alt.energy.renewable

ha scritto nel messaggio
news:d3e74d98-f9fc-49fe-8874-1153a8ad5cb8@p73g2000hsd.googlegroups.com...
On Feb 29, 2:38 am, "Alex Chiani" wrote:
> Maybe, but I don't see any comparison between an only electricity
> production
> energy source like nuclear and other heating saving technologies like
> cogeneration or insulation (or thermal solar for hot water), etc.., except
> maybe the use of electric heat pumps, not really widespread nowadays in
> the
> world.... yes, maybe in a well insulated house you can save some energy
> for
> cooling in the hot months, which means also electricity savings

>The problem is that while plans to make everything more efficient are
good, in fact, not everything is made more efficient. As every new
>person is born, population increases, economies expand, there is going
to be growth that no amount of efficiency can reverse, only
>rationalize and slow down.


On the other hand, we can't think we can do all only with nuclear, there are
also a lot of energy saving technologies to implement, like insulation,
cogeneration passive and thermal solar, even if they don' t save directly
electricity production and use

>So we still need electricity and ultimamtely MORE than we have being
generated now. So we might as well use nuclear as it is the best way
>to go as the very first entry on this thread pointed out. By using
nuclear we shut down fossil, which is our goal. No amount of
>efficiency has ever shut down a fossil plant. In fact, not even wind
farms and solar cells have ever shutdown a fossil plant. We need
nuclear and a lot of it. It should be used in rational and efficienent
>ways, of course.


Not directly, but they decrease its electricity production

>Solar thermal in England...how's that working out in February? Most of
the time it has to be supplemented with electric water heaters. In
>high-density areas like London, it's very impractical. Not against it,
but it's hardly realistic for someone in an appartment building.
And...with enough nuclear we don't have to worry about foggy and
>cloudy London days...we should never have to worry about the weather.


Even in February in countries like Ireland and UK there is still at least a
solar irradiation of about 1 thermal kWh per m^2 per day, enough to heat up
water for a 200 liters per day of hot water need with a 10 m^2 solar thermal
plant. Of course, again, it's not an alternative of nuclear or other energy
source for electricity production plants