Post by SteveWPost by The Natural PhilosopherPost by SteveWPost by TimWPost by alan_mI note with our fantastic network of 1000s of wind generators wind is
only producing 0.6% of the electricity demand as I write this.
Did you expect them to work when the wind isn't blowing?
That's why we need a whole array of generating sources, enhanced storage
and rationalised consumption to meet net zero. It isn't complicated.
TW
It’s very complicated.
Estimates of the UK energy demand when we are all electric, suggest
we need
3x as much generation as we need now, say 150GW.
Putting in enough wind to generate 150GW is laughable.
Solar could never produce that much.
Biomass is the second most polluting generation there is.
Tidal is a joke.
Running cables to Morocco is hardly energy-secure.
Hydrogen is for toy balloons.
We’ll need a massive grid, not just a balancing one.
December gave us a greater than two-week Dunkelflaute; battery
backup would
need to supply 4TWh to cover that. The world’s largest battery
storage, at
$half-a-billion, could supply 1/1000th of it.
FHS, do some sums.
‘Rationalised consumption’ is pure Marxism.
AKA "Pure EcoBollox™"
It only fools People Who Cant Do Sums
We don't need diversity - we need around 150 nuclear power stations.
Have you misplaced a zero? Around 15 or 16 Sizewell Cs I think. Plus
a few for redundancy, when maintenance is required.
Nope. I was
(a) thinking of smaller reactors than the giant EDF EPWR fuckups
Fair enough, that's why I included SMRs in the question.
Post by The Natural Philosopher(b) working on the basis that we want *everything* to be electric, not
just what currently is.
Remember electricity only accounts for about 30% of our energy usage.
We probably need about 200GWEe to run the country and do chemical and
metal smelting, concrete making and the like.
While we will need a lot more electricity, chunks of it (Heating stored
hot water, charging EVs and home batteries, some industrial processes,
maybe heating heat stores for later home heating), will likely be done
at what are currently times of low demand. We may need 3x as much
electricity per year, but the increase in peak demand (and therefore
generating capacity) will likely be far lower.
If you have a big smelter you will want it to operate 24x7. Banks dont
offer lower interests rates on capital which is only used at night :-)
But you have a slight point: using nuclear electricity to make offpeak
hydrogen to use as a reducing agent in a 24x7 smelter is possible. As is
massive heat banks built into new build houses...
And a selection of liquid salt cooled reactors whose liquid salt is
itself a huge heat bank in its own right.
It all gets much easier if you don't want to store electricity, just heat.
HOWEVER be aware that the UK's total energy consumption is a lot higher
than just its electricity consumption. Transport takes a lot as does
commercial. We have of course outsourced manufacturing to India and
China, so we don't use any there at all, although we probably should.
We are currently running at 125 million tonnes of oil equivalent (mtoe)
annually.
(
https://assets.publishing.service.gov.uk/media/66f13235f188a93404379f94/Energy_Consumption_in_the_UK_2024.pdf
)
Now leaving aside the matter of apples and oranges and the efficiency of
fuel burning engines versus the efficiency of electrical machines, that
is 1453750 MWh. and averaged crudely over a year (8766 hours) that means
the average consumption of the UK is 165GW.
Which is ~ 4 times higher than existing grid supplies.
And we would need a bit of headroom for winter.
So a zero carbon britain with no useless renewables needs maybe 200GW of
nuclear, which is about 400 RR SMRs.Which I reckon would be arranged in
reasonably large groups to make 150 power stations. Or 50 MASSIVE
Fukushima sized 5GW power stations.
Obviously that is only a crude wet finger estimate, and we can argue
over details all day, but my gut feeling is that we will in time go for
SMRs simply because they can be mass produced and will be cheaper,
especially if built far closer to where the power is needed than today's
nuclear power stations.
And we will need about 150 sites. Some may be big ones. There is a good
argument for powering London from a couple of 5GW power stations
somewhere down the Estuary..
But not e.g, Northampton. There a couple of SMRs are far more appropriate
--
WOKE is an acronym... Without Originality, Knowledge or Education.