com)
Date: Mon Dec 17 2001 - 10:43:23 MST
"Robert J. Bradbury" wrote:
>
> On Fri, 14 Dec 2001, Anders Sandberg wrote:
>
> > What would the efficiency of simple moon made photovoltaics be, and
> > what about the energy requirements for mass sorters and robots?
>
> Regular Si solar cells are certainly feasible in the 10-20% region
> (the lower efficiencies being poly-silicon which may be easier to
> produce on the Moon). You might be able to push it up to ~24%. But
> you have to use multi-layer cells made from different materials with
> higher and lower energy band gaps to get into the 30+% region.
>
> If you are using nano-mass sorters like the single proton massometer
> from Nanomedicine, I suspect the energy requirements are very low.
> If you are talking macro-tech they are probably quite a bit higher.
> In mass-spec sorting you have ionize the atoms to put a charge on
> them so you can accelerate them through a field that will sort them
> by mass.
Using simple reflectors to focus solar flux on fewer cells will not only
make it easier, but cell efficiency increases with flux levels.
This archive was generated by hypermail 2.1.5 : Sat Nov 02 2002 - 08:12:37 MST