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squaresinger

@ squaresinger @lemmy.world

Posts
4
Comments
1425
Joined
1 yr. ago

  • Switzerland dug a hole the size of two soccer fields to install the world’s most powerful underground battery, able to output 1.2 GW within milliseconds.

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  • The headline looks wrong, but it actually isn't.

    The article specifies:

    • Total capacity: 2.1GWh
    • Peak output: 1.2GW
    • Ramp up time: a few milliseconds

    That's what the "within milliseconds" in the title refers to.

    Every power generator has a ramp up time. Think the time it takes to start the engine in a diesel generator, until it spins up and is able to output peak power.

    Nuclear reactors can hare ramp-up times of hours, in some conditions even days.

    This thing here can go from zero to peak output within almost no time, which makes it perfect to balance the sometimes erratic and unpredictable generation fluctuations of renewable energy production.

    For comparison, coal or gas power generators usually have large flywheels that, once spinning, react almost instantly to power fluctuations in the network by converting their motion to electricity or the other way round. If these coal or gas generators aren't running, they can't be used to balance the fluctuations in the network, so battery solutions like the one in OP are required to actively manage the network stability.

  • Switzerland dug a hole the size of two soccer fields to install the world’s most powerful underground battery, able to output 1.2 GW within milliseconds.

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  • Actually, the headline isn't wrong, you just read it wrong.

    The article specifies:

    • 2.1 GWh total storage capacity
    • 1.2 GW peak output
    • can ramp up to that peak output within milliseconds

    Every power source has a ramp up time. Ramping up e.g. a nuclear reactor can take hours, so if demand fluctuates it takes long for it to spin up.

    This one here can ramp up almost instantly to cover for fluctuations in the network, especially those caused by the unpredictable nature of renewable power generators.

  • Switzerland dug a hole the size of two soccer fields to install the world’s most powerful underground battery, able to output 1.2 GW within milliseconds.

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  • 1.2GWh within milliseconds would be exploding.

    Read the headline again, it only talks about GW not GWh. That means it can output 1.2GWh per hour, but it can ramp up to 1.2GW within milliseconds. And it likely can only keep that output for a very short time, which is exactly what you need to balance the fluctuations of renewable energy production.

  • Switzerland dug a hole the size of two soccer fields to install the world’s most powerful underground battery, able to output 1.2 GW within milliseconds.

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  • The headline is most likely a misunderstanding, but "Output X Watt in Y time" isn't all that wrong, since it would be talking about how quickly the power supply can respond to demand.

    Every power supply has a ramp-up time, and the way the headline is worded hints to a very short ramp-up time, which would be very helpful for network stabilization.

    But yeah, it's likely the headline writer just misunderstood something.

  • Why don't people with resin printers use acetone/nail polish remover more often for cleaning their prints?

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  • You can absorb it via the skin too.

  • Removed

    Gabe Newell on Steam monopoly accusations: Gamers have 'enormous choice' about where to buy games

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  • Try Heroic Launcher. It's really good.

  • Removed

    CEOs blame AI for layoffs, but an MIT professor says it fits a long-running pattern to find a cover story. ‘They’ve been saying that for 20 years’

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  • I do the opposite. Managers only understand money. So I show them how expensive AI is.

  • What 3D printer should I buy?

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  • I could have been more explicit. I was talking about commercial FOSH. While there are some companies selling Voron kits, afaik they are all taking the role of the "copycats" and aren't first-party. AFAIK, Voron is developed completely non-commercially.

  • Life finds a way

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  • Yeah, that's a terrible decision in the docs. Don't ever add a path where anything on the shell can execute user-modifyable code as root.

    As soon as you do that, you lose any protection that comes from separating root users and non-root users. Because now any malicious program can just use docker to elevate its code to root.

  • What 3D printer should I buy?

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  • I don't think so. Or to put it differently: there is no fully open-source 3D printer any more.

    The only relevant parts of the Snapmaker U1 that actually seem to be proprietary are the hotends/extruders. These are also proprietary for newer Prusa or E3D stuff.

    And compared to some of the newer Prusa printers, you don't have to physically snap off part of the mainboard to flash custom firmware onto the U1. Snapmaker doesn't even void your warranty for using custom firmware, as long as the firmware doesn't damage the hardware and you manage to back-flash stock firmware.

    I mean, any company can turn from FOSH to proprietary, same as E3D and Prusa, even though both of them were real FOSH champions. The issue is that if you do FOSH, you are essentially developing for your competitors.

    E3D spent years of development to come up with great nozzles, Hotends and so on, and they have to factor that into their product prices. So when it comes to the customers buying parts, they have the choice between an €70 one from E3D or an €6 one from Aliexpress. Or anything in between, often quality products from name-brand seller for a fraction of the price of a real E3D one.

    In the end, E3D ends up unable to compete in the market they created. That's unsustainable.

    In general, open source works well for stuff that isn't the main product. Angular works well as open source because Google doesn't have a way to sell it. Google monetizes their web apps built with Angular, so they have an incentive to maintain and improve Angular, but they can't monetize it directly, so open sourcing it helps get more eyes on the code, so that others can find bugs and vulnerabilities from them.

    Open source works good as a marketing device for non-essential parts. People do buy e.g. open printers because that means they won't get vendor lock-in and people can create custom firmware to fix issues, add improvements and support the product after the company stopped first-party support.

    But it's sadly unsustainable if you are just handing the plans to the competition, asking them to please undercut and replace you.

    And yes, as a FOSH and FOSS developer myself, this hurts. But so far there hasn't been an actual solution for the issue.

  • What 3D printer should I buy?

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  • What 3D printer should I buy?

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  • I can second the Snapmaker U1. Amazing machine, rock solid, works every time. I run it in LAN mode with custom firmware. If I need to remote in, I use a VPN on my local pi. No direct internet access/cloud stuff needed for the U1.

  • What 3D printer should I buy?

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  • It's seriously difficult right now. A while ago I would have clearly recommended Bambu, especially the A1/A1 mini. Super cheap, perfect prints every time. But their current behaviour makes them unrecommendable.

    If you are going for a higher budget printer, I can recommend the Snapmaker U1. That's a beautiful device. I got myself that one, and it's purely amazing. Custom firmware is available, which fixes some problems in the stock firmware. Perfect 4-color prints every time with very low waste.

    The filament changer is even quite useful for single-filament prints, because you can just keep multiple filaments loaded and don't have to manually swap filaments.

  • The coming coordination calamity

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  • Yeah, it does, thanks!

  • On the Moon

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  • Oh, this guy again...

  • Multi-color FDM recommendations

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  • I can second the U1. I got it after my modded Ender 5 that I fitted with a two-head toolchanger.

    It's night and day. The U1 isn't quite as fast in real life as the marketing material says, but it's still much faster than the Ender 5. It prints perfectly every time. Since I had it I had a single print failure, and that was because I didn't clean the bed propperly and the print detatched from the fingerprinty bed. Other than that, every single print worked flawlessly.

    The toolchanger also saves so much waste compared to a filament changer.

    I know it's beyond your stated budget, but I wouldn't want anything else (except maybe a Prusa XL, but that thing is ridiculously expensive).

    Btw, the U1 is rather open sourcy, and there's a custom firmware that improves a lot of issues with the OG firmware.

  • Please Choose a Password You Will Not Have Used in the Future

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  • I'd rather guess that it's the wrong error message. Like e.g. there's a communication error with a downstream service and they just catch Exception broadly and convert it to this error message. That would also explain why the non-filled value defaults to 0.

    We had something similar where there was a check that checks whether the password is the same as the user name, but then it showed the "Password is too short" message to the user instead because of an overly broad try-catch.

  • What is the best (liquid) glue for gluing PLA prints together?

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  • I know this isn't strictly an answer to your question, but maybe something to consider:

    I have a hot-air soldering station with different nozzle sizes, one of which is very small. It can be precisely controlled up to 480°C, and it's awesome to weld PLA or PETG together. I stopped using glue alltogether.

  • 99% of CEOs Expect AI-Driven Layoffs in the Next Two Years

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  • I can think of someone very much not in their right mind who did...