Many "Eastern block cities had district heating systems (ie for homes)
run from rejected heat from the llocal power station. Very succesful.
However in Summer no-one needs it, so the same means of dumping heat
are needed as if the distrct heating weren't there. Grossly uneconomic
and definately financially unviable.
These systems now pose a massive problem as they run for miles and mile
and are insulated with asbestos :-( It's going to cost a fortune to
de-commission them and repairs are a nightmare and extremely hazardous
for the workers

Lots of rejected and "waste" heat is low grade/temperature. Thinking
of uses for it is very difficult.



Joe Fischer wrote:
> On 8 Sep 2006 09:44:08 -0700, "Mad Scientist Jr"
> > wrote:
>
> >Who are some Ethanol or E85 producers (or farms / suppliers / etc along
> >the chain) that use Ethanol instead of fossil fuels, to produce their
> >products?
>
> Perhaps none use only ethanol at this time. but they
> may use the stalks, shucks, or other by products to supply
> heat to the stills.
>
> But there is a better way, any waste heat at about 100C
> can be used for the heat for the still, and many Trillions of
> BTU of waste heat has just been wasted when it could have
> been use to run a still, or to distill bad water or salt water
> for drinking water, see the date on;
>
> http://stinet.dtic.mil/oai/oai?&verb...er =AD0406634
>
> I have proposed that power plant waste heat be used,
> but hopefully has already considered it and is using it.
>
> Joe Fischer