🚀 go-pugleaf

On Sat, 9 Mar 2013 01:44:13, jg <jg@nospam.com> wrote:

> On 9/03/2013 8:59 AM, jimp@specsol.spam.sux.com wrote:
> > In sci.physics jg <jg@nospam.com> wrote:
> >> On 9/03/2013 7:17 AM, jimp@specsol.spam.sux.com wrote:
> >>> In sci.physics jg <jg@nospam.com> wrote:
> >
> > <snip>
> >
> >>>> Yes it's a problem, as all methods of generation have problems.
> >>>>
> >>>> But not a big enough problem that solar isn't still a very useful tool
> >>>> in producing electricity.
> >>>>
> >>>> Typically a house produces 1kWh for 6 hours, when no one is home it goes
> >>>> to the main user - industry, which operates mainly at those same hours.
> >>>
> >>> Peak electrical demand occurs in the late afternoon and doesn't go
> >>> away until well after sunset.
> >>>
> >>> The main users are households and lighting in general.
> >>>
> >>> Here is an example for California:
> >>>
> >>> http://www.caiso.com/SystemStatus.html
> >>>
> >>> This is typical no matter what the area.
> >>>
> >>>
> >>>
> >> The highest peak demand happens at night, for about 4 hours.
> >>
> >> The system has to provide 3/4 of that demand for about another 12 hours
> >> in daylight, then much less for the remaining 8 hours.
> >
> > That ratio is highly seasonly dependant.
> >
> 
> Oh, a minute ago it was typical no matter what area.
> 
> 
> > In the summer the evening/night demand goes way up with everyone turning
> > on the house A/C and stays up until close to midnight.
> >
> 
> And in cold places it goes way up in winter for central heating.
> So I should throw away my solar panels because they don't address peak 
> demand?
> 
> 
> >> Would if solar panels could cover all demand and better if it was at
> >> peak, but they do contribute for 6 hours if not at the highest demanding
> >> 4 hours of day.
> >
> > The problem is solar contributes nothing useful during the peak demand.
> >
> 
> That would be a problem at peak demand, for about 4 hours a day.
> Perhaps you can think of a way to address that, without burning more coal.
> 
> 
> > Now if solar were really extremely cheap compared to gas, then it might
> > be worth something to run it during the day and turn off the gas
> > generators, but solar is not cheaper than gas by a long shot.
> >
> 
> Cheap was never the prime motivation for renewable energy, but with the 
> price of fossil energy increasing the economics look better all the 
> time. Especially if you are an exporter or importer of fuel.
> 
> 
> >> Solar water heaters for instance do a better job of that.
> >
> > Water heating is a trivial electricity consumer.
> >
Throw away your PV panels and grow a tree!