Peter Scott wrote:
On 22/04/2011 19:57, Tim Watts wrote:
Huge wrote:
On 2011-04-22, wrote:
responding to
http://www.homeownershub.com/uk-diy/...la-701863-.htm
DA wrote:
Donwill wrote:
Interesting little snippet I came across:
http://www.theregister.co.uk/2011/01...r_shenanigans/
The truth will out :-)
Don
Which truth? That UK (and everyone else) lacks charging stations?
Even if there were charging stations every 50 yards, the technology is
insufficiently mature. Or, in more, er, aggressive terms, it sucks.
But to be fair to a new technology, steam vans and early IC cars sucked
rocks through very tiny straws when they were invented.
I expect there were plenty of people who said stuff like: "I don't
have to
get up 2 hours before I need to travel to heat up my horse" and "where
will
I get a load of coal or cleanish water on my way to the next distant big
town" (when there was a fine infrastructure of inns with stabling
facilities).
That not to say I'm putting my bets on battery powered cars
specifically -
there are other choices, but I do see electric cars coming to maturity at
some point, and the road to there can only be achieved by going
through the
evolutionary period first like most other things.
I used to think bio-diesel was a good idea until it appeared to be the
case
that it displaces too much food producing land.
I am a firm believer in nuclear power which tends to imply (mostly) that
electric cars are a good thing to be developing. As to whether battery
technology will get there (at least it is a well researched area
thanks to
the proliferation of portable electronics) or whether it will be hydrogen
fuel cells or even remain with IC engines but powered by alcohol from
algae
farms all remains to be seen. But someone has to be trying new stuff, and
like the first "personal computer" and "mobile phone", the prototypes
will
expensive and sucky.
Cheers
Tim
I heard what I thought was a bright idea the other day. The problem with
solar energy sources like wind and light is that they vary a lot and so
don't always produce when the energy is needed. PV leccy is produced
during the day but needed at night and so on, and many posters have
pointed out that we do not have means of storage at sensible cost. If
there were lots of electric cars with batteries that charged reasonably
quickly, they could act as a huge reservoir of electrical energy.
So, how often you do fill up the car BECAUSE its blowing a gale, or is
brilliantly sunny, and never ever fill it up between?
Its complete nonsense that car battery storage could possibly compensate
for renewable deficiencies.
And I reckon 1/3rd of the total worlds know lithium reserves would be
needed to cover a couple of cold dull still UK weeks in decemeber.
At the end of which, one could go shopping until the wind blew again.
Lots of scenarios present themselves. As an example I might have a home
PV array and a car. During the day the car charges when I'm not using
it. During the night, I can use some of the energy to power my home or,
if there is a surge in national demand, a modest amount of electricity
is bought from each car connected to the system, and then sold back if
needed later. Another example. I'm making more PV elec during the day
than I need. The system buys it and sells it to cars charging at work
for the trip home. The idea thrives on intelligence and variation of
generation and use. I can't see that it's beyond our technology now.
Clearly we'll continue to need a base of steady generation but to me an
idea like this looks promising.
Its actually ********. Everything that looks remotely like making
Renewable energy better look significantly more likely to mean we could
build 100% nuclear powers stations, and top up the cars on cheap rate at
night.
A far more reasonable proposition.
I agree with Tim about algae. The efficiencies they are already
achieving in trials, and the fact that food-growing land is not
required, makes this a very promising bio-fuel.
The overall efficiency of sunlight to fuel is still crap so its still
needs land area in country sized chunk, or sea area in country sized chunks.
The short answer to renewable energy is that here isn't enough free
energy in sunlight to actually satisfy anyone's needs, and if you try,
you end up with structures of country sizes, that totally modify the
environment more than CO2 does.
Peter Scott