1,482 karma · joined June 18, 2007
---
Fair point, same here (I was born in 1967), however fossil fuels are so effective and adequate as energy sources, as long as we ignored/neglected their dubious effect on the climate, that there was no real attempt to explore other ways.
> Storage and transport are incredibly expensive and technically difficult
For the "gridpower backup" application there is no transport needed, and storage doesn't have to be compact nor mobile (those are a major challenge for hydrogen in transportation).
> dreadful energy density
This is not a show-stopper for the "gridpower backup" application. For huge volumes or very long-term (not sure this will be necessary) it may be stored in salt caverns ( https://en.wikipedia.org/wiki/Hydrogen_storage#Underground_h... )
> potent green house gas effects > dangerous
Granted, however we are used to store huge volumes of dangerous materials, some gaseous at ambiant pressure/temp (methane...), even into salt caverns, albeit when we began to do so (in the 1950's) it was quite a challenge.
> Roundtrip efficiency (electricity to H to electricity) is abysmal
Various new ways to obtain H2 from electricity offer impressive yield in realistic conditions (check SOECs), and other advances are promising ( https://liten.cea.fr/cea-tech/liten/english/Pages/Strategic-... ).
> green methane makes a lot more sense
As does ammonia, in some contexts. There is no one-size-fits-all here!
> hydrogen > contributes less than a rounding error to global electricity generation
True, however it doesn't imply that it will remain irrelevant.
> unviable financially
For the time being, and less and less. Bloomberg NEF predicts that green hydrogen will cost approximately 1.2€/kg in 2050. Carbon taxes or oil prices may also play a role as nearly all hydrogen is now produced thanks to some fossil fuel.
> nuclear > is a genuinely low-carbon source of electricity
Green hydrogen could also be.
> prone to leakage
This is a major challenge for transportation-related usages, especially in small or not-intensively used vehicles. This isn't in the "gridpower backup" role, as mass and volume of storage isn't a major parameter.
No, turbo-alternators 'burning' hydrogen do exist. And green hydrogen (produced by renewables) is cheaper than pink hydrogen (produced by a nuclear reactor) because the total cost of renewables' electricity is lower than nuclear's.
The real long-term effect of past nuclear accidents is a subject of debate, and the potential worst case a concern for all.
> the only power generation that has a completely closed fuel life cycle
Not at industrial-scale.
> and believe in a technology we don’t have.
https://ourworldindata.org/grapher/electricity-fossil-renewa...
On the other side: https://www.reuters.com/sustainability/climate-energy/micros...
However its results are dwarfed by the results of its renewables projects: https://ourworldindata.org/grapher/electricity-fossil-renewa...
In France about 60% of final energy is produced thanks to fossil fuel.
Moreover the cost of this 'nuclearization' was huge (France debt is abyssal, and taxes are very high)
Details: https://sites.google.com/view/electricitedefrance/messmer-pl...
There even are efforts to recycle existing ones: https://www.offshorewind.biz/2023/02/08/newly-discovered-che...
In most advanced nations landfilling them is prohibited, and many are now burnt in cement kilns.
Yes, even in South Korea: https://en.wikipedia.org/wiki/South_Korean_nuclear_scandal
https://en.wikipedia.org/wiki/Fukushima_nuclear_accident_cle...
Why don't you set (per table) the autovacuum_analyze_scale_factor parameter (or autovacuum_analyze_threshold) then let AUTOVACUUM handle this?
Hypothesis: you have (or had) at least a cat at home, while your neighbors didn't, and a cat showing up on your front porch may think "better here because at least a cat can live here, even if it triggers a territorial conflict".
Efficiency is always at odds with robustness, and it may be the ultimate challenge.
Some Japanese firms may also have adopted ole' USDA approach as I remember reading during the 80's that some Japanese big motorbike brand team in charge of the design of a new model was composed of teams of engineers, each dedicated to a given aspect (even transversal ones, there even was a team dedicated to 'temperature').
The question is not "which amount of fossil fuel, which amount of nuclear?" but about renewables and nuclear.
>> Because those who refuse to be exposed to induced risks can prevent most of it
> ??? In cities the bulk of deaths are cyclists/pedestrians
Being ultra-alert, or avoiding crossing any street or even avoiding any area where motorized vehicles zoom around is possible. Avoiding most of the effects of a major nuclear accident or of some wandering "hot" nuclear waste (during the upcoming 100000 years or so...) is way, way more difficult.
> Coal power plants are literally generating more radioactive ematerial
This is not about preferring coal to nuclear but about preferring renewables to nuclear.
> The entire french nuclear waste
(I'm French. ) Our "solution", named "Cigéo" ( https://en.wikipedia.org/wiki/Cig%C3%A9o ), isn't even ready (more than 60 years after the first industrial reactor diverged) and is officially imperfect (there are risks, French ahead: section «Déchets» in https://sites.google.com/view/avenirdunucleraire/#h.e4d4cdh3... ).
Better avoiding producing such stuff, IMHO. Renewables...
BTW check the trend: https://ourworldindata.org/grapher/electricity-fossil-renewa...
This is highly debatable.
A glimpse: https://en.wikipedia.org/wiki/Chernobyl:_Consequences_of_the...
> Why do we accept car deaths
Because those who refuse to be exposed to induced risks can prevent most of it, while those who refuse to be exposed to nuclear's induced risks (for them and their children, and their children, and their children... thanks to nuclear waste) are out of practical and realistic options.
https://en.wikipedia.org/wiki/Battle_of_Fort_%C3%89ben-%C3%8...
https://en.wikipedia.org/wiki/Radioactive_contamination_from...
A. Merkel was pro-nuclear (she holds a PhD in quantum chemistry). During the 2000's she tried hard to slow down the phase-out process, and extended reactors' life in September 2010.