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Joined 1 year ago
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Cake day: July 1st, 2023

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  • cogman@lemmy.worldtoLemmy Shitpost@lemmy.worldReal
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    2 months ago

    An insulated box with a decent compressor does not cost 10k. Making a compressor that fails after 2 years is actually hard to do, something both LG and Samsung spent time and money to achieve.

    Consider, for example, that nearly every car manufactured with an AC. Which is exactly the same tech as a fridge. Yet you rarely end up needing to replace the compressor on your car. You might need to recharge it or clean it, but not replace the compressor. 10k of your car price isn’t the HVAC.


  • cogman@lemmy.worldtoLemmy Shitpost@lemmy.worldReal
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    2 months ago

    There’s some appliance breakdown vids (idk if Rossman is one of them) but the gist is Samsung and LG like to put cheap plastic parts in high wear locations which inevitably fail.

    Fridges are dead simple appliances. A compressor and evaporator coils with a temperature sensor. There’s absolutely no reason they shouldn’t outlast you and everyone you love.

    It’s insane these “premium” brands are built to fall like they do.





  • cogman@lemmy.worldtoLemmy Shitpost@lemmy.worldNot happening, dude
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    4 months ago

    Where does your power come from?

    Right now? Primarily hydro with a strong solar and wind showing. Roughly 10% of my power is from Fossil fuels.

    You are just shifting the shit elsewhere

    Even with a pure fossil fuel grid, EVs still end up producing less CO2 than ICE vehicles. However, grids aren’t pure fossil fuels which means EVs are far cleaner than Fossil fuel vehicles. Especially in my current circumstance.

    Less than 8% of energy consumption in the US comes from renewable energy. Another 8% come from nuclear.

    13% while being one of the fastest growing energy production sectors.

    https://www.eia.gov/energyexplained/us-energy-facts/

    That’s petrol / natural gas / coal powering your home, factories, shops, and restaurant

    Not mine because I live in the Pacific North West which is the greenest grid in the US.









  • Bingo. They are better than burning fuel, full stop. Further EV shipping is also a net good. Biking and walking is the best, but if you are like me you live 10+ miles from work with no public transport to fill the gaps. It was either that or getting fucked over with rent.

    People down on EVs are letting perfect be the enemy of good.



  • What do you think copper ore looks like? What tools would you use?

    Ancient mining was a punishment, generally a death sentence. It’s hard work often overseen by a slave master.

    Copper ore isn’t concentrated copper either a lot of ore goes into a little copper. There’s a reason only the really wealthy had copper items.


  • Ever wonder why it goes bronze age and then iron age? It’s because it’s a minor miracle humanity discovered how to smelt iron. Iron requires temperatures higher than you can achieve with just wood. Iron absorbs carbon and sulfur making it worthless (in the wrong mixtures).

    The process is complex and resource intensive.

    Assuming a bronze age civilization, copper or tin is the best you can hope for. Finding a magnet is going to be difficult because there’s not really ferromagnetic materials available. In the modern era the most common material is iron.


  • cogman@lemmy.worldtoLemmy Shitpost@lemmy.worldincredible
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    1 year ago

    Copper is the easy part. Get it hot enough and you’ll end up with high quality copper… Sourcing the copper is much more difficult.

    Finding magnets is somewhat simple, you just need some iron… That’s a lot more difficult. Iron smelting is way harder than copper smelting (especially without electricity).

    Making bearings is also difficult. It requires not only iron smelting but also high precision machining.