Is the energy to produce the steam-driven turbines and other aspects
of the "main-stream" electricity production mechanism included in the
calculations here? At least there is some point in the lifetime of a
photovoltaic cell that nets electricity without an energy deficit.
Plus, it does so without releasing greenhouse gas.

Louis Kleiman


--- In Firebird-general@yahoogroups.com, Hannes Streicher
<hstreicher@...> wrote:

>
> Guten Tag Claudio Valderrama C.,
>
>
> >> -----Original Message-----
> >> From: Firebird-general@yahoogroups.com
> >> [mailto:Firebird-general@yahoogroups.com]On Behalf Of Leyne, Sean
> >> Sent: Miercoles, 11 de Julio de 2007 12:11
> >>
> >> > Subject: [Firebird-general] A car that could save the planet-

fast

> >>
> >> I don't think so!
> >>
> >> Not unless the electricity to charge the batteries is from

solar, wind,

> > ...
>
>
> > It seems the technlogy is already here:
> > http://siliconsolar.com/solar-panels.php
> > http://siliconsolar.com/solar-battery-chargers.php
>
> photovoltaic solar cells require so much energy during their
> production that they take between 50% to 80% of their usable live

to produce

> this energy again ,
> add to this the amount of energy needed for the production of the

controllers and

> batteries to store the electricity then the whole system comes out
> with a negative energy balancesheet
> (this is based on average central european sunshine duration and
> intensity )
>
>
> photovoltaic systems are only usefull where there is no other power
> source , or when you save on laying long wiring
>
> solar power is at the moment best used in producing warm water
> or
> for electric power on a large scale heating water (or other
> liquids) to drive regular steam turbines
>
> this is off topic for this list , so any comments are welcome but
> please off the list
>
>
> --
> Mit freundlichen Grüssen / with best regards
> Hannes Streicher mailto:HStreicher@...
>