• timochka@lemmy.zip
            22·
            1 day ago

            If your gas is compressing itself, it’s creating a high-pressure environment in your, err, guts. That means it’s creating a lower-pressure area outside - i.e. you are sucking gas in to compress it.

            Farting or belching - i.e. ‘gas’ in American - is rapid /decompression/, not compression.

            (In practice, I think it’s rather more a case of gas is /created/ by biological means, i.e. it is not ‘compressing’ anything per se.)

            It’s possible that you suck more for not being able to take a joke, though.

      • timochka@lemmy.zip
        54·
        1 day ago

        “It” does nothing of the sort.

        But yes, it’s likely that an electric cryo pump would be used to fill a feed tank at the fuelling station, I wasn’t expecting it to be fuelled by unicorn farts.

        Now, since apparently we have to walk this step by step for you, how do you think the electric compressor is powered? The clue is in the name “electric”, if that helps.

        And for your gold star - try to work out where “electricity” comes from. In the US. You know, “clean coal” country.

        • OhStopYellingAtMe@lemmy.world
          11·
          4 hours ago

          Why are you responding in such a condescending tone?  Was my reply in any way as rude?  Do you hold all of your internet conversations by talking down to your fellow contributors? You don’t know who we are; you don’t have any right to reply like that. Grow up. Keep your “gold stars” and “walk step by step for you’s” to yourself. If you can’t be civil to strangers, then keep your opinions to yourself.

          The compressed gas that “it” uses is compressed with electricity, yes.

          …and yes, I realize the gas is not compressed onboard, and that the car doesn’t accomplish this on “its” own.  I’m sorry my simpler phrasing upset you so. If I say “the car uses a DC power supply,” I don’t mean to imply that the car connects “itself” to the charger either. “It” (the car) utilizes a compressed gas source, which was electrically powered.

          Sure, that minuscule amount of electricity could be generated by way of fossil fuel power plants, but seeing as how this is a Tesla demo, probably a one-off (assuming Musk is lying about delivering - as he usually is), and Tesla’s “gigafactory” uses a massive solar farm in addition to the local power grid (which may include fossil fuels), it’s nearly a wash. A tiny “carbon footprint,” if any at all. Hell, manufacturing those bottle lids probably generates a larger carbon footprint.

          Like [@DJKJuicy@sh.itjust.works]\ said, there are plenty of other aspects to this to make fun of.  Arguing that the compressed gas is somehow contributing to its global footprint is stupid. But then, so is arguing with strangers on the internet.

          • timochka@lemmy.zip
            11·
            3 hours ago

            Were you homeschooled?

            The energy required to flip a tonne of car is not “miniscule”, and that is the amount of energy the compressor needs to put into the gas - plus all the additional energy required because compressor and cryopump are not terribly efficient; and to cap it all, compressed gas jets are also an incredibly inefficient way to lift anything, you get roughly 25% of the compressed energy out as kinetic energy (there is a reason, after all, that SpaceX use them for attitude control, not to actually launch rockets.)

            All told, hovering a 1 tonne car (which is generous, given the weight of a Tesla) with gas thrusters would require about 3 kWh of energy input per second - the fact that it gets stored as a gas instead of in a battery does not suddenly make this magic fairy dust with no environmental impact.

            Back of the envelope maths and the comments from Tesla’s own engineers suggests that demo used 300kWh minimum - more if they used industrially supplied liquid nitrogen. Which is to say one numbnuts trick to impress 8 year olds used as much energy as driving a typical EV 1,500km.

            If you think that is not a negative for the environment, well… Why would I expect anything else from a septic?