• 37 Posts
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Joined 2 years ago
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Cake day: June 14th, 2023

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  • When I was at uni a friend who was looking for a flat said something that kind of blew my mind about what I had been looking for with places to live. I pointed out that he could have saved a chunk of money a month on rent by getting a different place. He said “Yeah, but I’ve got to think about my standard of living.”

    It’s not wasteful to use energy if you’re making use of it.



  • Really annoying that you’ve been downvoted for a very reasonable take.

    and the buses are at their busiest so discouraging extra users at that time is beneficial.

    This is the key justification. However, the issue it points to is that the government are putting the desires of a business (primarily First Group) before the needs of the population.

    The goverment should make law for the benefit of the people, and businesses should work within the law in service to the people, especially people that pay them. The bus companies should run more busses at peak times to meet the added demand disabled people bring.

    Bus companies get massive subsidies and the businesses are stuctured in such a way as to squirrel their profits away so they can demand more. That the government, the people supposed to represent us, are capitulating to them further is an insult at best.






  • They’re called batteries, but they’re not batteries, by definition. They’re called batteries mainly for marketing, I imagine.

    However on the grid in English speaking countries they will refer to them differently. Probably TES or TESS, as it goes nicely with BESS (Battery Energy Storage System), which is the common industry name for grid scale electric batteries. Furthermore, in that sector it’s necessary to have clear distinction, as different types of generation have different characteristics.

    Source: am HV electrical engineer.


  • My bad, I had multiple wiki tabs open and got confused which one it was. I was quoting from the wiki on batteries, which the above wiki links to when it says an energy store “is generally called an accumulator or battery”.

    So, at best, the wiki citation given by the user above cites another more technical wiki that immediately states the opposite of what’s being claimed.

    Electric batteries are defined as a number of cells, made of electrolyte and metal contacts, arranged together to form a “battery” of cells. An electric battery is a type of energy storage device.

    A “sand battery” is also an energy storage device, but meets neither the definition of “electric battery” or the general definition of “battery” as it is not a multiple of some unit. Thus it is not a battery. The only way it is a battery is as a marketing term.


  • There are other methods, but they’re far less efficient.

    Solar panels convert light, not heat, into electricity. Specifically, photons (light) excite electrons in the solar cell, and these excited electrons then move through the solar cell and form a current.

    This isn’t really being used to generate electricity. They’re developing a generator from it, but currently it’s used for purely thermal energy transfer. Basically, the towns have big pipes running through them for communal heating, and these pipes are heated by this thermal energy storage.

    I imagine they’re only talking about electricity generation as an extra revenue stream for their customers who buy these, rather than it being a good solution for storing and generating electricity. The 90% efficiency is much better than combustion generators, but far worse than true electric batteries.


  • I’m not knocking the tech, I’m criticising the article for getting the terminology completely wrong. Moreso, the manufacturer has even fewer excuses.

    Maybe there’s a language thing here, but in English battery is not the appropriate term for this. “Battery” really refers to just a bank of some multiple of something. Originally it was naval weapons and then in electrics it was multiple cells of electrolyte. An electric battery is a specific type of energy storage, this is a different type: thermal energy storage or TES.

    Hell, on the grid you don’t even refer to battery electric storage as batteries that much, the common term is BESS - Battery Energy Storage System.


  • Eventually “battery” evolved to mean electric power storage device regardless of cell construction. Now apparently it also includes thermal charging, storage and discharging, even when only a single cell.

    The thing is, it didn’t evolve that way. Battery is a technical term with a defined meaning. Colloquial use by people ignorant of it cannot change the technical definition, because technical definitions are not set colloquially like most language is.

    Saying it evolved that way is like saying “windmills” generate electricity. The term is wrong, and anyone doing anything meaningful in that industry knows they’re not mills, they’re wind turbine generators, or turbines. People might know what you mean when you use the wrong term, but that doesn’t make your term in any way correct.


  • Sure, and windmills generate electricity and high voltage is anything above 30V.

    People say a lot of nonsense, particularly when they’re adjacent but not really a part of a technical field.

    A “battery” is a multiple of some kind of module. You can have a “battery” of Anti-Aircraft guns. In electrics, a battery is made up of multiple cells, and these cells are made of two metals inside an electrolyte.

    This is not multiple modules of anything, and this is not made up of metals and electrolytes. This is not a battery.

    Edit: Also, your wiki link literally starts with (my emphasis):

    An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections[1] for powering electrical devices.