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bad_alloc

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bad_alloc ,

One alternative is hydrogen. Hydrogen fuel cell technology isn’t perfect, with a loss of about 20-30% IIRC

You don’t recall correctly: The efficiency of Hydrogen, from solar cell to the wheels is 26%. Electrolysis is highly inefficient and compression and chilling of hydrogen is very energy intensive. Meanwhile, EVs are at 70%.

You are right that batteries kinda suck due to their energy density. However with EVs you can buy today you can still commute every day without noticing any major difference to an ICE car. You can also do long road trips, even in a small car, albeit slower. (Source: did both)

bad_alloc ,

I looked it up, hydrogen fuel cells can attain about 60% efficiency from the energy potential in hydrogen, when converting to electricity. So I’m not wrong, we’re talking about different numbers.

If you are looking at the pure engine efficiency, we are now looking at >97% for most EV motors (class IE4). However, the point of the entire transition away from fossil fuels is preventing or delaying climate collapse. For this purpose lowering emissions and reducing energy use go hand in hand, hence the overall efficiency is critical.

But we can usually also do natural gas reclamation, which is the process of removing the carbon from CH4, and producing pure hydrogen, which, I believe is a much more energy efficient process.

Hydrogen is less strongly bound to Carbon than Oxygen, however in this process we produce more CO2 again.

AFAIK, no real progress has gone into electrolysis for decades.

There is a theoretical upper bound for the efficency of water electrolysis, depending on the temperature. While current electrolyzers can surely be improved, since we are already making electricity, we might as well use it directly. Some applications (aircraft, rockets, …) need the higher energy density of chemical fuels. But: Working with liquid or gaseous hydrogen is terrible: Cyrogenic liquids are not easy to handle, let alone store. Hydrogen will embrittle any metal exposed to it and when inadvertenly mixed with air forms a highly explosive gas. Even the rocket people try to avoid using hydrogen unless they really need the ISP.

The fact is that the batteries will cause the cars life to end long before anything else wears out that could potentially cause the car to get scrapped.

So far we have seen EV batteries not degrade a lot due to good BMS. For most cars the battery will last at least 10 years before performance is seriously impacted and even then the battery can be reused for storage (home or grid scale). Most EVs have >40kWh batteries, homes usually need 5-10kWh storage. So one chewed up EV battery could be reused for multiple stationary battery systems.

Cycle life is the core of the battery problem.

I do agree that current battery tech is… not great. Having less spicy cells that are easier to recycle or recondition would be a massive gain and more research needs to be a core focus. However Li-Ion and LiFePo are already good enough to work for most people most of the time. Pair this with a lot of wind and solar energy generation and you have mostly sustainable traffic. This can be done right now and it has to be done right now. I argue a lot against hydrogen because it seems like a technology that is not there yet and allows many old players in the energy market to delay a transition which is not beneficial to them.

bad_alloc ,

Xiran Jay Zhao is posting about this on their Instagram a lot, which gives an insight into this from the POV of a Chinese person.

bad_alloc ,

At which point do political ideologies get shaped by “advertiser friendliness”?

bad_alloc ,

Since bread cannot be attached to language in any orientable way, you are right: It ain’t a sandwich, it’s a salad!

bad_alloc ,

Welcome to topology where your mug is a toroid and the orientation matters a lot.

bad_alloc ,

Welcome to the real world Neo. Don’t take the pill with 777 permissions btw.

bad_alloc ,

Same here. Maybe post it on feddit.de/c/blogging under a different account? :)

bad_alloc ,

Change to Linux on main PC when?

bad_alloc ,

Yeah, this will not hold up in court and is likely just for political points.

bad_alloc ,

They are a lot more efficient in their class and might convince some ICE drivers to switch. Their range tends to be quite good. Unfortunately they have drawbacks:

  • They require a very large battery. If you don’t find >150kW chargers, you’ll be waiting a long time
  • More batteries per car = worse environmental impact from production
  • Road degradation grows by the fourth power w.r.t. vehicle weight. The big batteries make electric SUVs very heavy
  • SUVs are more dangerous for pedestrians due to their size
  • In a crash SUVs deliver much more energy, killing more people.
bad_alloc ,

I second this. Drove my Zoe through rain, snow and ice, never had any problem or even thought about with water ingress.

bad_alloc ,

Trade Offer:

You receive: Alligators, Meth

You Give: Debt, Mafia

bad_alloc ,

I don’t get it. People are working for free to add a feature to your product which might move more people to buy said product. Make users who use external features acknowledge some waiver that your company is not responsible for damage. If it turns out to be really good, you can fork it, hire the original inventor and turn it into a paid product. Isn’t that a risk-free win? Am I missing something?

bad_alloc ,

Star Trek: Picard, when the Borg wake up and the Romulans just vacuum them out. In that moment the Cube should have automatically teleported them back inside. If the teleporters were down for some reason, the remaining Drones would just happily continue working in hard vacuum and proceed to assimilate the shit out of the Romulans. What happened was an uncalled for nerf of the Borg.

bad_alloc ,

I’m sorry if my grammar betrays my words, I am not a native speaker.

Bro, you just outphrased the native speakers.

bad_alloc ,

Don’t forget that we recently had a pandemic with a virus that is known to cause permanent brain damage. This includes reduced motor function, mental capacity and personality changes.

bad_alloc ,

I thought so too, then I noticed people driving more aggressively.

bad_alloc ,

… uh, why?

bad_alloc ,

Remember people: Most alternative browsers are chormium under the hood! Not Firefox though :)

bad_alloc ,

Commie: Never thought I’d die fighting side by side with a Neo-Nazi.

Nazi: What about side by side with a temporary political ally to seize power?

Commie: Aye. I could do that.

bad_alloc ,

Along with search and many other things. Probably most of theur devs are optimizing user distraction and ad click rate, instead of… basic functionality 😐

bad_alloc ,

Removal of all benefits of civilization to… own the libs?

bad_alloc ,

I’m doing my part!

bad_alloc ,

Was zum Geschlechtsverkehr ist ein Fütter?

bad_alloc ,

We saw the mass adoption of the internet, which before was mostly used by a small group of techies. Now we might be heading to a split: The mass walled garden and a separate smaller but free internet.

bad_alloc ,

One thing I don’t get: How were people convinced that an entry in a blockchain somehow results in ownership. People understand ownership and its limits: They lock their bikes when they leave them somewhere, because if there is no enforcement you can lose property. The NFT scammers never mentioned enforcement once, yet somehow you “owned” some ape picture. How did that happen?

CHROME (google) is planing to implement DRM (kinda) into their browser (lemmy.dbzer0.com)

looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don’t run a complaint browser ( cough…firefox )...

bad_alloc ,

Will this fly with GDPR?

bad_alloc ,

There is a technical solution: Have cameras sign the raw data recorded from the sensor in situ, which allows you to check if a given video was recorded on a given device. You could even add another layer where the device uploads timestamps, frame hashes and location data to a blockchain (finally a usecase!) to pin it to a certain place and time. Sure, all of this can be circumvented with enough effort, but it will make it much harder. Especially if a video can be pinned to a place, you can verify if it matches that scenery.

bad_alloc ,

I think this system is flawed beyond repair.

Of course, but will that stop somebody from trying to push it? ;)

bad_alloc ,

I guess this is supposed to be taken as a bleak joke but it won’t be over soon. We all will likely experience a direct hit to our quality of life. If you’re poor, your survival will get harder. If you have or want children they will have fundamentally worse lives, compared to what we experienced so far. This can go on for decades or centuries, depending on how much we can stsill fix and what tipping points occur.

So yeah, hope that is some motivation to change something. Or at least shout at some people. :)

bad_alloc ,

I want to love my FP3 but it loves to crap out by being slow or just crash prone. I replaced my camera because it accumulated dust behind the lense, because it is replacable.

… still wouldn’t buy any other phone, it works well enough in all aspects and is a bit like the slightly crappy car you still love <3 Next one will be a FP5 :)

bad_alloc ,

I also enjoy shouting “Wololo” at other people’s computers, only to have them boot into Linux unexpectedly.

bad_alloc ,
  • Cannot convert baby carrot to Carrot
  • Index 7 is out of bounds for egg container
  • Boiling water suddenly turns totally black and opaque due to a bug in the bubble shader
bad_alloc ,

Some security researcher: “angle grinder attacks on common lock systems”

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