_hypx

19 ms·

211.
The internet has become soulless and I hate it(tim.kicker.dev)
29 points by _hypx 3y ago|21 comments
212.
Device hits 20% solar-to-hydrogen conversion efficiency(futurity.org)
11 points by _hypx 3y ago|0 comments
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by _hypx 3y ago
It depends on whether direct air capture of CO₂ can be cost effective. If so, then it can happen. E-fuels will just be renewable energy plus water and air. That is likely to be pretty cheap. If DAC isn't doable, then it probably can&#x
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by _hypx 3y ago
Since when did we trust the government to give a correct answer on a complex technical subject? The person is just repeating what he was told. There's no evidence anything of significance being recycled. All of this is projections of f
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by _hypx 3y ago
So it’s impossible at small scale, but suddenly it’s doable as large scale? A risky bet. Also, the battery chemistries and pack structure are wildly different between different cars. One of the reasons why lead-acid batteries are recycled i
216.
by _hypx 3y ago
EVs are still a tiny niche. The resource requirements will mean it will be a long time before than can grow beyond that. Note that BEVs were selling in the thousands only about a decade ago. FCEVs could easily reach the level of sales of BE
217.
by _hypx 3y ago
That’s the claim, but no such process has been implemented yet. At best we’re in the early stages. One thing to be aware is just how much BS there is around this topic. It is classic greenwashing and it is similar to the plastic recycling s
218.
by _hypx 3y ago
He literally thinks I’m a new account, which is wrong. And FYI, the anti-hydrogen argument is a generic anti-green, anti—progress viewpoint. It is easily described as outright Ludditism. It’s pretty obvious the critics are totally wrong, an
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by _hypx 3y ago
> It's well known that hydrogen makes most (possibly all) metals become brittle over time. It's not "well known." In fact, this is bullshit. Only some metals have this problem. Even then there are ways of preventing t
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by _hypx 3y ago
It's a simple extrapolation of the cost reduction in wind and solar energy. If you have an issue with that, then you are basically denying that wind and solar energy have become very cheap.
221.
by _hypx 3y ago
If you cared about actual efficiency, you'd be skeptical of BEVs today. There's no straightforward of powering them directly with renewable energy. You will need vast amounts of energy storage to make that work. That will not be a
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by _hypx 3y ago
You cannot get every kWh from renewable energy into a BEV no matter what. The intermittency problem guarantees that a lot of it will be lost or never captured. An idea like hydrogen that lets you store energy for long periods lets you utili
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by _hypx 3y ago
Electrolysis is theoretically up to 100% efficient. So are fuel cells. The whole process is an electrochemical system not much different than what batteries are. You're reading too much pro-BEV propaganda. They're just spreading F
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by _hypx 3y ago
That's widely inaccurate. The fundamental advantage of an electrochemical system is that you are no longer limited by Carnot's theorem in the same way as heat engines. As a result, the efficiency of both systems can be the same. N
225.
by _hypx 3y ago
Now do the math with 300 million EVs. Also, assuming SUV sized ones being popular too, alongside many commercial vehicles too. It is not that simple. Especially since so much of it will be DC fast charging and not slow speed charging. Compr
226.
by _hypx 3y ago
ICEs can be fixed. It's pretty rare to have a truly dead ICE. For non-luxury cars, even a replacement is no big deal. Zero is a pretty low number. A lot of them will have to be replaced. Especially for commercial vehicles where they of
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by _hypx 3y ago
https://www.sciencedirect.com/science/article/pii/S258900422...
228.
by _hypx 3y ago
It's time to stop digging...
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by _hypx 3y ago
Because you can't always have electricity available at super chargers. How do you power your car if the wind is not blowing and it is not daytime? You will need energy storage, something hydrogen provides in spades. That ensures hydrog
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by _hypx 3y ago
That's complete nonsense. We will need vast amounts of grid upgrades to be able to be able to power all cars. And if the grid needs to be purely renewable, that problem explodes into something far harder. In fact, the problem becomes s
231.
by _hypx 3y ago
Biofuels aren't really a solution. The problem with electricity is that you can't easily store it. And the only way to do so at large scale will be converting it to molecules. That implies hydrogen. As a result, green electricity
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by _hypx 3y ago
My account is older than yours...
233.
by _hypx 3y ago
Car makers are just following the subsidies and the hype. It is not even a sustainable idea and it will eventually die. Hydrogen will eventually be nearly free. It is just going to be made from excess wind and solar energy and will follow t
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by _hypx 3y ago
It is much lighter than air. Any hydrogen leaks will float away a lot faster than gasoline.
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by _hypx 3y ago
It is cheaper than building out the grid needed to power all cars. In fact, you use basically the same land that gas stations current use up. It is quite straightforward. Attacks on efficiency are anti-hydrogen FUD arguments. They were made
236.
by _hypx 3y ago
You are repeating pure FUD. This is pretty much what BEV companies want people to believe so that they never consider any alternatives. In reality, fuel cell cars are literally just EVs, no different than BEVs. There are no fundamental down
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by _hypx 3y ago
And either be reversed or will have loopholes. And Norway is one (small) country that is not representative of the rest of the world. And I don't think the political situation in Europe is all that stable either. A lot of the movement
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by _hypx 3y ago
Not to mention radical increases from demanding everyone switch to heat pumps plus demanding industry switch to electrified versions of everything too. It's seriously a complete fantasy to think the grid can happen all that with minima
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by _hypx 3y ago
Then the future is ICE cars because it makes sense to "actual costumers." But that isn't the topic at hand. It is what will make sense, and that can only be hydrogen cars in the long run.
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by _hypx 3y ago
We can build hydrogen infrastructure if we had to. None of those ICE bans are going to happen by 2035, at least not without massive loopholes. We will be driving ICE cars for a very long time to come. The correct pathway is finding a sustai

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