[ExI] solar is looking better all the time: was RE: Efficiency of wind power
emlynoregan at gmail.com
Tue Apr 19 02:03:28 UTC 2011
On 19 April 2011 00:50, Eugen Leitl <eugen at leitl.org> wrote:
> On Tue, Apr 19, 2011 at 12:03:13AM +0930, Emlyn wrote:
>> The grid is a centralising, industrial age technology, solar isn't.
> Which is why the grid has so much pain dealing with it.
> Can't be helped.
Well, yeah. Inverters, mentioned earlier, are only necessary if you're
going to use AC. Inside a dwelling or business, if you convert to DC
throughout (9V?), solar becomes a lot simpler. Appliances/electronics
get much easier (just chuck the power pack and plug it straight in,
they'll disappear eventually). Washing machines and such are tougher,
So then it (solar) looks like a technology which will make the most
sense on buildings to power themselves, to begin with, with industrial
scale stuff on the old system for a while. The grid then needs to turn
inside out; rather than a system for broadcasting mass power from
central places, and have conversion losses at the point of
consumption, you need a system for sharing locally produced power,
with conversion losses in the grid here and there where you want to
bump the power up to a distance transmittable form; eg: a DC local
network, with suburban subs providing inverters to jump it up to high
voltage AC for shipping elsewhere, where appropriate.
I guess what'll happen is we'll have both grids for a while - the high
voltage "broadcast" one and an emerging inside-out local power DC
network, which can be a lot more ad hoc because it's just about
shipping around surplus where it exists.
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