_hypx

33 ms·

391.
by _hypx 3y ago
> The result of the study, shown in Chart 3, reveals that most of Belgium’s neighboring countries faced dunkelflaute at the same time as Belgium. https://vito.be/en/news/dunkelflaute-what-do-when-there-no-w...
392.
by _hypx 3y ago
You don’t consume any of the hydrogen to liquefy hydrogen. That comes from an external energy source. Smartly, it would just be the renewable energy used to make the hydrogen in the first place, making it potentially nearly free. BEVs will
393.
by _hypx 3y ago
I've already address this point: > But of course, given the enormous anti-hydrogen campaign of the last decade, everything is currently at an immature level. You cannot go from zero to 100% instantly. There needs to be a period of s
394.
by _hypx 3y ago
And how did they fail so badly as to get a li-ion battery pack with worse energy density than lead-acid batteries? I'm sorry, but that is simply far too ridiculous to be taken seriously. It's blatantly some made-up number that no
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by _hypx 3y ago
> A liquid hydrogen tanker can carry nearly the same amount of energy as a liquid diesel tanker, noted Mike Roeth, NACFE executive director https://www.trucknews.com/sustainability/nacfe-takes-fresh-l...
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by _hypx 3y ago
That would be synfuels, aka e-fuels or SAF. The problem is that you need to make it in a carbon-neutral way. While this is not impossible, it is currently hard and quite expensive.
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by _hypx 3y ago
> Damn straight I am: https://www.energy.gov/eere/vehicles/articles/fotw-1234-apri... Seriously, that claim is just bullshit. 55 Wh/L is worse than a lead-acid battery. That graph is straight-up lying
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by _hypx 3y ago
Not all fuel cells use platinum, and those that do use very small amounts of it: https://www.cnet.com/roadshow/news/bosch-ev-fuel-cells-less-... > The major auto supplier, which recently partnered with Sweden&#
399.
by _hypx 3y ago
That is what is happening now. Critics of this idea are just repeating the same arguments that where used against PV too.
400.
by _hypx 3y ago
The main advantage is that it is a fuel that doesn't release CO₂ when burned. That solves the major weakness of pretty much all competing fuels. For the huge number of use-cases that need a chemical fuel to work, this alone is a game-c
401.
by _hypx 3y ago
Nevermind I read that wrong. In reality, dunkelflaute last significantly longer than 24 hours: https://www.hydro.org/powerhouse/article/tackling-the-dunkel... > The chart shows that as many as 3.7% hours, which
402.
by _hypx 3y ago
Thanks. You should reply to ben_w on this topic. That person is oblivious to the challenges of his HVDC dreams.
403.
by _hypx 3y ago
Like I said elsewhere, what you’re proposing is geopolitically impossible. And the type of overprovisioning need to even come close to solving means you are wasting the vast majority of your power. Ironically, this gives you basically free
404.
by _hypx 3y ago
> Most of these events occur from October to February; typically 50 to 150 hours per year, a single event usually lasts up to 24 hours. You can't even quote honestly...
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by _hypx 3y ago
Most of the world has not had any geographic surveying of them. It's likely that there are everywhere. Look only at the US or Europe for proper maps. There is an alternative to this: It's called nuclear power. But of course, renew
406.
by _hypx 3y ago
Ships will be powered by either hydrogen or something derived from it, like methanol or e-fuels. We are not likely to see civilian nuclear ships.
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by _hypx 3y ago
Just need the ability to have one part of the world be able to power the rest of it at any given time... I've had similar conversations before this website. I know what I'm talking about here. What you're suggesting is the sa
408.
by _hypx 3y ago
Which still doesn't solve the issue of intermittency at all. https://www.energyandcapital.com/articles/the-curse-of-the-d...
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by _hypx 3y ago
These people are simply lying. https://www.energyandcapital.com/articles/the-curse-of-the-d... Real experiences have show you cannot do it. You will have periods of major blackouts.
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by _hypx 3y ago
First of all, that is unlikely to ever happen. It is likely geopolitically impossible. But also it is very fragile as you still do not have any real backup power generation. Ultimately, it will make more sense to build system of hydrogen di
411.
by _hypx 3y ago
When you only build them every few decades, you tend to consistently find yourself with managers who have no experience in the field.
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by _hypx 3y ago
This ignores the part where no amount of batteries can actually solve the peak and valleys of renewable energy. Even partially solving this requires a truly ridiculous quantity of batteries, and likely equally absurd amounts of raw material
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by _hypx 3y ago
If we were serious about doing it with renewables, we'd skip the batteries and build as much green hydrogen capacity as possible, plus hydrogen pipelines to move it around. People who bring up batteries have failed to realize that wint
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by _hypx 3y ago
It comes from 20% capacity factor versus 90% capacity factor. Replacing 500 GW of nuclear will vaguely require 2,000 GW of solar. The problem is you want to build it in the southwest of the US, and has a long ways to go to reach the rest of
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by _hypx 3y ago
If you take into account load factor, you will need closer to 2,000 such solar plants. And you need far more land too. Also, you’ll end up being most of them in deserts, far away from any human habitations. So you will then build a vast net
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by _hypx 3y ago
It's because we only build them one at a time, and after 40 years of hiatus. At which point nearly all of the expertise for building them has retired. The problem is that environmentalists are fundamentally unserious about climate chan
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by _hypx 3y ago
Except SV companies are not valued like those other companies. You are paying a premium to buy stock in a mismanaged mess in a lot of cases.
418.
by _hypx 3y ago
Then here is a quick rebuttal to that: 1) Hydrogen storage is a solved problem. We have no issue storing it in pressurized tanks, or cryo tanks if necessary. We already have cars that work on both ideas, especially cars that you can buy a
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by _hypx 3y ago
Yes: https://energnet.eu/wp-content/uploads/2021/02/3-Hevin-Under... And no, they are not the same as oil reserves. And it is the only technology that can realistically scale to PWh. Which is why it is t
420.
by _hypx 3y ago
Just so you're aware, you never gave a link to your source. I am just going off your quotes. And YOY means year-over-year, so if it's 50% over last year, then it's 50% YOY. You can interpretate that as exponential growth unle

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