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The Natural Philosopher[_2_] The Natural Philosopher[_2_] is offline
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Default Hydrogen engines

On 19/01/2020 20:13, Pancho wrote:
On 19/01/2020 14:50, The Natural Philosopher wrote:
On 19/01/2020 13:37, Chris Hogg wrote:
On Sun, 19 Jan 2020 13:17:14 +0000, Pancho
wrote:

On 19/01/2020 12:53, Chris Hogg wrote:

Lots of 'potential' storage solutions, such as compressed air into
underground caverns, trundling very heavy weights on rail tracks up
mountains, Tesla-type batteries everywhere and so on. But none of it
comes near to pumped storage in terms of capacity, and that's very
dependent on the right topography, most of which has already been
used. Those other solutions may be OK for very short term
peak-lopping, but none are capable of storing the amounts of energy
needed to run the country for a several days at this time of year,

OK, I was seeing quotes of hydrogen storage providingĀ* months energy
supply as opposed to a few hours for pumped storage. The main
difference
being hydrogen is 40% efficient where as pumped is 80% efficient.


But how and where are they going to store a month's worth of hydrogen?
The volume would be absolutely huge, even if compressed. The phrase
'greens don't do sums' is occasionally trotted out on this NG. That
looks like a classic example of just that.

To power the UK for a day, just on electricity, in winter, takes about
24 hours at an average of 35Gw

= 840GWh

In terms of nuclear warheads, that is 722 kilotons. 50 Hiroshimas.


Would you rather live:

(a) near a nuclear power station that cannot explode, only melt down
inside a safe containment vessel?
(b) near a megaton explosion capable hydrogen store?

Note: a megaton explosion takes outĀ* about 100 sq km absolutely.

Remind me, how many gas wells have exploded with megaton explosions.


Wells only a few. Storage facilities for gas...one or two with
devastating results


https://en.wikipedia.org/wiki/Gas_explosion

Note that nearly all of these killed more people than chernobyl and ALL
of them killed more people than Fukushimas recator did.


How exactly would these explosions occur? AIUI hydrogen's dispersal rate
in air is very fast. It is quite hard to get an explosive mix.

Don't be silly

It there is a fire and it breaches the walls of the containment, forget
chernobyl, its goodnight Vienna.


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